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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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
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firing explicit rules or agend-groups
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I thought I had encountered a sample of performing a:
session.fireAllRules();
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imagine something before?
Thanks,
Chris
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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
----------------------------
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* 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.
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NICTA (National ICT Australia) Ltd
Corporate Semantic Web
Logic Programming Associated Ltd
ruleCore
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Modelsystems Ltd
(sponsoring opportunities: http://www.defeasible.org/ruleml2009/sponsors)
===================================================================
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function & mvel & declare - possible bug
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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
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Help debugging NPE
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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
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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
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Hello all,
I have been using Guvnor to manage some rules in a prototype system
that we are developing. If I login to Guvnor, make some changes, and
rebuild the package, sometimes I will get the following error:
java.lang.NoClassDefFoundError: tpn/CompareBetween
I have a function defined that is "compareBetween" and the syntax and
everything looks correct in the generated DRL file. Sometimes, I can
rebuild the package (without making any changes) and the problem will
go away?
Has anyone seen anything like this before?
Thanks,
Andrew
--
Andrew Nguyen
Nguyen & Associates
Custom Software Development & IT Services
http://www.na-consulting.net
andrew(a)na-consulting.net
858-225-7575
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Hi!
I am working with drools (flow) 5.1.snapshot. I have a timer node within my
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I tried to pass the delay-value as parameter to the process, and then set
the new timer delay, but this approach didn't have any effect,
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Assigning a variable name as delay (eclipse-GUI-property) doesn't work
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tom !
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Another question on how to use map
by Brody bach
Hi,
I need to put a map into the working memory and make some check on the
values
I have an object called Student with Id
And for every student there is a list of activity.
Each activity has date and the time for the activity
What I will be putting in the working memory looks as follows:
List<Student> studentList = getStudentList();
Map<Student, List<Activity>> studentActivityMap =
getStudentActivities(studentList);
List objects = new ArrayList();
objects.add(studentList);
objects.add(studentActivityMap);
ksession.execute(objects);
====================
Now i need to check for every student, if there is/are activity(ies) which
needs more than 2 hours. If yes, give an output information which mention,
which student and on which day the activity is longer than 2 hours
when
$studentList : List
$std : Student($id : id) from $studentList
$activityList : ****how to get the list of activity for the student with
this $id from the given map *****
$act : Activity ($date : date, length > 180) from $activityList
then
(print something out using $id from std and $date from act)
Would really appreciate any help and hints here
Regards
bb
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16 years, 6 months
