[JBoss JIRA] Created: (JBRULES-2052) DrlDumper does wrong dumps, when lhs contains complex conditions with And.
by Kateryna Rudenko (JIRA)
DrlDumper does wrong dumps, when lhs contains complex conditions with And.
----------------------------------------------------------------------------
Key: JBRULES-2052
URL: https://jira.jboss.org/jira/browse/JBRULES-2052
Project: JBoss Drools
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: drools-core
Affects Versions: 5.0.0.CR1
Reporter: Kateryna Rudenko
Assignee: Mark Proctor
DrlDumper does wrong dumps, when lhs contains complex conditions with And.
When there is ConditionalElementDescr in other ConditionalElementDescr, DrlDumper prints condition without round brackets. But should, because formed text can not be parsed with DrlParser into the same tree structure.
Example 1.
rule in file "Test1.drl":
rule "continued_rule"
no-loop true
when
($a : Action1() || $b : Action2())
&&
($c : Action3() || $d : Action4())
then
System.out.println("Fired.");
end
And method:
public void test1() throws DroolsParserException
{
DrlParser parser = new DrlParser();
final InputStream drl = getClass().getResourceAsStream(
"Test1.drl");
final PackageDescr packageDescr = parser.parse(drl);
if (parser.hasErrors())
{
Assert.fail(parser.getErrors().toString());
}
final String dump = new DrlDumper().dump(packageDescr);
System.out.println(dump);
}
Output is:
rule "continued_rule"
no-loop true
when
$a : Action1( ) || $b : Action2( ) && $c : Action3( ) || $d : Action4( )
then
System.out.println("Fired.");
end
According to operation priority in this case will be
$a : Action1( ) || ($b : Action2( ) && $c : Action3( )) || $d : Action4( )
and it is quite another operation.
DrlDumper should support brackets to save operation grouping.
Example 2.
Rule
rule "continued_rule2"
no-loop true
when
($a : Action1() && $b : Action2())
||
($c : Action3() && $d : Action4())
then
System.out.println("Fired.");
end
Out after performing test1() from Example 1:
rule "continued_rule"
no-loop true
when
$a : Action1( ) || $c : Action3( )
then
System.out.println("Fired.");
end
DrlDumper lost $b : Action2() and $d : Action4()! It happened because processOrDescrList in DrlDumper.
In string
if ( descrString.endsWith( DrlDumper.eol ) ) {
descrString = descrString.substring( 0,
descrString.indexOf( DrlDumper.eol ) );
}
we lose all subconditions except first line. It should be
if ( descrString.endsWith( DrlDumper.eol ) ) {
descrString = descrString.substring( 0,
descrString.LastIndexOf( DrlDumper.eol ) );
}.
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13 years, 3 months
[JBoss JIRA] Created: (JBRULES-2040) Drools, Jboss AS, Dynamic Bean Generation
by Shawn Ritchie (JIRA)
Drools, Jboss AS, Dynamic Bean Generation
------------------------------------------
Key: JBRULES-2040
URL: https://jira.jboss.org/jira/browse/JBRULES-2040
Project: JBoss Drools
Issue Type: Task
Security Level: Public (Everyone can see)
Components: All
Affects Versions: 4.0.7
Environment: Jboss Application Server v4.2
Drools 4.0.7
Javassist
JDK1.6
Reporter: Shawn Ritchie
Assignee: Mark Proctor
The issues is this guys i am creating a bean dynamically in this simple example i have an arraylist of strings which will create a private field, and a getXXX and a setXXX method for each of these fields
The problem arises when i try to load the .drl file in the package builder which gives me the follow error (SEE BELOW)
I suspect it has something to do with the class loader or the package structure in the rules?
Any suggestion reading material or help would be greatly usefull
the code i have loaded is a simple application which replicates the error
22:20:59,435 ERROR [STDERR] Unable to create Field Extractor for 'name' of '[ClassObjectType class=com.beancreation.personXYZ]' in rule 'Credit Allowed' : [Rule name=Credit Allowed, agendaGroup=MAIN, salience=0, no-loop=false]
22:20:59,435 ERROR [STDERR] Rule Compilation error : [Rule name=Credit Allowed, agendaGroup=MAIN, salience=0, no-loop=false]
com/beancreation/Rule_Credit_Allowed_0.java (1:0) : The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files
com/beancreation/Rule_Credit_Allowed_0.java (1:8) : The package com.beancreation collides with a type
com/beancreation/Rule_Credit_Allowed_0.java (2:34) : The import com.beancreation cannot be resolved
22:20:59,435 INFO [STDOUT] Could not parse knowledge.
22:20:59,435 ERROR [STDERR] java.lang.IllegalArgumentException: Could not parse knowledge.
22:20:59,435 ERROR [STDERR] at com.expertsystem.DroolsExecution.loadRules(DroolsExecution.java:49)
22:20:59,435 ERROR [STDERR] at com.create.TestCase.run(TestCase.java:52)
22:20:59,445 ERROR [STDERR] at org.apache.jsp.index_jsp._jspService(index_jsp.java:74)
22:20:59,445 ERROR [STDERR] at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
22:20:59,445 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
22:20:59,445 ERROR [STDERR] at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
22:20:59,445 ERROR [STDERR] at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
22:20:59,445 ERROR [STDERR] at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
22:20:59,445 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
22:20:59,445 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
22:20:59,445 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
22:20:59,445 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
22:20:59,445 ERROR [STDERR] at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
22:20:59,445 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
22:20:59,445 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
22:20:59,445 ERROR [STDERR] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
22:20:59,445 ERROR [STDERR] at java.lang.Thread.run(Thread.java:619)
22:20:59,445 ERROR [STDERR] java.lang.IllegalArgumentException: Could not parse knowledge.
22:20:59,445 ERROR [STDERR] at com.expertsystem.DroolsExecution.loadRules(DroolsExecution.java:49)
22:20:59,445 ERROR [STDERR] at com.create.TestCase.run(TestCase.java:52)
22:20:59,445 ERROR [STDERR] at org.apache.jsp.index_jsp._jspService(index_jsp.java:74)
22:20:59,445 ERROR [STDERR] at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
22:20:59,445 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
22:20:59,445 ERROR [STDERR] at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
22:20:59,445 ERROR [STDERR] at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
22:20:59,445 ERROR [STDERR] at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
22:20:59,445 ERROR [STDERR] at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
22:20:59,445 ERROR [STDERR] at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
22:20:59,445 ERROR [STDERR] at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
22:20:59,445 ERROR [STDERR] at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
22:20:59,445 ERROR [STDERR] at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
22:20:59,445 ERROR [STDERR] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
22:20:59,445 ERROR [STDERR] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
22:20:59,445 ERROR [STDERR] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
22:20:59,445 ERROR [STDERR] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
22:20:59,445 ERROR [STDERR] at java.lang.Thread.run(Thread.java:619)
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13 years, 3 months
[JBoss JIRA] Created: (JBRULES-1829) Nested From Tag Not Supported in Drools
by Nagarajan Shanmugam (JIRA)
Nested From Tag Not Supported in Drools
---------------------------------------
Key: JBRULES-1829
URL: https://jira.jboss.org/jira/browse/JBRULES-1829
Project: JBoss Drools
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: drools-compiler
Affects Versions: 5.0.0.M2
Environment: Windows XP, Eclipse 3.3.
Reporter: Nagarajan Shanmugam
Assignee: Mark Proctor
HI i have Created one rule file that have two From tag. Using XmlDumper I create Xml rule file. When i try to parse that Xml rule file its throwing Error. And also the parsed Xml files also Wrong.
Exception in thread "main" org.drools.compiler.DroolsParserException: org.xml.sax.SAXParseException: <from> may not be nested
at com.drools.service.ConvertDrlToXml.main(ConvertDrlToXml.java:47)
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13 years, 3 months
[JBoss JIRA] Created: (JBRULES-1009) Can't execute rules twice with a second classloader
by aaron dixon (JIRA)
Can't execute rules twice with a second classloader
---------------------------------------------------
Key: JBRULES-1009
URL: http://jira.jboss.com/jira/browse/JBRULES-1009
Project: JBoss Rules
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: Reteoo
Affects Versions: 4.0.0.MR3
Reporter: aaron dixon
Assigned To: Mark Proctor
Priority: Minor
Attachments: drools-test.zip
I am trying to sequentially perform two rules executions using two
different classloaders in the same VM. I create completely new state
for each execution, yet I still fail on the second execution (the first execution succeeds). I
believe this has to do with some internal static cached state that
JBossRules is maintaining. An integration test is attached as an archived Eclipse project (zip).
Exception thrown:
Exception in thread "main" java.lang.ClassCastException: test.drools.classloader.FooShadowProxy
at org.drools.base.test.drools.classloader.Foo$getName.getValue(Unknown Source)
at org.drools.base.ClassFieldExtractor.getValue(ClassFieldExtractor.java:94)
at org.drools.base.evaluators.StringFactory$StringEqualEvaluator.evaluate(StringFactory.java:85)
at org.drools.rule.LiteralRestriction.isAllowed(LiteralRestriction.java:61)
at org.drools.rule.LiteralConstraint.isAllowed(LiteralConstraint.java:82)
at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:121)
at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:159)
at org.drools.reteoo.Rete.assertObject(Rete.java:175)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:70)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:772)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:584)
at org.drools.reteoo.ReteooStatelessSession.execute(ReteooStatelessSession.java:63)
at test.drools.classloader.Driver.testRules(Driver.java:49)
at test.drools.classloader.Driver.go(Driver.java:35)
at test.drools.classloader.Driver.main(Driver.java:19)
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13 years, 3 months
[JBoss JIRA] (JBRULES-3379) org.antlr.runtime.CommonToken cannot be cast to org.drools.lang.DroolsToken
by sundaranarayanan rengasamy (JIRA)
sundaranarayanan rengasamy created JBRULES-3379:
---------------------------------------------------
Summary: org.antlr.runtime.CommonToken cannot be cast to org.drools.lang.DroolsToken
Key: JBRULES-3379
URL: https://issues.jboss.org/browse/JBRULES-3379
Project: Drools
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: drools-compiler (expert)
Affects Versions: 5.2.0.Final
Environment: eclipse
Reporter: sundaranarayanan rengasamy
Assignee: Mark Proctor
Fix For: FUTURE
I am using Decision table for the condition. I want to compare, two properties of two different class. when creating the object types for that classes in a cell I am facing the problem. I am using drools-compiler5.2.0 FINAL jar file.
The problem is:
Description Resource Path Location Type
Unexpected exception raised while parsing. This is a bug. Please contact the Development team :
java.lang.ClassCastException: org.antlr.runtime.CommonToken cannot be cast to org.drools.lang.DroolsToken
[org.drools.lang.ParserHelper.emit(ParserHelper.java:89), org.drools.lang.DRLParser.fact(DRLParser.java:9214), org.drools.lang.DRLParser.fact_binding(DRLParser.java:8872), org.drools.lang.DRLParser.lhs_pattern(DRLParser.java:8713), org.drools.lang.DRLParser.pattern_source(DRLParser.java:7017), org.drools.lang.DRLParser.lhs_unary(DRLParser.java:5846), org.drools.lang.DRLParser.lhs_and(DRLParser.java:5559), org.drools.lang.DRLParser.lhs_or(DRLParser.java:5249), org.drools.lang.DRLParser.lhs(DRLParser.java:5047), org.drools.lang.DRLParser.normal_lhs_block(DRLParser.java:4953), org.drools.lang.DRLParser.when_part(DRLParser.java:3217), org.drools.lang.DRLParser.rule(DRLParser.java:3009), org.drools.lang.DRLParser.statement(DRLParser.java:746), org.drools.lang.DRLParser.compilation_unit(DRLParser.java:340), org.drools.compiler.DrlParser.compile(DrlParser.java:231), org.drools.compiler.DrlParser.parse(DrlParser.java:71), org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(DroolsEclipsePlugin.java:416), org.drools.eclipse.DroolsEclipsePlugin.parseXLSResource(DroolsEclipsePlugin.java:310), org.drools.eclipse.builder.DroolsBuilder.parseXLSFile(DroolsBuilder.java:306), org.drools.eclipse.builder.DroolsBuilder.parseResource(DroolsBuilder.java:206), org.drools.eclipse.builder.DroolsBuilder$DroolsBuildVisitor.visit(DroolsBuilder.java:149), org.eclipse.core.internal.resources.Resource$2.visit(Resource.java:112), org.eclipse.core.internal.resources.Resource$1.visitElement(Resource.java:64), org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:82), org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86), org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86), org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86), org.eclipse.core.internal.watson.ElementTreeIterator.doIteration(ElementTreeIterator.java:86), org.eclipse.core.internal.watson.ElementTreeIterator.iterate(ElementTreeIterator.java:127), org.eclipse.core.internal.resources.Resource.accept(Resource.java:74), org.eclipse.core.internal.resources.Resource.accept(Resource.java:110), org.eclipse.core.internal.resources.Resource.accept(Resource.java:94), org.drools.eclipse.builder.DroolsBuilder.fullBuild(DroolsBuilder.java:133), org.drools.eclipse.builder.DroolsBuilder.build(DroolsBuilder.java:95), org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:629), org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42), org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:172), org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:203), org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:255), org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42), org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:258), org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:311), org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:343), org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:144), org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:242), org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)] POC.xls /drools poc/src/main/rules Unknown Drools Error
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13 years, 3 months
[JBoss JIRA] Created: (JBRULES-2031) Enhancements to spreadsheet based testing tool
by Michael Neale (JIRA)
Enhancements to spreadsheet based testing tool
----------------------------------------------
Key: JBRULES-2031
URL: https://jira.jboss.org/jira/browse/JBRULES-2031
Project: JBoss Drools
Issue Type: Feature Request
Security Level: Public (Everyone can see)
Components: drools-testing
Reporter: Michael Neale
Assignee: Michael Neale
Fix For: FUTURE
As mentioned by Ansgar in blog comments: http://blog.athico.com/2009/03/new-testing-tool.html
Hi,
we're using Drools to perform mortgage scoring. For testing, we developed a somewhat similar, but already more sophisticated testing framework. Currently, our test set comprises of roughly 800 test scenarios/test cases.
Similarities:
* also uses spreadsheet tables to define test cases.
* each column resembles a test case
* leftmost column used to name elements of input facts or define expected conditions (see below)
Differences:
* concept of "expected values" not expressed as mere values, but as drools conditions which are expected to hold after rules all under test finished execution. These conditions are automagically converted into a drools query which is run against the working memory after rule execution.
Enhancements:
* conditions support simple text replacement, like a macro preprocessor. Wildcards in drools condition can be replaced by test case-specific text
* allows skipping of certain condition checks on a per-test-case basis
* event logging of the drools working memory embedded into fit output file for failed checks. visibility of log can be toggled using html-embedded javascript. allows for simple copy/paste into "audit view" window in eclipse. This eases debugging rules a lot!
* possibility to define a subset of rules contained in a *.drl file to be tested
Open issues:
* Syntax of initial facts specification is probably a bit cumbersome. We're using a self-brewed language to do this. Already thought of replacing this by MVEL, but not done yet. For us, the current solution works ok.
* Up to now, requires explicit import of all used Java classes. This is rather a limitation of drools - we did not manage to get package imports in *.drl files to work. Could probably be solved.
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13 years, 3 months
[JBoss JIRA] (JBRULES-3310) drools-camel osgi bundle
by surya aditya (Created) (JIRA)
drools-camel osgi bundle
------------------------
Key: JBRULES-3310
URL: https://issues.jboss.org/browse/JBRULES-3310
Project: Drools
Issue Type: Feature Request
Security Level: Public (Everyone can see)
Components: drools-camel
Affects Versions: 5.3.0.Final
Environment: window, linux
Reporter: surya aditya
Assignee: Mark Proctor
Priority: Minor
Fix For: 5.3.1.Final
drools-camel is not osgi compatible i.e not an osgi bundle yet. can this be enhanced in next releases to be osgi ready? many of the apache camel components fits very well in osgi environment and drools-camel is missing this functionality. it would help if upgraded to osgi bundle like drools-core etc.
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13 years, 3 months
[JBoss JIRA] (JBRULES-3388) KnowledgeAgent custom classloader not working for PKG resources
by Herman Post (JIRA)
Herman Post created JBRULES-3388:
------------------------------------
Summary: KnowledgeAgent custom classloader not working for PKG resources
Key: JBRULES-3388
URL: https://issues.jboss.org/browse/JBRULES-3388
Project: Drools
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: drools-core
Affects Versions: 5.3.1.Final
Environment: Windows 7, Java7-5, JBoss AS7.1
Reporter: Herman Post
Assignee: Mark Proctor
I believe there may be a bug when trying to use a custom class loader with the KnowledgeAgent and the KnowledgeBuilderConfiguration, and when the ChangeSet is a PKG resource.
I have been trying to get the knowledge-agent-classloader sample from the new Drools Cookbook to work with a PKG resource. The sample works fine for a DRL resource, but when I convert it to use my fact jar, and a PKG resource containing my rules, which I downloaded from Guvnor, it throws a ClassNotFoundException for my fact model. If I put my fact model in the classpath, the error goes away and my rules can be added to the KnowledgeAgent and run correctly. Following is the code from the sample that I have converted, and I have attached a zip file with a complete project demonstrating the problem. Also, I can get my rules and fact model to work if I use a DRL ChangeSet.knowledge-agent-classloader.zip
URL modelJarURL = getClass().getResource("Patient-1.0.jar");
URLClassLoader customURLClassloader = new URLClassLoader(new URL[] {modelJarURL });
KnowledgeBuilderConfiguration kbuilderConfig = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(null,
customURLClassloader);
KnowledgeBaseConfiguration kbaseConfig = KnowledgeBaseFactory.newKnowledgeBaseConfiguration(null, customURLClassloader);
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbaseConfig);
KnowledgeAgentConfiguration aconf = KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("test", kbase, aconf, kbuilderConfig);
// kagent.applyChangeSet(new ClassPathResource("change-set.xml", getClass())); // this goes with model.jar
// kagent.applyChangeSet(new ClassPathResource("drl-change-set.xml", getClass())); // this goes with Patient.jar
kagent.applyChangeSet(new ClassPathResource("pkg-change-set.xml", getClass())); // this goes with Patient.jar
return kagent.getKnowledgeBase();
Following is the stack trace from the error:
java.lang.NullPointerException
at org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:148)
at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1016)
at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:785)
at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:657)
at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:190)
at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:169)
at drools.cookbook.chapter02.KnowledgeAgentClassloaderTest.createKnowledgeBase(KnowledgeAgentClassloaderTest.java:59)
at drools.cookbook.chapter02.KnowledgeAgentClassloaderTest.customClassloaderTest(KnowledgeAgentClassloaderTest.java:30)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59)
at org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:98)
at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79)
at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:87)
at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42)
at org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4ClassRunner.java:88)
at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)
at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37)
at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
I have been having the exact same problem when trying to use a custom class loader with just a KnowldegeBuilder and no KnowledgeAgent.
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13 years, 3 months