Re: [rules-users] Help -- Conditional Logic in DRL
Note to drools devs: I didn't put the original poster up to this. :)
Globals should be considered immutable, so shouldn't be used in this way. You
could do it with an object asserted in working memory, though.
Just as good, though, you can use this kind of pattern to replicate else logic:
rule EverythingMatches
when
Condition0
Condition1
Condition2
then
...
end
rule ElseAtCondition2
when
Condition0
Condition1
!Condition2
then
...
end
rule ElseAtCondition1
when
Condition0
!Condition1
then
...
end
rule ElseAtCondition0
when
!Condition0
then
...
end
--- On Mon, 6/15/09, Scott Reed sr...@avacoda.com wrote:
From: Scott Reed sr...@avacoda.com
Subject: Re: [rules-users] Help -- Conditional Logic in DRL
To: Rules Users List rules-users@lists.jboss.org
Date: Monday, June 15, 2009, 10:19 PM
Looks like 5 rules with a global flag
might work:
global boolean flag = false;
rule name1
when
(condition1 == true )
(flag == false)
then
consequence1();
flag = true;
end
...
rule name5
when
(condition5 == true )
(flag == false)
then
consequence5();
flag = true;
end
Does that work for you?
Vishy [6/15/2009 11:06 PM] wrote:
Hi All,
I am new to drools...and am trying to figure out as to
how I can
represent the following logic in a DRL file.
if (condition1) {
if (condition2) {
} else if (condition3) {
} else if (condition 4) {
} else if (condition 5) {
}
}
In DSL, a typical rule is represented as follows:
rule name
when
condition is true
then
consequence
end
How can I represent the above mentioned if - else
logic in DSL? Or is
it not possible?
If it is not, can you please suggest any alternative?
Thanks much!!
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Re: [rules-users] Help -- Conditional Logic in DRL
Using a fact as a guard to block alternatives is tricky. For one thing, you
cannot use a single global fact. (When would you reset this fact to the
initial state so that the whole mechanism can work again for the next fact
set to be processed by this rule set?) So, you might consider inserting a
flag fact along with one of the facts playing the key role in all of the
conditions. But what if the participating facts change, and this if set
should be activated again? How would you reset or recreate the flag fact?
Also, the precedence implied by the ordering of the else branches would have
to be expressed in the rules, using salience.
So, the solution Greg has outlined is the one to pursue. As a general rule,
keep in mind that
if( cond ){
...;
} else {
assert( ! cond );
...;
}
and
if( cond1){ if( cond2 ){ assert( cond1 cond2 );...;
Thus, you can collect the precondition for each if branch that is to become
a consequence of a rule, and the corresponding precondition is to be
implemented as the left hand side.
-W
On 6/16/09, Greg Barton greg_bar...@yahoo.com wrote:
Note to drools devs: I didn't put the original poster up to this. :)
Globals should be considered immutable, so shouldn't be used in this way.
You could do it with an object asserted in working memory, though.
Just as good, though, you can use this kind of pattern to replicate else
logic:
rule EverythingMatches
when
Condition0
Condition1
Condition2
then
...
end
rule ElseAtCondition2
when
Condition0
Condition1
!Condition2
then
...
end
rule ElseAtCondition1
when
Condition0
!Condition1
then
...
end
rule ElseAtCondition0
when
!Condition0
then
...
end
--- On Mon, 6/15/09, Scott Reed sr...@avacoda.com wrote:
From: Scott Reed sr...@avacoda.com
Subject: Re: [rules-users] Help -- Conditional Logic in DRL
To: Rules Users List rules-users@lists.jboss.org
Date: Monday, June 15, 2009, 10:19 PM
Looks like 5 rules with a global flag
might work:
global boolean flag = false;
rule name1
when
(condition1 == true )
(flag == false)
then
consequence1();
flag = true;
end
...
rule name5
when
(condition5 == true )
(flag == false)
then
consequence5();
flag = true;
end
Does that work for you?
Vishy [6/15/2009 11:06 PM] wrote:
Hi All,
I am new to drools...and am trying to figure out as to
how I can
represent the following logic in a DRL file.
if (condition1) {
if (condition2) {
} else if (condition3) {
} else if (condition 4) {
} else if (condition 5) {
}
}
In DSL, a typical rule is represented as follows:
rule name
when
condition is true
then
consequence
end
How can I represent the above mentioned if - else
logic in DSL? Or is
it not possible?
If it is not, can you please suggest any alternative?
Thanks much!!
___
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
___
rules-users mailing list
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https://lists.jboss.org/mailman/listinfo/rules-users
___
rules-users mailing list
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https://lists.jboss.org/mailman/listinfo/rules-users
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Re: [rules-users] Drools v5 multithreading questions
It's here: https://jira.jboss.org/jira/browse/JBRULES-2125 2009/6/15 Edson Tirelli tire...@post.com Andrey, May I ask you please to open a JIRA with the info from your e-mail? I will investigate this. Thanks, Edson 2009/6/15 Andrey Nechaev nechaev.and...@gmail.com Hello, All! I’m evaluating the new version of Drools (5.0.1), so I’m especially interested in multithreading and partitioning options, implemented in Drools v5. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] [#JBRULES-1946] Deserializing a KnowledgeBase object throws a java.io.EOFException
Hello Rick, I confirm, that implementations - DroolsObjectOutputStream and DroolsObjectInputStream work well, but it's not applicable in my case, because I depend on external component, that is responsible for storing my data and it uses standard serialization mechanisms. Of course, I may do some workarounds that for example first serialize the stream using Drools implementation and then pass it to the external component, but I prefer to try to do it as it should be. If I don't manage to, I will think about some other ways. Anyway, thank you for your response and advice. Best regards, Przemysław Różycki Rick Lacy pisze: I haven't actually tested this with your example yet, but I recall having a similar problem. I notice you are using the raw java.io.ObjectInputStream and java.io.ObjectOutputStream. I think what I did was switch to org.drools.common.DroolsObjectInputStream and org.drools.common.DroolsObjectOutputStream. Have you tried it with these yet? Regards, Rick On 6/15/09, *Przemysław Różycki* p.rozy...@amg.net.pl mailto:p.rozy...@amg.net.pl wrote: Hello, IMHO, this bug still occurs in 5.0.1 final version as well as in trunk. I put the proper comment and example code in JIRA: https://jira.jboss.org/jira/browse/JBRULES-1946 I need it working quite quickly, so if the Drools developers plan to solve it later, then I will try to look at the source code by myself and find the solution (and share of course). However I would like to ask if anyone tried to diagnose the problem earlier and has some thoughts where to look for the cause? Best regards, -- Przemysław Różycki Architekt IT AMG.net, A Bull Group Company ul. Łąkowa 29 90-554 Łódź tel.: (+48 42) 296 11 82 GSM: (+48) 510 022 612 jid: p.rozy...@amg.net.pl mailto:p.rozy...@amg.net.pl GG: 145116 www.amg.net.pl http://www.amg.net.pl/ Treść niniejszej wiadomości może być poufna. Jeżeli nie jesteście Państwo jej adresatem, to rozprowadzanie lub wykorzystywanie zawartych tu informacji jest zabronione. This e-mail contains material that is confidential for the sole use of the intended recipient. Any review, reliance or distribution by others or forwarding without express permission is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. ___ rules-users mailing list rules-users@lists.jboss.org mailto: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 -- Przemysław Różycki IT Architect AMG.net, A Bull Group Company ul. Łąkowa 29 90-554 Łódź www.amg.net.pl ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Extend Guvnor
Hi all, Long time user of Drools (dated back in xml syntax days). We are looking to revamp our in house rules product which is based on Drools 3.x. We have built a Swing thick client that provides similar functionality as Guvnor such as rule editing, versioning, deployment (with approval system). One major feature we do have is rule simulation. We allow user to simulate rules and display results while user save or seek approval of their rules before deploy to production system. The simulation feature allows user to run against production or testing environment to ensure it provide correct results. I wonder if Guvnor has such extensibility interface build in which I could add my own functionality such as simulation and result browsing? Since Guvnor is based on Seam and GWT (i think), I could probably fork the source and tweak the UI, but I much rather code against an interface supported by Drools. Thoughts? TIA. PS: I am curious how are existing Drools user test their rules currently? Andy ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Help -- Conditional Logic in DRL
Greg,
Thanks much for your suggestion...I think this will help!!
Should have thought of this approach, before posting...
Thanks again!
Greg Barton wrote:
Note to drools devs: I didn't put the original poster up to this. :)
Globals should be considered immutable, so shouldn't be used in this way.
You could do it with an object asserted in working memory, though.
Just as good, though, you can use this kind of pattern to replicate else
logic:
rule EverythingMatches
when
Condition0
Condition1
Condition2
then
...
end
rule ElseAtCondition2
when
Condition0
Condition1
!Condition2
then
...
end
rule ElseAtCondition1
when
Condition0
!Condition1
then
...
end
rule ElseAtCondition0
when
!Condition0
then
...
end
--- On Mon, 6/15/09, Scott Reed sr...@avacoda.com wrote:
From: Scott Reed sr...@avacoda.com
Subject: Re: [rules-users] Help -- Conditional Logic in DRL
To: Rules Users List rules-users@lists.jboss.org
Date: Monday, June 15, 2009, 10:19 PM
Looks like 5 rules with a global flag
might work:
global boolean flag = false;
rule name1
when
(condition1 == true )
(flag == false)
then
consequence1();
flag = true;
end
...
rule name5
when
(condition5 == true )
(flag == false)
then
consequence5();
flag = true;
end
Does that work for you?
Vishy [6/15/2009 11:06 PM] wrote:
Hi All,
I am new to drools...and am trying to figure out as to
how I can
represent the following logic in a DRL file.
if (condition1) {
if (condition2) {
} else if (condition3) {
} else if (condition 4) {
} else if (condition 5) {
}
}
In DSL, a typical rule is represented as follows:
rule name
when
condition is true
then
consequence
end
How can I represent the above mentioned if - else
logic in DSL? Or is
it not possible?
If it is not, can you please suggest any alternative?
Thanks much!!
___
rules-users mailing list
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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
___
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https://lists.jboss.org/mailman/listinfo/rules-users
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Re: [rules-users] Web based decision tables
I'm exporting the table and I'd like to use the xml that represents the web-based decision table to generate the DRL. Copying the source that can be displayed by Guvnor will not suffice for my purposes. Michael Rhoden wrote: Are you exporting the DRL or just using the view source from guvnor? The view source doesn't show the model that must be defined, among other things. I havent used the eclipse plugin much but Guvnor itself, has it's own pseudo model for handling Web Decision tables. When you finally generate a package it will generate correct DRL (not BRL/DT) of that decision table and should have everything you need to run it outside of Guvnor. BRL and DT will always create DRL when you export the package. So my guess is you should use KB.add on a DRL resource type. -Michael - Original Message - From: Dan Seaver dan.sea...@ge.com To: rules-users@lists.jboss.org Sent: Monday, June 15, 2009 3:32:48 PM GMT -06:00 US/Canada Central Subject: [rules-users] Web based decision tables Can someone tell me the appropriate way to use web-based decision tables? They seem to work fine if I create them in Guvnor, and then build and deploy the binary package from Guvnor. However, if I copy the gdst from Guvnor to Eclipse and use KnowledgeBuilder.add to attempt to add the resource as a DTABLE or BRL resource type, I get a NullPointerException or CannotResolveClassException. Any help would be appreciated. Thanks, Dan -- View this message in context: http://www.nabble.com/Web-based-decision-tables-tp24042079p24042079.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/Web-based-decision-tables-tp24042079p24055684.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
Re: [rules-users] Extend Guvnor
Andy Mei wrote: Hi all, Long time user of Drools (dated back in xml syntax days). We are looking to revamp our in house rules product which is based on Drools 3.x. We have built a Swing thick client that provides similar functionality as Guvnor such as rule editing, versioning, deployment (with approval system). One major feature we do have is rule simulation. We allow user to simulate rules and display results while user save or seek approval of their rules before deploy to production system. The simulation feature allows user to run against production or testing environment to ensure it provide correct results. I wonder if Guvnor has such extensibility interface build in which I could add my own functionality such as simulation and result browsing? Since Guvnor is based on Seam and GWT (i think), I could probably fork the source and tweak the UI, but I much rather code against an interface supported by Drools. Thoughts? TIA. PS: I am curious how are existing Drools user test their rules currently? Guvnor has a simple scenario tester in the QA section. that allows you to run some rules against a set of data and asserting the expected results. I'm currently working on a more complete framework, although just the backend api at the moment, for simulation and testing. I hope to have something usable in the next few days. I think the initial plan is to map it to an DSL in MVEL and also to maybe do a mapping to a spreadsheet metaphor. The simulation impl I'm doing will be very complete and allow for testing of rules, workflow and event processing. I'll blog about it once something is ready. Not sure how this will plug into guvnor, other than the uploading and displaying of spreadsheets. One idea is to have a chronoscope time line, which displays all the steps and when they are suppose to happen. If you select a step, it shows the MVEL DSL fragment for that step which can be edited - just simple text area. After that works, we can probably work on various GUI editors for the step segments. Mark http://blog.athico.com Drools Blog. Andy ___ 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] 3rd CfP RuleML-2009 - Deadline extended June 28th
[Apologies for multiple postings] Call for Papers RuleML 2009 3rd International Symposium on Rules, Applications and Interoperability November 5-7 2009, Las Vegas, Nevada, USA http://2009.ruleml.org/ co-located with the 12th Business Rules Forum ** * Latest News ** ** Submission Deadline (extended) June 28th ** * ** * Keynote by Sandro Hawke, W3C RIF - The Future of Rule Interchange** * New categories in the Challenge with prestigious prizes ** * Rules standards session, W3C RIF workshop, lunch panel on Web Rules* * Student grants of the value of up to $1000 plus free registration ** ** Supported by === W3C, OMG, ACM, AAAI, ECCAI, IAAIL, ACM, Belgian Business Rules Forum MIT Sloan CIO Symposium, EPTS, BPM Forum Belgium Sponsored by === Franz Inc NICTA (National ICT Australia) Ltd Corporate Semantic Web Logic Programming Associated Ltd ruleCore JBoss Modelsystems Ltd === Overview and Aim === The International Symposium on Rules, Applications and Interoperability has evolved from an annual series of international workshops since 2002, international conferences in 2005 and 2006, and international symposia since 2007. This year, the 3rd International Symposium on Rules, Applications and Interoperability (RuleML-2009) takes place in Las Vegas, Nevada, USA, collocated with the 12th Business Rules Forum, the world's largest Business Rules event. RuleML-2009 is devoted to practical distributed rule technologies and rule-based applications which need language standards for rules (inter)operating in, e.g., the Semantic Web, Multi-Agent Systems, Event-Driven Architectures, and Service-Oriented Applications. The main goal of RuleML-2009 is to stimulate the cooperation and interoperability between business and research, by bringing together rule system providers, participants in rule standardization efforts, open source communities, practitioners, and researchers. The concept of the symposium has also advanced continuously in the face of extremely rapid progress in practical rule and event processing technologies. As a result, RuleML-2009 will feature hands-on demonstrations and challenges alongside a wide range of thematic tracks, and thus will be an exciting venue to exchange new ideas and experiences on all issues related to the engineering, management, integration, interoperation and interchange of rules in open distributed environments such as the Web. Conference Theme === This year, we particularly welcome submissions that address applications of Web rule technologies for business and information systems. We invite you to share your ideas, results, and experiences: as an industry practitioner, rule system provider, technical expert and developer, rule user or researcher, exploring foundations, developing systems and applications, or using rule-based systems. We invite high-quality submissions related to (but not limited to) one or more of the following topics: Track Topics Rule Transformation and Extraction - Transformation and extraction with rule standards, such as SBVR, RIF and OCL - Extraction of rules from code - Transformation and extraction in the context of frameworks such as KDM (Knowledge Discovery meta-model) - Extraction of rules from natural language - Transformation or rules from one dialect into another Rules and Uncertainty - Languages for the formalization of uncertainty rules - Probabilistic, fuzzy and other rule frameworks for reasoning with uncertain or incomplete information - Handling inconsistent or disparate rules using uncertainty - Uncertainty extensions of event processing rules, business rules, reactive rules, causal rules, derivation rules, association rules, or transformation rules Rules and Norms - Methodologies for modeling regulations using both ontologies and rules - Defeasibility: modeling rule exceptions and priority relations among rule - The relationship between rules and legal argumentation schemes - Rule language requirements for the isomorphic modeling of legislation - Rule based inference
[rules-users] Guvnor Building pkg error
When trying to build a package (even using the sample pkg from drools Guvnor) I got this - Sorry, a technical error occurred. Please contact a system administrator. This is indeed very frustrating as I need to build binary pkgs for my remote rule agents to access. I found the post here saying it is fixed. https://jira.jboss.org/jira/browse/GUVNOR-327 No details though. Can anyone shed some light on this problem if you know how to fix it? Thanks in advance for your reply. Yan ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Deploying Guvnor in an Enterprise environment
Hello Drools Users, I'm working on deploying Guvnor in an enterprise environment. There is some mention in the JBoss Wikis http://www.jboss.org/community/wiki/GuvnorRoadmapFor0809 and http://www.jboss.org/community/wiki/Guvnor about lifecycle management of assets in Guvnor. The descriptions in those two articles is somewhat brief and does not quite cover all of my requirements. We have a need to be able to deploy assets to various dev, staging and production servers and define which assets should be deployed in a given deploy. I realize that snapshots and selectors can be leveraged to get this kind of functionality, but it does not feel like a robust solution. Additionally, we have scenarios where two users might need to edit the same asset for two different releases, and test them on different environments simultaneously. Has anyone implemented Guvnor in a Dev, Staging, Production environment that could give some pointers on how to manage these concurrent release issues? Thanks, Steve Ronderos___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
