Re: [rules-users] Guvnor Test Scenario - value equality
Please attach your (rule) source. You don't provide much for the community to go on. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Libor Nenadál Sent: 13 November 2009 13:59 To: rules-users@lists.jboss.org Subject: [rules-users] Guvnor Test Scenario - value equality Hello, I came to a problem when scenario fails because field values do not equal to those expected although they actually do. Here is the result after scenario run: [TransactionBatch] field [otherPartyAccountNumber] was [12345678] expected [12345678]. [TransactionBatch] field [otherPartyAccountSuffix] was [1234]. Both fields are of int type and the first does not match although it should. Can you please point me to where the problem can be? Thank you, Libor View this message in context: Guvnor Test Scenario - value equality http://old.nabble.com/Guvnor-Test-Scenario---value-equality-tp26336990p26336990.html Sent from the drools - user mailing list archive http://old.nabble.com/drools---user-f11823.html at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Java beans inheritance
If you are checking for class in the LHS would it not be better to define a separate rule for the subclass? I assume you're doing something like:- rule current when MyClass(class == MySubClassOfMyClass.class) then //Something specific to the subclass end When something like this might be more suited? rule super when MyClass() then //Do generic stuff end rule sub when MySubClassOfMyClass() then //Do something more specific end I don't know whether this would cause two activations or whether the more generic would swallow the Fact in the first ObjectType node in the RETE network; Edson? From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Wolfgang Laun Sent: 12 November 2009 16:48 To: Rules Users List Subject: Re: [rules-users] Java beans inheritance Are you using MVEL at all in this rule? Anyway, better would be class == SomeClass.class which avoids string handling. -W On Thu, Nov 12, 2009 at 3:25 PM, Zohar Etzioni zohar.etzi...@gmail.com wrote: Hi, I have a class hierarchy of objects that I'm inserting as facts. Lets say X, Y extends X and Z extends Y. I have a rule that is defined on X and therefore applies to all of them, however in the rule I want to ask about the class name and I'm referring to it as class.name==some.class. This should work as far as I understand coz it keeps the java beans format, however it is not directly defined in the class X but rather in Object. The error I'm getting is Error: could not access: name. Any idea what I'm doing wrong? Thanks, Dawg ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Specific Agenda strategy to control which rulesto fire
Hi Wolfgang,
I'm interested with your reply and am trying to better understand it (although
the use-case has nothing to do with what I do!)
The Score class has a constructor taking Deal and level (assume to be akin to
priority in the original post); however your example Fact insertions exclude
level for the Score Fact.
I assume Score's level should be initially set to the highest (most granular)
level; e.g. 2 in the example cited (ranging from 0-2)?
It's good to see and understand other's approaches.
Cheers,
Mike
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Wolfgang Laun
Sent: 29 October 2009 07:09
To: Rules Users List
Subject: Re: [rules-users] Specific Agenda strategy to control which
rulesto fire
I don't think you should consider an agenda strategy for this.
Add a simple class:
class Score{
int level; int coun; Deal deal; Book book;
Score( Deal deal, int level ){...}
}
and insert an instance along with the Deal to be classified:
insert( deal );
insert( new Score( deal ) );
Rules for level 2 would be written according to:
rule trader and product
salience 10
when
$s : Score( level == 2, $d : deal )
Deal( this == $d, trader==Alex, product == GOOG )
then
$s.setCount( $s.getCount() + 1 );
$s.setBook( B2 );
end
Then you'll need a couple of rules handling success and failure:
rule post level success
salience 5
when
$s : Score( $l : level, count == 1, $d : deal, $b : book )
then
assign $d to $b, retract $d
retract( $s );
end
rule post level failure
salience 5
when
$s : Score( $l : level, count != 1 )
then
modify( $s ){
setLevel( $l - 1 );
}
end
Rules for level 1 would also be at salience 10.
A rule for level == 0 should catch Deals gone down through all levels.
-W
2009/10/28 Costigliola Joel (EXT) joel.costigliola-...@natixis.com
Hello all,
I need some help to to set a specific Agenda strategy in order
to control finely which activated rules will be fired.
Problem context :
-
My company is a bank where traders are making deals on markets,
these deals must be classified in book, this is what we call booking process.
Booking is done according to booking criteria : which trader
has made the deal ? on which product ? wich market ? etc ...
A booking rule defines a set of criteria and the target book
where the deal will classified, it also has a priority, note that it is ok that
two booking rule have same priority.
I want to implement booking rule as Drools rule.
Several booking rule can be applied to a deal, in that case
choosing the right booking rule to fire depends on the following algorithm :
- look all the activated booking rule of the highest priority,
--- if there is a unique rule apply it
--- if there is no unique rule (0 rule or more than one), look
at rules of a lesser priority and apply the same logic.
Next section is an example that will clear things (I hope).
Example :
-
A deal D1 has been done by Alex on NY market to buy Google
stocks.
We have 3 booking rules :
- BR1 : criteria = trader=Alex / book = B1
- BR2 : criteria = trader=Alex and product = google stock /
book = B2
As BR2 is more precise than BR1, il will matches the deal and
book it in B1
If the deal was on another product, BR1 would have been applied.
Things gets more complicated when 2 rules of same priority can
be applied.
Let's imagine we add the following booking rule
- BR3 : criteria = trader=Alex and market = NY / book = B3
We have a problem to book D1 since BR2 and BR3 can be applied
but have same priority.
We can't choose one over the other thus we must apply a less
precise/prioritary rule (if unique at its own precision level).
In my example, that would lead to apply BR1.
Question :
--
If I
Re: [rules-users] Better way to run each rule once?
You could look into using a sequential RETE network
http://blog.athico.com/2007/07/sequential-rete.html
http://www.redhat.com/docs/manuals/jboss/jboss-soa-4.2/html/JBoss_Rules_
Manual/ch02s05s10.html
But as Greg suggests, better understanding your use-case might furnish
other ideas.
-Original Message-
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Greg Barton
Sent: 08 October 2009 23:08
To: Rules Users List
Subject: Re: [rules-users] Better way to run each rule once?
Could you give some sample rules and the nature of the problem you're
solving? Maybe you don't need to update all of the time with a
different approach.
- Original Message
From: Dave Schweisguth d...@schweisguth.org
To: rules-users@lists.jboss.org
Sent: Thu, October 8, 2009 4:43:34 PM
Subject: [rules-users] Better way to run each rule once?
Greetings fellow Droolers,
Each of our rules modifies the fact it matches. We'd like to run each of
those rules exactly once, not reactivating them when a fact changes. I
see
from the archives that I'm not the first person to discover that no-loop
is
too weak and lock-on-activate too strong for my purposes.
I implemented our requirement with an AgendaListener that remembers
hashes
of rules + facts. This works but requires each fact to implement an
interface with a method that returns the hash, and means TWO casts each
time
I examine a FactHandle. The whole AgendaFilter is below so you can see
what
I mean.
Can anyone suggest a better way? I'm looking more for a better approach
altogether than I am for critique of the implementation of my current
approach, although the latter would not be unwelcome.
private static class Once
implements AgendaFilter {
private final SetInteger alreadyActivatedRules = new
HashSetInteger();
public boolean accept(Activation activation) {
int hash = activation.getRule().getName().hashCode();
for (FactHandle handle: activation.getFactHandles()) {
Object object = ((DefaultFactHandle) handle).getObject();
hash *= 31;
if (object instanceof Identifiable) {
hash += ((Identifiable) object).getIdentity();
} else if (object instanceof String) {
// We get here when a rule uses from on a string collection
hash += object.hashCode();
} else {
throw new IllegalStateException(
Don't know what to do with fact class
+ object.getClass() + , value + object);
}
}
boolean accept = !alreadyActivatedRules.contains(hash);
alreadyActivatedRules.add(hash);
return accept;
}
}
Thanks cheers,
--
| Dave Schweisguth
http://schweisguth.org/~dave/ |
| Home: dave at schweisguth.orgWork:
http://www.nileguide.com/ |
| For compliance with the NJ Right to Know Act: Contents partially
unknown |
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Re: [rules-users] How to prevent activation list creation onretracts
Can I just clarify that you *need* truth maintenance on the inserts but not on the retractions? -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Greg Barton Sent: 16 September 2009 21:28 To: Rules Users List Subject: Re: [rules-users] How to prevent activation list creation onretracts You can't have concurrent threads, each with a session? Or do you need all transactions processed serially? Also, can you process simultaneous transactions in the same working memory without retracting objects from the previous one? Objects from previous transactions could then be cleaned up by low priority rules that ran between transactions. (Of course, there's potential memory build up problems involved with that, but that can be mediated. A high priority rule could kick in if there are too many completed transactions hanging around.) You could call halt() then clearAgenda() on the session when you're done with a transaction, then retract all objects. Maybe that will be faster. Having the agenda clear might make it faster because there would be no activations to check against the retracted objects. (Though it would still have to remove them from the rete node memories.) That's just a guess, though. --- On Wed, 9/16/09, Scott Burrows scottjburr...@gmail.com wrote: From: Scott Burrows scottjburr...@gmail.com Subject: Re: [rules-users] How to prevent activation list creation on retracts To: Rules Users List rules-users@lists.jboss.org Date: Wednesday, September 16, 2009, 2:00 PM Thanks Greg but I have tried that, creating a newstatefulsession is slowish, taking around 800 milliseconds to do. When milliseconds count 800 is too long. It's faster to do the retracts, they take about 400 millis. Someone showed a command or configuration recently that tells workingmemory not to re-eval the rules. I'm looking for that switch or something equivalent. Our system is a live transaction system. The trans need to be completed and ready for the next one in under a second. Scott On Wed, Sep 16, 2009 at 2:06 PM, Greg Barton greg_bar...@yahoo.com wrote: Dispose of your session and create another. --- On Wed, 9/16/09, Scott Burrows scottjburr...@gmail.com wrote: From: Scott Burrows scottjburr...@gmail.com Subject: [rules-users] How to prevent activation list creation on retracts To: Rules Users List rules-users@lists.jboss.org Date: Wednesday, September 16, 2009, 12:50 PM I think this question was asked recently but I cant seem to find it. Using 4.0.7 I have a large number of facts I need to retract from working memory after all rules have been processed (transaction is completed) so I can insert new facts for the next transaction. Milliseconds count. I know that drools recalc's which rules are eligible to be run after each retraction. Since all facts are being removed its unneeded processing and time that could be saved. How can I tell drools that until I tell it otherwise do not re-evaluate the rules to save time? Scott -Inline Attachment Follows- ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -Inline Attachment Follows- ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Applying rules on xml data
Hi Nilima, This might be of interest http://www.theserverside.com/discussions/thread.tss?thread_id=46708 although I don't know whether it is supported with Drools 5.x. Otherwise I believe your only option is to use JAXB to map the XML into POJO's. I am unsure whether there is a native channel in the Drools API or whether you will need to bake your own. With kind regards, Mike From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Nilima R Sent: 16 September 2009 09:20 To: rules-users@lists.jboss.org Subject: [rules-users] Applying rules on xml data Hi All, I have a wb service which returns me xml and I need to apply rules on that xml data and not pOJO. Can someone point me some refrence link. I am using Guvnor. Thanks Nilima Rajendra Raichandani Sub Focus Area Lead - BPM/BAM/BRE TEG - Open Source Platform Tata Consultancy Services Ph:- 9322108518 Cell:- +91 20 6608 7184 Mailto: nilim...@tcs.com Website: http://www.tcs.com http://www.tcs.com/ Experience certainty. IT Services Business Solutions Outsourcing =-=-= Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Applying rules on xml data
crawling back under my stone - to spend the weekend R'ingTFM ;-) -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Jaroslaw Kijanowski Sent: 16 September 2009 09:41 To: Rules Users List Subject: Re: [rules-users] Applying rules on xml data Hi, you will need to create POJOs out of your XML. Drools Pipeline and smooks transformer are your friends. https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/ trunk/target/docs/drools-expert/html_single/index.html#d0e2004 http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-pipelin e/drools-transformer-smooks/src/test/java/org/drools/runtime/pipeline/im pl/SmookStatefulSessionTest.java Cheers, Jarek Nilima R wrote: Hi All, I have a wb service which returns me xml and I need to apply rules on that xml data and not pOJO. Can someone point me some refrence link. I am using Guvnor. Thanks Nilima Rajendra Raichandani Sub Focus Area Lead - BPM/BAM/BRE TEG - Open Source Platform Tata Consultancy Services Ph:- 9322108518 Cell:- +91 20 6608 7184 Mailto: nilim...@tcs.com mailto:nilim...@tcs.com Website: http://www.tcs.com http://www.tcs.com/ Experience certainty. IT Services Business Solutions Outsourcing =-=-= Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools Fuson and Deltas (differences)
Let me understand you better. The events do not contain any information about source other than what can be implied from their temporal position? Source 1 : 0s, 15s, 30s, 35s etc Source 2: 5s, 20s, 35s, 40s etc What if the period between events for a specific source were greater than 15s (as you state) which caused an overlap with another source? Source 1: 0s, 15s, 35s, 40s etc Source 2: 5s, 20s, 35s, 40s etc I would have thought without being able to ascertain source from the event Fact it would be almost impossible to achieve your use-case. With kind regards, Mike -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of skasab2s Sent: 12 September 2009 11:54 To: rules-users@lists.jboss.org Subject: [rules-users] Drools Fuson and Deltas (differences) Hi guys, I have the following problem, which I'm trying to solve with Drools-Fusion: Every 15 seconds(or more) happens an event, that contains an unique number. For example every 15 seconds(or more) comes a Temperature of a patient with a new different value as an event. The problem is, that it is possible, that between two of those Temperatures other Temperatures from a differrent source appear: Second 0: Nothing ... Second: 15: Temperature: 37.5 ... Second: 20 Temperature 38.8 ... Second: 30 Temperature: 36.5 Is it possible with Drools Fuzion to detect that Temperature 38.8 is from other source (because it has happended between the 15th and 30th second) and calculate the difference between the temperature 38.8 and 37.5 (in this case)? Thanks a lot! Svetlomir. -- View this message in context: http://www.nabble.com/Drools-Fuson-and-Deltas-%28differences%29-tp254134 21p25413421.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] modify facts problem
what version of Drools are you using? From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Vikram Pancholi Sent: 27 August 2009 15:30 To: rules-users@lists.jboss.org Subject: [rules-users] modify facts problem Hi, I am having problem about modifying certain fact. For example 1) I have User status when inserted set to value 1. 2) in the modify in a rule block i m changing this to 5. 3)Now i have a flow where i have a wait which waits this user status is not value 1. After the rule is fired ans the status is changed to false, in the next step i am checking this status of user status in an XOR split constraints but i still get the status in the constraint as 1. I have got no clues whts going on. I tried printing this value in the getting the objects using classobjectfilter and then specyfing the class again, the value is still shown as 1. I am very much confused about this. Is this some effect of Shadow facts. awaiting your response. Regards Vikram Pancholi ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Hibernate Query delivers wrong values
I assume ...but when I change a field of a db-record manually... means you go into the database and tweak a field? In which case this is definitely a hibernate session usage issue and I'd suggest you read up on the latter. With kind regards, Mike -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Thomas Zwifl Sent: 10 July 2009 11:46 To: rules-users@lists.jboss.org Subject: [rules-users] Hibernate Query delivers wrong values Hi there! I'm working with the latest snapshot-releas of v5.1 (build3098-rev27324-20090630-0403). My application consists of two independent processes, both are repeated periodically (timer-node). the processes both have ruleset-nodes. some rules are querying a database with hibernate in the rule condition (LHS). the queried objects are then inserted into workinmemory (insert(object)), then some computation follows, the objects are modified and written back to db, and then the objects are retracted (retract(object)). Now to the problem: when I start the application, everything works correct, and leads to the right results. But when I change a field of a db-record manually, the hibernate-query delivers the old values!! (of course the changes are committed.) Anyone has an idea whats going wrong here? Is there some kind of caching mechanism that delivers the old objects instead of querying the database? greetz! tom -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] How execute a Single rule from rule file or rulepackage
If each rule is held within a unique agenda, you could use agenda filters. How would you determine which rule needs to be activated though? You'd need some criteria hard-coded elsewhere in your application. Why not make this part of the rules too? From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Amila Silva Sent: 03 July 2009 07:17 To: rules-users@lists.jboss.org Subject: [rules-users] How execute a Single rule from rule file or rulepackage hi everyone, I have a requirement like execute a single rule from set of loaded rule files or single rule from single drl file. when i execute fireAllRules() it executes the all the rules in the files. even that overloaded method that take int as agrs also seems doesnt help much. let me know if any body gone thru this kind of senarios. -- Thanks, Regrads, Amila Silva, Associate Software Engineer hSenid Mobile Solutions Phone : +94-77-9983894 Fax : +94-11-2673 845 Web: http://www.hSenid.com Make it Happen http://www.hSenidMobile.com Enabling the Mobile World Disclaimer: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to which they are addressed. The content and opinions contained in this email are not necessarily those of hSenid Software International. If you have received this email in error please contact the sender. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Formula value assginment in LHS
Why not simply use something like this:- rule TaxCalc when $i : Invoice($st : salesTax, $gst : gstRate, $sa : salesAmount, $id : importDuty, $gr : govtRebate) then $i.setTotalTax(round($st + ($gst * $sa / 100) + $id - $gr, 2)); update($i); end What do you gain by checking whether the Total Tax is different from the value of the calculation? I must be missing something from your simplified example?!? (I think, big disclaimer!!) you could achieve your requirement using eval and a tax value function that uses a cache under the hood, much like the following:- rule TaxCalc when $i : Invoice($tt : totalTax, $st : salesTax, $gst : gstRate, $sa : salesAmount, $id : importDuty, $gr : govtRebate) eval(Invoice($tt != taxFunction($st, $gst, $sa, Sid, $gr)) then $i.setTotalTax(taxFunction($st, $gst, $sa, Sid, $gr); update($i); end Evals cannot be indexed so you take a performance hit. With kind regards, Mike From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Shabbir Dhari Sent: 03 July 2009 01:24 To: rules-users@lists.jboss.org Subject: [rules-users] Formula value assginment in LHS Dear all We are developing a financial business application that contains hundreds of business rules for validations and calculations. In the calculation rules we change the value of attribute if values past in the request is incorrect e.g. rule TaxCalc when $i : Invoice() Invoice (totalTax != (round(salesTax + (gstRate * salesAmount / 100) + importDuty - govtRebate, 2))) then i.setTotalTax(round(salesTax + (gstRate * salesAmount / 100) + importDuty - govtRebate, 2)); end The above code works perfectly fine. Only problem is the perform calculation twice. What I was looking if possible I can store calculated tax in a variable and simply assign variable to attribute if rule condiation fails. Some thing like: rule TaxCalc when $i : Invoice() Invoice (totalTax != calTax : (round(salesTax + (gstRate * salesAmount / 100)+ importDuty - govtRebate, 2))) then i.setTotalTax(calTax); end But this does not work - shows system error at calculated value assignment. Is there any work around? Click here to find out more POP access for Hotmail is here! http://windowslive.ninemsn.com.au/article.aspx?id=802246 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] How to call a another drl file from one drl file
I believe you will need to add each DRL file into a single RuleBase (Drools 4.x terminology; I think KnowledgeBase in 5.0 but I'm a little rusty). Don't forget rules aren't evaluated when fireAllRules is called but as objects are inserted into WorkingMemory, so all rules need to be compiled into a RuleBase before object insertion. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Amila Silva Sent: 02 July 2009 11:07 To: rules-users@lists.jboss.org Subject: [rules-users] How to call a another drl file from one drl file hi, I have requirement to execute a chain of rules. One rule after another and they are reusable.I need to know how to call another drl file from a drl file. or in a then part of the a rule. thanks Amila Silva ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] forEach node Clarification
Your jpg was not visible at the enclosed URL. -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of rajakanthan Sent: 23 June 2009 02:24 To: rules-users@lists.jboss.org Subject: [rules-users] forEach node Clarification Hey guys, I'm doing a POC using drools and drools flow.I have inserted a image here after modifying some of ruleflow groups. There are more ruleflow groups. The rules belong to each ruleset in a composite node is perfectly working.Ok. fine. the problem is, when it comes to 'child service', a list of ChildService Object will be returned by POJO(let me say, ). For each object, the rules belong to Service 1,2 and 3 has to executed before coming out of this composite node 'Level Child'. I dont have any clue on this. what i have to be given in CollectionExpression and variableName property in forEach node? How to work on this forEach? http://www.nabble.com/file/p24150374/ServiceForEach.jpg -- View this message in context: http://www.nabble.com/forEach-node-Clarification-tp24150374p24150374.htm l Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] How to execute the SQL query using drools
You have not clearly defined when you want to execute SQL queries. If you want to access a DB from the LHS you can use the from keyword. Note the results need to be time-constant i.e. not change on successive calls. If you want to access a DB from the RHS it is plain Java (or MVEL depending upon your rule dialect). See the documentation for more information. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Amila Silva Sent: 23 June 2009 07:55 To: rules-users@lists.jboss.org Subject: [rules-users] How to execute the SQL query using drools hi All, I have requirement like to execute the sql queries through drools. is there are way to do it? please let me know asap. thanks amila silva ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] help
You need to provide more information. Your question is like me replying with I don't have any problems. Not very helpful. -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of SHIMI Abdelouahad ( Prestataire ) Sent: 22 June 2009 16:54 To: rules-users@lists.jboss.org Subject: [rules-users] help Effectivly by using the version 4 and plugin 4 of drools, the application Works without any problem, but with version 5 and plugin 5 of drooos i have allwise the exception. Is the first time that I use Drools, I don't undurtand why don't work, I need the help. Please please help This e-mail and/or attachment(s) is (are) confidential and may be legally protected. This message is addressed to the intended recipient only. If you are not the intended recipient of the message, please notify the sender immediately. Its contents do not constitute a commitment by the sender's company except where provided for in a written and signed agreement between you and sender's company. Any disclosure, use or dissemination, either in whole or in partial, shall be prior authorized by the sender's company by written and signed agreement. E-mail and/or attachment(s) cannot be guaranteed to be secured or error-free as information can be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender.s company has taken all reasonable precautions to ensure that any attachment to this message does not contain a virus. However, the sender.s company (and not any of its Officers, Directors, Employees or Agents) cannot be held liable for any damages resulting from or linked to the existence of a virus. You are therefore strongly advised to carry out all your own anti-virus checks before opening any and all attachments to this message. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Link for drools-server module
Did you replace the EL jar with that available from JBOSS? You will still need an EL jar somewhere if you are using JSF. Do you have Java security enabled in your Tomcat instance? I've previously had to put the EL jar in Tomcat's lib folder to fix other issues relating to the use of JSF and EL on Tomcat (not when trying to use Drools on Tomcat, but other standalone applications). -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of tanzu Sent: 22 June 2009 12:28 To: rules-users@lists.jboss.org Subject: [rules-users] Link for drools-server module Hi Can anyone please provide me with the following Tutorials about the detailed working and usage of the drools execution server. I have exported the drools-server in the drools 5 download, as a war and deployed on the application server to be used in conjuction with guvnor.But I am getting the following errrors. java.lang.IllegalStateException: Attempted to invoke a Seam component outside an initialized application at org.jboss.seam.contexts.Lifecycle.getApplication(Lifecycle.java:36) at org.jboss.seam.contexts.Lifecycle.mockApplication(Lifecycle.java:111) at org.jboss.seam.Seam.componentForName(Seam.java:298) at org.jboss.seam.intercept.RootInterceptor.getComponent(RootInterceptor.ja va:224) at org.jboss.seam.intercept.JavaBeanInterceptor.callPostActivate(JavaBeanIn terceptor.java:151) at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor. java:72) at org.drools.guvnor.server.security.RoleBasedPermissionManager_$$_javassis t_0.sessionDidActivate(RoleBasedPermissionManager_$$_javassist_0.java) at org.apache.catalina.session.StandardSession.activate(StandardSession.jav a:804) at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java: 397) at org.apache.catalina.session.StandardManager.load(StandardManager.java:32 1).. and java.lang.NoClassDefFoundError: javax/el/ExpressionFactory at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Unknown Source) at java.lang.Class.getConstructor0(Unknown Source) at java.lang.Class.newInstance0(Unknown Source) at java.lang.Class.newInstance(Unknown Source) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.j ava:3713) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4216 ) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.ja va:760) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:831) at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:720).. . I am working on tomcat 5.5.7 and eclipse 3.4. I have guvnor 5.0 runnning with this configuration.I have already copied the jsf jars in tomcat lib folder.As it is tomcat 5.5.7 and not 6.x , I havent removed el-api jar from drools-guvnor.war for depolyment. Please help I need the drools-server up and working. Thanks tanzu -- View this message in context: http://www.nabble.com/Link-for-drools-server-module-tp24142668p24142668. html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] How to execute the SQL query using drools
Let me see if I understand correctly. You want the user to be able to define the SQL query (table, field list, predicates) and have the resulting SQL executed within Drools? Is this your only requirement for the rules engine; if so have you thought a rules engine might not be your best option. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Amila Silva Sent: 23 June 2009 09:49 To: rules-users@lists.jboss.org Subject: [rules-users] How to execute the SQL query using drools Hi Anstis, I'm creating a rule engine which is basically a SQL query executor. for that i need to have a drool file where i can add new rules to build the different query criteria. user should be able to create new selection criteria. is there any way that i can define sql queries in side the drool files. thanks ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] How to execute the SQL query using drools
The best I think you could achieve would be something like this... Global ExecuterService es; rule execute some SQL when $q : Query() $f : Fields(query == $q) $t : Tables(query == $q) $p : Predicates(query == $q) then es.execute($f, $t, $p); end Still not sure if a rules engine is your best option, if I understand your use case correctly. From: Anstis, Michael (M.) Sent: 23 June 2009 10:00 To: 'ami...@hsenidmobile.com'; 'Rules Users List' Subject: RE: [rules-users] How to execute the SQL query using drools Let me see if I understand correctly. You want the user to be able to define the SQL query (table, field list, predicates) and have the resulting SQL executed within Drools? Is this your only requirement for the rules engine; if so have you thought a rules engine might not be your best option. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Amila Silva Sent: 23 June 2009 09:49 To: rules-users@lists.jboss.org Subject: [rules-users] How to execute the SQL query using drools Hi Anstis, I'm creating a rule engine which is basically a SQL query executor. for that i need to have a drool file where i can add new rules to build the different query criteria. user should be able to create new selection criteria. is there any way that i can define sql queries in side the drool files. thanks ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Link for drools-server module
Sounds like you found a solution! It could be worth you posting your configuration (including version of Tomcat, Drools components and EL) back to the forum to help others. Something showing the folder hierarchy and location of JARS would be good. You could even dig out the wiki page relating to Drools and Tomcat if you feel adventurous. I don't know anything about the REST api etc. Sorry. -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of tanzu Sent: 23 June 2009 10:15 To: rules-users@lists.jboss.org Subject: RE: [rules-users] Link for drools-server module Hi Michael I added the el-api 1.2 to tomcat 5.5.7/common/lib ,and then the drools-server started working.But then my web-client ,built on struts and using jsp not jsf ,started giving the same el-api error. I am also working with tomcat 6.0.3 .I had added the jsf jars from jboss ,but drools server and later my web - client application started to work ,but guvnor gave el-api version error.Because tomcat 6.0.3 had el-api and guvnor contained el-api 1.2 .So at last i removed the el-api 1.2 from guvnor ,and replaced it in tomcat lib with el-api. Bingo now all 3 guvnor ,drools-server ,and my web-client application are deployed in tomcat 6 and working fine. Still in need of a document describing ,the complete working of the rest api along with the web client to call drools server. Thanks Tanzu Anstis, Michael (M.) wrote: Did you replace the EL jar with that available from JBOSS? You will still need an EL jar somewhere if you are using JSF. Do you have Java security enabled in your Tomcat instance? I've previously had to put the EL jar in Tomcat's lib folder to fix other issues relating to the use of JSF and EL on Tomcat (not when trying to use Drools on Tomcat, but other standalone applications). -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of tanzu Sent: 22 June 2009 12:28 To: rules-users@lists.jboss.org Subject: [rules-users] Link for drools-server module Hi Can anyone please provide me with the following Tutorials about the detailed working and usage of the drools execution server. I have exported the drools-server in the drools 5 download, as a war and deployed on the application server to be used in conjuction with guvnor.But I am getting the following errrors. java.lang.IllegalStateException: Attempted to invoke a Seam component outside an initialized application at org.jboss.seam.contexts.Lifecycle.getApplication(Lifecycle.java:36) at org.jboss.seam.contexts.Lifecycle.mockApplication(Lifecycle.java:111) at org.jboss.seam.Seam.componentForName(Seam.java:298) at org.jboss.seam.intercept.RootInterceptor.getComponent(RootInterceptor.ja va:224) at org.jboss.seam.intercept.JavaBeanInterceptor.callPostActivate(JavaBeanIn terceptor.java:151) at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor. java:72) at org.drools.guvnor.server.security.RoleBasedPermissionManager_$$_javassis t_0.sessionDidActivate(RoleBasedPermissionManager_$$_javassist_0.java) at org.apache.catalina.session.StandardSession.activate(StandardSession.jav a:804) at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java: 397) at org.apache.catalina.session.StandardManager.load(StandardManager.java:32 1).. and java.lang.NoClassDefFoundError: javax/el/ExpressionFactory at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Unknown Source) at java.lang.Class.getConstructor0(Unknown Source) at java.lang.Class.newInstance0(Unknown Source) at java.lang.Class.newInstance(Unknown Source) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.j ava:3713) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4216 ) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.ja va:760) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:831) at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:720).. . I am working on tomcat 5.5.7 and eclipse 3.4. I have guvnor 5.0 runnning with this configuration.I have already copied the jsf jars in tomcat lib folder.As it is tomcat 5.5.7 and not 6.x , I havent removed el-api jar from drools-guvnor.war for depolyment. Please help I need the drools-server up and working. Thanks tanzu -- View this message in context: http://www.nabble.com/Link-for-drools-server-module-tp24142668p24142668. html Sent
RE: [rules-users] How to execute the SQL query using drools
Your requirement isn't that clear however here's a few thoughts:- Data can be inserted into the Rule Engine either externally (i.e. WorkingMemory.insert) or internally (using from). If you use DSL you can make DRL more human readable; although neither are binary format in the first place. Drools will fit your requirement, but without knowing your use-cases better I can't say whether it would be the best fit. Perhaps if you can give a more detailed use-case the group would be better able to comment further. Please also ensure your emails go to the group http://www.jboss.org/drools/lists.html Finally, do read the documentation, you would probably be able to answer your own questions. With kind regards, Mike From: Amila Silva [mailto:ami...@hsenidmobile.com] Sent: 23 June 2009 10:58 To: Anstis, Michael (M.) Subject: Re: [rules-users] How to execute the SQL query using drools Thanks Michael, another thing can you tell me how can select data set or execute some queries using the drools ? can we have method to store rules as humand readable format instead of binary format? My requirement is to have rule engine , basically there are some set of rules which used to execute some queries and populate some tables depend on the situations, other than that need have every flexible rule engine instead of hard coded rule in java? what you think,is it possible to use drools for my requirement. thank you very much amila On Tue, Jun 23, 2009 at 2:29 PM, Anstis, Michael (M.) manst...@ford.com wrote: Let me see if I understand correctly. You want the user to be able to define the SQL query (table, field list, predicates) and have the resulting SQL executed within Drools? Is this your only requirement for the rules engine; if so have you thought a rules engine might not be your best option. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Amila Silva Sent: 23 June 2009 09:49 To: rules-users@lists.jboss.org Subject: [rules-users] How to execute the SQL query using drools Hi Anstis, I'm creating a rule engine which is basically a SQL query executor. for that i need to have a drool file where i can add new rules to build the different query criteria. user should be able to create new selection criteria. is there any way that i can define sql queries in side the drool files. thanks -- Thanks, Regrads, Amila Silva, Associate Software Engineer hSenid Mobile Solutions Phone : +94-77-9983894 Fax : +94-11-2673 845 Web: http://www.hSenid.com Make it Happen http://www.hSenidMobile.com Enabling the Mobile World Disclaimer: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to which they are addressed. The content and opinions contained in this email are not necessarily those of hSenid Software International. If you have received this email in error please contact the sender. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Inserting Collection into WorkingMemory
Correct me if I misunderstand:- (1) You have a list of Strings accessible using a generic businessData property. (2) Nestled within the list *you happen to know* one of the values represents a SSN and another the loan amount. (3) You expect Drools to read your mind and workout how to determine the meaning of individual items in the list. You can check whether the businessData contains a value using the contains operator. Whether the value is however a SSN or a loan amount is anyones guess as demonstrated below. If you don't have discrete accessors for individual businessData items then I believe a map is your best option. Rule read my mind When $p : ProcessRequest(businessData contains 1234) Then System.println(ProcessRequest contains '1234' however I have no idea whether it is a SSN or loan amount); End With kind regards, Mike -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of VinuJay Sent: 11 June 2009 07:39 To: rules-users@lists.jboss.org Subject: Re: [rules-users] Inserting Collection into WorkingMemory Hi Andrew, Thanks for the reply. My problem is i don't have any input values for businessdata, i need to evaluate only on the key (name) of business data. Like if SSN == 1234 LoanAmount 5 assign to jcooper So ListString,String businessData in my Fact object would not be useful. I need the values for the business data to be picked up from the rules file (.drl) itself. -- View this message in context: http://www.nabble.com/Inserting-Collection-into-WorkingMemory-tp23975474 p23976147.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] OR operator affects how many times Rule's actionis executed
I believe the answer is that Drools implements sub-rule compilation for rules containing or. So in essence your rulebase contains the following once compiled:- rule fire_twice_a no-loop true when eval(true) then System.out.println(word); end rule fire_twice_b no-loop true when eval(true) then System.out.println(word); end -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of sergey.olifirenko Sent: 08 June 2009 13:39 To: rules-users@lists.jboss.org Subject: Re: [rules-users] OR operator affects how many times Rule's actionis executed More simple example: package continuated_rules dialect mvel rule fire_twice no-loop true when eval(true) or eval(true) then System.out.println(word); end output is: word word why does it happens ? -- View this message in context: http://www.nabble.com/OR-operator-affects-how-many-times-Rule%27s-action -is-executed-tp23910106p23923259.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] A relational SQL Database as RuleBase
Perhaps, as Otter suggested, you provide a little more information about what you are trying to achieve? quote Rene, mhhm, what are your trying to do (besides storing rules in a rdbms)? What's the use-case? /quote -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of r.r.neum...@freenet.de Sent: 04 June 2009 08:32 To: rules-users@lists.jboss.org Subject: Re: [rules-users] A relational SQL Database as RuleBase It's just a question still now :) ... -- View this message in context: http://www.nabble.com/A-relational-SQL-Database-as-RuleBase-tp2383p2 3865137.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] high cpu usage
Lets think about your new question logically. A CPU cannot give more than 100% utilisation. If Drools is consuming 80% and other applications require less than 20% then the other applications performance will not degrade. If however the other applications require more than 20% CPU utilisation then one of the process's performance will degrade - whether it is Drools or the other applications depends upon the thread scheduler and which threads have higher priority. -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of techy Sent: 25 March 2009 11:17 To: rules-users@lists.jboss.org Subject: Re: [rules-users] high cpu usage Thanks for your valuable input. I did further testing in TEST solaris machine where other apps too are running. 1.In the consumer, I launched 5-10 threads of parallel execution with drools stateless session. It did performed well with more cpu usage. it maintained avg cpu usage of 65-70%. occasional spikes went to 85-90%. while I was doing this, Other apps contacted me about this and showed their concern too. So this brings up another question. Will drools high cpu usage degrade other app performance when they are running in same machine same time? Thanks again! nheron wrote: Hello, Yes, when running drools, the cpu usages goes high. It is one of the main caracteristic with rule engine : the more cpu you have the quickler it is !! It is normal because all the rete graph Co are in ram and drools work on it. So there is not wait for database, IO and co so CPU goes very high very quicly but is is normal ! All my customers have this surprise : a 4 CPU machine instead one one makes it able to have 4 concurrent drools sessions to work in parallele with the same performance as one session on one CPU ! Regards Nicolas Heron Regards Nicolas Le mercredi 25 mars 2009 à 10:05 +0100, Wolfgang Laun a écrit : The figures you gave just indicate that you have a good balance between I/O and CPU load. The increase between no rules and ~60 rules is to be expected as all the work is being done during fact insertion. Of course, adding more and more rules will, eventually, push the CPU load factor to the natural upper limit. If the overall throughput is good, why do you worry? -W On Tue, Mar 24, 2009 at 11:20 PM, techy techluver...@gmail.com wrote: Hello My app is functioning consumer/producer model. 1.Producer reads the data from DB and inserts to blocking queue 2.Consumer reads the data from queue and execute the rules using drools stateless session. Both producer and consumer run asynchronously. in my testing I found the following 1. for 1000 facts at a time and no rules in drl, cpu usage is maintained at 25-30% in my PC(Intel core 2 CPU,2.13 GH,2G RAM) - with no rules in drl, Is this cpu usage acceptable? 2. for 1000 facts at a time and ~60 rules in drl, cpu usage is maintained at 50-60% on the same PC. 3. If I have 1 sec wait between each execution of rules in consumer, then cpu usage is maintained 5% high CPU usage is being big concern to me. Is this expected while using drools? Do others see same cpu usage too? Please share your thoughts. appreciate your input. Thanks -- View this message in context: http://www.nabble.com/high-cpu-usage-tp22691131p22691131.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- View this message in context: http://www.nabble.com/high-cpu-usage-tp22691131p22699498.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Inserting a JRuby object via Spring JRubyScriptFactory in Drools
I read that JBoss AS supports JRuby classes running in the JVM... http://oddthesis.org/posts/2009-03-jboss-rails-1-0-0-beta4-in-time-for-t he-weekend Whilst I haven't used it nor read about it in detail perhaps this is something that might be of interest. With kind regards, Mike From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Edson Tirelli Sent: 19 March 2009 16:06 To: Rules Users List Subject: Re: [rules-users] Inserting a JRuby object via Spring JRubyScriptFactory in Drools Drools always looks for getters/setters, never for the actual internal attribute. As long as you have an instance of a given interface and your rules are written against the interface you should be fine in Drools 5. Drools 4 used shadow facts, so, there would be more considerations to make on drools 4. []s Edson 2009/3/19 Premkumar Stephen pre...@gmail.com Hello Folks, I have been looking at options of using ruby objects as fact objects in Drool's working memory. One obvious way is using services. Another path that I have been researching about is to use Spring as outlined here http://www.jroller.com/habuma/entry/spring_meet_ruby Now, in this example, if the Lime ruby object were like a POJO, (contains fields), will I be able to insert this object into the workingMemory? My Lime interface would have getters and setters. Will the engine look for the fields themselves in an object or can it work with just getters and setters ( as would be declared in the Lime.java interface and defined in the Lime.rb ruby class? Are there any drawbacks in doing it this way? Any comments/pointers will be appreciated. Thanks!! ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Identify Rule on Attributes
I concur everybody's statements fully. The purpose of a rules engine is to remove the need for the application developer to code algorithms to determine which of a set of rules should execute given a set of facts\properties\objects. Drools implements the RETE algorithm. Writing your own code to determine which rule should be executed would be like writing your own video driver so you can display an image. Of course we all assume you plan on using Drools as a rule engine; a black box to drive the execution of consequences based upon rule definitions and domain objects. As you state in your last post below; your point is that [you] want to use rule engine in [your] application at it's fullest. Without a clearer description of your use-case it might be impossible for anybody to give an answer that helps with your particular issue. These forums are an excellent place to find solutions. Everybody has always been extremely helpful to me. I hope you are not discouraged by the responses received to date and am sure everybody is genuinely trying to help. With kind regards, Mike -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Nikhil_dev Sent: 13 March 2009 06:44 To: rules-users@lists.jboss.org Subject: RE: [rules-users] Identify Rule on Attributes Hi Vikrant, Please go through all the post and try understand what i am trying to get from rule engine please do not post just for the namesake. My point is that i want to use rule engine in my application at its fullest, if something is possible in Rule engine i would like to experiment on it. Cheers, Nikhil. Vikrant Yagnick wrote: Hi Nikhil, Drools implements the RETE algorithm. The average rules user does not need to bother or even care about it. All you need to do is use the rule engine(for which you do not need to design or write your own algorithm) and it will automatically do the work for you. Cheers, Vikrant -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Nikhil_dev Sent: Friday, March 13, 2009 11:35 AM To: rules-users@lists.jboss.org Subject: Re: [rules-users] Identify Rule on Attributes from the doc i got what is Rete algo ... but not getting the way to implement it using drools Nikhil_dev wrote: if this is the doc http://downloads.jboss.com/drools/docs/4.0.4.17825.GA/html_single/index. html u are talking about then i coudl'nt find much help. It will be very helpful if u can give me a kick start on the same... since i am just an average rule engine user.some helpful doc on the same Greg Barton wrote: Yes, if you use a rules engine that implements rete the functionality you need is available. Read the Drools docs. Carefully. GreG On Mar 12, 2009, at 23:40, Nikhil_dev k.nik...@verchaska.com wrote: thank u Scott and Greg for u'r reply.. by the way Greg is it possible for me to use this rete algo through rule engine as this functionality already available in the core of Rule Enigne or should i implement this out side rule engine. Greg Barton wrote: That's the core functionality of a rule engine. The rete algorithm does this, and drools implements rete. --- On Thu, 3/12/09, Nikhil_dev k.nik...@verchaska.com wrote: so now is there any way with the help of drools we can identify which rule to execute with out executing all of them one after the another ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users - Regards, :working:Nikhil -- View this message in context: http://www.nabble.com/Identify-Rule-on-Attributes-tp22471473p22490126.ht ml Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users - Regards, :working:Nikhil -- View this message in context: http://www.nabble.com/Identify-Rule-on-Attributes-tp22471473p22490776.ht ml Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users MASTEK LTD. Mastek is in NASSCOM's 'India Top 20' Software Service Exporters List. In the US, we're called MAJESCOMASTEK ~~ Opinions expressed in this e-mail are those of the individual and not that of Mastek Limited, unless specifically indicated to that effect.
RE: [rules-users] Identify Rule on Attributes
Hi Nikhil, Let's break down what you have said into pseudo Drools terms:- Rule 1 AdultFare(value==3000) ChildFare(value==2500) Then //Do what you want to do End Rule 2 ChildFare(value==2000) or InfantFare(value==1500) Then //Do what you want to do End Rule 3 AdultFare($f1 : value) InfantFare($f2 : value) eval($f1 + $f2 4000) Then //Do what you want to do End You suggest you have a RuleBase that has been successfully loaded. You state you have some attributes (I assume these to be implemented as Classes). StatefulSession ss = rulebase.newStatefulSession(); ss.insert( new AdultFare(1000) );//-- Causes object to be compared to ALL rules. This is how RETE works ss.insert( new InfantFare(1000) ); //-- Causes object to be compared to ALL rules. This is how RETE works ss.fireAllRules(); //-- Causes the then part of Rule 3 to execute It sounds like you are trying to hard. With kind regards, Mike -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Nikhil_dev Sent: 13 March 2009 11:19 To: rules-users@lists.jboss.org Subject: RE: [rules-users] Identify Rule on Attributes Thank you Michael, Following is the use-case/example/Situation that i trying to make it work Consider Example Rule 1: requires attributes/Values adultFare == 3000 and ChildFare == 2500 Rule 2: requires attributes/Values ChildFare == 2000 or InfantFare == 1500 Rule 3: requires attributes/Values AdultFare + InfantFare 4000 Above said rules is complied and its Rulebase is stored in the memory.. Now i have adultFare and InfantFare Attribute in hand... so now is there any way with the help of drools we can identify which rule to execute with out executing all of them one after the another...as per the example Rule3 should be executedand will give right output... I hope u got what i am trying to do. let me know weather it is possible through RETE algo used inside drools or should i do it on my own of identifying the rules... Anstis, Michael (M.) wrote: I concur everybody's statements fully. The purpose of a rules engine is to remove the need for the application developer to code algorithms to determine which of a set of rules should execute given a set of facts\properties\objects. Drools implements the RETE algorithm. Writing your own code to determine which rule should be executed would be like writing your own video driver so you can display an image. Of course we all assume you plan on using Drools as a rule engine; a black box to drive the execution of consequences based upon rule definitions and domain objects. As you state in your last post below; your point is that [you] want to use rule engine in [your] application at it's fullest. Without a clearer description of your use-case it might be impossible for anybody to give an answer that helps with your particular issue. These forums are an excellent place to find solutions. Everybody has always been extremely helpful to me. I hope you are not discouraged by the responses received to date and am sure everybody is genuinely trying to help. With kind regards, Mike -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Nikhil_dev Sent: 13 March 2009 06:44 To: rules-users@lists.jboss.org Subject: RE: [rules-users] Identify Rule on Attributes Hi Vikrant, Please go through all the post and try understand what i am trying to get from rule engine please do not post just for the namesake. My point is that i want to use rule engine in my application at its fullest, if something is possible in Rule engine i would like to experiment on it. Cheers, Nikhil. Vikrant Yagnick wrote: Hi Nikhil, Drools implements the RETE algorithm. The average rules user does not need to bother or even care about it. All you need to do is use the rule engine(for which you do not need to design or write your own algorithm) and it will automatically do the work for you. Cheers, Vikrant -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Nikhil_dev Sent: Friday, March 13, 2009 11:35 AM To: rules-users@lists.jboss.org Subject: Re: [rules-users] Identify Rule on Attributes from the doc i got what is Rete algo ... but not getting the way to implement it using drools Nikhil_dev wrote: if this is the doc http://downloads.jboss.com/drools/docs/4.0.4.17825.GA/html_single/index. html u are talking about then i coudl'nt find much help. It will be very helpful if u can give me a kick start on the same... since i am just an average rule engine user.some helpful doc on the same Greg Barton
RE: [rules-users] Identify Rule on Attributes
Furthermore a rulebase can contain rules from many resources (e.g. DRL's). So I guess the cause of your pain is why do you need multiple rulebases!??! -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Scott Reed Sent: 13 March 2009 14:41 To: Rules Users List Subject: Re: [rules-users] Identify Rule on Attributes A RuleBase can contain many rules, not just one. Generally we take all the rules we need for an application and we assemble them into one rulebase, so we don't have to figure out which rulebase to use. Does that help? Nikhil_dev [3/13/2009 8:16 AM] wrote: Perfect this is the situation but the only difference is the last part, Rulebase for all the 3 Rules are stored in memory. Now i have is attributes(implemented as bean class), but the issue is i dont know which Rulebase to use out of the three which is present in the memory, fetching them one by one and executing it individually is possible but a long procedure which i want to avoid.(executing 3 Rule is ok what if i have 10 rules it will be very slow process) ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Inserting collection of facts in rule Consequence
The RHS is just a block of Java, do what you like. There is an implicit variable drools available in the RHS that equates to an instance of KnowledgeHelper. (This was 4.x - Hundson doesn't show a KnowledgeHelper for 5 so I'm guessing things have changed). -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of techy Sent: 09 February 2009 15:14 To: rules-users@lists.jboss.org Subject: Re: [rules-users] Inserting collection of facts in rule Consequence I would appreciate If someone can clarify this. Thanks in advance techy wrote: Hello, Is there way to insert all facts from collection (similar to session.execute(collection)) in the rule consequence ? Thanks! -- View this message in context: http://www.nabble.com/Inserting-collection-of-facts-in-rule-Consequence- tp21814308p21914860.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Java Bean dependency
Do you mean object classes that represent DRL or objects that DRL operate upon (i.e. Facts)? Facts are simply POJO's and therefore IMO any mechanism that can deserialise into a POJO should suffice. You could also look into the use of JNI for the interface between C++ and Drools. With kind regards, Mike From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Sachin Mangal Sent: 06 February 2009 07:13 To: rules-users@lists.jboss.org Subject: [rules-users] Java Bean dependency Hi, I want to use Drools as a part of a classification system which consist of Machine Learning based classification (semi supervised) followed by an expert system (rule based classification). The issue is that ML part and the framework is in C++ and Drools supports Java. So, I will use some IPC mechanism for sending data objects from framework to the rule system (I have my own serialization and deserialization modules for that). I just want to know that the object classes correspoding to DRLs need to be in some special format or any format with getter and setter methods will do? Thanks in advance, Sachin Mangal Member of Research Staff, Guavus Network Systems Pvt Ltd ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] one question about asserting facts
Hello,
Unless the Drools team have a secret optimisation *I think* there is
no other way to insert large numbers of facts.
Think about it; every fact you insert will need to be propagated through
the RETE network in order for the correct rules to be activated.
You could however optimise your rules to ensure the facts are processed
as efficiently as possible. For example if you are interested in
DataClasses where line is not empty you should have the RHS pattern
that checks for this before other RHS patterns in rules. This should
ensure the fact is not propagated through the network further than is
really necessary. I believe Drools does this itself when the RETE
network is built by have specialised Object nodes that filter out
classes you have not consumed in RHS patters (so if you insert a Foo
class into WM and your rules only use Bar classes the Foo class does not
propagate further).
With kind regards,
Mike
-Original Message-
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Senlin Liang
Sent: 05 February 2009 20:06
To: rules-users@lists.jboss.org
Subject: [rules-users] one question about asserting facts
Hi all,
I am trying to assert (or insert) a large number of facts (or
DataClass objects) in to a session, what i am doing right now is to
insert them one by one as
-
while (line != null) {
str = bufRead.readLine();
session.insert(new DataClass(line, str));
line = bufRead.readLine();
}
-
My question: is there an efficient way to insert all facts at once, so
that it takes less time?
Thanks,
Senlin
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RE: [rules-users] Parsing XML using Drools
It is not clear how you want to use the XML?
If the XML represents Facts then you could use a worker Fact and FROM
to deserialise them and make them available to WM. For example:-
rule get some XML facts
when
$w : Worker()
Cheese( ) from $w.getCheesesFromXML();
then
//Do something with cheese
end
Obviously the XML need not be true serialised objects (in a JAXB sense)
but simply the properties that getCheeseFromXML rehydrates.
Drools is not exposing any of the XML libraries; they are merely used by
your code. The above would be (partially) equivalent to:-
Worker w = new Worker();
ListCheese cheeses = w.getCheesesFromXML();
for(Cheese c : cheeses) {
wm.insert(c);
}
rule Cheese pre-loaded
when
Cheese( )
then
//Do something with cheese
end
Partially equivalent as you could retract Cheese( ) in the second way
which would affect truth maintenance whereas the first way would (I
believe) not.
With kind regards,
Mike
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Gupta, Ankit
(Ankit)
Sent: 29 January 2009 07:22
To: rules-users@lists.jboss.org
Subject: [rules-users] Parsing XML using Drools
Hi All,
How can we read and parse a XML file using drools ?
Does Drools support the SAX or DOM parsing .
Regards
Ankit
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RE: [rules-users] Working with dates in rules
Hi, I wonder whether Drools 5 Complex Event Processing Support (Temporal Reasoning) might be what you're looking for? http://blog.athico.com/2008/07/drools-50-m1-new-and-noteworthy.html With kind regards, Mike From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of David Siefert Sent: 29 January 2009 09:40 To: Rules Users List Subject: [rules-users] Working with dates in rules Hi- I'm wondering how it would be possible to compare a part of a date in the lhs condition of a rule in a Drool. In other words, I need to compare a date to see if it is x days from the current date, n hours from current time, etc. Would anyone be kind enough to provide an example? I'm thinking I may have to implement something of my own to offer that functionality? Big thanks, David ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
FW: [rules-users] Parsing XML using Drools
Received from Anit, which might help others comment
From: Gupta, Ankit (Ankit) [mailto:gupt...@avaya.com]
Sent: 29 January 2009 10:04
To: Anstis, Michael (M.)
Subject: RE: [rules-users] Parsing XML using Drools
Hi Mike,
Thanks for prompt reply ,
Actually right now I am streaming the xml
BenchmarkResultsFor
BenchmarkDataProcessing/Benchmark
Workload1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16/Workload
Memory4, 4, 4, 8, 8, 12, 12, 16, 24, 24, 24, 24, 24, 24,
24, 24/Memory
/BenchmarkResultsFor
here we are using apache math api for interpolation
public MemoryBenchmarkResult(String name, double[] x, double[]
y) {
this.hostFunction = name;
// Create the interpolation function
SplineInterpolator i1 = new SplineInterpolator();
this.workload = x;
this.memory = y;
this.interpolator = i1.interpolate(this.workload, this.memory);
}
here we are passing the values of X Axis (Workload) and we get
the values of Y Axis (Memory ). Reading or Streaming of this XML are
doing using SAX .
This thing I want to do with Drools .. as I know XML
Streaming is possible in Drools .
Regards
Ankit
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Anstis,
Michael (M.)
Sent: Thursday, January 29, 2009 2:48 PM
To: Rules Users List
Subject: RE: [rules-users] Parsing XML using Drools
It is not clear how you want to use the XML?
If the XML represents Facts then you could use a worker Fact and
FROM to deserialise them and make them available to WM. For example:-
rule get some XML facts
when
$w : Worker()
Cheese( ) from $w.getCheesesFromXML();
then
//Do something with cheese
end
Obviously the XML need not be true serialised objects (in a JAXB
sense) but simply the properties that getCheeseFromXML rehydrates.
Drools is not exposing any of the XML libraries; they are merely
used by your code. The above would be (partially) equivalent to:-
Worker w = new Worker();
ListCheese cheeses = w.getCheesesFromXML();
for(Cheese c : cheeses) {
wm.insert(c);
}
rule Cheese pre-loaded
when
Cheese( )
then
//Do something with cheese
end
Partially equivalent as you could retract Cheese( ) in the
second way which would affect truth maintenance whereas the first way
would (I believe) not.
With kind regards,
Mike
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Gupta, Ankit
(Ankit)
Sent: 29 January 2009 07:22
To: rules-users@lists.jboss.org
Subject: [rules-users] Parsing XML using Drools
Hi All,
How can we read and parse a XML file using
drools ?
Does Drools support the SAX or DOM parsing .
Regards
Ankit
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RE: [rules-users] Parsing XML using Drools
I am not sure on what you are trying to achieve.
Drools is a Rule Engine and not a XML parser; the nearest I could find
to what you are reporting (I know XML Streaming is possible in Drools)
is the following.
http://netzooid.com/blog/2007/03/16/sxc-simple-xml-compiler-jaxb-runtime
-streaming-xpath-implementation-and-more/
Can you enlighten me with your knowledge of XML Streaming in Drools?
From: Gupta, Ankit (Ankit) [mailto:gupt...@avaya.com]
Sent: 29 January 2009 10:04
To: Anstis, Michael (M.)
Subject: RE: [rules-users] Parsing XML using Drools
Hi Mike,
Thanks for prompt reply ,
Actually right now I am streaming the xml
BenchmarkResultsFor
BenchmarkDataProcessing/Benchmark
Workload1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16/Workload
Memory4, 4, 4, 8, 8, 12, 12, 16, 24, 24, 24, 24, 24, 24,
24, 24/Memory
/BenchmarkResultsFor
here we are using apache math api for interpolation
public MemoryBenchmarkResult(String name, double[] x, double[]
y) {
this.hostFunction = name;
// Create the interpolation function
SplineInterpolator i1 = new SplineInterpolator();
this.workload = x;
this.memory = y;
this.interpolator = i1.interpolate(this.workload, this.memory);
}
here we are passing the values of X Axis (Workload) and we get
the values of Y Axis (Memory ). Reading or Streaming of this XML are
doing using SAX .
This thing I want to do with Drools .. as I know XML
Streaming is possible in Drools .
Regards
Ankit
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Anstis,
Michael (M.)
Sent: Thursday, January 29, 2009 2:48 PM
To: Rules Users List
Subject: RE: [rules-users] Parsing XML using Drools
It is not clear how you want to use the XML?
If the XML represents Facts then you could use a worker Fact and
FROM to deserialise them and make them available to WM. For example:-
rule get some XML facts
when
$w : Worker()
Cheese( ) from $w.getCheesesFromXML();
then
//Do something with cheese
end
Obviously the XML need not be true serialised objects (in a JAXB
sense) but simply the properties that getCheeseFromXML rehydrates.
Drools is not exposing any of the XML libraries; they are merely
used by your code. The above would be (partially) equivalent to:-
Worker w = new Worker();
ListCheese cheeses = w.getCheesesFromXML();
for(Cheese c : cheeses) {
wm.insert(c);
}
rule Cheese pre-loaded
when
Cheese( )
then
//Do something with cheese
end
Partially equivalent as you could retract Cheese( ) in the
second way which would affect truth maintenance whereas the first way
would (I believe) not.
With kind regards,
Mike
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Gupta, Ankit
(Ankit)
Sent: 29 January 2009 07:22
To: rules-users@lists.jboss.org
Subject: [rules-users] Parsing XML using Drools
Hi All,
How can we read and parse a XML file using
drools ?
Does Drools support the SAX or DOM parsing .
Regards
Ankit
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RE: [rules-users] Working with dates in rules
Hi David, Sorry it was of little help. A rule of thumb is to stay away from eval as it kills performance (the patterns can't be indexed). I'm not sure if Drools can handle Date variables (the docs state it handles Data literals formatted as dd-mmm- so Cheese( date == 27-Oct-2008) works). I guess you could look at something like this (gees, this is going to show how green I am with Drools now):- rule yuck when DateFactory($today : today ) $c : CreditCard( $expires : expirationDate ) ArrayList( size = 0 ) from collect( Day( date = $today, date = $expires )) then //Difference between today and expiry date is more than zero days end This does require the insertion of (possibly) huge amounts of Day facts. Yuck. There must be a better way (in fact your eval looks s much cleaner). I'm just throwing out ideas. Good luck with your adventures with Drools. Mike From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of David Siefert Sent: 29 January 2009 11:31 To: Rules Users List Subject: Re: [rules-users] Working with dates in rules Not sure--Drools 5 temporal reasoning looks like it would be the answer. Only problem is that I need a solution now, so I am stuck with Drools 4. This did give me some ideas though. I created myself a class called TemporalReasoner. This has a few methods, namely to roll a date (so I can tell it x amount of time from now), and then compare it to another date. So in my rule, lets say I have a fact CreditCard with property expiration:Date (speaking uml-ishly for a property named 'expiration' of type Date): rule Fires when expiration less than today when $c: CreditCard($expires : expirationDate) eval(new TemporalReasoner(Calendar.getInstance()).lessThan($expires)) then // do something for when credit card is still valid end Now, I'm still generally a noob with BRs, so I'm not sure how this will affect performance. Any advice? Thanks, David On Thu, Jan 29, 2009 at 3:50 AM, Anstis, Michael (M.) manst...@ford.com wrote: Hi, I wonder whether Drools 5 Complex Event Processing Support (Temporal Reasoning) might be what you're looking for? http://blog.athico.com/2008/07/drools-50-m1-new-and-noteworthy.html With kind regards, Mike From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of David Siefert Sent: 29 January 2009 09:40 To: Rules Users List Subject: [rules-users] Working with dates in rules Hi- I'm wondering how it would be possible to compare a part of a date in the lhs condition of a rule in a Drool. In other words, I need to compare a date to see if it is x days from the current date, n hours from current time, etc. Would anyone be kind enough to provide an example? I'm thinking I may have to implement something of my own to offer that functionality? Big thanks, David ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Working with dates in rules
You got it. You won't find this proposal in any pattern books!! ;-) At least you understood the syntax, so you can now officially consider yourself not a noob. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of David Siefert Sent: 29 January 2009 12:59 To: Rules Users List Subject: Re: [rules-users] Working with dates in rules Ah! Sorry, I believe you were saying Day is a fact that I would have to create for each likely day The collect operation is what gathers all those (Day) facts into a list that is counted. so the rule fires if there is more than 0 day facts. My bad! Thanks, David On Thu, Jan 29, 2009 at 6:53 AM, David Siefert siefert.david.mailingl...@gmail.com wrote: Hey, that was quite clever. Where can I find more about Day()? I did some research about DateFactory which I can see how dates get parsed according to the documentation, as well as compared with the conditional operators (, , =, =, etc). Thanks, David On Thu, Jan 29, 2009 at 5:57 AM, Anstis, Michael (M.) manst...@ford.com wrote: Hi David, Sorry it was of little help. A rule of thumb is to stay away from eval as it kills performance (the patterns can't be indexed). I'm not sure if Drools can handle Date variables (the docs state it handles Data literals formatted as dd-mmm- so Cheese( date == 27-Oct-2008) works). I guess you could look at something like this (gees, this is going to show how green I am with Drools now):- rule yuck when DateFactory($today : today ) $c : CreditCard( $expires : expirationDate ) ArrayList( size = 0 ) from collect( Day( date = $today, date = $expires )) then //Difference between today and expiry date is more than zero days end This does require the insertion of (possibly) huge amounts of Day facts. Yuck. There must be a better way (in fact your eval looks s much cleaner). I'm just throwing out ideas. Good luck with your adventures with Drools. Mike From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of David Siefert Sent: 29 January 2009 11:31 To: Rules Users List Subject: Re: [rules-users] Working with dates in rules Not sure--Drools 5 temporal reasoning looks like it would be the answer. Only problem is that I need a solution now, so I am stuck with Drools 4. This did give me some ideas though. I created myself a class called TemporalReasoner. This has a few methods, namely to roll a date (so I can tell it x amount of time from now), and then compare it to another date. So in my rule, lets say I have a fact CreditCard with property expiration:Date (speaking uml-ishly for a property named 'expiration' of type Date): rule Fires when expiration less than today when $c: CreditCard($expires : expirationDate) eval(new TemporalReasoner(Calendar.getInstance()).lessThan($expires)) then // do something for when credit card is still valid end Now, I'm still generally a noob with BRs, so I'm not sure how this will affect performance. Any advice? Thanks, David On Thu, Jan 29, 2009 at 3:50 AM, Anstis
RE: [rules-users] Human Task
Hi, A Swim lane is a term associated with UML Activity diagrams where the activities undertaken by certain actors are grouped into lanes. Here's the first Google result I found... http://www.jiscinfonet.ac.uk/InfoKits/process-review/process-review-9.5 With kind regards, Mike From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of raphael.bernh...@orange-ftgroup.com Sent: 29 January 2009 13:04 To: rules-users@lists.jboss.org Subject: RE: [rules-users] Human Task I have an additional question... I'm unable to understand the term swinlanes: it does not exist in my English- French Harrap's version ;-) May you give me some synonyms or any translation if someone knows one. -- Raphaël BERNHARD --- mailto:raphael.bernh...@orange-ftgroup.com Orange LABS 905, Rue Albert Einstein 06921 SOPHIA ANTIPOLIS Cedex Tel: (+33) 4 92 94 52 94 Fax: (+33) 4 92 38 93 20 De : rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] De la part de Mark Proctor Envoyé : jeudi 29 janvier 2009 00:59 À : Rules Users List Objet : Re: [rules-users] Human Task Femke De Backere wrote: Hi! Can somebody give me some more information on the Human Task in the ruleflow and the use of Apache Mina with it. The drools-docs-flow.pdf (https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/docs/drools-flow/html/ch09.html) https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/docs/drools-flow/html/ch09.html%29 was interesting, but is still missing a few parts. best place to look is with the unit tests: http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-process/drools-process-task/src/test/java/org/drools/task/service/ This one is a good starting point. http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-process/drools-process-task/src/test/java/org/drools/task/service/TaskLifeCycleTest.java Thx! Femke ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Run a set of rules in a group B from a rule in a group A
Please accept that my knowledge is based on 4.x and there might be other alternatives in 5. Rules are not ran but their patterns (LHS) evaluated as facts (objects) are inserted into Working Memory. When all patterns in the LHS of a rule are matched activations are placed on the agenda for execution of the consequence (RHS) when fireAllRules() is called (or other mechanisms to run what is on the agenda are invoked; such as RuleFlow). So you could have rules in Group A cause Group B to receive the focus but it is the RHS's execution order you control and not the pattern matching - which will happen for Group A and Group B when facts are inserted into WM. Look at Agenda Groups and RuleFlow. This should help. With kind regards, Mike -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Thierry B Sent: 21 January 2009 10:48 To: rules-users@lists.jboss.org Subject: [rules-users] Run a set of rules in a group B from a rule in a group A Hello, Is it possible to run a rule from a group A, and if conditions of that rule are satisfied that in consequence to tell Drools to run rules of a group B ? And if it's possible, how to do that? Thanks :-) -- View this message in context: http://www.nabble.com/Run-a-set-of-rules-in-a-group-B-from-a-rule-in-a-g roup-A-tp21580767p21580767.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Run a set of rules in a group B from a rule in agroup A
Hi, See below. executing a rule is really two parts: LHS pattern matching (which can't be stopped for a given RuleBase) and execution of the RHS (which can be controlled by the agenda and truth maintenance). I hope my time away hasn't led to me giving wrong advice. Mike -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Thierry B Sent: 21 January 2009 12:53 To: rules-users@lists.jboss.org Subject: RE: [rules-users] Run a set of rules in a group B from a rule in agroup A Hello, So if I've well understand : - before calling fireAllRules(), Drools know for all rules (from any group) definied in DRL files, those which all patterns in the LHS of a rule are matched, and those rules are placed on a agenda. At which moment exactly, Drools verified from a rule that all of its pattern in the LHS are matched, if it's before callling fireAllRules() ? Yes, LHS is evaluated on workingMemory.insert(o). A call to fireAllRules() executes the activations on the agenda (i.e. RHS queued as a consequence of LHS being matched on workingMemory.insert(o)). - And fireAllRules() permit to execute all rules that are placed on agenda Yes - When using setFocus() from a java class or a rule, we can control the order of rules to specify to execute rules from group B, and group C... I believe so. - So it's not possible to tell Drools that we don't want to execute a group of rules if a rule A is not matched : in that group of rules : those which all paterns match LHS will be inevitably executed. Wrong. The rules won't be executed (read as activations - RHS - won't be run) but you can't stop the LHS being evaluated. All these points that I said, are exact? Thanks :-) Anstis, Michael (M.) wrote: Please accept that my knowledge is based on 4.x and there might be other alternatives in 5. Rules are not ran but their patterns (LHS) evaluated as facts (objects) are inserted into Working Memory. When all patterns in the LHS of a rule are matched activations are placed on the agenda for execution of the consequence (RHS) when fireAllRules() is called (or other mechanisms to run what is on the agenda are invoked; such as RuleFlow). So you could have rules in Group A cause Group B to receive the focus but it is the RHS's execution order you control and not the pattern matching - which will happen for Group A and Group B when facts are inserted into WM. Look at Agenda Groups and RuleFlow. This should help. With kind regards, Mike -- View this message in context: http://www.nabble.com/Run-a-set-of-rules-in-a-group-B-from-a-rule-in-a-g roup-A-tp21580767p21582595.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] M2: What Revision?
I unwrapped my Christmas present early to find that the image links in the documentation are unfortunately broken in the downloads. I haven't tried from SVN. :-( For example file:///C:/etirelli/workspace/jboss/jbrules-trunk/drools-docs/drools-doc s-guvnor/en/Chapter-Guvnor/NewMainScreen.png Obviously not critical to the function! From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Edson Tirelli Sent: 30 September 2008 03:37 To: Rules Users List Subject: Re: [rules-users] M2: What Revision? It is up: http://www.jboss.org/drools/downloads.html We will publish the release notes soon. []s Edson 2008/9/29 Mark Proctor [EMAIL PROTECTED] Steve Nunez wrote: Gentlemen, What revision was finally 'blessed' as M2? We'd like to build ourselves and begin testing sooner rather than later. http://anonsvn.labs.jboss.com/labs/jbossrules/tags/5.0.0.23197.MR2/ Edson is uploading the binary artifacts as we speak, a maven bug in the release proces has held him up that we couldn't fix, so after a day or so of that he is uploading by hand. Regards, - SteveN This message was sent using IMP, the Internet Messaging Program. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Update vs insert
What version of Drools are you using? Pre-5 has Shadow Facts so you can't rely upon pass-by-reference. I believe 5 has had Shadow Facts removed. Insert places a new object into WM whereas update refreshes (the shadow) of an existing one. I would expect you to have to use update in your example:- rule Add person to math class no-loop when person : Person(likesMath == true) then person.setClassName(Math); update(person); end rule And now, time for something completely different no-loop when person : Person(likesMath == true) then PreferredClass p = new PreferredClass(Math); p.setPerson(person); insert(p); end Cheers, Mike From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Shyam, Pallav (MSCIBARRA) Sent: 11 September 2008 11:40 To: rules-users@lists.jboss.org Subject: Re: [rules-users] Update vs insert Very strange. The facts are passed into the WM by-reference. Therefore the query should work after calling the person.setClassName(Math) on the fact. And this should work without calling the insert or update. This leaves me guessing that the query does not work on the facts directly, instead they work on shadow facts. From: [EMAIL PROTECTED] To: Rules Users List Sent: Thu Sep 11 04:41:37 2008 Subject: [rules-users] Update vs insert Hello, What is the difference between calling insert and update in a rule file? When I use insert my queries don't work, but if I use update they seem to. I don't mind using update, but I would like to understand the difference between the two. Here is my rule file. rule Add person to math class no-loop when person : Person(likesMath == true) then person.setClassName(Math); insert(person); end I also have a query: query getPeopleForClass(String _className) Person(className == _className) end When I add two facts to working memory, where the likesMath attribute is true, then run my query I get zero results back. When I change the rule, Add person to math class, to use update(person) instead of insert(person) two students are returned. Any help would be appreciated. Thanks, Dan Daniel Quinn Fedex - Custom Critical Software Specialist I 234.310.4090(x2586) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, September 10, 2008 2:27 PM To: rules-users@lists.jboss.org Subject: [rules-users] Re: looping problem Hello, thanks that works. I just forgot to set the focus in the init rule.. Regards Thomas ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users https://lists.jboss.org/mailman/listinfo/rules-users NOTICE: If received in error, please destroy and notify sender. Sender does not intend to waive confidentiality or privilege. Use of this email is prohibited when received in error. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] getting latest date
You might need to add the MemberDataRecords into WM and use not exists when $d : Data() $mdr : MemberDataRecord( $d1 : loggedInDate ) not exists MemberDataRecord ( loggedInDate $d1 ) then //Smurf end From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kapila Silwathge Sent: 11 September 2008 13:09 To: Rules Users List Subject: Re: [rules-users] getting latest date yeah.i did the same with following code // $d : Data($memDataRecods :memberDataRecords ) $mdr : MemberDataRecord($loggedindate:logged_in_date )from $memDataRecods not MemberDataRecord( logged_in_date $loggedindate ) // when what happened was it iterates over earch memDataRecods in decending order what i need is to get only the very first record... - Original Message - From: Shyam, Pallav (MSCIBARRA) mailto:[EMAIL PROTECTED] To: rules-users@lists.jboss.org Sent: Thursday, September 11, 2008 5:09 PM Subject: Re: [rules-users] getting latest date rule when m : MemberDataRecords( d : loggedInDate) from Data( ) and not MemberDataRecords( loggedInDate d) from Data( ) then end From: [EMAIL PROTECTED] To: rules-users@lists.jboss.org Sent: Thu Sep 11 19:05:22 2008 Subject: [rules-users] getting latest date HI all. I am inserting an Obect from a class called Data() to the working memory Data object has a Collection (ArrayList) of Objects from a class called MemberDataRecords() MemberDataRecords object has a field called loggedInDate of type Date()(Accually SimpleDate a subclass of java util date()) how can i get MemberDataRecords object which contain the last loggedInDate Kapila Silwathge NOTICE: If received in error, please destroy and notify sender. Sender does not intend to waive confidentiality or privilege. Use of this email is prohibited when received in error. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Java code Vs Drools
Why not add your ArrayList items individually into WM? rule P1 110 salience 1 activation-group 1 when PriorityType( pricetype == 10,20,30,40,110 ) t:TlbObjectAttributeData( lngAttrTypeId == 110 ) then result.add(t); end Would this not give the same result and give you the indexing Mark has commented upon? Cheers, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Harsh Jetly Sent: 13 August 2008 10:03 To: rules-users@lists.jboss.org Subject: [rules-users] Java code Vs Drools I have been evaluating the rule engine (ie Drools 4.0.4). I have created an application which has about 20 rules . I insert about 500 arraylists into the working memory and each arraylist contains about 4 objects. The rule engine picks the object that is the best match from the arraylist and stores it . This processing takes about 0.953 secs . Now this very same scenario I have implemented in using java code (if ..else)...it takes about 0.016secs . I was expecting the rule engine to give a better performance. Considering the use of alpha node caching and other factors of the rete algorithm. This is how one of the rules look in the rule file : rule P1 110 salience 1 activation-group 1 when PriorityType( pricetype == 10,20,30,40,110 ) list :ArrayList( ) t:TlbObjectAttributeData( lngAttrTypeId == 110 ) from list then result.add(t); end Am I doing something wrong or this application is not harnessing the pluses of the rule engine . If so can you please tell me which kind of application should I build to highlight the performance of a rule engine . Appreciate it Regards Harsh Jetly SOA Center of Excellence __ ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Fetching values of an object's attribute setbydifferent rules
Globals don't pass down the RETE network and so Drools won't try to pass them down the network (although if the Class you insert is not used in any LHS patterns it will probably be filtered out at the top of the network by a ObjectTypeNode) so they might offer (insignificantly) faster performance. Also to insert a fact and retrieve later it'd be a good idea to hang onto the FactHandle... Not much in it (I think), just personal preference. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of psentosa Sent: 12 August 2008 11:26 To: rules-users@lists.jboss.org Subject: RE: [rules-users] Fetching values of an object's attribute setbydifferent rules yup, that's what I'm planing to use now. Now that you mentioned it, is there any advantage of using the list as global over using it by just inserting it normally (session.insert)? Again, really appreciate your answers a lot!Thanks Paul Anstis, Michael (M.) wrote: OK, so here is my take on things:- +--+ ++ +---+ | | || | | | Sub-system 1 |--| Sub-system 2 |--| Sub-system 3 uses | | sets up data | | Rules \ Drools | | results from sub- | +--+ || | system 2 | ++ +---+ I would be inclined to have ListWashRuleValueHolder as a global in WM and append instances of WashRuleValueHolder to the list in RHS of rules (or a Map or something so you can retrieve what you want easily). Also have you looked at StatelessSession.executeWithResults() - which I haven't personally used but would give you what (I think) you need (if stateless is acceptable too!). Cheers, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of psentosa Sent: 12 August 2008 09:45 To: rules-users@lists.jboss.org Subject: Re: [rules-users] Fetching values of an object's attribute set bydifferent rules Thank you Mike and Kris for the answer. So I'll give it a try again to explain :) The rules I described have information that I need to go further with my application, i.e. with the wash example, when rule A fires, it'll give information about the washing instruction regarding the temperature and detergent. Now, let's say, I have another block of codes apart from this RE-part, which needs those information (.e.g a WashMachine Object). These info should only be defined within the rules. So my question before was, how can I pass those to my washMachine? That's why idea was to insert a new/empty value holder, set the value to the holder when the rule fire, and I can use the value holder (which already contains value/has info from the fired rules). I'm not sure if using such a ValueHolder is the best way to fetch some values set within the rules. I hope this is clearer now, and any idea would be great! Thanks in advance Paul psentosa wrote: Hi, I have the following problems: I need to prove an object based on certain rules, where the parts of the rules should be kept to be used in further process within my application. In order to fetch those parts, my idea was to insert an additional object as value holder for the rule's parts, put values on them when the corresponding rule is fired, so that later on I can process those value holder after my appl gets the control back from Ruleengine. The example below: Shirt shirt = new Shirt(...) WashRuleValueHolder holder = new WashRuleValueHolder(); session.insert(shirt); session.insert(holder); .. session.dispose() System.out.println(holder.getTemperature()); System.out.println(holder.getDetergent()); === rule A when Shirt (dirtinessLevel == high) $holder : WashRuleValueHolder() then System.out.println (this cloth should be washed in 60 degree water with 1 spoon of detergent) $holder.temperature = 60; $holder.detergent = 1; rule B when Shirt(material == satin) $holder : WashRuleValueHolder() then System.out.println (this cloth should be washed in 30 degree water with 0,5 spoon of detergent) $holder.temperature = 30; $holder.detergent = 0,5; Now, in case both rules evaluate to true, I'd have problem with my valueholder, bcs depending on which one of the rules was fired latest, that'd be the value I got from the holder, and I need both of them. So, my questions: - Is using such a value holder a good solution to fetch the rules' value? Or is there any better solution? - How to handle this problem of multiple value association to the holder, so I still can get all the values without one overwriting the other and they are still connected? Any idea highly appreciated, thanks in advance! -- View this message in context: http://www.nabble.com/Fetching
RE: [rules-users] Use of a DAO in LHS
Hi Jean-Baptiste, Here is a good (complete) example you can try following: http://www.redhatmagazine.com/2008/07/11/jboss-drools-meets-hibernate/ With kind regards, Mike From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of BINET JEAN-BAPTISTE Sent: 11 August 2008 08:06 To: Rules Users List Subject: RE: [rules-users] Use of a DAO in LHS On the contrary of what you said I read the documentation. And there is this sentence : The next example shows how we can reason over the results of a hibernate query. The Restaurant pattern will reason over and bind with each result in turn: but after there is no example I already tried to use the from keyword but I didn't succeed in writting a good syntax. So, that's why I ask the question. The only thing I succeed in is to write a function which uses my dao to do SQL query.Then I call this function with eval in the LHS. But how to use the from keyword ??? BR Jean-Baptiste De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de Anstis, Michael (M.) Envoyé : vendredi 8 août 2008 17:36 À : Rules Users List Objet : RE: [rules-users] Use of a DAO in LHS I suspect you may not have read the documentation. Take a look at the from keyword. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of BINET JEAN-BAPTISTE Sent: 08 August 2008 16:01 To: rules-users@lists.jboss.org Subject: [rules-users] Use of a DAO in LHS Hello, I have a DRL file in which I have a global variable representing a DAO. So, I succeed in writting a rule which uses this DAO to run a SQL query on the database from the RHS part. But now, I would like to use my DAO in the LHS, I mean I want to fire my rule only if a condition is ok on the result of my SQL query. Is it possible to call a method of my DAO in the LHS part ? I have not found an example. Thanks. Regards, Jean-Baptiste ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Fetching values of an object's attribute set bydifferent rules
Hi psentosa, I don't fully understand what you require, but won't using a List of WashRuleMatches provide what you need? rule A when $s : Shirt (dirtinessLevel == high) $holder : WashRuleValueHolder() Then System.out.println (this cloth should be washed in 60 degree water with 1 spoon of detergent) WashRuleMatch m = new WashRuleMatch(); m.setTemperature(60); m.setDetergent(1); m.setShirt($s); $holder.add(m); //insertLogical(m); rule B when $s : Shirt(material == satin) $holder : WashRuleValueHolder() then System.out.println (this cloth should be washed in 30 degree water with 0,5 spoon of detergent) WashRuleMatch m = new WashRuleMatch(); m.setTemperature(30); m.setDetergent(0.5); m.setShirt($s); $holder.add(m); //insertLogical(m); Do you need only one WashRuleValueHolder for each shirt? [WashRuleValueHolder setup by rules] rule A1.0 when $s : Shirt (dirtinessLevel == high) not WashRuleValueHolder(shirt == $s) Then WashRuleValueHolder wrvh = new WashRuleValueHolder($s); insertLogical(wrvh); rule A1.1 when $s : Shirt (dirtinessLevel == high) $holder : WashRuleValueHolder(shirt == $s) Then System.out.println (this cloth should be washed in 60 degree water with 1 spoon of detergent) WashRuleMatch m = new WashRuleMatch(); m.setTemperature(60); m.setDetergent(1); m.setShirt($s); $holder.add(m); //insertLogical(m); Etc... With kind regards, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of psentosa Sent: 11 August 2008 10:04 To: rules-users@lists.jboss.org Subject: [rules-users] Fetching values of an object's attribute set bydifferent rules Hi, I have the following problems: I need to prove an object based on certain rules, where the parts of the rules should be kept to be used in further process within my application. In order to fetch those parts, my idea was to insert an additional object as value holder for the rule's parts, put values on them when the corresponding rule is fired, so that later on I can process those value holder after my appl gets the control back from Ruleengine. The example below: Shirt shirt = new Shirt(...) WashRuleValueHolder holder = new WashRuleValueHolder(); session.insert(shirt); session.insert(holder); .. session.dispose() System.out.println(holder.getTemperature()); System.out.println(holder.getDetergent()); === rule A when Shirt (dirtinessLevel == high) $holder : WashRuleValueHolder() then System.out.println (this cloth should be washed in 60 degree water with 1 spoon of detergent) $holder.temperature = 60; $holder.detergent = 1; rule B when Shirt(material == satin) $holder : WashRuleValueHolder() then System.out.println (this cloth should be washed in 30 degree water with 0,5 spoon of detergent) $holder.temperature = 30; $holder.detergent = 0,5; Now, in case both rules evaluate to true, I'd have problem with my valueholder, bcs depending on which one of the rules was fired latest, that'd be the value I got from the holder, and I need both of them. So, my questions: - Is using such a value holder a good solution to fetch the rules' value? Or is there any better solution? - How to handle this problem of multiple value association to the holder, so I still can get all the values without one overwriting the other and they are still connected? Any idea highly appreciated, thanks in advance! -- View this message in context: http://www.nabble.com/Fetching-values-of-an-object%27s-attribute-set-by- different-rules-tp18922201p18922201.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Fetching values of an object's attribute setbydifferent rules
Hi Paul,
What about subclassing List and adding a type attribute?
class MyArrayList extends ArrayList {
private String type;
public String getType() {
return type;
}
}
Rule smurf
when
$l : MyArrayList( type == 'shirt' )
...
then
...
end
Still not understanding your requirement but happy to keep punting ideas
until you get the spark.
Cheers,
Mike
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of psentosa
Sent: 11 August 2008 14:48
To: rules-users@lists.jboss.org
Subject: RE: [rules-users] Fetching values of an object's attribute
setbydifferent rules
Hi Mike,
thanks for the reply.
Actually for each object I check, depending on how many rules are
activated,
I'd need so many value holder too.
So, each value holder actually contains information about each activated
rule (e.g. regarding the temperature and detergent.
But thank you for the keyword LIST. I think, instead of using 2 level
(i.e.
Value Holder and the Match-objects, I could use
session.insert(ListValueHolder), and for every activated rule, in THEN
part I'll create a new ValueHolder, set its values, and add it to the
list.
But another question to this:
How can I insert 2 different kind of lists, and refer to them?
I saw that ListMyClass() can't be used, and only List() is possible
when
$wash : List()
$shirt : List()
then
$wash.add(new Wash..())
$shirt.add(new Shirt())
Can RE find the correct list to add the objet? Or how should I do this?
Again, thanks in advance :)
Paul
Hi psentosa,
I don't fully understand what you require, but won't using a List of
WashRuleMatches provide what you need?
rule A
when
$s : Shirt (dirtinessLevel == high)
$holder : WashRuleValueHolder()
Then
System.out.println (this cloth should be washed in 60 degree
water with 1 spoon of detergent)
WashRuleMatch m = new WashRuleMatch();
m.setTemperature(60);
m.setDetergent(1);
m.setShirt($s);
$holder.add(m);
//insertLogical(m);
rule B
when
$s : Shirt(material == satin)
$holder : WashRuleValueHolder()
then
System.out.println (this cloth should be washed in 30 degree
water with 0,5 spoon of detergent)
WashRuleMatch m = new WashRuleMatch();
m.setTemperature(30);
m.setDetergent(0.5);
m.setShirt($s);
$holder.add(m);
//insertLogical(m);
Do you need only one WashRuleValueHolder for each shirt?
[WashRuleValueHolder setup by rules]
rule A1.0
when
$s : Shirt (dirtinessLevel == high)
not WashRuleValueHolder(shirt == $s)
Then
WashRuleValueHolder wrvh = new WashRuleValueHolder($s);
insertLogical(wrvh);
rule A1.1
when
$s : Shirt (dirtinessLevel == high)
$holder : WashRuleValueHolder(shirt == $s)
Then
System.out.println (this cloth should be washed in 60 degree
water with 1 spoon of detergent)
WashRuleMatch m = new WashRuleMatch();
m.setTemperature(60);
m.setDetergent(1);
m.setShirt($s);
$holder.add(m);
//insertLogical(m);
Etc...
With kind regards,
Mike
--
View this message in context:
http://www.nabble.com/Fetching-values-of-an-object%27s-attribute-set-by-
different-rules-tp18922201p18926194.html
Sent from the drools - user mailing list archive at Nabble.com.
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RE: [rules-users] Decision table not triggering
I think you might need to post more of your source if possible. Where are you setting PoolInfo.daysBeforeSummons to 5, outside WM and before fireAllRules or within the RHS of another rule? Thanks, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hehl, Thomas Sent: 07 August 2008 21:41 To: 'Rules Users List' Subject: RE: [rules-users] Decision table not triggering Nope. Only one of each. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Greg Barton Sent: Thursday, August 07, 2008 4:33 PM To: Rules Users List Subject: Re: [rules-users] Decision table not triggering Is there more than one PoolInfo object in working memory? If so does any one of them match the rule? Also, the rule conditions would create a cartesian join because the PoolInfo and PostponementRequest are not logically related. In other words, if you had PoolInfo1, PoolInfo2, PostponementRequest1, PostponementRequest2 in working memory, and all matched the rule, you'd get the following rule firings: PoolInfo1, PostponementRequest1 PoolInfo1, PostponementRequest2 PoolInfo2, PostponementRequest1 PoolInfo2, PostponementRequest2 Probably not what you want. GreG --- Hehl, Thomas [EMAIL PROTECTED] wrote: I have a unit test that calls a decision table that generated the following rule with drools 4.0.7: #From row number: 10 rule postponePart_10 when PoolInfo(courtLocation == 101, daysBeforeSummons = 7, daysBeforeSummons = 999) postponementRequest: PostponementRequest(requestDaysAfterSummons = 30, requestDaysAfterSummons = 90, requestedDayOfWeek = 2, requestedDayOfWeek = 2) then postponementRequest.setAllowed(true); end This rule passes when daysBeforeSummons = 30. I then change the daysBeforeSummons to 5 and the rule still passes. I have debugged this and watched it run rule 10, so I don't know what else to do. Does this look like a bug? Thom Hehl Sr. eJuror Architect ACS: Government Solutions * Office (859) 277-8800 x 144 * [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] 1733 Harrodsburg Road Lexington, KY 40504-3617 This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message and notify sender via e-mail at [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] or by telephone at 859-277-8800 ext. 144. Thank you. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Drools vs Business Logic
Well, IMO, common sense suggests highly specialised hand crafted code optimised to a particular problem domain *should* be faster than a generic algorithm (taking this further why not dump the high level languages all together and opt for C++ or assembler, if you really really want you squeeze performance?!?). However should your problem domain change you have the burden of changing and re-optimising your code. Lots of hassle. IMO, rule engines are great where your problem domain is likely to change or you want to externalise your rule definitions for whatever reason (maintainability, exposure to user definitions etc). You'd be better off comparing the performance of a prototype hand-crafted solution to generic rule engine solution - I think you'd be surprised as to just how fast the generic solution is - there have been quite a few postings to this group where people have done performance tests of Drools. Only you can make these decisions as you know your requirements best. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Harsh Jetly Sent: 08 August 2008 08:18 To: rules-users@lists.jboss.org Subject: [rules-users] Drools vs Business Logic Hi , Firstly I would like to apologize for sending the same question to both the mailing lists and sending it multiple number of times. I assure you , it shall not happen again . I am using version 4.0.4 of drools . I have a basic question : If we compare a rule engine to code written within the application , which would prove to be faster . I know about the rete algorithm and concepts of node sharing and caching . Another question that I have is , in which situation will Drools be best suited ? Thanks a ton Harsh Jetly Larsen Toubro Infotech Ltd. www.Lntinfotech.com This Document is classified as: |--| | [X] | |--|LT Infotech Proprietary |--| | [ ] | |--|LT Infotech Confidential |--| | [ ] | |--| LT Infotech Internal Use Only |--| | [ ] | |--|LT Infotech General Business This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system. __ ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Drools vs Business Logic
Section 2.2. Why use a Rule Engine in the documentation gives a wealth of extra information that I forgot about first time round! -Original Message- From: Anstis, Michael (M.) Sent: 08 August 2008 09:07 To: 'Rules Users List' Subject: RE: [rules-users] Drools vs Business Logic Well, IMO, common sense suggests highly specialised hand crafted code optimised to a particular problem domain *should* be faster than a generic algorithm (taking this further why not dump the high level languages all together and opt for C++ or assembler, if you really really want you squeeze performance?!?). However should your problem domain change you have the burden of changing and re-optimising your code. Lots of hassle. IMO, rule engines are great where your problem domain is likely to change or you want to externalise your rule definitions for whatever reason (maintainability, exposure to user definitions etc). You'd be better off comparing the performance of a prototype hand-crafted solution to generic rule engine solution - I think you'd be surprised as to just how fast the generic solution is - there have been quite a few postings to this group where people have done performance tests of Drools. Only you can make these decisions as you know your requirements best. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Harsh Jetly Sent: 08 August 2008 08:18 To: rules-users@lists.jboss.org Subject: [rules-users] Drools vs Business Logic Hi , Firstly I would like to apologize for sending the same question to both the mailing lists and sending it multiple number of times. I assure you , it shall not happen again . I am using version 4.0.4 of drools . I have a basic question : If we compare a rule engine to code written within the application , which would prove to be faster . I know about the rete algorithm and concepts of node sharing and caching . Another question that I have is , in which situation will Drools be best suited ? Thanks a ton Harsh Jetly Larsen Toubro Infotech Ltd. www.Lntinfotech.com This Document is classified as: |--| | [X] | |--|LT Infotech Proprietary |--| | [ ] | |--|LT Infotech Confidential |--| | [ ] | |--| LT Infotech Internal Use Only |--| | [ ] | |--|LT Infotech General Business This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system. __ ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Use of a DAO in LHS
I suspect you may not have read the documentation. Take a look at the from keyword. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of BINET JEAN-BAPTISTE Sent: 08 August 2008 16:01 To: rules-users@lists.jboss.org Subject: [rules-users] Use of a DAO in LHS Hello, I have a DRL file in which I have a global variable representing a DAO. So, I succeed in writting a rule which uses this DAO to run a SQL query on the database from the RHS part. But now, I would like to use my DAO in the LHS, I mean I want to fire my rule only if a condition is ok on the result of my SQL query. Is it possible to call a method of my DAO in the LHS part ? I have not found an example. Thanks. Regards, Jean-Baptiste ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] determinism with rulebase partitioning
Hi Mark, A few questions:- (A) What does parallel evaluation of a rulebase mean? Is it designed to optimise, for example, two threads processing a stateless and stateful session? (B) Are there only two partitions, both of which are invisible to the user? Is there any value in allowing user-defined partitions? (C) Does the partition used depend upon what type of session is used (i.e. stateless always uses the partition without an agenda whereas stateful always uses the partition with an agenda)? (D) Can a rule sometimes be deterministic and sometimes not (i.e. depends upon the type of session)? Cheers, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Proctor Sent: 01 August 2008 07:05 To: Rules Users List Subject: [rules-users] determinism with rulebase partitioning We have rulebase partitioning almost working, this allows parallel evaluation of a rulebase. For stateless lessions with no agenda this will allow for much faster executions, where you don't care about deterministic execution. However for deterministic execution its more complicated. The current plan is to have an agenda per parition, which means that we no longer have rulebase wide deterministic execution order, only with the partition itself. The user is unlikely to be aware of the created partitions, so won't be aware of the unditermistic behavour of their rulebase. Anyone have any input on mechanisms users can do to help the rulebase know what needs to be executed deterministically and what doesn't? Mark ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] 'from global' and the workingMemory
I believe the from keyword will iterate only the items in list1. I don't consider it naïve though; just doing what it is documented to do. If you want to iterate facts in the RETE network you need to insert them into working memory. You could use a rule to do this (copy from a global into WM) or do it from your application. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Yoni Mazar Sent: 30 July 2008 09:46 To: rules-users@lists.jboss.org Subject: [rules-users] 'from global' and the workingMemory Hi all, Let's look at the following example: DRL file*** global java.util.List list1; global java.util.List list2; rule r1 when Fact(...) from list1 then Application ListFact facts1 = ... ListFact facts2 = ... ListFact allFacts= facts1+facts2 StatelessSession session = ... session.setGlobal(list1, facts1); session.setGlobal(list2, facts2); session.execute(allFacts) The question: will rule r1 use the facts from the working memory and a rete algorithm, or will it naively loop on list1 items? BTW, can we use generic in the DRL section? for example: global java.util.ListFact list1; Thanks for the help, Yoni -- View this message in context: http://www.nabble.com/%27from-global%27-and-the-workingMemory-tp18728639p18728639.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] 'from global' and the workingMemory
OK, sorry, I missed that (important) part ;-) Reading the API Docs says execute Insert a List of facts, an fire the rules, returning when finished. This will assert the list of facts as SEPARATE facts to the engine (NOT as a List). So I guess r1 will activate for ALL facts in allFacts but whether the pattern in r1 (from) leads to duplicate activations of the same objects obtained from the global I don't know. Section 2.5.8. Truth Maintenance with Logical Objects of the manual talks about STATED facts and a check for equivalence but I think this only applies to insertions into WM. I'd guess that you'd get two activations for those facts in list1 and allFacts because of the use of from - but it would be a guess. Have you conducted a test (if so what did you get) or is it hyperthetical at the moment? Sorry my eager response turned out not to be that helpful after all! -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Yoni Mazar Sent: 30 July 2008 10:15 To: rules-users@lists.jboss.org Subject: RE: [rules-users] 'from global' and the workingMemory Thanks for the prompt response. In the example bellow one can see that list1 items are actually passed to the execute() method. Hence the dilema whether the engine will look at the WM or at the global. to my understanding, it will loop on the global. I just want to be sure that I understand it correctly. Thanks, Yoni Anstis, Michael (M.) wrote: I believe the from keyword will iterate only the items in list1. I don't consider it naïve though; just doing what it is documented to do. If you want to iterate facts in the RETE network you need to insert them into working memory. You could use a rule to do this (copy from a global into WM) or do it from your application. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Yoni Mazar Sent: 30 July 2008 09:46 To: rules-users@lists.jboss.org Subject: [rules-users] 'from global' and the workingMemory Hi all, Let's look at the following example: DRL file*** global java.util.List list1; global java.util.List list2; rule r1 when Fact(...) from list1 then Application ListFact facts1 = ... ListFact facts2 = ... ListFact allFacts= facts1+facts2 StatelessSession session = ... session.setGlobal(list1, facts1); session.setGlobal(list2, facts2); session.execute(allFacts) The question: will rule r1 use the facts from the working memory and a rete algorithm, or will it naively loop on list1 items? BTW, can we use generic in the DRL section? for example: global java.util.ListFact list1; Thanks for the help, Yoni -- View this message in context: http://www.nabble.com/%27from-global%27-and-the-workingMemory-tp18728639p18728639.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- View this message in context: http://www.nabble.com/%27from-global%27-and-the-workingMemory-tp18728639p18729195.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Measuring Drools Memory Usage
Do you use a stateful session? Are your measurements before and after you've inserted facts into working memory? Would be helpful to the group to post your use-case source? Thanks, Mike From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roger Tanuatmadja Sent: 29 July 2008 02:12 To: Rules Users List Subject: [rules-users] Measuring Drools Memory Usage Hi, Has anyone attempted to measure the incremental memory usage of using Drools? Anyone cares to share their methodology? I am currently following the following methodology: 1. Prevent garbage collection from happening by using large Xms Xmx (1024m in my case), a NewRatio of 2 (I am sure other sizes will work as well) and verbogegc enabled to confirm that no garbage collection is happening. 2. Use Runtime.freeMemory before and after fireAllRules and measuring the difference. The problem with my methods so far has been that after a positive memory usage (indicating you are using memory), subsequent use case (the same one) incurs zero memory usage which is very strange. So I guess my question is 2 fold: anyone care to share their methodology, and can anyone see what's wrong with mine? Thanks, Roger ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] database access via JDBC
You can use any technology you like to get data from outside the Working Memory using the from keyword. Look at the documentation for more details. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of thomas kukofka Sent: 28 July 2008 14:01 To: Rules Users List Subject: [rules-users] database access via JDBC Hello, is it possible to access a database from within the rule file via JDBC? I only read about access via Hibernate. Is there any JDBC example? regards Tom ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] How to invoke particular ruleflow multiple rule flowsfrom from stateless session
drools.getworkingmemory.startprocess(id) Starts a new process instance for the process with the given id. Section 6.8.4. Using a rule flow in your application of the (4.0.5) manual gives more information. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of raj_drools Sent: 22 July 2008 18:59 To: rules-users@lists.jboss.org Subject: [rules-users] How to invoke particular ruleflow multiple rule flowsfrom from stateless session i'm using stateles ssession . i have multiple rule flows , i want to invoke respective rule flow from controller . i can invoke ruleflow drools.getworkingmemory.startprocess(id). from a dummy rule . i can do the above procedure if i have single ruleflow . i'm having multiple rule flows , how can i invoke particular ruleflow -- View this message in context: http://www.nabble.com/How-to-invoke-particular-ruleflow-multiple-rule-fl ows-from--from-stateless-session-tp18595249p18595249.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] RE: [rules-dev] Multi threading usage best practice
Cross posted for information.
Ths subject is more for the user list than the dev' one.
Cheers,
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of 9Lives 9Lives
Sent: 14 July 2008 14:33
To: Rules Dev List
Subject: RE: [rules-dev] Multi threading usage best practice
TnX Mike 4 the quick response.
I'm afraid that u r right regarding the through-put ;-(
Using the synchronized method will probably solve my problem
but will damage the solution.
If u have any other thoughts on the matter i would love 2 hear
them.
Regards
Dotan
Subject: RE: [rules-dev] Multi threading usage best practice
Date: Mon, 14 Jul 2008 14:24:02 +0100
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Hi,
Would synchronising on working memory effectively serialise the
effects of fireAllRules()?
...
synchronised(wm) {
wm.fireAllRules();
}
...
I don't know whether this would kill your through-put either.
Cheers,
Mike
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of 9Lives 9Lives
Sent: 14 July 2008 13:41
To: [EMAIL PROTECTED]
Subject: [rules-dev] Multi threading usage best practice
Hello
I'm using Drools 4.0.7 inside a mail relay application 2
determine the operations that need 2 b executed on each passing message.
To do this i'm using the following scenario:
1.
I have a ruleBase.newStatefulSession().
2.
I have a fixed set of facts.
3.
I have a fixed set of rules.
4.
Each mailer (a thread that is handling a single
message) is inserting the message to the working memory, calls the
fireAllRules method and retracts the message.
5.
Rules that r executed change custom attributes
in the message.
Problem:
I noticed that sometimes a rule can b executed on the
same message more then once.
Assumption:
My guess is that because i'm working is a multi
threading environment but using a stateful session, what happens is:
1. Thread A is inserting Message A.
2. Thread B is inserting Message B
3. Thread A is calling fireAllRules
4. Rule X is executed on messages A + B.
5. Thread B is calling fireAllRules
6. Rule X is executed on messages A + B
7. Thread A is retracting Message A
8. Thread B is retracting message B
Question:
My goal is 2 make sure a rule is executed only once on a
single message.
Any ideas on how 2 avoid the situation described above?
TnX
Dotan
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RE: [rules-users] Drools 4 poor performance scaling?
I wonder whether is's a benefit of truth maintenance? If a new fact is
inserted into working memory that could cause an activation of a rule
that contains an accumulate (or collect) to change then the whole
accumulate (or collect) operator is executed again?!?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Fenderbosch,
Eric
Sent: 09 July 2008 14:41
To: Rules Users List
Subject: RE: [rules-users] Drools 4 poor performance scaling?
FYI for the group. We seem to have solved our performance problem.
I'll describe our problem space a bit some people have some context. We
load up about 1200 Jobs with about 3000 Stops and about 1500 Vehicles
with about 2000 Workers. We then calculate Scores for each Vehicle for
each Job. Some combinations get excluded for various reasons, but we
end up with 700k - 900k total facts. We do score totaling and sorting
using accumulators.
One of our teams members (nice find Dan) decided to try to isolate the
accumulation rules until all our other facts are loaded. Those rules
now have a not ColdStarting() condition and our startup code inserts a
ColdStarting fact as the first fact and retracts it when all the Jobs
and Workers have been loaded. This changed our startup time from over
50 minutes to under 5. There's some sort of strange propagation and
looping going on with accumulation on the fly, at least with our facts
and rules.
I'll put an entry on the wiki as well.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Fenderbosch,
Eric
Sent: Monday, June 30, 2008 11:46 AM
To: Rules Users List
Subject: RE: [rules-users] Drools 4 poor performance scaling?
We are having a similar problem, although our fact count is much higher.
Performance seems pretty good and consistent until about 400k facts,
then performance degrades significantly. Part of the degradation is
from bigger and more frequent GCs, but not all of it.
Time to load first 100k facts: ~1 min
Time to load next 100k facts: ~1 min
Time to load next 100k facts: ~2 min
Time to load next 100k facts: ~4 min
This trend continues, going from 600k to 700k facts takes over 7
minutes. We're running 4.0.7 on a 4 CPU box with 12 GB, 64 bit RH Linux
and 64 bit JRockit 5. We've allocated a 9 GB heap for the VM using
large pages, so no memory paging is happening. JRockit is started w/
the -XXagressive parameter, which enables large pages and the more
efficient hash function in HashMap which was introduced in Java5 update
8.
http://e-docs.bea.com/jrockit/jrdocs/refman/optionXX.html
The end state is over 700k facts, with the possibility of nearly 1M
facts in production. After end state is reached and we issue a few GC
requests, if looks like our memory per fact is almost 9k, which seems
quite high as most of the facts are very simple. Could that be due to
our liberal use of insertLogical and TMS?
We've tried performing a commit every few hundred fact insertions by
issuing a fireAllRules periodically, and that seems to have helped
marginally.
I tried disabling shadow proxies and a few of our ~390 test cases fail
and one loops indefinitely. I'm pretty sure we could fix those, but
don't want to bother if this isn't a realistic solution.
Any thoughts?
Thanks
Eric
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ron Kneusel
Sent: Thursday, June 26, 2008 12:47 PM
To: rules-users@lists.jboss.org
Subject: [rules-users] Drools 4 poor performance scaling?
I am testing Drools 4 for our application and while sequential mode is
very fast I get very poor scaling when I increase the number of facts
for stateful or stateless sessions. I want to make sure I'm not doing
something foolish before deciding on whether or not to use Drools
because from what I am reading online it should be fast with the number
of facts I have.
The scenario: I have 1000 rules in a DRL file. They are all of the
form:
rule rule
when
Data(type == 0, value 0.185264);
Data(type == 3, value 0.198202);
then
insert(new AlarmRaised(0));
warnings.setAlarm(0, true);
end
where the ranges checked on the values and the types are randomly
generated. Then, I create a Stateful session and run in a loop timing
how long it takes the engine to fire all rules as the number of inserted
facts increases:
// Run
for(j=0; j 100; j+=5) {
if (j==0) {
nfacts = 1;
} else {
nfacts = j;
}
System.out.println(nfacts + :);
// Get a working memory
StatefulSession wm = ruleBase.newStatefulSession();
// Global - output
warnings = new Alarm();
wm.setGlobal(warnings, warnings);
// Add facts
st = (new Date()).getTime();
for(i=0; i nfacts; i++) {
wm.insert(new Data(rand.nextInt(4),
RE: [rules-users] Rules 'firing' multiple times?
Hi, Given the rule you show it doesn't matter how many records you have on a table UNLESS they are inserted into working memory. So, assuming you have code outside of that below which inserts each individual record into working memory, then you can expect one activation to appear on the agenda for each Emp_Crime_Record object in working memory that have disposition equal to GUILTY. Does this make sense? Rule activations are put on the agenda as objects are inserted into working memory and not when you call fireAllRules() - which executes the activations on the agenda. So, every time you insert an object into working memory the object is checked against the patterns defined in the left-hand-side (when). If they match an activation is put on the agenda (the right-hand-side - then) for later execution (when you call fireAllRules). Cheers, Mike From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of pramod george Sent: 08 July 2008 10:58 To: rules-users@lists.jboss.org Subject: [rules-users] Rules 'firing' multiple times? Hi all. I have this question on drools rules and I'm not sure if this is the right thinking? I have a rule defined in a drl file: when c: Emp_Crime_Record(DISPOSITION == GUILTY); then System.out.println(CriminalRecordRule fired...); end Here, if the table Emp_Crime_Record is got 5 rows that satisfy this condition ie:- DISPOSITION == GUILTY, then does this rule get fired 5 times? Ie:- the sop gets printed 5 times? For this, if there are a million records that satisfy this condition - then the firing happens a million times? I would be greatful if this can be clarified? Thanks a million! :) -Promod ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] One question about Database interface
Hi, Jaroslaw Kijanowski's article looks like a really good starting point for you! Hibernate provide Entity Manager and Annotations extensions if you want to go the JPA route. From a Drool's perspective you need only concern yourself with from which is documented as:- 6.5.2.8. From The from Conditional Element allows users to specify a source for patterns to reason over. This allows the engine to reason over data not in the Working Memory. This could be a sub-field on a bound variable or the results of a method call. It is a powerful construction that allows out of the box integration with other application components and frameworks. One common example is the integration with data retrieved on-demand from databases using hibernate named queries. For information on the rest of Jaroslaw's example, you will need to read up on Hibernate. With kind regards, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Senlin Liang Sent: 08 July 2008 13:12 To: Rules Users List Subject: Re: [rules-users] One question about Database interface Thanks. Where could I find the related manual or instructions? I searched through the doc for drools, and the email archive, there is really no good example or explanation on how to achieve this. (What I want is to insert, select or delete some objects in relational database such as mysql.) Any information is greatly appreciated. Thanks. On Tue, Jul 8, 2008 at 4:20 AM, Anstis, Michael (M.) [EMAIL PROTECTED] wrote: Have a look at an example posted earlier this week whereby somebody (sorry I forget who) was using JPA from within a rule. Once you understand how JPA was used then the remaining questions relate more specifically to JPA. As Mark says, (native) Hibernate can also be used very easily. With kind regards, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Senlin Liang Sent: 08 July 2008 03:18 To: Rules Users List Subject: [rules-users] One question about Database interface Hi all, Is there some convinent database interface implemented in Drools (store and retrieve data from DBMS, such as mysql) ? I checked the manual, and found no such information. So I am assuming that I will have to use JDBC. Is it right? Thanks, Senlin Liang ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Senlin Liang ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Package parameters
Hi,
I don't think Drools supports this directly, but would this not be as
accomplishable with DSL?
Your Drools rule could then be written something like this (bare in mind I'm
no DSL expert):-
DSL:
[when]There is a hemoglobin lab result with=LabResult(type==hemoglobin)
[when]- a value less than {v}=value{v}
Rule:
There is a hemoglobin lab result with
- a value less than 42
With kind regards,
Mike
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Yoni Mazar
Sent: 26 June 2008 15:29
To: rules-users@lists.jboss.org
Subject: [rules-users] Package parameters
Hi all,
We are at the begining of a new clinical decision-support project. We are
considering using a BRMS to manage and execute our business logic. As part
of our research, we evaluated JRules and Drools. JRules has a nice feature
that we could not find in Drools. We'd like to know if we are
misunderstanding something, or maybe this feature is missing.
In JRules, one can define a ruleset (corresponds to a package) with
parameters. Each parameter has a datatype (a class), a direction
(in/out/inout), and an alias. Then, within the rules, the user can refer to
the parameter alias. For example, a user can define a ruleset with the
following parameters:
*class=LabResult, direction=in, alias=hemoglobin
*class=LabResult, direction=in, alias=creatinin
Then, within a rule, one can write:
when hemoglobin.value10 and creatinin.value34
then...
Now, the application retrieves the patient data accordingle (hemoglobin and
creatinine data separetly) and sets the ruleset parameters:
ruleset.parameters.add(hemoglobin,hemoglobinFact)
ruleset.parameters.add(creatinin,creatininFact)
This approach simplifies the rule authoring process significantly!
Writing this logic in Drools will be:
package cdss
import LabResult;
rule
when
LabResult(type=hemoglobin value 10)
LabResult(type=creatinin value 34)
then...
workingMemory.Assert(hemoglobinFact);
workingMemory.Assert(creatininFact);
Does someone has an idea how to bridge this gap using Drools?
Im not sure if using parameters JRule complies with JSR94 specification.
Thanks,
Yoni
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RE: [rules-users] Stateless session and rule flows
Hi,
I believe Stateless session is only a wrapper around a stateful session, so
you're only gaining convenience by using a Stateless one.
Why not write your own wrapper that allows for the execution of a rule flow
too?
Cheers,
Mike
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Yoni Mazar
Sent: 26 June 2008 15:31
To: rules-users@lists.jboss.org
Subject: [rules-users] Stateless session and rule flows
Hi Guys,
We are trying to work with drools with stateless session (Sequential) and to
apply rule flows.
we use the following code:
//define diagnosis and patient here
...
StatelessSession session = ruleBase.newStatelessSession();
//Here we would like to use: session.startProcess(ruleflow id) but this is
a method which belongs to
//StatefullSession only.
session.execute(new Object[] {diagnosis, patient});
How can we do that in steteless mode?
Thanks,
Yoni
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tml
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RE: [rules-users] Drools 4.0.7 supports Clustering and DB interaction ?
Partial answer. 2. Drools supports database interactions. Have a look at the from clause which allows for retrieval of data from outside the working memory. Cheers, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thalupula Ravi Sent: 30 May 2008 09:13 To: rules-users@lists.jboss.org Subject: [rules-users] Drools 4.0.7 supports Clustering and DB interaction ? Hi, Can some one answer my questions regarding drools support 1. is drools supports clustering? 2. is drools supports Database interactions? appreciate your help. it would be great for me, if any body provide examples for above things. -- View this message in context: http://www.nabble.com/Drools-4.0.7-supports-Clustering-and-DB-interaction--- tp17553747p17553747.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Re: Old drools-spring project
Without knowledge of your use case or domain model the below seems reasonable! Cheers, Mike _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lake Pancake Sent: 30 May 2008 13:33 To: rules-users@lists.jboss.org Subject: [rules-users] Re: Old drools-spring project Thanks for the reply. I was primarily attracted to spring-drools because of the use of Java to define complex logic in the conditions, but I have since found this old thread that summarizes pretty nicely how to do that without spring-drools: http://article.gmane.org/gmane.comp.java.drools.user/1204 Based on the above suggestion of using facts I've come up with the following rule: rule Decline Request dialect mvel when request : Request( status == ( RequestStatus.validated ) ) Condition( request == request, failed == true ) then request.setStatus( requestStatus.declined ); update( request ); end Then I insert into the session Java classes that extend my Condition abstract. Each Condition contains the request, and should any Condition return true from its getFailed method, then the request is declined. Seem reasonable? On Thu, May 29, 2008 at 8:32 AM, Lake Pancake [EMAIL PROTECTED] wrote: I found this: http://docs.codehaus.org/display/DROOLS/Drools+Spring+Tutorial The latest version available for drools-spring appears to be 2.5-beta-1. Is it stable and does it work with Drools 4 or should I stay away? Thanks smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Nested Rules
Erm, Rule Flow springs immediately to mind. Or you can use semaphore Facts yourself - but you're re-inventing the (Rule Flow) wheel. rule rule 1 when condition is true then insert(new SemaphoreFact()); end rule rule 2 when SemaphoreFact() Some other conditions are true; then action end rule rule 3 when Even more conditions then action end _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Vishal Deshmukh Sent: 22 May 2008 10:31 To: rules-users@lists.jboss.org Subject: [rules-users] Nested Rules Hi I am using Drools 4.0.4 with Eclipse 3.2. I m much happy with the results. But now my application needs nested loops.. Can i write nested rules like rule rule 1 // if condition of rule 1 is true then only execute rule 2 other wise skip it when condition is true then execute rule2 rule rule 2 when condition is true then action rule rule 3 when condition is true then action Thanks and Rgards Vishal smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] newbie question on when condition syntax
Hi Richard,
The when section matches fact (object) patterns, so your requirement could
be written as:-
when there is a Test Fact 'A' and another Test Fact 'B' where the 'x'
property of 'A' equals the 'y' property of fact 'B' plus 1 then.
This would become:-
rule Rule 1
when
Test( $y : y )
Test( x == ($y + 1) )
then
System.out.println(Rule 1 matches);
end
By default both patterns can match the same object, so test data:-
A : x = 1, y = 1
B : x = 2, y = 1
Will cause the rule to activate twice:-
A and B
B and B
With kind regards,
Mike
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Richard Bremner
Sent: 02 May 2008 08:53
To: rules-users@lists.jboss.org
Subject: [rules-users] newbie question on when condition syntax
Hi,
say I have a class with two fields, x and y:
public class Test {
int x = 1;
int y = 2;
getters/setters...
}
I would like a rule which fires when y = x + 1
my initial thought would be something like:
rule Rule 1
when
test : Test (y == x + 1)
then
System.out.println(Rule 1 matches.);
end
but this is invalid syntax and I can not find any examples of such a rule.
I'm doing my best but reading the manual etc. I'm struggling with the syntax
here and can't figure it out.
any help really appreciated!
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RE: [rules-users] newbie question on when condition syntax
Hi Richard,
Glad I can be of help (this forum as a whole is actually very helpful).
Reading your email you understand me correctly (you even picked up on the
implicit AND between pattern matches).
With a bit of imagination complex problems can be solved with Drools; just
like programming you need to adjust your mindset sometimes and try a
different tact.
Personally, if your rules are not user-facing, I wouldn't worry about DSL -
even if they do don't worry for the time being!
Make sure to read the excellent manual, many people have put a lot of work
into this and it is invaluable.
Read about dialect to answer your question about rule language, to save me
copy and pasting.
Good luck,
Mike
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Richard Bremner
Sent: 02 May 2008 11:38
To: Rules Users List
Subject: Re: [rules-users] newbie question on when condition syntax
Hi Mike,
Thanks very much, after a few minutes of staring I think I have understood
your very well put answer!
If I understand you right, what is happening is:
Test( $y : y )
This means, WHEN there is an instance of Test, assign the value of its y
property to $y
AND
WHEN there is an instance of Test where it's x property is equal to $y + 1
THEN fire.
I think I understand that. I am going to need to do this with some pretty
complicated formulae, containing up to 8 different variables. I have a fixed
data set and need to find certain patterns in them based on the formulae. I
have most of the program figured out, my only trouble is expressing my
formulae in the correct syntax. I will try to extend this principle you have
explained to me and hope it can cope with the extra complication... unless
there would be a better way to achieve this?
I am really sorry but I am totally new to drools - but am committed to using
it on a project so I guess I'm going to get to know it pretty well :-)
I read briefly that one can define a DSL, I might look at this eventually to
build an easier mechanism for expressing my formulae - if that can be
achieved using a DSL.
Can the whole rule be defined in Groovy/Java - if so I might be easier doing
that. I have so much work to do!
many thanks
Richard
2008/5/2 Anstis, Michael (M.) [EMAIL PROTECTED]:
Hi Richard,
The when section matches fact (object) patterns, so your requirement could
be written as:-
when there is a Test Fact 'A' and another Test Fact 'B' where the 'x'
property of 'A' equals the 'y' property of fact 'B' plus 1 then.
This would become:-
rule Rule 1
when
Test( $y : y )
Test( x == ($y + 1) )
then
System.out.println(Rule 1 matches);
end
By default both patterns can match the same object, so test data:-
A : x = 1, y = 1
B : x = 2, y = 1
Will cause the rule to activate twice:-
A and B
B and B
With kind regards,
Mike
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Richard Bremner
Sent: 02 May 2008 08:53
To: rules-users@lists.jboss.org
Subject: [rules-users] newbie question on when condition syntax
Hi,
say I have a class with two fields, x and y:
public class Test {
int x = 1;
int y = 2;
getters/setters...
}
I would like a rule which fires when y = x + 1
my initial thought would be something like:
rule Rule 1
when
test : Test (y == x + 1)
then
System.out.println(Rule 1 matches.);
end
but this is invalid syntax and I can not find any examples of such a rule.
I'm doing my best but reading the manual etc. I'm struggling with the syntax
here and can't figure it out.
any help really appreciated!
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RE: [rules-users] RuleBase relation with working memory
It will occur whenever you (the developer) make it occur. I guess Rulebase is the RETE network (without memory nodes) and the WM's are in essence the RETE network memory nodes. This is my interpretation of their roles. Here's an example:- Rulebase RuleBase ruleBase = RuleBaseFactory.newRuleBase(); ruleBase.addPackage(pkg); Working Memory -- WorkingMemory wm1 = ruleBase.newStatefulSession(); WorkingMemory wm2 = ruleBase.newStatefulSession(); WorkingMemory wm3 = ruleBase.newStatefulSession(); WorkingMemory wm4 = ruleBase.newStatefulSession(); ... Rulebase 1:n. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of anandhakrishnan Sent: 28 April 2008 15:30 To: rules-users@lists.jboss.org Subject: [rules-users] RuleBase relation with working memory Please Explain, RuleBase 1:n relationship with Working memory, when will it occur. Please give an example thanks In Advance -- View this message in context: http://www.nabble.com/RuleBase-relation-with-working-memory-tp16940200p16940 200.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] StateFullSession / StatelessSession
Have you read the manual? I would really, really suggest you do. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of anandhakrishnan Sent: 28 April 2008 15:37 To: rules-users@lists.jboss.org Subject: [rules-users] StateFullSession / StatelessSession What are statefulsession rules and statelesssion rules, What is the difference, Can I get any example When shud i use statefullsession, and when shud i use statelesssession Please help thanks in advance -- View this message in context: http://www.nabble.com/StateFullSession---StatelessSession-tp16940355p1694035 5.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Fundamental Question
IMO, the analogy between Rule Engine and ORDBMS *could* be made with only very simple business rules covering one object (presumably mapped to one table). However you would still need to design mechanisms to support truth maintenance and an activation schedule. Once the complexity of your business rules exceeds even the very simple you will need to implement a whole host of cross-table-triggers to support different objects in a rule (and who knows how complex the business rules will become?). This doesn't even touch upon more advanced features like collect and accumulate. You would be in essence implement a rule engine in a ORDBMS using the ORDBMS triggers and tables as the RETE network nodes. I would compare using a rule engine vs ORDBMS to using say, RichFaces instead of HTML and the XMLHttpRequest object: both can achieve the same result but one is more painful. Drools is free, fast, feature rich and easy to use. Why reinvent the wheel? With kind regards, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Raffi Khatchadourian Sent: 23 April 2008 16:48 To: rules-users Subject: [rules-users] Fundamental Question What is the difference in using a rules engine like drools as opposed to using either an object database or ORDBMS mapping to a database with triggers? ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Re: Is this scenario suitable for using Drools?
So, in my usual helpful manner I thought Drools would be a perfect match and
put together what I thought would be a simple example:-
package com.sample
global com.sample.DBUtils dbutils;
rule a1
when
$max : Integer() from accumulate( Integer( $v : intValue ) from
dbutils.getNumbers(), max($v) )
then
System.out.println($max);
end
public class DBUtils {
public Integer[] getNumbers() {
Integer[] numbers = new Integer[10];
for (int i = 0; i numbers.length; i++) {
numbers[i] = (int) (Math.random() * 100);
}
return numbers;
}
}
However this led to some errors:-
org.drools.RuntimeDroolsException: java.lang.ClassCastException:
[Ljava.lang.Integer; incompatible with java.lang.Integer
at org.drools.rule.Accumulate.accumulate(Accumulate.java:131)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:127)
at
org.drools.reteoo.CompositeTupleSinkAdapter.createAndPropagateAssertTuple(Co
mpositeTupleSinkAdapter.java:73)
at
org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.jav
a:116)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObject
SinkAdapter.java:22)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153)
at org.drools.reteoo.Rete.assertObject(Rete.java:177)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(
ReteooWorkingMemory.java:179)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorking
Memory.java:1292)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:89
1)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:85
8)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:65
9)
at com.sample.DroolsTest.main(DroolsTest.java:36)
Caused by: java.lang.ClassCastException: [Ljava.lang.Integer; incompatible
with java.lang.Integer
at org.drools.base.java.lang.Integer968047027$intValue.getIntValue(Unknown
Source)
at
org.drools.base.ClassFieldExtractor.getIntValue(ClassFieldExtractor.java:197
)
at org.drools.rule.Declaration.getIntValue(Declaration.java:230)
at
com.sample.Rule_a1_0AccumulateExpression0Invoker.evaluate(Rule_a1_0Accumulat
eExpression0Invoker.java:16)
at
org.drools.base.accumulators.JavaAccumulatorFunctionExecutor.accumulate(Java
AccumulatorFunctionExecutor.java:74)
at org.drools.rule.Accumulate.accumulate(Accumulate.java:123)
... 13 more
Have I done something really stupid and is Drools a fit?
Cheers,
Mike
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Cheng Wei Lee
Sent: 22 April 2008 17:27
To: rules-users@lists.jboss.org
Subject: [rules-users] Re: Is this scenario suitable for using Drools?
I've 2 algorithms to calculate the cost of a product. At any one time, there
is only 1 algorithm in use. Initially algorithm 1 will be the default.
Subsequently, the decision to use which algorithm will depend on customers
feedback. The algorithms are:
Algorithm 1:
Cost = MAX(P1, T1, P2, T2, P3, T3, ...)
Algorithm 2:
Cost = MIN(P1, P2, P3, ...) + MIN(T1, T2, T3, ...)
The values of P1, P2, ... are stored within a database. The number of Ps
Ts are unknown but can be determined by querying the database, Would drools
be a good option to use to store the algorithms? If so, how could I be able
to retrieve the values of P1, P2, etc from the database from within drools?
Thanks!
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RE: [rules-users] What-if analysis
I believe this is an example of backwards-chaining. (From the manual) Drools only supports forward-chaining at present although ...Drools will be adding support for Backward Chaining in its next major release Have you looked at Geoffrey De Smet's drools-solver excellent work? Will this provide what you need? Cheers, Mike _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ravi Shankar (Singtel) Sent: 22 April 2008 23:25 To: rules-users@lists.jboss.org Subject: [rules-users] What-if analysis Dear all, Does Drools support what-if analysis? For example, I have the data for the sales done by a salesman for the past one year. There is a commission available to the salesman for the same he is doing. I use the data to plot a graph showing the efficiency of all salesmen in my company. Assume that the comany wants a profit of , say, 10% more than what currently is, I mean what if the comany wants more revenue, what should be the values for sales. It is a trivial example, but just enough for understanding my query - can we use Drools for this? Is it being used in financial inductry where derivatives etc are used widely? Thanks and regards, Ravion smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Re: Is this scenario suitable for using Drools?
Thanks Steve,
This fixed the problem!
For Cheng Wei Lee's benefit this is the complete solution (I had to fix
another part):-
public class DBUtils {
public Collection getNumbers() {
Integer[] numbers = new Integer[10];
for (int i = 0; i numbers.length; i++) {
numbers[i] = (int)Math.random() * 100;
}
return Arrays.asList(numbers);
}
}
rule a1
when
$max : Number() from accumulate( Number( $v : intValue ) from
dbutils.getNumbers(), max($v) )
then
System.out.println($max.intValue());
end
With kind regards,
Mike
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Steven Williams
Sent: 23 April 2008 09:07
To: Rules Users List
Subject: Re: [rules-users] Re: Is this scenario suitable for using Drools?
change DBUtils to return a Collection and it should work I think.
On Wed, Apr 23, 2008 at 5:50 PM, Anstis, Michael (M.) [EMAIL PROTECTED]
wrote:
So, in my usual helpful manner I thought Drools would be a perfect match and
put together what I thought would be a simple example:-
package com.sample
global com.sample.DBUtils dbutils;
rule a1
when
$max : Integer() from accumulate( Integer( $v : intValue ) from
dbutils.getNumbers(), max($v) )
then
System.out.println($max);
end
public class DBUtils {
public Integer[] getNumbers() {
Integer[] numbers = new Integer[10];
for (int i = 0; i numbers.length; i++) {
numbers[i] = (int) (Math.random() * 100);
}
return numbers;
}
}
However this led to some errors:-
org.drools.RuntimeDroolsException: java.lang.ClassCastException:
[Ljava.lang.Integer; incompatible with java.lang.Integer
at org.drools.rule.Accumulate.accumulate(Accumulate.java:131)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:127)
at
org.drools.reteoo.CompositeTupleSinkAdapter.createAndPropagateAssertTuple(Co
mpositeTupleSinkAdapter.java:73)
at
org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.jav
a:116)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObject
SinkAdapter.java:22)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153)
at org.drools.reteoo.Rete.assertObject(Rete.java:177)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(
ReteooWorkingMemory.java:179)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorking
Memory.java:1292)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:89
1)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:85
8)
at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:65
9)
at com.sample.DroolsTest.main(DroolsTest.java:36)
Caused by: java.lang.ClassCastException: [Ljava.lang.Integer; incompatible
with java.lang.Integer
at org.drools.base.java.lang.Integer968047027$intValue.getIntValue(Unknown
Source)
at
org.drools.base.ClassFieldExtractor.getIntValue(ClassFieldExtractor.java:197
)
at org.drools.rule.Declaration.getIntValue(Declaration.java:230)
at
com.sample.Rule_a1_0AccumulateExpression0Invoker.evaluate(Rule_a1_0Accumulat
eExpression0Invoker.java:16)
at
org.drools.base.accumulators.JavaAccumulatorFunctionExecutor.accumulate(Java
AccumulatorFunctionExecutor.java:74)
at org.drools.rule.Accumulate.accumulate(Accumulate.java:123)
... 13 more
Have I done something really stupid and is Drools a fit?
Cheers,
Mike
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Cheng Wei Lee
Sent: 22 April 2008 17:27
To: rules-users@lists.jboss.org
Subject: [rules-users] Re: Is this scenario suitable for using Drools?
I've 2 algorithms to calculate the cost of a product. At any one time, there
is only 1 algorithm in use. Initially algorithm 1 will be the default.
Subsequently, the decision to use which algorithm will depend on customers
feedback. The algorithms are:
Algorithm 1:
Cost = MAX(P1, T1, P2, T2, P3, T3, ...)
Algorithm 2:
Cost = MIN(P1, P2, P3, ...) + MIN(T1, T2, T3, ...)
The values of P1, P2, ... are stored within a database. The number of Ps
Ts are unknown but can be determined by querying the database, Would drools
be a good option to use to store the algorithms? If so, how could I be able
to retrieve the values of P1, P2, etc from the database from within drools?
Thanks!
___
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Supervising Consultant
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Office: 8615 4500 Mob: 0439 898 668 Fax: 8615 4501
[EMAIL PROTECTED]
www.objectconsulting.com.au
consulting | development | training | support
our experience makes the difference
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RE: [rules-users] To insert facts or use the find clause?
Don't ask me to explain why but the Drools team always recommend flattening hierarchies before inserting into WM ;-) I *think* this allows for individual facts' properties to be indexed in the RETE network thus affording a performance increase. I guess there's also implications to do with truth maintenance whereby objects accessed using from should be time-constant. My 2c's worth; I'm sure Edson, Mark, Michael et al will elaborate. Cheers, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Raffi Khatchadourian Sent: 18 April 2008 02:34 To: rules-users@lists.jboss.org Subject: [rules-users] To insert facts or use the find clause? I would like to use Drools to reason about a graph structure using queries. The graph consists of a collection of nodes, which in turn each have a collection of edges to nodes. Currently, I have a single fact in the Drools working memory, the graph. My queries then use the from clause to obtain information about the nodes and edges within the graph. I was wondering if it would be better to instead traverse the entire structure adding each node and edge as facts into the working memory. Any ideas? Thanks! ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Why double rule activation?
I have tried to re-produce using System.out.println instead of IELogger
and I don't get any double activations :-(
Could the problem be elsewhere (e.g. IELogger?).
package com.sample
import com.sample.MyVariable;
rule Light is off
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue == 0.0)
then
System.out.println(DimmerSwitch1 has no brightness value);
end
rule Light Below 50%
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue 0.50, currentValue 0.0)
then
System.out.println(DimmerSwitch1 is below 50% brightness);
end
rule Light 50% or Above
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue = 0.5)
then
System.out.println(DimmerSwitch1 is at or above 50%
brightness);
End
public static final void main(String[] args) {
WorkingMemoryFileLogger logger = null;
try {
RuleBase ruleBase = readRule();
WorkingMemory workingMemory = ruleBase.newStatefulSession();
logger = new WorkingMemoryFileLogger(workingMemory);
logger.setFileName(events.log);
MyVariable v1 = new MyVariable([EMAIL PROTECTED], 0.0d);
MyVariable v2 = new MyVariable([EMAIL PROTECTED], 0.4d);
MyVariable v3 = new MyVariable([EMAIL PROTECTED], 0.6d);
workingMemory.insert(v1);
workingMemory.insert(v2);
workingMemory.insert(v3);
workingMemory.fireAllRules();
} catch (Throwable t) {
t.printStackTrace();
} finally {
if (logger != null) {
logger.writeToDisk();
}
}
}
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bagwell, Allen F
Sent: 16 April 2008 20:50
To: Rules Users List
Subject: [rules-users] Why double rule activation?
I've encountered rule engine behavior I'm knocking my head against the wall
trying to figure out. I'm a Drools newbie, so please forgive if this I am
doing something bone-headed wrong.
Basically I'm inserting an object into my working memory. The object itself
has a default setting of 0.0 for a brightness value, and this setting
matches the LHS condition for my first rule. The problem is the rule
activates twice for a single object insertion as described in the audit log.
It consequently executes twice when I fire all rules. Then whenever I change
the value in question, any single update to the same object also causes
double rule activation and execution.
The rules I've written are not complex. Here's my drl file:
package dimmerie;
#list any import classes here.
import knowledgebase.*;
import NipcLogger;
#declare any global variables here
global NipcLogger IELogger;
rule Light is off
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue == 0.0)
then
IELogger.info(DimmerSwitch1 has no brightness value);
end
rule Light Below 50%
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue 0.50, currentValue 0.0)
then
IELogger.info(DimmerSwitch1 is below 50% brightness);
end
rule Light 50% or Above
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue = 0.5)
then
IELogger.info(DimmerSwitch1 is at or above 50%
brightness);
end
I'm hoping I've described enough without having to post additional code.
Can anyone suggest why this is happening?
Thanks,
Allen
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RE: [rules-users] Why double rule activation?
My test was ran with 4.0.5, but Eclipse plug-in 4.0.3 - part of my lazy
upgrade process ;-)
I will re-run with the latest Eclipse plug-in and see if the Audit View is
correct (in 4.0.3 it shows 3 inserts, 3 activations and 3 executions).
Can you run my test and confirm you get what's expected?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bagwell, Allen F
Sent: 17 April 2008 16:00
To: Rules Users List
Subject: RE: [rules-users] Why double rule activation?
I appreciate the effort.
The problem isn't in the logger. It's just standing in for System.out so
that I can reference a file for output (it's an extension of log4j).
The actual Drools audit view is reporting double activation and execution on
insert and update of the objects.
I'm using a loop to insert my objects into Drools, and I thought at first
perhaps I was inserting them more than once. But I don't see that happening.
In any event wouldn't the audit log tell me if I was doing that?
-A
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Anstis, Michael
(M.)
Sent: Thursday, April 17, 2008 2:11 AM
To: Rules Users List
Subject: RE: [rules-users] Why double rule activation?
I have tried to re-produce using System.out.println instead of IELogger
and I don't get any double activations :-(
Could the problem be elsewhere (e.g. IELogger?).
package com.sample
import com.sample.MyVariable;
rule Light is off
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue == 0.0)
then
System.out.println(DimmerSwitch1 has no brightness value);
end
rule Light Below 50%
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue 0.50, currentValue 0.0)
then
System.out.println(DimmerSwitch1 is below 50% brightness);
end
rule Light 50% or Above
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue = 0.5)
then
System.out.println(DimmerSwitch1 is at or above 50%
brightness); End
public static final void main(String[] args) {
WorkingMemoryFileLogger logger = null;
try {
RuleBase ruleBase = readRule();
WorkingMemory workingMemory = ruleBase.newStatefulSession();
logger = new WorkingMemoryFileLogger(workingMemory);
logger.setFileName(events.log);
MyVariable v1 = new MyVariable([EMAIL PROTECTED], 0.0d);
MyVariable v2 = new MyVariable([EMAIL PROTECTED], 0.4d);
MyVariable v3 = new MyVariable([EMAIL PROTECTED], 0.6d);
workingMemory.insert(v1);
workingMemory.insert(v2);
workingMemory.insert(v3);
workingMemory.fireAllRules();
} catch (Throwable t) {
t.printStackTrace();
} finally {
if (logger != null) {
logger.writeToDisk();
}
}
}
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bagwell, Allen F
Sent: 16 April 2008 20:50
To: Rules Users List
Subject: [rules-users] Why double rule activation?
I've encountered rule engine behavior I'm knocking my head against the wall
trying to figure out. I'm a Drools newbie, so please forgive if this I am
doing something bone-headed wrong.
Basically I'm inserting an object into my working memory. The object itself
has a default setting of 0.0 for a brightness value, and this setting
matches the LHS condition for my first rule. The problem is the rule
activates twice for a single object insertion as described in the audit log.
It consequently executes twice when I fire all rules. Then whenever I change
the value in question, any single update to the same object also causes
double rule activation and execution.
The rules I've written are not complex. Here's my drl file:
package dimmerie;
#list any import classes here.
import knowledgebase.*;
import NipcLogger;
#declare any global variables here
global NipcLogger IELogger;
rule Light is off
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue == 0.0)
then
IELogger.info(DimmerSwitch1 has no brightness value); end
rule Light Below 50%
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue 0.50, currentValue 0.0)
then
IELogger.info(DimmerSwitch1 is below 50% brightness); end
rule Light 50% or Above
when
$brightness : MyVariable(uniqueName == [EMAIL PROTECTED],
currentValue = 0.5)
then
IELogger.info(DimmerSwitch1 is at or above 50%
brightness); end
I'm hoping I've described enough without having to post additional code.
Can anyone suggest why this is happening?
Thanks,
Allen
___
rules
RE: [rules-users] Synch Business Object / Working Memory
I guess the example is a simplification as c (in RHS) has not been bound
to a fact.
Anyway, that aside, do you call update to ensure WM knows of changes to
facts otherwise properties need to be time-constant which in your example
they are not.
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Guéhenneux
Sent: 11 April 2008 09:34
To: Rules Users List
Subject: [rules-users] Synch Business Object / Working Memory
Hi,
I have two rules :
rule rule 1 - 1
salience 90
ruleflow-group rfg1
when
a : A(
eComputed == false,
c 15,
d = 75)
then
c.setE(0);
end
rule rule 1 - 2
salience 10
ruleflow-group rfg1
when
a : A(
eComputed == false,
c = 15,
d = 75)
then
c.setE(1);
end
and part of the corresponding business code :
public class A {
...
public String getEComputed(){
if(eComputed)
return true;
else
return false;
}
...
public void setE(int e){
this.e = e;
eComputed = true;
}
...
}
so, I expected that if the first rule is activated, the second won't be. But
according to my tests, the two rule can be fired on the same object A.
While debugging, I noticed the getEComputed method was only called once. I
suppose that I should write this :
rule rule 1 - 1
salience 90
ruleflow-group rfg1
when
a : A(
eComputed == false,
c 15,
d = 75)
then
c.setE(0);
c.setEComputed(true);
end
rule rule 1 - 2
salience 10
ruleflow-group rfg1
when
a : A(
eComputed == false,
c = 15,
d = 75)
then
c.setE(1);
c.setEComputed(true);
end
But I would prefer another solution. Thanks for help.
_
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RE: [rules-users] Synch Business Object / Working Memory
In essence, yes. Have a look at update in the manual (and a read on Shadow
Facts will probably be useful too).
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Guéhenneux
Sent: 11 April 2008 10:24
To: Rules Users List
Subject: RE: [rules-users] Synch Business Object / Working Memory
yes, i made a mistake. its a.setE(...) and not c.setE(...).
I don't call update. If I dont call update, properties of an object are just
read one time for all rules?
_
Subject: RE: [rules-users] Synch Business Object / Working Memory
Date: Fri, 11 Apr 2008 09:47:43 +0100
From: [EMAIL PROTECTED]
To: rules-users@lists.jboss.org
I guess the example is a simplification as c (in RHS) has not been bound
to a fact.
Anyway, that aside, do you call update to ensure WM knows of changes to
facts otherwise properties need to be time-constant which in your example
they are not.
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Guéhenneux
Sent: 11 April 2008 09:34
To: Rules Users List
Subject: [rules-users] Synch Business Object / Working Memory
Hi,
I have two rules :
rule rule 1 - 1
salience 90
ruleflow-group rfg1
when
a : A(
eComputed == false,
c 15,
d = 75)
then
c.setE(0);
end
rule rule 1 - 2
salience 10
ruleflow-group rfg1
when
a : A(
eComputed == false,
c = 15,
d = 75)
then
c.setE(1);
end
and part of the corresponding business code :
public class A {
...
public String getEComputed(){
if(eComputed)
return true;
else
return false;
}
...
public void setE(int e){
this.e = e;
eComputed = true;
}
...
}
so, I expected that if the first rule is activated, the second won't be. But
according to my tests, the two rule can be fired on the same object A.
While debugging, I noticed the getEComputed method was only called once. I
suppose that I should write this :
rule rule 1 - 1
salience 90
ruleflow-group rfg1
when
a : A(
eComputed == false,
c 15,
d = 75)
then
c.setE(0);
c.setEComputed(true);
end
rule rule 1 - 2
salience 10
ruleflow-group rfg1
when
a : A(
eComputed == false,
c = 15,
d = 75)
then
c.setE(1);
c.setEComputed(true);
end
But I would prefer another solution. Thanks for help.
_
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RE: [rules-users] Synch Business Object / Working Memory
I was thinking something more like this:-
package com.sample
import com.sample.Test
rule rule 1 - 1
salience 90
when
a : Test(
computed == false,
c 15,
d = 75)
then
System.out.println(setting e to 0);
a.setE(0);
update(a);
end
rule rule 1 - 2
salience 10
when
a : Test(
computed == false,
c 15,
d = 75)
then
System.out.println(setting e to 1);
a.setE(1);
end
Note rule rule 1 - 2 deliberately uses the same patterns as rule rule 1 -
1.
package com.sample;
public class Test {
private boolean computed =false;
private int c=0;
private int d=80;
private int e;
public String getComputed(){
if(computed)
return true;
else
return false;
}
public int getC() {
return c;
}
public int getD() {
return d;
}
public void setE(int e){
this.e = e;
computed = true;
}
}
Rule rule 1 - 1 is the only rule to run (and runs once); the second
activatino being cancelled due to the update to computed. Here's the audit
view:-
object-stream
list
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 1 [1]/activationId
rulerule 1 - 1/rule
declarations[EMAIL PROTECTED](1)/declarations
type4/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 2 [1]/activationId
rulerule 1 - 2/rule
declarations[EMAIL PROTECTED](1)/declarations
type4/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ObjectLogEvent
factId1/factId
objectToString[EMAIL PROTECTED]/objectToString
type1/type
/org.drools.audit.event.ObjectLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 1 [1]/activationId
rulerule 1 - 1/rule
declarations[EMAIL PROTECTED](1)/declarations
type6/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 2 [1]/activationId
rulerule 1 - 2/rule
declarations[EMAIL PROTECTED](1)/declarations
type5/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ObjectLogEvent
factId1/factId
objectToString[EMAIL PROTECTED]/objectToString
type2/type
/org.drools.audit.event.ObjectLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 1 [1]/activationId
rulerule 1 - 1/rule
declarations[EMAIL PROTECTED](1)/declarations
type7/type
/org.drools.audit.event.ActivationLogEvent
/list
/object-stream
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Guéhenneux
Sent: 11 April 2008 11:33
To: Rules Users List
Subject: RE: [rules-users] Synch Business Object / Working Memory
Ok, I think I understood well. I modified my business code, now I call if
(wm != null)
wm.update(wm.getFactHandle(this), this);
each time a properties is modified.
But it is worse. Rules that sould be activated only once actually loop, even
if I add the no-loop clause.
I understand why they loop, assuming update = (rectact + insert), but I dont
get a solution to my problem. I just want to notify an object changement in
order to read again the properties, but I dont want to restart the ruleflow.
Sorry, but I find hard to say it in english because even in french, it's not
very clear ;)
_
Subject: RE: [rules-users] Synch Business Object / Working Memory
Date: Fri, 11 Apr 2008 10:39:41 +0100
From: [EMAIL PROTECTED]
To: rules-users@lists.jboss.org
In essence, yes. Have a look at update in the manual (and a read on Shadow
Facts will probably be useful too).
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Guéhenneux
Sent: 11 April 2008 10:24
To: Rules Users List
Subject: RE: [rules-users] Synch Business Object / Working Memory
yes, i made a mistake. its a.setE(...) and not c.setE(...).
I don't call update. If I dont call update, properties of an object are just
read one time for all rules?
_
Subject: RE: [rules-users] Synch Business Object / Working Memory
Date: Fri, 11 Apr 2008 09:47:43 +0100
From: [EMAIL PROTECTED]
To: rules-users@lists.jboss.org
I guess the example is a simplification as c (in RHS) has not been bound
to a fact.
Anyway, that aside, do you call update to ensure WM knows of changes to
facts otherwise properties need to be time-constant which in your example
they are not.
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Guéhenneux
Sent: 11 April 2008 09:34
To: Rules Users List
Subject: [rules-users] Synch Business Object / Working Memory
Hi,
I have two rules :
rule rule 1 - 1
salience 90
ruleflow-group rfg1
when
RE: [rules-users] modify()
I've got 4.0.5 and it mentions insert, update and retract throughout the manual. There was an API change some versions ago, but I forget when exactly. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of X10 Sent: 11 April 2008 12:34 To: Rules Users List Subject: [rules-users] modify() Hi, I take it the modify() that's in the manual got replaced by update()? Christine ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Synch Business Object / Working Memory
Do you need ruleflow? Perhaps this is too simple and I misunderstood.
package com.sample;
public class Test {
private Integer a;
private Integer b;
private Integer c;
public Integer getA() {
return a;
}
public Integer getB() {
return b;
}
public Integer getC() {
return c;
}
public void setA(Integer a) {
this.a = a;
}
public void setB(Integer b) {
this.b = b;
}
public void setC(Integer c) {
this.c = c;
}
}
package com.sample
import com.sample.Test
rule rule 1
salience 90
when
a : Test( a != null, b == null )
then
System.out.println(setting b to 10);
a.setB(10);
update(a);
end
rule rule 2
salience 80
when
a : Test( b : b != null, c == null )
then
System.out.println(setting c to b x 5);
a.setC(b * 5);
update(a);
end
rule rule 3
salience 70
when
a : Test( c != null )
then
System.out.println(c = + a.getC());
end
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Guéhenneux
Sent: 11 April 2008 13:23
To: Rules Users List
Subject: RE: [rules-users] Synch Business Object / Working Memory
Indeed, it works but I will have to use such booleans for a lot of rules.
Cause my rule flow is schematically :
compute A
compute B(A)
compute C(B)
...
Perhaps I may create several ruleflows, one per independant computing?
_
Subject: RE: [rules-users] Synch Business Object / Working Memory
Date: Fri, 11 Apr 2008 12:11:32 +0100
From: [EMAIL PROTECTED]
To: rules-users@lists.jboss.org
I was thinking something more like this:-
package com.sample
import com.sample.Test
rule rule 1 - 1
salience 90
when
a : Test(
computed == false,
c 15,
d = 75)
then
System.out.println(setting e to 0);
a.setE(0);
update(a);
end
rule rule 1 - 2
salience 10
when
a : Test(
computed == false,
c 15,
d = 75)
then
System.out.println(setting e to 1);
a.setE(1);
end
Note rule rule 1 - 2 deliberately uses the same patterns as rule rule 1 -
1.
package com.sample;
public class Test {
private boolean computed =false;
private int c=0;
private int d=80;
private int e;
public String getComputed(){
if(computed)
return true;
else
return false;
}
public int getC() {
return c;
}
public int getD() {
return d;
}
public void setE(int e){
this.e = e;
computed = true;
}
}
Rule rule 1 - 1 is the only rule to run (and runs once); the second
activatino being cancelled due to the update to computed. Here's the audit
view:-
object-stream
list
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 1 [1]/activationId
rulerule 1 - 1/rule
declarations[EMAIL PROTECTED](1)/declarations
type4/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 2 [1]/activationId
rulerule 1 - 2/rule
declarations[EMAIL PROTECTED](1)/declarations
type4/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ObjectLogEvent
factId1/factId
objectToString[EMAIL PROTECTED]/objectToString
type1/type
/org.drools.audit.event.ObjectLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 1 [1]/activationId
rulerule 1 - 1/rule
declarations[EMAIL PROTECTED](1)/declarations
type6/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 2 [1]/activationId
rulerule 1 - 2/rule
declarations[EMAIL PROTECTED](1)/declarations
type5/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ObjectLogEvent
factId1/factId
objectToString[EMAIL PROTECTED]/objectToString
type2/type
/org.drools.audit.event.ObjectLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 1 [1]/activationId
rulerule 1 - 1/rule
declarations[EMAIL PROTECTED](1)/declarations
type7/type
/org.drools.audit.event.ActivationLogEvent
/list
/object-stream
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Guéhenneux
Sent: 11 April 2008 11:33
To: Rules Users List
Subject: RE: [rules-users] Synch Business Object / Working Memory
Ok, I think I understood well. I modified my business code, now I call if
(wm != null)
wm.update(wm.getFactHandle(this), this);
each time a properties is modified.
But it is worse. Rules that sould be activated only once actually loop, even
if I add the no-loop clause.
I understand why they loop,
RE: [rules-users] Synch Business Object / Working Memory
I am confident Drools supports what you are looking for; did you try
update() - or modify() - in the then part of the rule (and not in Java as
you code snippet)?
Can you explain more the need for the computed flag on the fact? Is the
value of a property set sometimes whilst calculated at other times?
Stick with both Drools and the group - we'll get you to where you want to
be.
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Guéhenneux
Sent: 11 April 2008 15:41
To: Rules Users List
Subject: RE: [rules-users] Synch Business Object / Working Memory
First, thank you for yours answers which are very clear. Your solution will
probably work. I'm just desapointed that there is no way to synchronized the
shadow with the object. That would be great for my work.
_
Subject: RE: [rules-users] Synch Business Object / Working Memory
Date: Fri, 11 Apr 2008 14:57:52 +0100
From: [EMAIL PROTECTED]
To: rules-users@lists.jboss.org
Do you need ruleflow? Perhaps this is too simple and I misunderstood.
package com.sample;
public class Test {
private Integer a;
private Integer b;
private Integer c;
public Integer getA() {
return a;
}
public Integer getB() {
return b;
}
public Integer getC() {
return c;
}
public void setA(Integer a) {
this.a = a;
}
public void setB(Integer b) {
this.b = b;
}
public void setC(Integer c) {
this.c = c;
}
}
package com.sample
import com.sample.Test
rule rule 1
salience 90
when
a : Test( a != null, b == null )
then
System.out.println(setting b to 10);
a.setB(10);
update(a);
end
rule rule 2
salience 80
when
a : Test( b : b != null, c == null )
then
System.out.println(setting c to b x 5);
a.setC(b * 5);
update(a);
end
rule rule 3
salience 70
when
a : Test( c != null )
then
System.out.println(c = + a.getC());
end
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jonathan
Guéhenneux
Sent: 11 April 2008 13:23
To: Rules Users List
Subject: RE: [rules-users] Synch Business Object / Working Memory
Indeed, it works but I will have to use such booleans for a lot of rules.
Cause my rule flow is schematically :
compute A
compute B(A)
compute C(B)
...
Perhaps I may create several ruleflows, one per independant computing?
_
Subject: RE: [rules-users] Synch Business Object / Working Memory
Date: Fri, 11 Apr 2008 12:11:32 +0100
From: [EMAIL PROTECTED]
To: rules-users@lists.jboss.org
I was thinking something more like this:-
package com.sample
import com.sample.Test
rule rule 1 - 1
salience 90
when
a : Test(
computed == false,
c 15,
d = 75)
then
System.out.println(setting e to 0);
a.setE(0);
update(a);
end
rule rule 1 - 2
salience 10
when
a : Test(
computed == false,
c 15,
d = 75)
then
System.out.println(setting e to 1);
a.setE(1);
end
Note rule rule 1 - 2 deliberately uses the same patterns as rule rule 1 -
1.
package com.sample;
public class Test {
private boolean computed =false;
private int c=0;
private int d=80;
private int e;
public String getComputed(){
if(computed)
return true;
else
return false;
}
public int getC() {
return c;
}
public int getD() {
return d;
}
public void setE(int e){
this.e = e;
computed = true;
}
}
Rule rule 1 - 1 is the only rule to run (and runs once); the second
activatino being cancelled due to the update to computed. Here's the audit
view:-
object-stream
list
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 1 [1]/activationId
rulerule 1 - 1/rule
declarations[EMAIL PROTECTED](1)/declarations
type4/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 2 [1]/activationId
rulerule 1 - 2/rule
declarations[EMAIL PROTECTED](1)/declarations
type4/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ObjectLogEvent
factId1/factId
objectToString[EMAIL PROTECTED]/objectToString
type1/type
/org.drools.audit.event.ObjectLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 1 [1]/activationId
rulerule 1 - 1/rule
declarations[EMAIL PROTECTED](1)/declarations
type6/type
/org.drools.audit.event.ActivationLogEvent
org.drools.audit.event.ActivationLogEvent
activationIdrule 1 - 2 [1]/activationId
rulerule 1 - 2/rule
declarations[EMAIL PROTECTED](1)/declarations
type5/type
RE: [rules-users] Access to currently executing rule in consequence?
There is an implicit KnowledgeHelper object called drools available in the RHS. drools.getRule().getName() will provide what you need. _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: 11 April 2008 16:04 To: rules-users@lists.jboss.org Subject: [rules-users] Access to currently executing rule in consequence? Is there an easy way to access information about the currently executing rule (e.g. Name, salience, group) within a rule consequence? E.g. rule Sample Rule salience = 100 when $v : Fact(name == Test) then System.out.println(The currently executing rule is + ???.getName()); end I could copy the name into the print but of course then I have it in two places I need to keep in sync. I know I can get the full log but that's not what I'm interested in. -Russ smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] modify()
I *seem* to be able to still use update in the RHS with 4.0.5.
Perhaps I've got my binaries mixed up. If I get the chance I'll do a clean
install.
Thanks for the clarification - I don't want to end up confusing matters with
my help ;-)
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mark Proctor
Sent: 11 April 2008 12:51
To: [EMAIL PROTECTED]; Rules Users List
Subject: Re: [rules-users] modify()
X10 wrote:
Hi,
I take it the modify() that's in the manual got replaced by
update()?
The meanings have changed, but both exist to some degree. modify() is a
specail keyword used in the java/mvel consequence. Inside a consequence
it is the preferred way modify facts, so that the engine is notified.
Outside of consequence, in normal Java, one an object has been changed
you need to notify the engine, this is done via the update() method,
which tells the engine the fact has been updated.
The main difference is that update( handle ) only takes a single
parameter where as modify( object ) { field1 = value1, field2 = value2 }
takes key/value pair comma separated list of setters. the language used
to apply those setters is dependant on whether you are using the mvel or
java dialect.
Mark
Christine
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RE: [rules-users] Ruleflows
IMO, the first. Another answer; I believe RuleFlow controls the activation sequence so IMO yes. Kris, care to correct me? _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jonathan Guéhenneux Sent: 10 April 2008 11:36 To: Rules Users List Subject: [rules-users] Ruleflows Hi, I have to compute the gravity of a debt according to a set of rules organized in a ruleflow. I will have to process about ten thousands debts every minute. There is no dependency between the debts. All the rules are applied to one debt. What is the best strategy? - Insert all the debts, and start the ruleflow process or - (Insert one debt, start the ruleflow process) for each debt Another question: If a rule r1 in the ruleflow group rfg1 is fired on a debt d1, can a second rule r2 in the same ruleflow group be fired on the same debt d1? _ Discutez gratuitement avec vos amis en vidéo ! Téléchargez Messenger, http://www.windowslive.fr/messenger/ c'est gratuit ! smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Short circuiting evaluations on LHS
All facts are matched against all patterns upon insertion into working memory. The (Drools) techniques you describe affect the execution of activations (i.e. RHS) not pattern matching. I think (but it's a vague recollection) however that the sequence of patterns has an affect (so you want most restrictive first and least restrictive last). So my thought would be to try to add a pattern to the start of each rule that checks whether there are more than one survivor before the other (more expensive) patterns. Just a thought from what I recall - I haven't tried it:- rule expensive when ArrayList( size 1 ) from collect( SuperClassOfAllFacts( ) ) someExpensivePattern( ) then something(); end _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Newman, Jason Sent: 03 April 2008 20:07 To: rules-users@lists.jboss.org Subject: [rules-users] Short circuiting evaluations on LHS I am currently using Drools 4.0 to determine the best choice out of a data set based on business rules. The rules eliminate (retract) facts until a single fact survives, and is used for additional processing. I have found Drools to be a great solution for this problem, and plan to role it out for additional survivor rules. My problem is in optimization - this is essentially a batch processing application, and speed is very important (of course it is - show me the case where it isn't, right?). Some of the later evaluations in the rules are fairly expensive (invoking complex queries from the database), and generally apply to only a small set of the use cases. For most use cases, the survivor will have been determined after the first or second rule, so I only want to perform the expensive evaluations if necessary. I have not found a way to avoid or schedule the LHS evaluations from firing when inserting the fact into the working memory. I have played around with agenda groups and rule flows, but haven't had any luck. The only way I can think of at this point is to break my rules into separate rule bases, and manually copy survivors from one working memory to the next, performing my own short circuiting outside of the rules being fired. Is there any other technique that I have missed? From a maintenance standpoint, I would prefer to be able to use one rule base/rule flow to manage the rules (there are only about 10 total rules, so the base is not very large - and I would have to break it into 4 or 5 different rule bases, which seems like it will be a pain across the 5 different areas I need to implement the rules.) Thanks, -Jason The information transmitted (including attachments) is covered by the Electronic Communications Privacy Act, 18 U.S.C. 2510-2521, is intended only for the person(s) or entity/entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient(s) is prohibited. If you received this in error, please contact the sender and delete the material from any computer. smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Rules File Design Consideration
If you cannot combine the rules into new rules I would suggest looking at rule flow. _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chong Minsk Goh Sent: 04 April 2008 10:57 To: rules-users@lists.jboss.org Subject: [rules-users] Rules File Design Consideration Hi, Any help to the problem below is much appreciated : ) Here is the problem: I have a set of rules. Intially these rules are evaluated individually. However, now there is a need to fire these rules in groups which is similar to a logic gate AND or OR. And, the results of this groups of rules are collected and returned to the user/ For example: There are 4 rules: Rule 1 Rule 2 Rule 3 Rule 4 Now, need to evaluate (Rule 1 AND Rule 2 AND Rule 3) OR Rule 4 And I need to know what are the results of Rule 1 to Rule 4 individually. What is the best way to implement a AND or OR using Drools? Best regards Chong Minsk smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Can only reason over sub-objects if you use the FromConditional Element
IMO, you have not informed the engine\RETE network that details have changed in your first example. This would probably be a better example:- rule 30 is the new 20 when person : Person( $d : details.age == 30 ) then person.getDetails().setAge(20); System.out.println( Now 20 : + person ); update( person ); update( $d ); end The From works because it gets external data rather than using that already in the engine\RETE network. IMO, I think the rules are working correctly; it's just a misunderstanding of how the engine\RETE network function. I hope this helps. Thanks, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Aaron Dixon Sent: 14 March 2008 20:51 To: Rules Users List Subject: [rules-users] Can only reason over sub-objects if you use the FromConditional Element It appears that you MUST use the From Condition Element to reason over sub-objects. I have a Person class. Person::getDetails() returns a Details instance, which has the name and age of the person. (This is a contrived example to demonstrate the issue.) My rules are: rule 30 is the new 20 when person : Person( details.age == 30 ) then person.getDetails().setAge(20); System.out.println( Now 20 : + person ); update( person ); end rule Older than 20 - Good salience -100 when person : Person( ) Details( age 20 ) from person.details then System.out.println( Older than 20 (good) : + person ); end rule Older than 20 - Bad salience -100 when person : Person( details.age 20 ) then System.out.println( Older than 20 (bad) : + person ); end I assert Abe, Bob, Cat, Don, and Eve with ages of 10, 20, 30, 40, and 50, respectively. The output is as follows. Now 20 : Person(Details(Cat,20)) Older than 20 (good) : Person(Details(Eve,50)) Older than 20 (bad) : Person(Details(Eve,50)) Older than 20 (good) : Person(Details(Don,40)) Older than 20 (bad) : Person(Details(Don,40)) Older than 20 (bad) : Person(Details(Cat,20)) You can see that the Bad rule is more concise but it does not use the From Conditional Element and therefore it doesn't work properly (Cat is determined to be older than 20 when she is not.) Why does Drools allow the Bad rule to be written and compiled when it does not behave properly? Thanks, Aaron ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] RE: Can I use drools to solve my problem?
I think you misunderstand how rules work.
All Facts inserted into working memory will be compared to all patterns in
all rules; and where a match is found an activation recorded (i.e. LHS
runs).
So the following would group all products of type (if you insert
DelieveryList's into WM and set the type for each list you only need the one
rule):-
rulegroup by type
when
$d : DelieveryList ( $t : productType )
$p : Product( type == $t )
then
$d.add($p)
end
You don't need to iterate with rules; simply add all the objects to WM.
Cheers,
Mike
_
From: KinG CD [mailto:[EMAIL PROTECTED]
Sent: 12 March 2008 19:07
To: Anstis, Michael (M.)
Subject: RE: Can I use drools to solve my problem?
Actually I was able to get near to that, but thank you very much, it cleared
my mind. My problem still is to group things. So I have a list of products
and I want to group them by type. So I want to create N lists for N types,
each list with every product of a certain type.
e.g
Product
-type
-name
-id
===
productList{product1, product2, product3,...,productN}
I want a rule that
rulegroup by type
when
iterate the List and generate a productListbyType grouping all
products of typeN
then
deliveryList.add(productListbyType)
remove each product from the main List(i dont think i really nedd
that)
end
and loop in that rule until list is 'cleared'(all products have been sent to
their right lists.
sorry for bothering you, but i really searched for that and did not found. I
could iterate the list with the from collect bu i dont know how to use an
abstract type, how to iterate for all kind of types. we can have N types.
thank you very much.
_
Subject: RE: Can I use drools to solve my problem?
Date: Mon, 10 Mar 2008 10:21:45 +
From: [EMAIL PROTECTED]
To: rules-users@lists.jboss.org
CC: [EMAIL PROTECTED]
In my opinion it will be much easier if you insert individual Orders and
Products
Here's a hurriedly put together example to help you think in terms of rules
(I have no experience of your problem domain so this might be laughably
wrong):-
Global ArrayList branch1;
rule Delievery split - Branch 1
when
$p : Product( $b : branch = Branch 1 )
$o : Order( products contains $p )
then
OrderDelievery od = new OrderDelievery($o, $p, $b);
insert(od);
end
rule Consolidate delieveries
when
$od : OrderDelievery( branch = Branch 1 )
then
branch1.add($od);
end
Or you could just retrieve the OrderDelievery objects from WM at the end.
Drools can definately achieve what you want. If you can solve the problem
with hard-coded rules you can solve it with Drools.
Good luck,
Mike
_
From: KinG CD [mailto:[EMAIL PROTECTED]
Sent: 07 March 2008 17:08
To: Anstis, Michael (M.)
Subject: RE: Can I use drools to solve my problem?
alright. I was trying not to boder you.
My companie is developing a billing software for a e-commerce site. So we
have an Order and we have to transform it into deliveries. So each Order has
many products and I have to filter it and define X deliveries(i call it
'delivery split'). There are filters like disponibility(in how many days it
will be ok), brach(in what city is the product), type(if it is a kit,
ticket...),...
I tried many ways and i really think that drools isn't the best tool for my
problem. The point is that mi boos dont want to use the hard code for define
the deliveries. He wats drolls to do everything. So i tried inserting the
the order in the WM, and using 'rom' chained with 'collect' i could iterate
and set a list based in some rules, but how can i create lists based on the
branch. how can i group in Y different lists the Z different products i
have.
I also inserted each product manually and tried to manipulate each one. But
the point is that the rules should be interdependent but i was not able to
do it.
the resume is that i want to take the order and set N deliveries based on
interdependent rules. i would like to do almost everything with drools not
using the hard code.
Sorry for the English, thanj you very much for the help, i'm a little lost.
ect: FW: Can I use drools to solve my problem?
Date: Fri, 7 Mar 2008 15:45:22 +
From: [EMAIL PROTECTED]
To: rules-users@lists.jboss.org
CC: [EMAIL PROTECTED]
Posted to forum for a wider audience.
I think you will need to be more specific with your use case.
With kind regards,
Mike
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: 07 March 2008 15:35
To: Anstis, Michael (M.)
Subject: Can I use drools to solve my problem?
I have a list of products and want to divide this list in other lists
applying the rules, than i want to apply the same rules to this new lists.
So I keep dividing them until no rules are applicable anymore.
Thank you
_
Encontre o que você procura com mais eficiência
[rules-users] RE: Can I use drools to solve my problem?
In my opinion it will be much easier if you insert individual Orders and Products Here's a hurriedly put together example to help you think in terms of rules (I have no experience of your problem domain so this might be laughably wrong):- Global ArrayList branch1; rule Delievery split - Branch 1 when $p : Product( $b : branch = Branch 1 ) $o : Order( products contains $p ) then OrderDelievery od = new OrderDelievery($o, $p, $b); insert(od); end rule Consolidate delieveries when $od : OrderDelievery( branch = Branch 1 ) then branch1.add($od); end Or you could just retrieve the OrderDelievery objects from WM at the end. Drools can definately achieve what you want. If you can solve the problem with hard-coded rules you can solve it with Drools. Good luck, Mike _ From: KinG CD [mailto:[EMAIL PROTECTED] Sent: 07 March 2008 17:08 To: Anstis, Michael (M.) Subject: RE: Can I use drools to solve my problem? alright. I was trying not to boder you. My companie is developing a billing software for a e-commerce site. So we have an Order and we have to transform it into deliveries. So each Order has many products and I have to filter it and define X deliveries(i call it 'delivery split'). There are filters like disponibility(in how many days it will be ok), brach(in what city is the product), type(if it is a kit, ticket...),... I tried many ways and i really think that drools isn't the best tool for my problem. The point is that mi boos dont want to use the hard code for define the deliveries. He wats drolls to do everything. So i tried inserting the the order in the WM, and using 'rom' chained with 'collect' i could iterate and set a list based in some rules, but how can i create lists based on the branch. how can i group in Y different lists the Z different products i have. I also inserted each product manually and tried to manipulate each one. But the point is that the rules should be interdependent but i was not able to do it. the resume is that i want to take the order and set N deliveries based on interdependent rules. i would like to do almost everything with drools not using the hard code. Sorry for the English, thanj you very much for the help, i'm a little lost. ect: FW: Can I use drools to solve my problem? Date: Fri, 7 Mar 2008 15:45:22 + From: [EMAIL PROTECTED] To: rules-users@lists.jboss.org CC: [EMAIL PROTECTED] Posted to forum for a wider audience. I think you will need to be more specific with your use case. With kind regards, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 07 March 2008 15:35 To: Anstis, Michael (M.) Subject: Can I use drools to solve my problem? I have a list of products and want to divide this list in other lists applying the rules, than i want to apply the same rules to this new lists. So I keep dividing them until no rules are applicable anymore. Thank you _ Encontre o que você procura com mais eficiência! Instale já a Barra de Ferramentas com Windows Desktop Search! É GRÁTIS! http://www.windowslive.com.br smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Making my own agenda Filter
Your anonymous sub-class isn't entered or it doesn't run as expected?
In your accept override you compare object references - type == AGENDA.
Is this what you really want?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mehak
Sent: 10 March 2008 13:49
To: rules-users@lists.jboss.org
Subject: [rules-users] Making my own agenda Filter
Hi I am using this code to make my own agenda filter. In this case if the
type of rule is agenda then agenda filter to focus on that agenda is set
else agenda filter for rule is set.
private static AgendaFilter buildAgendaFilter(RuleConfig rule)
{ final String searchName = rule.getRuleName();
final String type = rule.getRuleType();
AgendaFilter filter = new AgendaFilter() // The control doesnt go
inside
this code
{
public boolean accept(Activation activation)
{ if(type == AGENDA)
{
if((activation.getRule().getAgendaGroup()).equalsIgnoreCase(searchName))
{ System.out.println(searchName);
return true;
}
return false;
}
else
{
if((activation.getRule().getName()).equalsIgnoreCase(searchName))
{
return true;
}
return false;
}
}
};
return filter;
The problem is that the control doesnt go inside the new agenda creation.
Please let me know if something is wrong with the way I have used it.
Thanks
--
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[rules-users] FW: Can I use drools to solve my problem?
Posted to forum for a wider audience. I think you will need to be more specific with your use case. With kind regards, Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 07 March 2008 15:35 To: Anstis, Michael (M.) Subject: Can I use drools to solve my problem? I have a list of products and want to divide this list in other lists applying the rules, than i want to apply the same rules to this new lists. So I keep dividing them until no rules are applicable anymore. Thank you smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Plz reply : Descending order rule
Are you sure you only have three facts? Your original resultset showed Order value=5 which is not in the dataset shown in your most recent email. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Barath Sent: 21 February 2008 10:34 To: rules-users@lists.jboss.org Subject: Re: [rules-users] Plz reply : Descending order rule Hi, Let me say my understanding about this rule... rule Descending order when $a : Order( $value : value ) not Order( value $value) then System.out.println(value :+$value); retract($a); end 1. Order value=1let this be A 2. Order value=2let this be B 3. Order value=3let this be C Case 1 : $a : Order($value : 1) not Order(2 1) So this rule is True. Case 2 : $a : Order($value : 1) not Order(3 1) So this rule is True. Case 3 : $a : Order($value : 2) not Order(2 3) So this rule is True. Case 4 : $a : Order($value : 2) not Order(2 1) So this rule is False. Case 5 : $a : Order($value : 3) not Order(3 1) So this rule is False. Case 6 : $a : Order($value : 3) not Order(3 2) So this rule is False. This indicates the rule should fire for three times but its not the case. I know i going wrong some where but i couldn't figure out. Plz do help me. Barath. Barath wrote: Hi, Can u explain me the rule flow for the below rule ?. This will help me to get some clear idea about rules. rule Descending order when $a : Order( $value : value ) not Order( value $value) then System.out.println(value :+$value); retract($a); end I am having the following , 1. Order value=1 2. Order value=2 3. Order value=3 4. Order value=4 5. Order value=5 Can u explain the flow(when part) for this 5 object ? Note my understanding(in when) : 1st line take one order object 2nd line check for any other object with grater 'value' But i dont know sequence in which the objects are taken. Plz do reply.. Thanks in advance, Barath. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- View this message in context: http://www.nabble.com/Plz-reply-%3A-Descending-order-rule-tp15606103p1560726 1.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] Plz reply : Descending order rule
Code:-
public static final void main(String[] args) {
...
WorkingMemory wm = ruleBase.newStatefulSession();
wm.insert(new Order(1));
wm.insert(new Order(2));
wm.insert(new Order(3));
wm.fireAllRules();
...
}
Rule:-
rule Descending order
when
$a : Order( $value : value )
not Order( value $value)
then
System.out.println(value :+$value);
retract($a);
end
Gives:-
value :3
value :2
value :1
I agree with Scott, is there something else afoot?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Christian Spurk
Sent: 21 February 2008 13:20
To: Rules Users List
Subject: Re: [rules-users] Plz reply : Descending order rule
Hi Barath!
Barath wrote:
This indicates the rule should fire for three times but its not the case.
Looking at your last e-mail only: as far as I can see, the rule indeed
fires exactly three times ... It prints the following:
value :3
value :2
value :1
Probably I don't quite understand the problem? Or maybe your actual
problem does not occur in this simple testcase?
Best,
Christian
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RE: [rules-users] Plz reply : Descending order rule
Sorry I agree with Christian not Scott!
I will try to refer to the correct email in my inbox next time ;-)
-Original Message-
From: Anstis, Michael (M.)
Sent: 21 February 2008 14:00
To: 'Rules Users List'
Subject: RE: [rules-users] Plz reply : Descending order rule
Code:-
public static final void main(String[] args) {
...
WorkingMemory wm = ruleBase.newStatefulSession();
wm.insert(new Order(1));
wm.insert(new Order(2));
wm.insert(new Order(3));
wm.fireAllRules();
...
}
Rule:-
rule Descending order
when
$a : Order( $value : value )
not Order( value $value)
then
System.out.println(value :+$value);
retract($a);
end
Gives:-
value :3
value :2
value :1
I agree with Scott, is there something else afoot?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Christian Spurk
Sent: 21 February 2008 13:20
To: Rules Users List
Subject: Re: [rules-users] Plz reply : Descending order rule
Hi Barath!
Barath wrote:
This indicates the rule should fire for three times but its not the case.
Looking at your last e-mail only: as far as I can see, the rule indeed
fires exactly three times ... It prints the following:
value :3
value :2
value :1
Probably I don't quite understand the problem? Or maybe your actual
problem does not occur in this simple testcase?
Best,
Christian
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RE: Re[rules-users] te Tree view ... tutorial?
2.4. Rete Algorithm in the manual provides some insight. Let the group know whether this satisfies your curiosity - otherwise Google for Dr. Charles Forgy or RETE for detailed stuff. Don't forget Drools is based upon RETE but has many enhancements. Happy reading Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Noc2 Sent: 11 February 2008 15:30 To: rules-users@lists.jboss.org Subject: Re[rules-users] te Tree view ... tutorial? hello all, as newbie to drools, i was working with rule files when i accidentally found the Rete Tree View. Curious as i am, i went searching on the net on how to read this thing. I have found some information on what it is, but unfortenatly, when i try to link the information to the real life situation, i realized that some things didnt match. So i am still looking for a nice tutorial or explanation of the Rete Tree view. Anybody that could help me? All suggestions are welcome. Thanks in advance, Noc2 -- View this message in context: http://www.nabble.com/Rete-Tree-view-...-tutorial--tp15413110p15413110.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users smime.p7s Description: S/MIME cryptographic signature ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] compare string and int in LHS
You could use an inline eval too.
The problem possibly lies more with your model; why not have one subclass
expose the String property and another the Integer property and code the
rules using the subclasses? Much safer throughout the entire application
than having to worry whether some field is meant to be a string or number
(It's very easy to question problems though - there could be very good
reason why you need the model as is).
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of brenner
Sent: 08 February 2008 12:33
To: rules-users@lists.jboss.org
Subject: Re: [rules-users] compare string and int in LHS
Hi,
I have found a solution, but I don't know that it is the best:
My solution:
I have extend my Class with a method which returns the string as a integer.
And my rule is like this:
i : Integer( intValue = 1) from $test.getValue(Test.VALUE_TYP_INTEGER);
Is that the only/best solution.
Can't I convert Strings to Integer on the LHS of a rule?
greeting
Daniel
brenner wrote:
Hi,
I have a class, wich contains a string value. This value is in some use
cases an integer.
For this use case I want to convert (parse) the string typ to an integer
because I want that the following rule matches:
rule
when
t : Test(value = 1)
then
System.out.println(t)
end
class Test {
String value;
getValue();
setValue();
}
Have anyone a solution or some help for me?
Is that possible what I want to do?
Thanks
Daniel
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