Drools Flow : Persistence :- Getting Null Pointer Exception in JPAWorkItemManager.java
by Pardeep.Ruhil＠lntinfotech.com
Hi,
When I try to run a sample test case using drools-persistence.jar it works
successfully.
But when I try to include the persistence in my OFBiz application, I am
getting null pointer exception in class JPAWorkItemManager.java.
java.lang.NullPointerException
at
org.drools.persistence.processinstance.JPAWorkItemManager.completeWorkItem(
JPAWorkItemManager.java:85).
Null Pointer is because of getting EntityManager object as NULL. In the
below line of JPAWorkItemManager.java
EntityManager em = (EntityManager) this.workingMemory
.getEnvironment().get( EnvironmentName.ENTITY_MANAGER );
the em is null.
Because of this I am getting Null Pointer exception when it try to run the
code
if (workItemInfo == null) {
workItemInfo = em.find(WorkItemInfo.class, id);
}
Can you tell me why I getting NPE when I try to run the jar file in my
application.
While the code run successfully when I try to run sample test case for
that.
Please help me to get through the situation.
Thanks & Regards
Pardeep Ruhil
L&T Infotech Ltd
Mumbai
Ph: +919820283884
Larsen & Toubro Infotech Ltd.
www.Lntinfotech.com
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16 years, 8 months
Mvel and multithreading
by Grigoriev, Grigoriy
Hello,
I have a project, that uses Drools 5.0.1. I have a class, called RuleFlowProcessor, that's used to apply some of my rules to the objects.
The instances of RuleFlowProcessor with the identical configuration should be used by different threads, and i use following mechanism:
I initialize one instance of RuleFlowProcessor, and the threads take copy of this instance, calling the 'clone()' method, which is not synchronized, and in which I just create new instance of
RuleFlowProcessor and init it, using the same data.
And therefore I get an exception:
Exception in thread "Thread-91" [Error: incomplete statement: (possible use of reserved keyword as identifier: )]
[Near : {... globals != empt ....}]
^
[Line: 0, Column: 0]
at org.mvel2.MVELInterpretedRuntime.parseAndExecuteInterpreted(MVELInterpretedRuntime.java:153)
at org.mvel2.MVELInterpretedRuntime.parse(MVELInterpretedRuntime.java:44)
at org.mvel2.MVEL.eval(MVEL.java:514)
although, all the resources (.drl and .rf files) are parsed perfectly, when I use just one thread.
In actions of my ruleflow, the dialect: 'mvel' was set by default, if I set dialect to 'java' without modifying any code, the error doesn't occur.
The full stacktrace is in attach. I can send the project, that reproduces the problem, if needed.
Best regards,
Grigoriy Grigoriev.
16 years, 8 months
Re: [rules-users] Fwd: Build package 'default' Guvnor
by Eugenio Abello
Dear satjo, if you try it but I had no success. This step carry out:
1) Create the files users.properties, roles.properties in \drools-5.1.0.M1-
guvnor-standalone\jboss-4.2.3.GA <http://jboss-4.2.3.ga/>\server\default\conf.
also create the file 'testDS1-ds.xml' in \default\deploy
2) Create 'default' package in Guvnor, http://localhost:8080/drools-guvnor
,
user=krisv , pass= mypassword. OK
3) From eclipse add hellow_world.rf to Guvnor to 'default' package, OK
4) Build package 'default' , THE FOLLOWING delivery errors:
2009-10-28 11:18:43,859 INFO [STDOUT] DEBUG 28-10 11:18:43,859
(ServiceImplementation.java:loadRuleAsset:495) Package: default, asset:
hellow_world. Load time taken for asset: 906
2009-10-28 11:19:04,843 INFO [STDOUT] ERROR 28-10 11:19:04,843
(RepositoryServiceServlet.java:doUnexpectedFailure:76)
java.lang.NullPointerException
2009-10-28 11:19:04,843 ERROR [STDERR]
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public
abstract org.drools.guvnor.client.rpc.BuilderResult[]
org.drools.guvnor.client.rpc.RepositoryService.buildPackage(java.lang.String,java.lang.String,boolean)
throws com.google.gwt.user.client.rpc.SerializableException' threw an
unexpected exception: java.lang.NullPointerException
2009-10-28 11:19:04,843 ERROR [STDERR] at
com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:360)
2009-10-28 11:19:04,843 ERROR [STDERR] at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:546)
2009-10-28 11:19:04,843 ERROR [STDERR] at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)
2009-10-28 11:19:04,843 ERROR [STDERR] at
com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
2009-10-28 11:19:04,843 ERROR [STDERR] at
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
2009-10-28 11:19:04,843 ERROR [STDERR] at
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.web.ContextFilter$1.process(ContextFilter.java:42)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.servlet.ContextualHttpServletRequest.run(ContextualHttpServletRequest.java:53)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.web.ContextFilter.doFilter(ContextFilter.java:37)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
2009-10-28 11:19:04,843 ERROR [STDERR] at
java.lang.Thread.run(Thread.java:619)
2009-10-28 11:19:04,843 ERROR [STDERR] Caused by:
java.lang.NullPointerException
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.drools.compiler.ProcessBuilder.buildProcess(ProcessBuilder.java:118)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.drools.compiler.ProcessBuilder.addProcessFromFile(ProcessBuilder.java:222)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:468)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.drools.compiler.PackageBuilder.addRuleFlow(PackageBuilder.java:440)
2009-10-28 11:19:04,843 ERROR [STDERR] at org.drools.guvnor
.server.contenthandler.RuleFlowHandler.compile(RuleFlowHandler.java:167)
2009-10-28 11:19:04,843 ERROR [STDERR] at org.drools.guvnor
.server.builder.ContentPackageAssembler.buildAsset(ContentPackageAssembler.java:197)
2009-10-28 11:19:04,843 ERROR [STDERR] at org.drools.guvnor
.server.builder.ContentPackageAssembler.buildPackage(ContentPackageAssembler.java:184)
2009-10-28 11:19:04,843 ERROR [STDERR] at org.drools.guvnor
.server.builder.ContentPackageAssembler.<init>(ContentPackageAssembler.java:104)
2009-10-28 11:19:04,843 ERROR [STDERR] at org.drools.guvnor
.server.builder.ContentPackageAssembler.<init>(ContentPackageAssembler.java:117)
2009-10-28 11:19:04,843 ERROR [STDERR] at org.drools.guvnor
.server.ServiceImplementation.buildPackage(ServiceImplementation.java:1434)
2009-10-28 11:19:04,843 ERROR [STDERR] at org.drools.guvnor
.server.ServiceImplementation.buildPackage(ServiceImplementation.java:1415)
2009-10-28 11:19:04,843 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2009-10-28 11:19:04,843 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
2009-10-28 11:19:04,843 ERROR [STDERR] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
2009-10-28 11:19:04,843 ERROR [STDERR] at
java.lang.reflect.Method.invoke(Method.java:597)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
2009-10-28 11:19:04,843 ERROR [STDERR] at
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
2009-10-28 11:19:04,859 ERROR [STDERR] at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
2009-10-28 11:19:04,859 ERROR [STDERR] at
org.jboss.seam.security.SecurityInterceptor.aroundInvoke(SecurityInterceptor.java:157)
2009-10-28 11:19:04,859 ERROR [STDERR] at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
2009-10-28 11:19:04,859 ERROR [STDERR] at
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
2009-10-28 11:19:04,859 ERROR [STDERR] at
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:166)
2009-10-28 11:19:04,859 ERROR [STDERR] at
org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:102)
2009-10-28 11:19:04,859 ERROR [STDERR] at org.drools.guvnor
.server.ServiceImplementation_$$_javassist_7.buildPackage(ServiceImplementation_$$_javassist_7.java)
2009-10-28 11:19:04,859 ERROR [STDERR] at org.drools.guvnor
.server.RepositoryServiceServlet.buildPackage(RepositoryServiceServlet.java:206)
2009-10-28 11:19:04,859 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2009-10-28 11:19:04,859 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
2009-10-28 11:19:04,859 ERROR [STDERR] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
2009-10-28 11:19:04,859 ERROR [STDERR] at
java.lang.reflect.Method.invoke(Method.java:597)
2009-10-28 11:19:04,859 ERROR [STDERR] at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527)
2009-10-28 11:19:04,859 ERROR [STDERR] ... 27 more
Thanks
> You need to create a new 'default' package (i.e, not the 'defauktPackage'
> that comes with Guvnor) and upload your ruleflow.
>
>
>
> Eugenio Abello wrote:
> >
> > Dear, I made new tests, and also fails to 'defaultPackage'. This made:
> >
> > 1) Create the files users.properties, roles.properties in
> > \drools-5.1.0.M1-
> > guvnor-standalone\jboss-4.2.3.GA
> > <http://jboss-4.2.3.ga/>\server\default\conf.
> >
> > also create the file 'testDS1-ds.xml' in \default\deploy
> >
> > 2) Start the jboss.
> >
> > 3) http://localhost:8080/
> > <http://localhost:8080/drools-guvnor>drools<
> http://localhost:8080/drools-guvnor>
> > -
> > <http://localhost:8080/drools-guvnor><
> http://localhost:8080/drools-guvnor>
> > guvnor <http://localhost:8080/drools-guvnor>. when he asks "This looks
> > like
> > a brand new repository. Would you like to install a sample repository?"
> I
> > respond "No thanks"
> >
> > 4) From eclipse add hellow_world.rf to Guvnor to 'defaultPackage'
> package,
> > OK
> >
> > 5) Build package 'default' , and delivers the same error:
> >
> >
> > 2009-11-03 12:22:47,765 DEBUG [com.arjuna.ats.jta.logging.loggerI18N]
> > [com.arjuna.ats.internal.jta.recovery.info.secondpass] Local
> > XARecoveryModule - second pass
> > 2009-11-03 12:24:05,031 INFO [STDOUT] ERROR 03-11 12:24:05,031
> > (RepositoryServiceServlet.java:doUnexpectedFailure:76)
> > java.lang.NullPointerException
> > 2009-11-03 12:24:05,031 ERROR [STDERR]
> > com.google.gwt.user.server.rpc.UnexpectedException: Service method
> 'public
> > abstract org.drools.guvnor.client.rpc.BuilderResult[]
> >
> org.drools.guvnor.client.rpc.RepositoryService.buildPackage(java.lang.String,java.lang.String,boolean)
> > throws com.google.gwt.user.client.rpc.SerializableException' threw an
> > unexpected exception: java.lang.NullPointerException
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:360)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:546)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > org.jboss.seam.web.ContextFilter$1.process(ContextFilter.java:42)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.servlet.ContextualHttpServletRequest.run(ContextualHttpServletRequest.java:53)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > org.jboss.seam.web.ContextFilter.doFilter(ContextFilter.java:37)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > java.lang.Thread.run(Thread.java:619)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] Caused by:
> > java.lang.NullPointerException
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > org.drools.compiler.ProcessBuilder.buildProcess(ProcessBuilder.java:118)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.compiler.ProcessBuilder.addProcessFromFile(ProcessBuilder.java:222)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:468)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > org.drools.compiler.PackageBuilder.addRuleFlow(PackageBuilder.java:440)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.guvnor.server.contenthandler.RuleFlowHandler.compile(RuleFlowHandler.java:167)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.guvnor.server.builder.ContentPackageAssembler.buildAsset(ContentPackageAssembler.java:197)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.guvnor.server.builder.ContentPackageAssembler.buildPackage(ContentPackageAssembler.java:184)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.guvnor.server.builder.ContentPackageAssembler.<init>(ContentPackageAssembler.java:104)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.guvnor.server.builder.ContentPackageAssembler.<init>(ContentPackageAssembler.java:117)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.guvnor.server.ServiceImplementation.buildPackage(ServiceImplementation.java:1434)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.guvnor.server.ServiceImplementation.buildPackage(ServiceImplementation.java:1415)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > java.lang.reflect.Method.invoke(Method.java:597)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:28)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:77)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.security.SecurityInterceptor.aroundInvoke(SecurityInterceptor.java:157)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:166)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:102)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.guvnor.server.ServiceImplementation_$$_javassist_3.buildPackage(ServiceImplementation_$$_javassist_3.java)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> org.drools.guvnor.server.RepositoryServiceServlet.buildPackage(RepositoryServiceServlet.java:206)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> >
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > java.lang.reflect.Method.invoke(Method.java:597)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] at
> > com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527)
> > 2009-11-03 12:24:05,031 ERROR [STDERR] ... 27 more
> > 2009-11-03 12:24:47,765 DEBUG [com.arjuna.ats.arjuna.logging.arjLogger]
> > Periodic recovery - first pass <mar, 3 nov 2009 12:24:47>
> >
> > Thn
> > Kris
> >
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
> --
> View this message in context:
> http://old.nabble.com/Fwd%3A-Build-package-%27default%27-Guvnor-tp2618193...
> Sent from the drools - user mailing list archive at Nabble.com.
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 7 Nov 2009 20:19:22 -0800
> From: Wishing Carebear <wishing.carebear(a)gmail.com>
> Subject: [rules-users] some pointers for solution
> To: rules-users(a)lists.jboss.org
> Message-ID:
> <27407ce90911072019s6f348333je82e4908b108dd21(a)mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello:
> There are n selection criteria from s1 .. sn for each item i1.. in. Each
> item can have a subset of criteria which applies to them.
>
> The end user, can choose a subset of criteria like c1 and c5 and only the
> item that has c1 and c5 valid should be returned. For example: if item i1
> and i2 have criterias valid for c1, c2, c5, c6, c8 since the request is
> only
> for criteria c1 and c5, i1 and i2 must be returned.
>
> Is it possible to write a rule using drools for this requirement.
>
> Thanks for your help and time,
> cabear
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> http://lists.jboss.org/pipermail/rules-users/attachments/20091107/4e5daaf...
>
> ------------------------------
>
> Message: 4
> Date: Sun, 8 Nov 2009 01:08:22 -0800 (PST)
> From: Greg Barton <greg_barton(a)yahoo.com>
> Subject: Re: [rules-users] some pointers for solution
> To: Rules Users List <rules-users(a)lists.jboss.org>
> Message-ID: <252810.954.qm(a)web81508.mail.mud.yahoo.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> There are a couple of ways to do this. I'm sure there's a bit more clean
> way than the example I'm providing, but this should get you in the right
> direction. It's not 100% rules, because it involves a bit of java
> collections trickery. (See attached project,
> collection_DroolsCriteriaMatch.tar.gz)
>
> The heart of it is a single rule:
>
> rule "Match"
> when
> d : Data()
> q : Query( size <= d.size )
> Number( intValue == q.size )
> from accumulate(
> Criteria( this memberOf d, this memberOf q ),
> init( int total = 0; ),
> action( total ++; ),
> reverse( total --; ),
> result( total )
> )
> then
> System.out.println("Match: " + d + " and " + q) ;
> end
>
> The Data object holds data to be queried, Query objects are asserted to
> match the Data, and Criteria objects can be contained in either. (With the
> aforementioned collections trickery that if a Criteria is contained in a
> Query it can be found in a Data object, but the reverse isn't true. See the
> Query.contains(Object) method for how that's implemented.)
>
> So the rule above basically says "There's a Data object, and all of the
> Query objects Criteria are contained in the Data object."
>
> There's an alternate way of doing this using eval and a bit more java fu.
> See the eval_DroolsCriteriaMatch.tar.gz project attached. This one's
> probably not optimal, though, as it's basically a brute force check of all
> Data objects against the asserted Query.
>
> I tried for a while to get a solution working with different criteria types
> from both Data and Query objects being asserted into working memory, but I
> couldn't get the accumulate syntax right. Anyone know of a way to do that?
> (I figure that would get a "pure rules" solution.)
>
> --- On Sat, 11/7/09, Wishing Carebear <wishing.carebear(a)gmail.com> wrote:
>
> > From: Wishing Carebear <wishing.carebear(a)gmail.com>
> > Subject: [rules-users] some pointers for solution
> > To: rules-users(a)lists.jboss.org
> > Date: Saturday, November 7, 2009, 10:19 PM
> > Hello:
> > There are n selection criteria from s1 .. sn for each
> > item i1.. in. Each item can have a subset of criteria which
> > applies to them.
> > ?
> > The end user, can choose a subset of criteria like c1
> > and c5 and only the item that has c1 and c5 valid should be
> > returned. For example: if item i1 and i2 have criterias
> > valid for c1, c2, c5, c6, c8 since the request is only for
> > criteria c1 and c5, i1 and i2 must be returned.
> >
> > ?
> > Is it possible to write a rule using drools for this
> > requirement.
> > ?
> > Thanks for your help and time,
> > cabear
> >
> > -----Inline Attachment Follows-----
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
>
>
>
> -------------- next part --------------
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> Name: collection_DroolsCriteriaMatch.tar.gz
> Type: application/x-gzip
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> Url :
> http://lists.jboss.org/pipermail/rules-users/attachments/20091108/f76ced1...
> -------------- next part --------------
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> Url :
> http://lists.jboss.org/pipermail/rules-users/attachments/20091108/f76ced1...
>
> ------------------------------
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
> End of rules-users Digest, Vol 36, Issue 37
> *******************************************
>
16 years, 8 months
Class loader problem
by Hemanth kumar
hi,
Im working on a sample test project.
In that im dynamically creating a class ( fact) and compiling it.
here is my test project
--------------------------------------------------------------------------------------
mainJavaclass
public void runRule()
{
try {
System.out.println("\nRunning rule\n");
// go !
URL[] urls = new URL[]{ new
URL("file://"+path) };
URLClassLoader ucl = new
URLClassLoader(urls);
Class<?> clazz =
ucl.loadClass("test.Message");
Object classObj = clazz.newInstance();
Method method =
clazz.getDeclaredMethod("setMessage", new Class[]{String.class});
//System.out.println("facts loaded\n");
method.invoke(classObj, new
Object[]{"Hello"});
log.info("==== Calling Rule Runner ======");
Collection facts = new ArrayList();
facts.add(classObj);
// Load and fire our rules files against the
data
new
RuleRunner().runStatelessRules(RULES_FILES, null, facts, null, null,
logger);
}
catch (Throwable t) {
t.printStackTrace();
}
}
----------------------------------------------------------------------
Fact
package test;
public class Message{
private String message;
public String getMessage(){
return this.message;
}
public void setMessage(String message) {
this.message = message;
}
}
------------------------------------------------------------------------
sample rule
package test
import test.Message;
rule "Your First Rule"
dialect "mvel"
when
m:Message(message != "Good Bye" )
then
System.out.println("First Rule fired "+m.message );
modify(m){ message = "Good Bye"};
end
-----------------------------------------------------------------
http://old.nabble.com/file/p26160051/console.PNG console.PNG
what happens is when i was running the project inside eclipse IDE it works
fine but when i hosted in tomcat and calling from outside ide the rule is
not getting fired.
I think the dyanamically loaded class is not recognised by the rule engine.
suggest me any ideas or post an working example
Hemanth
--
View this message in context: http://old.nabble.com/Class-loader-problem-tp26160051p26160051.html
Sent from the drools - user mailing list archive at Nabble.com.
16 years, 8 months
Decoupling application from rules (Fact Model question)
by dbrownell83
Hi all,
I am new to drools, and getting Conway's Game of Life into Guvnor, to learn
the system.
I have hit a conceptual block. I want to decouple the application from the
rules. So...
There are 2 methods of adding a model:
1. Upload POJO model jar
2. New Declarative model
I don't want to have to re-sync everytime the jar changes, but I don't
understand how anyone would ever use #2.
One first gets the rules/app running on the local machine, for testing. So
you already have the POJOs (and inherit from it, and use it throughout the
application, as is the case with CellGridImpl).
Then one uploads to Guvnor. And this is where I am stuck.
The object model (rule imports) are: Cell, CellGrid, Neighbor, Phase,
CellState.
These already exist as POJOs (with the exception of CellGrid, which is not a
POJO, but an interface used to initialise the knowledge session). So how
does one upload the model, and not have to keep a jar file in sync?
Is one supposed to re-create the POJOs using the guided editor? (and then
still have to keep your own files in sync with Guvnor's version?)
Regards
Daniel
--
View this message in context: http://old.nabble.com/Decoupling-application-from-rules-%28Fact-Model-que...
Sent from the drools - user mailing list archive at Nabble.com.
16 years, 8 months
Suppressing reciprocal matches
by D Brock
I have defined the following rule to detect when duplicate objects (in this
example, Widgets) exist. This always produces two matches, and therefore
two messages. I understand why this occurs, but I would like for only one
message to be reported. I cannot retract one of the widgets after a match
b/c all are needed for additional rules matching. Is the a conventional way
for accomplishing the elimination of the reciprocal match?
rule "Do not allow duplicate widgets"
when
$w : Widget( $name : name )
Widget( this != $w, name == $name )
then
System.out.println( "Duplicate widgets found with name = " + $name );
end
--
View this message in context: http://old.nabble.com/Suppressing-reciprocal-matches-tp26230834p26230834....
Sent from the drools - user mailing list archive at Nabble.com.
16 years, 8 months
Re: [rules-users] some pointers for solution
by Greg Barton
Yep. See attached project. It actually simplifies the java a bit, as now there doesn't need to be any trickery in the contains method for Query. The rule now uses a from clause to get the Criteria directly from the Query:
rule "Match"
when
d : Data()
q : Query( size <= d.size )
$total : Number( intValue == q.size )
from accumulate( Criteria( this memberOf d ) from q, count(1) )
then
System.out.println("Match: " + d + " and " + q) ;
end
Try the other methods, though. (The eval 'hack' I included before, and Wolfgang's method.) All of these approaches should have different performance behavior, and I honestly don't know which one is fastest.
--- On Sun, 11/8/09, Wishing Carebear <wishing.carebear(a)gmail.com> wrote:
> From: Wishing Carebear <wishing.carebear(a)gmail.com>
> Subject: Re: [rules-users] some pointers for solution
> To: "Rules Users List" <rules-users(a)lists.jboss.org>
> Date: Sunday, November 8, 2009, 8:02 PM
> Yes Edson, I tried with count and sum.
> Both seems to be working fine.
>
> But with the test case, the Criteria for query also
> needs to be inserted in addition to the query and data
> objects like shown below:
>
> Query query = new Query(1);
> query.add(new
> Criteria(query, "c2", "bas"));
> ksession.insert(query);
> for(Criteria c :
> query) {
> ksession.insert(c);
> }
>
>
> Is it possible to avoid them.
>
> Thanks,
> cabear
>
>
>
> 2009/11/8 Edson Tirelli <ed.tirelli(a)gmail.com>
>
>
> Why not use count() accumulate function? ;)
>
>
> from accumulate( Criteria( this memberOf d, this memberOf q
> ),
>
> count(1) )
>
> Edson
>
>
>
>
>
> 2009/11/8 Greg Barton <greg_barton(a)yahoo.com>
>
> In this case
> the accumulate clause is maintaining a counter (total)
> that's incremented whenever a Criteria is detected that
> is contained in both the Data and Query object matched in
> the rule. So:
>
>
> # Find Criteria that are contained in both the Data and
> Query
>
> from accumulate( Criteria( this memberOf d, this
> memberOf q ),
> # Initialize the counter to 0
> init( int total = 0; ),
> # Increment when the above condition is matched
> action( total ++; ),
> # Decrement if a matched Criteria now fails to match
>
> reverse( total --; ),
> # return the total when all known Criteria are matched
> result( total ) )
>
>
> --- On Sun, 11/8/09, Wishing Carebear <wishing.carebear(a)gmail.com>
> wrote:
>
> > From: Wishing Carebear <wishing.carebear(a)gmail.com>
>
> > Subject: Re: [rules-users] some pointers for
> solution
> > To: "Rules Users List" <rules-users(a)lists.jboss.org>
> > Date: Sunday, November 8, 2009, 11:39 AM
>
>
>
>
> > Hi Greg:
> > I'm trying to understand your first
> > solution.
> >
> > Ran the project and it works fine. If possible could
> > you explain me little bit on :
> >
> > from accumulate( Criteria( this memberOf d,
>
> > this memberOf q ),
> > init( int total = 0; ),
> > action( total ++; ),
> > reverse( total --; ),
> > result( total ) )
> >
> >
> > Thanks,
> > cabear
> >
> >
> > 2009/11/8 Greg Barton <greg_barton(a)yahoo.com>
>
> >
> > There are a couple of
> > ways to do this. I'm sure there's a bit more
> clean
> > way than the example I'm providing, but this
> should get
> > you in the right direction. It's not 100%
> rules,
>
> > because it involves a bit of java collections
> trickery. (See
> > attached project,
> collection_DroolsCriteriaMatch.tar.gz)
> >
> >
> > The heart of it is a single rule:
> >
> > rule "Match"
>
> > when
> > d : Data()
> > q : Query( size <= d.size )
> > Number( intValue == q.size )
> > from accumulate(
> > Criteria( this memberOf d, this memberOf q ),
> >
> > init( int total = 0; ),
>
> > action( total ++; ),
> > reverse( total --; ),
> > result( total )
> > )
> > then
> > System.out.println("Match: " + d +
> "
> > and " + q) ;
> > end
>
> >
> > The Data object holds data to be queried, Query
> objects are
> > asserted to match the Data, and Criteria objects can
> be
> > contained in either. (With the aforementioned
> collections
> > trickery that if a Criteria is contained in a Query it
> can
>
> > be found in a Data object, but the reverse isn't
> true.
> > See the Query.contains(Object) method for how
> that's
> > implemented.)
> >
> >
> > So the rule above basically says "There's a
> Data
>
> > object, and all of the Query objects Criteria are
> contained
> > in the Data object."
> >
> > There's an alternate way of doing this using eval
> and a
> > bit more java fu. See the
> eval_DroolsCriteriaMatch.tar.gz
>
> > project attached. This one's probably not
> optimal,
> > though, as it's basically a brute force check of
> all
> > Data objects against the asserted Query.
> >
> >
> > I tried for a while to get a solution working with
>
> > different criteria types from both Data and Query
> objects
> > being asserted into working memory, but I couldn't
> get
> > the accumulate syntax right. Anyone know of a way to
> do
> > that? (I figure that would get a "pure
> rules"
>
> > solution.)
> >
> >
> > --- On Sat, 11/7/09, Wishing Carebear <wishing.carebear(a)gmail.com>
> > wrote:
> >
> > > From: Wishing Carebear <wishing.carebear(a)gmail.com>
>
> >
> > > Subject: [rules-users] some pointers for
> solution
> > > To: rules-users(a)lists.jboss.org
> > > Date: Saturday, November 7, 2009, 10:19 PM
>
> >
> >
> >
> > > Hello:
> > > There are n selection criteria from s1 .. sn for
> each
> > > item i1.. in. Each item can have a subset of
> criteria
> > which
> > > applies to them.
>
> > >
> > > The end user, can choose a subset of criteria
> like c1
> >
> > > and c5 and only the item that has c1 and c5
> valid
> > should be
> > > returned. For example: if item i1 and i2 have
>
> > criterias
> > > valid for c1, c2, c5, c6, c8 since the request is
> only
> > for
> > > criteria c1 and c5, i1 and i2 must be returned.
> >
> > >
> > >
> > > Is it possible to write a rule using drools for
> this
>
> > > requirement.
> > >
> > > Thanks for your help and time,
> > > cabear
> > >
> > > -----Inline Attachment Follows-----
> >
> > >
> > > _______________________________________________
>
> > > rules-users mailing list
> > > rules-users(a)lists.jboss.org
> > > https://lists.jboss.org/mailman/listinfo/rules-users
>
> >
> > >
> >
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
>
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
> >
> >
> >
> > -----Inline Attachment Follows-----
>
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users(a)lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
>
> >
>
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
>
> --
> Edson Tirelli
> JBoss Drools Core Development
> JBoss by Red Hat @ www.jboss.com
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
>
>
> -----Inline Attachment Follows-----
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
16 years, 8 months
some pointers for solution
by Wishing Carebear
Hello:
There are n selection criteria from s1 .. sn for each item i1.. in. Each
item can have a subset of criteria which applies to them.
The end user, can choose a subset of criteria like c1 and c5 and only the
item that has c1 and c5 valid should be returned. For example: if item i1
and i2 have criterias valid for c1, c2, c5, c6, c8 since the request is only
for criteria c1 and c5, i1 and i2 must be returned.
Is it possible to write a rule using drools for this requirement.
Thanks for your help and time,
cabear
16 years, 8 months
Maintaining DB/Working Memory Synchronization
by Daniel Miller
So I hope that someone out here, or many of you, can give me some idea
of how you do this.
I have about 20+ entities in my database that I want Drools to know
about. Obviously my hope is to apply CEP, rules and processes to
these items. However, I feel like I'm missing some type of connection
between how Drools recommends keeping my working memory in sync with
my database changes.
Ideally, I'd love to be able to just update my entities as I have been
doing in the database, but have those changes automatically move their
way over into the working memory. How do any of you recommend I
accomplish this?
Thanks in advance for any suggestions.
Dan Miller
16 years, 8 months
