Re: [rules-users] Fetching values of an object's attribute set by different 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-values-of-an-object%27s-attribute-set-by-different-rules-tp18922201p18940166.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] Fetching values of an object's attribute set bydifferent 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-values-of-an-object%27s-attribute-set-by- different-rules-tp18922201p18940166.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/Fetching-values-of-an-object%27s-attribute-set-by-different-rules-tp18922201p18941569.html Sent from the drools - user mailing list archive at Nabble.com.
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:
Re: [rules-users] Composition of Fact Templates
In other words, in 5.0 you can do: declare Address line1 : String line2 : String end declare Person name : String age : int address : Address end There are additional notation and features you are able to use when working with type declarations, but the above is what you asked for. []s Edson 2008/8/11 Mark Proctor [EMAIL PROTECTED] FactTemplates are an experimental feature and only supports primitives and strings as fields. It was based around using arrays for the models, this made the implementation easy but tooling and integration with other libraries being very hard. For 5.0 we using type declarations which basically are generated pojos, which causes a nightmare for custom classloader stuff, but is much more tooling and 3rd party library integration friendly. These type declarations support primitives and classes for their fields. Mark Stephen Kestle wrote: I'm trying to make some fact templates in the form of template Address String line1 String line2 end template Person String name int age Address address end It complains that it is Unable to resolve class Address 1. Is there any way around this - am I just getting syntax wrong? 2. Is this being fixed in 5.0 or 4.0.7 (which I have) 3. Am I able to modify the class loader to grab the FactTemplate class types and infer the correct object? e.g. is this something that's ridiculously hard, and so hasn't already been included? 4. Am I going about this entirely the wrong way? 1. Are nested types at all useful in the rules? 2. Is it possible to even have a rule like: p: Person( age == 5, Address(line1 == My address)) ? (given a java object schema) 3. Should I be using variables and other rules to assert facts? 4. Off topic: Is rules composition achieved by the assertion of facts for other rules to use? What I want to do: I am dealing with (xml) schemas and ontologies, and need to be able to create Fact Templates from these definitions. While I can do this easily enough in java side, I believe I need to create the templates to match my java objects so that the rules can be compiled. Thanks heaps Stephen ___ 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] or not working
The either method is clever, and it works! Thank you so much, Edson.
On 8/8/08, Edson Tirelli [EMAIL PROTECTED] wrote:
You must escape ( ...
[condition][]\(=(
But I'm not sure it will work, because expansion is doing nothing... I
mean, text before and after expansion is the same and the system was
designed to check for changes...
Do you need to have ( alone in a line? Can't you use a more textual
representation for ( or? Like:
rule XYX
when
Either
Condition_1
Condition_2
End_Either
then
Action_1
end
So you can map Either to ( or and End_either or whatever word you chose
to )?
Just trying to find alternate ways.
Edson
2008/8/8 Yu Wang [EMAIL PROTECTED]
This doesn't work. :(
Acutally I am using the eclipse plugin and the DSL viewer shows that
the source code looks fine. The code I put in my first email was taken
from the DSL viewer.
but when I add the three lines:
[condition][](=(
[condition][])=)
[condition][]or=or
The DSL viewer refuses to work and shows the following msg:
DSL Rule Translation Error!
Reason:
java.util.regex.PatternSyntaxException: Unclosed group
near index 13
(\W|^)((\W|$)
I think it means ( in the last word.
I also tried (=(, and '(', didn't work either.
So I can't add the three mappings this way. Any ideas? Thanks!
On 8/8/08, Yu Wang [EMAIL PROTECTED] wrote:
Thanks for your reply. Yes, I am using a DSL. So what you mean is I
need to add 3 mappings in DSL like the following:
( mapped to (
) mapped to )
or mapped to or
right? I'll try that.
Thanks a lot!
On 8/8/08, Edson Tirelli [EMAIL PROTECTED] wrote:
The error message indicates you are using DSL and the problem is
not in
the DRL, but in DSL.
DSL requires every single line to be matches (or expanded), so if
you
have a line with a single ( and nothing more, either you have a
mapping for
it, or you escape the line with .
Best way to fix your problem is to use the drools eclipse plugin
for
.dslr files, and using the DRL preview feature.
[]s
Edson
2008/8/8 Yu Wang [EMAIL PROTECTED]
Hi, I need help in making the or work. I have the following rule:
rule
when
(
or
Condition_clause_1
Condition_clause_2
)
then
Consequence_clause_1
end
-
It gives me the following compilation error:
org.drools.rule.InvalidRulePackage: [4] Unable to
expand:
( [5]
Unable to expand: or[8] Unable to expand: )
Seems it doesn't recognize (, or, and ). But I totally follow
the documentation on section 6.5.2.3 of version 4.0.7.
Any help is highly appreciated.
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JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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Re: [rules-users] Fetching values of an object's attribute set bydifferent rules
StatelessSession.executeWithResults() was what I had in mind when I
suggested obtaining the newly asserted facts from the working memory
using a query. In my application, I assert a new fact accumulator when
appropriate from within the rules themselves, and then have a simple
query that looks like this:
query findAccumulator
result : Accumulator()
end
Then I use something like this to get my accumulator back:
StatelessSessionResult results = session.executeWithResults(new Object[] {...});
QueryResults queryResults = results.getQueryResults(findAccumulator);
Accumulator acc = (Accumulator) QueryResults.get(0).get(result);
Kris
On Tue, Aug 12, 2008 at 3:42 AM, Anstis, Michael (M.) [EMAIL PROTECTED] 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-values-of-an-object%27s-attribute-set-by-
different-rules-tp18922201p18940166.html
Sent from the drools - user mailing list archive at Nabble.com.
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[rules-users] Max packages
Can someone help me understand the relationship between the number of Packages in a single RuleBase and PermGen memory consumption? I have a test that generates 200 rules and then adds those rules as different packages to a single rule base. PermGen consumption grows near linearly with the addition of Packages to the rule base and on a default PermGen setting the JVM runs out of PermGen after about 120 packages. Is every new Package and RuleBase backed by a set of generated Classes? Is there a way to get around the amount of class generation that is taking place? The test has been run against Drools 5. Thank you for your help, Joe ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
