7:17 p.m.
Hi,
I am using drools flow 5.1.1 with JPA. I want my flow to stop at a certain
point so I use an AND node with one incoming RuleGroup node and one incoming
Event node. so as AND guarantees that It executes after both of the nodes
are completed. So my flow stops there. Then i load the session from db and
use following to raise an event on the session:
StatefulKnowledgeSession session =
JPAKnowledgeService.loadStatefulKnowledgeSession(9,knowledgeBase, null,
environment);
ProcessInstance p = session.getProcessInstance(9);
System.out.println("Proc Found -> " + p);
if (p != null && p.getState()==ProcessInstance.STATE_ACTIVE)
{
p.signalEvent("Test", vo);
}
But it fails with following exception:
Exception in thread "main" java.lang.NullPointerException
at
org.drools.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:67)
at
org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.getWorkflowProcess(WorkflowProcessInstanceImpl.java:185)
at
org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:346)
at com.my.poc.PocFlowServiceImpl.processFlow(PocFlowServiceImpl.java:120)
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
org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:122)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:111)
at
org.jboss.ejb3.EJBContainerInvocationWrapper.invokeNext(EJBContainerInvocationWrapper.java:69)
at
org.jboss.ejb3.interceptors.aop.InterceptorSequencer.invoke(InterceptorSequencer.java:73)
at
org.jboss.ejb3.interceptors.aop.InterceptorSequencer.aroundInvoke(InterceptorSequencer.java:59)
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
org.jboss.aop.advice.PerJoinpointAdvice.invoke(PerJoinpointAdvice.java:174)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.fillMethod(InvocationContextInterceptor.java:72)
at
org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_fillMethod_20004366.invoke(InvocationContextInterceptor_z_fillMethod_20004366.java)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.setup(InvocationContextInterceptor.java:88)
at
org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_setup_20004366.invoke(InvocationContextInterceptor_z_setup_20004366.java)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:62)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:56)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.tx.StatelessBMTInterceptor.handleInvocation(StatelessBMTInterceptor.java:106)
at org.jboss.ejb3.tx.BMTInterceptor.invoke(BMTInterceptor.java:55)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:68)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:186)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:421)
at
org.jboss.ejb3.session.InvokableContextClassProxyHack._dynamicInvoke(InvokableContextClassProxyHack.java:53)
at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:91)
at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:891)
at
org.jboss.remoting.transport.socket.ServerThread.completeInvocation(ServerThread.java:744)
at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:697)
at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:524)
at
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:211)
at org.jboss.remoting.Client.invoke(Client.java:1724)
at org.jboss.remoting.Client.invoke(Client.java:629)
at
org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:60)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.security.client.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:65)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:74)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:62)
at $Proxy3.invoke(Unknown Source)
at
org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:207)
at
org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:164)
at $Proxy2.processFlow(Unknown Source)
at net.plus.kbd.poc.StartFlow.main(StartFlow.java:39)
at
org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:72)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.security.client.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:65)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:74)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:62)
at $Proxy3.invoke(Unknown Source)
at
org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:207)
at
org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:164)
at $Proxy2.processFlow(Unknown Source)
at com.my.poc.StartFlow.main(StartFlow.java:39)
Then i tried to use this code:
SignalEventCommand command = new SignalEventCommand();
command.setProcessInstanceId(9);
command.setEventType("Test");
command.setEvent(true);
session.execute(command);
But it fails:
Exception in thread "main" java.lang.NoSuchMethodError:
org.drools.runtime.StatefulKnowledgeSession.execute(Lorg/drools/command/Command;)Lorg/drools/runtime/ExecutionResults;
at com.my.poc.PocFlowServiceImpl.processFlow(PocFlowServiceImpl.java:127)
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
org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:122)
Although I have drools jars in my classpath. All required jars including
drools-core-5.1.1.jar
Any idea how can i raise an event ??
Thanks
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2:44 p.m.
Done some more debugging and It looks like the ProcessInstance is failing
while trying to get process. Here is what I found from the drools 5.1 source
code:
org/drools/process/instance/impl/ProcessInstanceImpl.java
public Process getProcess() {
if (this.process == null) {
this.process = ( Process ) ((InternalRuleBase)
workingMemory.getRuleBase())
.getProcess(processId);
}
return this.process;
}
And it appears that workingMemory is a transient variable and when I load
the session from db i guess this workingMemory is not being set hence throws
NullPointerException. Here is how it is defined:
private transient InternalWorkingMemory workingMemory;
But still not able to find out the problem executing SignalEventCommand
using session still getting exception:
Exception in thread "main" java.lang.NoSuchMethodError:
org.drools.runtime.StatefulKnowledgeSession.execute(Lorg/drools/command/Command;)Lorg/drools/runtime/ExecutionResults;
I've also tried to call signalEvent method on Session.
StatefulKnowledgeSession session =
JPAKnowledgeService.loadStatefulKnowledgeSession(3,knowledgeBase, null,
environment);
session.signalEvent("Test", vo);
It signals event but It signals event to all the processes pending in db
instead of just for the process attached with the passed session id (3 in
this case). Any idea why is it doing that?
Thanks
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11:09 a.m.
Any idea anyone? No one knows how to raise an event on session/flow?
Thanks
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12:12 p.m.
Hello,
I sent to Kris informations, that message event in for each element don't works. When
the message event is on first level of the flow diagram (not in other containers) the
signaling works for me.
M.
-----Původní zpráva-----
Od: rules-users-bounces(a)lists.jboss.org za uživatele jawa
Odesláno: st 15.9.2010 11:09
Komu: rules-users(a)lists.jboss.org
Předmět: Re: [rules-users] Drools Flow Events Not Working
Any idea anyone? No one knows how to raise an event on session/flow?
Thanks
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_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
12:55 p.m.
Thanks for your reply. I am not using for each element. I am just using AND
node with a message event and another node coming to it so process stops
there and wait for the signal. Then I signal event as I mentioned in my
posts above but get into problems as I've mentioned in my previous posts.
How do you signal event? and are you using JPA service to persist your flow?
Or are you just doing in memory? It works for in memory but doesn't work
when i use JPA backed flow.
Thanks
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5:29 p.m.
Hi,
The process instance should automatically be reconnected to the session (=
working memory) when it is reloaded from the database. It is a little
unclear however, from you stacktrace, how you get a reference to your
process instance after it has been restored. Particularly:
org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent
(WorkflowProcessInstanceImpl.java:346)
at com.my.poc.PocFlowServiceImpl.processFlow(PocFlowServiceImpl.java:120)
Could you share how this PocFlowServiceImpl class gets the process instance
it then tries to signal? Does it retrieve the session from the session? Or
does it keep a reference from before?
Kris
----- Original Message -----
From: "jawa" <agohar(a)gmail.com>
To: <rules-users(a)lists.jboss.org>
Sent: Friday, September 10, 2010 7:17 PM
Subject: [rules-users] Drools Flow Events Not Working
Hi,
I am using drools flow 5.1.1 with JPA. I want my flow to stop at a certain
point so I use an AND node with one incoming RuleGroup node and one
incoming
Event node. so as AND guarantees that It executes after both of the nodes
are completed. So my flow stops there. Then i load the session from db and
use following to raise an event on the session:
StatefulKnowledgeSession session =
JPAKnowledgeService.loadStatefulKnowledgeSession(9,knowledgeBase, null,
environment);
ProcessInstance p = session.getProcessInstance(9);
System.out.println("Proc Found -> " + p);
if (p != null && p.getState()==ProcessInstance.STATE_ACTIVE)
{
p.signalEvent("Test", vo);
}
But it fails with following exception:
Exception in thread "main" java.lang.NullPointerException
at
org.drools.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:67)
at
org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.getWorkflowProcess(WorkflowProcessInstanceImpl.java:185)
at
org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:346)
at com.my.poc.PocFlowServiceImpl.processFlow(PocFlowServiceImpl.java:120)
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
org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:122)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:111)
at
org.jboss.ejb3.EJBContainerInvocationWrapper.invokeNext(EJBContainerInvocationWrapper.java:69)
at
org.jboss.ejb3.interceptors.aop.InterceptorSequencer.invoke(InterceptorSequencer.java:73)
at
org.jboss.ejb3.interceptors.aop.InterceptorSequencer.aroundInvoke(InterceptorSequencer.java:59)
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
org.jboss.aop.advice.PerJoinpointAdvice.invoke(PerJoinpointAdvice.java:174)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.fillMethod(InvocationContextInterceptor.java:72)
at
org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_fillMethod_20004366.invoke(InvocationContextInterceptor_z_fillMethod_20004366.java)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.setup(InvocationContextInterceptor.java:88)
at
org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_setup_20004366.invoke(InvocationContextInterceptor_z_setup_20004366.java)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:62)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:56)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.tx.StatelessBMTInterceptor.handleInvocation(StatelessBMTInterceptor.java:106)
at org.jboss.ejb3.tx.BMTInterceptor.invoke(BMTInterceptor.java:55)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:68)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:186)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:421)
at
org.jboss.ejb3.session.InvokableContextClassProxyHack._dynamicInvoke(InvokableContextClassProxyHack.java:53)
at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:91)
at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:891)
at
org.jboss.remoting.transport.socket.ServerThread.completeInvocation(ServerThread.java:744)
at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:697)
at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:524)
at
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232)
at
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:211)
at org.jboss.remoting.Client.invoke(Client.java:1724)
at org.jboss.remoting.Client.invoke(Client.java:629)
at
org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:60)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.security.client.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:65)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:74)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:62)
at $Proxy3.invoke(Unknown Source)
at
org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:207)
at
org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:164)
at $Proxy2.processFlow(Unknown Source)
at net.plus.kbd.poc.StartFlow.main(StartFlow.java:39)
at
org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:72)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.security.client.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:65)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at
org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:74)
at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:62)
at $Proxy3.invoke(Unknown Source)
at
org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:207)
at
org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:164)
at $Proxy2.processFlow(Unknown Source)
at com.my.poc.StartFlow.main(StartFlow.java:39)
Then i tried to use this code:
SignalEventCommand command = new SignalEventCommand();
command.setProcessInstanceId(9);
command.setEventType("Test");
command.setEvent(true);
session.execute(command);
But it fails:
Exception in thread "main" java.lang.NoSuchMethodError:
org.drools.runtime.StatefulKnowledgeSession.execute(Lorg/drools/command/Command;)Lorg/drools/runtime/ExecutionResults;
at com.my.poc.PocFlowServiceImpl.processFlow(PocFlowServiceImpl.java:127)
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
org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:122)
Although I have drools jars in my classpath. All required jars including
drools-core-5.1.1.jar
Any idea how can i raise an event ??
Thanks
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3:11 p.m.
Hi Kris,
Thanks for your reply. A little background, I start drools flow process by
creating a new session using JPA service and I've an AND node which has two
incoming connections one from a RuleGroup node and another from an event
node so it stops and waits until the event is signaled. Then I go to db and
get the session id from SessionInfo table and Process id from ProcessInfo
table and use this code to lookup both:
StatefulKnowledgeSession session =
JPAKnowledgeService.loadStatefulKnowledgeSession(9,knowledgeBase, null,
environment);
ProcessInstance p = session.getProcessInstance(9);
System.out.println("Proc Found -> " + p);
if (p != null && p.getState()==ProcessInstance.STATE_ACTIVE)
{
p.signalEvent("Test", vo);
}
As you can see session id and process id are both hard coded in my code. Its
just for my testing purposes. So I load session then call getProcessInstance
method on it with the relevant process id then call signal event on that
process instance.
Thanks
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10:09 a.m.
Any idea anyone please?
Thanks
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3:31 p.m.
I would like to help you..
what's the outcome of the p.signalEvent("Test", vo); call?
In which state is the process waiting when you do that call?
copy the stacktrace that you get from the last piece of code.
Greetings.
On Fri, Sep 24, 2010 at 5:09 AM, jawa <agohar(a)gmail.com> wrote:
Any idea anyone please?
Thanks
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5:25 p.m.
Thanks mate
It throws NullPointerException. Here is what I do. I start process and it
stops at an AND node waiting for event to complete. The process is backed
up by JPA and is stored in db. Then I modify my test class and instead of
creating session i load existing session. For example when i run my last
test first time, it created a new session in db with id 18 and new process
in db with id 24. So I use this code:
StatefulKnowledgeSession session =
JPAKnowledgeService.loadStatefulKnowledgeSession(18,knowledgeBase, null,
environment);
WorkItemManager manager = session.getWorkItemManager();
manager.registerWorkItemHandler("Human Task", new
MyWorkItemHandler(true));
ProcessInstance p = session.getProcessInstance(24);
System.out.println("Proc Found -> " + p.getClass());
if (p != null && p.getState()==ProcessInstance.STATE_ACTIVE)
{
p.signalEvent("TestEvent", null);
}
The debug statement above displays "Proc Found -> class
org.drools.ruleflow.instance.RuleFlowProcessInstance"
And I get exception:
15:41:29,528 ERROR [STDERR] java.lang.NullPointerException
15:41:29,528 ERROR [STDERR] at
org.drools.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:67)
15:41:29,529 ERROR [STDERR] at
org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.getWorkflowProcess(WorkflowProcessInstanceImpl.java:185)
15:41:29,529 ERROR [STDERR] at
org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:346)
15:41:29,529 ERROR [STDERR] at
com.my.poc.PocFlowServiceImpl.processFlow(PocFlowServiceImpl.java:117)
15:41:29,529 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
15:41:29,529 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
15:41:29,529 ERROR [STDERR] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
15:41:29,529 ERROR [STDERR] at
java.lang.reflect.Method.invoke(Method.java:597)
15:41:29,529 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:122)
15:41:29,529 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:111)
15:41:29,529 ERROR [STDERR] at
org.jboss.ejb3.EJBContainerInvocationWrapper.invokeNext(EJBContainerInvocationWrapper.java:69)
15:41:29,529 ERROR [STDERR] at
org.jboss.ejb3.interceptors.aop.InterceptorSequencer.invoke(InterceptorSequencer.java:73)
15:41:29,529 ERROR [STDERR] at
org.jboss.ejb3.interceptors.aop.InterceptorSequencer.aroundInvoke(InterceptorSequencer.java:59)
15:41:29,531 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
15:41:29,531 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
15:41:29,531 ERROR [STDERR] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
15:41:29,531 ERROR [STDERR] at
java.lang.reflect.Method.invoke(Method.java:597)
15:41:29,531 ERROR [STDERR] at
org.jboss.aop.advice.PerJoinpointAdvice.invoke(PerJoinpointAdvice.java:174)
15:41:29,531 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,531 ERROR [STDERR] at
org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.fillMethod(InvocationContextInterceptor.java:72)
15:41:29,532 ERROR [STDERR] at
org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_fillMethod_30161834.invoke(InvocationContextInterceptor_z_fillMethod_30161834.java)
15:41:29,532 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,532 ERROR [STDERR] at
org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.setup(InvocationContextInterceptor.java:88)
15:41:29,532 ERROR [STDERR] at
org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_setup_30161834.invoke(InvocationContextInterceptor_z_setup_30161834.java)
15:41:29,532 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,532 ERROR [STDERR] at
org.jboss.ejb3.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:62)
15:41:29,575 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,575 ERROR [STDERR] at
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:56)
15:41:29,575 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
15:41:29,576 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.tx.StatelessBMTInterceptor.handleInvocation(StatelessBMTInterceptor.java:106)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.tx.BMTInterceptor.invoke(BMTInterceptor.java:55)
15:41:29,576 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:68)
15:41:29,576 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
15:41:29,576 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
15:41:29,576 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,577 ERROR [STDERR] at
org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:186)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,577 ERROR [STDERR] at
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,577 ERROR [STDERR] at
org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,577 ERROR [STDERR] at
org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,577 ERROR [STDERR] at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:421)
15:41:29,577 ERROR [STDERR] at
org.jboss.ejb3.session.InvokableContextClassProxyHack._dynamicInvoke(InvokableContextClassProxyHack.java:53)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.Dispatcher.invoke(Dispatcher.java:91)
15:41:29,579 ERROR [STDERR] at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
15:41:29,579 ERROR [STDERR] at
org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:891)
15:41:29,579 ERROR [STDERR] at
org.jboss.remoting.transport.socket.ServerThread.completeInvocation(ServerThread.java:744)
15:41:29,579 ERROR [STDERR] at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:697)
15:41:29,579 ERROR [STDERR] at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:524)
15:41:29,579 ERROR [STDERR] at
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232)
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5:37 p.m.
hmm looks weird.. can you debug and review if the process is in the
NodeInstance that it's supposed to be?
On Fri, Sep 24, 2010 at 12:25 PM, jawa <agohar(a)gmail.com> wrote:
Thanks mate
It throws NullPointerException. Here is what I do. I start process and it
stops at an AND node waiting for event to complete. The process is backed
up by JPA and is stored in db. Then I modify my test class and instead of
creating session i load existing session. For example when i run my last
test first time, it created a new session in db with id 18 and new process
in db with id 24. So I use this code:
StatefulKnowledgeSession session =
JPAKnowledgeService.loadStatefulKnowledgeSession(18,knowledgeBase, null,
environment);
WorkItemManager manager = session.getWorkItemManager();
manager.registerWorkItemHandler("Human Task", new
MyWorkItemHandler(true));
ProcessInstance p = session.getProcessInstance(24);
System.out.println("Proc Found -> " + p.getClass());
if (p != null &&
p.getState()==ProcessInstance.STATE_ACTIVE)
{
p.signalEvent("TestEvent", null);
}
The debug statement above displays "Proc Found -> class
org.drools.ruleflow.instance.RuleFlowProcessInstance"
And I get exception:
15:41:29,528 ERROR [STDERR] java.lang.NullPointerException
15:41:29,528 ERROR [STDERR] at
org.drools.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:67)
15:41:29,529 ERROR [STDERR] at
org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.getWorkflowProcess(WorkflowProcessInstanceImpl.java:185)
15:41:29,529 ERROR [STDERR] at
org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:346)
15:41:29,529 ERROR [STDERR] at
com.my.poc.PocFlowServiceImpl.processFlow(PocFlowServiceImpl.java:117)
15:41:29,529 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
15:41:29,529 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
15:41:29,529 ERROR [STDERR] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
15:41:29,529 ERROR [STDERR] at
java.lang.reflect.Method.invoke(Method.java:597)
15:41:29,529 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:122)
15:41:29,529 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:111)
15:41:29,529 ERROR [STDERR] at
org.jboss.ejb3.EJBContainerInvocationWrapper.invokeNext(EJBContainerInvocationWrapper.java:69)
15:41:29,529 ERROR [STDERR] at
org.jboss.ejb3.interceptors.aop.InterceptorSequencer.invoke(InterceptorSequencer.java:73)
15:41:29,529 ERROR [STDERR] at
org.jboss.ejb3.interceptors.aop.InterceptorSequencer.aroundInvoke(InterceptorSequencer.java:59)
15:41:29,531 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
15:41:29,531 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
15:41:29,531 ERROR [STDERR] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
15:41:29,531 ERROR [STDERR] at
java.lang.reflect.Method.invoke(Method.java:597)
15:41:29,531 ERROR [STDERR] at
org.jboss.aop.advice.PerJoinpointAdvice.invoke(PerJoinpointAdvice.java:174)
15:41:29,531 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,531 ERROR [STDERR] at
org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.fillMethod(InvocationContextInterceptor.java:72)
15:41:29,532 ERROR [STDERR] at
org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_fillMethod_30161834.invoke(InvocationContextInterceptor_z_fillMethod_30161834.java)
15:41:29,532 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,532 ERROR [STDERR] at
org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.setup(InvocationContextInterceptor.java:88)
15:41:29,532 ERROR [STDERR] at
org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_setup_30161834.invoke(InvocationContextInterceptor_z_setup_30161834.java)
15:41:29,532 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,532 ERROR [STDERR] at
org.jboss.ejb3.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:62)
15:41:29,575 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,575 ERROR [STDERR] at
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:56)
15:41:29,575 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
15:41:29,576 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.tx.StatelessBMTInterceptor.handleInvocation(StatelessBMTInterceptor.java:106)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.tx.BMTInterceptor.invoke(BMTInterceptor.java:55)
15:41:29,576 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:68)
15:41:29,576 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
15:41:29,576 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
15:41:29,576 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,576 ERROR [STDERR] at
org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,577 ERROR [STDERR] at
org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:186)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,577 ERROR [STDERR] at
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,577 ERROR [STDERR] at
org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,577 ERROR [STDERR] at
org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
15:41:29,577 ERROR [STDERR] at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:421)
15:41:29,577 ERROR [STDERR] at
org.jboss.ejb3.session.InvokableContextClassProxyHack._dynamicInvoke(InvokableContextClassProxyHack.java:53)
15:41:29,577 ERROR [STDERR] at
org.jboss.aop.Dispatcher.invoke(Dispatcher.java:91)
15:41:29,579 ERROR [STDERR] at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
15:41:29,579 ERROR [STDERR] at
org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:891)
15:41:29,579 ERROR [STDERR] at
org.jboss.remoting.transport.socket.ServerThread.completeInvocation(ServerThread.java:744)
15:41:29,579 ERROR [STDERR] at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:697)
15:41:29,579 ERROR [STDERR] at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:524)
15:41:29,579 ERROR [STDERR] at
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:232)
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- Salatino "Salaboy" Mauricio -
6:07 p.m.
Yes I did some debugging and I read the bytes against that Process in
database and it is all fine and process is stopped at the AND node and
waiting for signal to come. Also I looked in drools source and found below
in class
org/drools/process/instance/impl/ProcessInstanceImpl.java
public Process getProcess() {
if (this.process == null) {
this.process = ( Process ) ((InternalRuleBase)
workingMemory.getRuleBase())
.getProcess(processId);
}
return this.process;
}
It appears that workingMemory is a transient variable and when I load the
session from db i guess this workingMemory is not being set hence throws
NullPointerException. Here is how it is defined:
private transient InternalWorkingMemory workingMemory;
Don't know why this workingMemory not get set. Or do I need to do anything
extra to set it after loading stateful knowledge session from db?
Thanks
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11:56 a.m.
hi, has anyone successfully raised even on a persisted drools flow or is it a
bug?
Thanks
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6:24 p.m.
Finally I've fixed the problem
Exception in thread "main" java.lang.NoSuchMethodError:
org.drools.runtime.StatefulKnowledgeSession.execute(Lorg/drools/command/Command;)Lorg/drools/runtime/ExecutionResults;
It was caused because I was compiling my code against drools version 5.1.0
and was running it against 5.1.1 :(
Thanks to all who replied.
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10:47 p.m.
New subject: Drools Flow Events Not Working - FIXED
just updating the subject to Fixed, so that it wud be helpful for other users
to directly look for solution.
-drooRam
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4965
days inactive
4985
days old
14 comments
5 participants
participants (5)
-
drooRam -
jawa -
Kris Verlaenen -
Mauricio Salatino -
Vlach Miloslav