How to retrieve the Rule names in the drools rule file
by Amila Silva
hi everyone,
I have requirement like to retrieve the RULE names in a given rule files.
and also is there a way to map a rule names from a multiple rule files.
i want to load the or show the available rules and system user to select
the required rule for his program.
let me know the possible way of doing this.
--
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
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17 years, 1 month
How to import drl files to Guvnor
by kavuri
Hi,
I am new to guvnor web based application.we have lot of rule files(DRL)
developed in our project.until now we are just manually writing the code in
the drl files.as we have lots of rules it becomes hard to maintain.so we
trying to shift those drl files into guvnor for effctive management of
rules.
i got guvnor war file and deployed in the tomcat 6.0.it is working fine
.now i need to inport all my drl files into that system.i want to sink
guvnor with my project.
anyone please help me out ....
Thanks in advance....
regards,
Vamsi Krishna.Kavuri.
17 years, 1 month
MVEL 2.0 bug in 'with' block
by Dan Seaver
I think there may be a bug in MVEL 2.0. If I do the following, I get a
runtime exception:
with (actionCodeSecurity = new ActionCodeSecurity()) {
securityCategory = securityCategory,
actionCode = "AA",
visitTypeConstraint = 1,
visitTypeList = "IP, OP"
}
However, if I remove the comma between IP and OP it works:
visitTypeList = "IP OP"
Also, it works fine if I do all my assignments without the 'with' clause:
actionCodeSecurity = new ActionCodeSecurity()
actionCodeSecurity.securityCategory = securityCategory
actionCodeSecurity.actionCode = "AA"
actionCodeSecurity.visitTypeConstraint = 1
actionCodeSecurity.visitTypeList = "IP, OP"
I'm using the version of MVEL that shipped with Drools 5.0 Final build,
Eclipse Workbench, May 19, 2009.
--
View this message in context: http://www.nabble.com/MVEL-2.0-bug-in-%27with%27-block-tp24261697p2426169...
Sent from the drools - user mailing list archive at Nabble.com.
17 years, 1 month
Drolls 4.0.7 exception org.drools.RuntimeDroolsException: org.drools.base.mvel.MVELEvalExpression@1cf7491 while using matches operator
by Kumar, Ravendra
Hi All,
I am using Drools 4.0.7 and when I tried to use "matches" operator it is giving following exception
The rule logic is following
package com.logica.heca.lpr.rule;
import com.logica.heca.lpr.domain.*;
import com.logica.heca.lpr.domain.contact.*;
import com.logica.heca.lpr.domain.ruleengine.*;
import java.util.*;
rule "CPR_RULE_222222"
dialect "mvel"
when
INDUD : ContactVO();
eval(INDUD.districtCode matches "((UX)[ACMR][[A-Z0-9]]{3})|([A-Z0-9]++)")
then
System.out.println("hello");
End
Note: INDUD.districtCode returns String value.
While if I changed matches operator to java method this work fine
eval(INDUD.getDistrictCode().matches("((UX)[ACMR][[A-Z0-9]]{3})|([A-Z0-9]++)"));
any of your esteemed help will highly be appreciated
Thanks
Ravendra Kumar
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
org.drools.RuntimeDroolsException: org.drools.base.mvel.MVELEvalExpression@1cf7491 : java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Boolean
at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:82)
at org.drools.reteoo.EvalConditionNode.assertTuple(EvalConditionNode.java:148)
at org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:116)
at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:162)
at org.drools.reteoo.Rete.assertObject(Rete.java:175)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)
at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:911)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:883)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:684)
at org.drools.reteoo.ReteooStatelessSession.execute(ReteooStatelessSession.java:143)
at com.logica.heca.lpr.rule.RuleTester.main(RuleTester.java:44)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)
Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Boolean
at org.drools.base.mvel.MVELEvalExpression.evaluate(MVELEvalExpression.java:42)
at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:77)
... 18 more
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Thanks and Regards,
Ravendra kumar
IT Consultant
__________________________________
Logica - Releasing your potential
Margrethepladsen 4, 8000 Århus C
Danmark
T: +45 2518 8864
E-mail: ravendra.kumar(a)logica.com <mailto:hans.knudsen@logica.com>
www.logica.dk <http://www.logica.dk/>
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17 years, 1 month
drools expert jmx manageable, jboss mbean support
by work_registries＠web.de
Hi!
Drools / JBoss Rules v5.0.1.FINAL being a project of jboss.org I would like to know if there is any support to manage Drools Expert related objects (jsr94 and native) like jsr94 rule manager, rule sessions, Drools native Knowledge/Rule base, packages etc. via MBeans? Or the ability to register these instances via *-service.xml deployment method in JBoss AS?
Thanks, Jürgen
______________________________________________________
GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT!
Jetzt freischalten unter http://movieflat.web.de
17 years, 1 month
firing explicit rules or agend-groups
by Chris Richmond
Hello,
I thought I had encountered a sample of performing a:
session.fireAllRules();
except on explicit rules or at least on a specific agenda group.but I cannot
seem to locate that in the API for sessions..did I miss something or did I
imagine something before?
Thanks,
Chris
17 years, 1 month
RuleML-2009 REMINDER - Paper Deadline June 28th
by Adrian Paschke
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 - June 28th **
** ------------------ **
* Deadline, June 28th for full, short and Challenge demo papers **
* Keynotes and special talks by **
* Sandro Hawke about W3C RIF, **
* Donald Chapin about OMG SBVR **
* Paul Vincent about CEP **
* Jans Aßmann (FranzInc. CEO) **
* RuleML in the top 100 venues for impact factor in CiteSeerX **
* Forthcoming RuleML special journal issue **
* Proceedings published in Springer LNCS **
* Tutorials about W3C RIF, Drools (Mark Proctor), **
* tutorial Business Process Compliance **
* 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 **
* 20% RuleML-2009 Partner discounts - see registration page **
**********************************************************************
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.
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, and is now in the top 100 venues for impact factor (71):
http://citeseerx.ist.psu.edu/stats/venues.
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
(sponsoring opportunities: http://www.defeasible.org/ruleml2009/sponsors)
===================================================================
17 years, 1 month
function & mvel & declare - possible bug
by Michal Bali
Hi,
I've encountered a bizarre bug when a function is used together with a
declared type and a rule with mvel dialect.
To reproduce create a default 'New Drools Project' in Eclipse and replace
Sample.drl with the following:
--------------------------------------------------------------------------
package com.sample
function void aaa() { // <----- comment this and it will work
}
declare SomeBean
prop : int
end
rule "setup"
dialect "mvel" // <----- comment this and it will work
when
eval(true)
then
SomeBean someBean = new SomeBean();
insert(someBean);
System.out.println( "setup inserted:" + someBean);
end
rule "should never fire"
salience -20
when
not SomeBean()
then
System.out.println( "rule that should never fire fired !!!" );
end
------------------------------------------------------------------------
Run the DroolsTest.java and see that the last rule that should never fire is
actually fired. If you comment out the 'aaa' function or change the dialect
to 'java' all works fine.
Note that it breaks on JDK 1.5.0_12 however it works fine on JDK 1.6.0_14.
Tested on WinXP.
Is it just my machine or does anybody else see this issue?
Best regards,
Michal
17 years, 1 month
Help debugging NPE
by Dirk Bergstrom
I'm running into an NPE using Drools 4.0.7, and I'm stumped by it (stacktrace
below). I made some changes to seemingly unrelated code, and this error started
showing up. It would help me to understand what's going on if someone could
tell me roughly what's going on here. Since the error is thrown by generated
code (in what I assume is a shadow proxy), I can't tell what the offending null
pointer is. I'm not even entirely sure what's triggering the bug (it happens
half an hour into the run of big multi-threaded application with about 40K
objects in the working memory).
Is this happening because:
*) getRli_nums() in one of my PRRecord objects is returning a null value?
*) There is a null PRRecord object backing the shadow proxy?
*) Some other thing is null?
*) I'm running into a bug in Drools?
I stuck in this rule:
when
$pr : PRRecord( rli_nums == null )
then
System.out.println($pr.getId());
end
And it didn't print anything, so I'm inclined to think that this is not a simple
matter of something returning a null value...
I'll be most appreciative of any help I can get.
Here's the stacktrace:
java.lang.NullPointerException
at
org.drools.base.net.juniper.dash.data.PRRecord13409648$getRli_nums.getValue(Unknown
Source)
at
org.drools.base.ClassFieldExtractor.getValue(ClassFieldExtractor.java:127)
at
org.drools.base.evaluators.BaseMemberOfEvaluator.evaluateCachedRight(BaseMemberOfEvaluator.java:45)
at
org.drools.rule.VariableRestriction.isAllowedCachedRight(VariableRestriction.java:89)
at
org.drools.rule.VariableConstraint.isAllowedCachedRight(VariableConstraint.java:81)
at
org.drools.common.DoubleBetaConstraints.isAllowedCachedRight(DoubleBetaConstraints.java:164)
at org.drools.reteoo.JoinNode.retractObject(JoinNode.java:189)
at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateRetractObject(CompositeObjectSinkAdapter.java:375)
at org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:189)
at org.drools.reteoo.Rete.retractObject(Rete.java:215)
at org.drools.reteoo.ReteooRuleBase.retractObject(ReteooRuleBase.java:211)
at
org.drools.reteoo.ReteooWorkingMemory.doRetract(ReteooWorkingMemory.java:79)
at
org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1250)
at
org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1203)
at
net.juniper.dash.data.DataSource.reconcileAssertedRecords(DataSource.java:409)
--
Dirk Bergstrom dirk(a)juniper.net
_____________________________________________
Juniper Networks Inc., Computer Geek
Tel: 408.745.3182 Fax: 408.745.8905
17 years, 1 month
Firiing explicit rules
by Chris Richmond
Hello,
For performance reasons, assuming I am using STREAM mode, is it better to :
A. create several streams in my rule file and inject objects into
various streams depending on my needs
or
B. create a different session for each stream that I might have had in
A. above?
And if I do use option A, is my understanding correct that each stream will
be processed on it's own thread?
And if so, I notice that I am able to update a common statistical object
that I created within my rule file and update it from consequences on
different streams. If each stream is processed on it's own thread, is
updating of this in rule defined statistics object synchronized/thread safe?
For example in my rule file I have the following "stats" object:
# stats object
declare ObjectStats
id : String @key
name: String
lastReadingA : int
lastReadingB : int
end
..then I have the following two rules..
rule "update stats from objects A"
lock-on-active
when
$stats : ObjectStats( $id : id)
$a : ObjectTypeA(parentId == $id, $aValue : value) from entry-point
"stream for objects of type a"
then
modify($stats) { lastReadingA = $aValue };
end
rule "update stats from objects B"
lock-on-active
when
$stats : ObjectStats( $id : id)
$b : ObjectTypeB(parentId == $id, $bValue : value) from entry-point
"stream for objects of type b"
then
modify($stats) { lastReadingB= $bValue };
end
This is working fine and the lock-on-active seems to be preventing me from
getting the "cross product" problem, but is each of these streams processed
independantly on their own thread?
Thanks,
Chris
17 years, 1 month
