9:58 a.m.
I'm using Jboss Seam 2.0.1.GA with jbpm 3.2.3.GA.
I have a simple process that has a process-state in it. Sometimes, I need to cancel the
parent process instance, which should also cancel the child (process-state) process
instance, if the child happens to be open.
Once the child process is in the wait state if I find the parent process instance and call
the end() method then I get an error.
The error is complaining that the getVariable method is returning null, which is fair
enough as presumably its just been cancelled. But why that code even being evaluated?
To me the process appears to be continuing execution instead of ending it immediately. Is
this the correct behaviour or am I doing something unexpected? Any help with this would be
much appreciated. Full details below.
Thanks in advance,
Pete.
Code used to cancel the parent process
| public void cancel() {
| Query query =
getJbpmContext().getSession().getNamedQuery("processInstanceId.findByNameUnended")
;
| query.setParameter("name", "parentCancel") ;
|
| for (Long pid : (List<Long>)query.list()) {
| log.info("Ending process #0", pid) ;
| ProcessInstance processInstance =
getJbpmContext().getProcessInstanceForUpdate(pid) ;
| processInstance.end() ;
| }
|
|
| }
|
Here are the definitions:
parent:
| <?xml version="1.0" encoding="UTF-8"?>
| <process-definition xmlns="urn:jbpm.org:jpdl-3.2"
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
| xsi:schemaLocation="urn:jbpm.org:jpdl-3.2
http://jbpm.org/xsd/jpdl-3.2.xsd"
| name="parentCancel" >
|
| <start-state name="start">
| <transition to="waitForSomething"></transition>
| </start-state>
|
| <process-state name="waitForSomething">
| <sub-process name="childCancel"/>
| <variable name="waitForSomethingOutcome" access="write"
mapped-name="outcome" />
| <transition to="checkOutcome"></transition>
| </process-state>
|
| <decision name="checkOutcome"
expression="#{processStateCancelTest.getVariable('waitForSomethingOutcome')}">
| <transition to="success"
name="successOutcome"></transition>
| <transition to="fail"
name="failOutcome"></transition>
| </decision>
| <end-state name="fail">
| </end-state>
| <end-state name="success">
| </end-state>
| </process-definition>
|
child
| <?xml version="1.0" encoding="UTF-8"?>
| <process-definition xmlns="urn:jbpm.org:jpdl-3.2"
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
| xsi:schemaLocation="urn:jbpm.org:jpdl-3.2
http://jbpm.org/xsd/jpdl-3.2.xsd"
| name="childCancel" >
|
| <start-state name="start">
| <transition to="waitingNode"></transition>
| </start-state>
|
|
| <state name="waitingNode">
| <transition to="done" name="success">
| <action
expression="#{processStateCancelTest.setVariable('outcome',
'successOutcome')}" />
| </transition>
| <transition to="done" name="failure">
| <action
expression="#{processStateCancelTest.setVariable('outcome',
'failOutcome')}" />
| </transition>
| </state>
|
| <end-state name="done">
| </end-state>
| </process-definition>
|
Here is the full log stack trace when end is called:
| 15:24:11,682 INFO [uk.co.iblocks.ProcessStateCancelTest] Ending process 2267
(parentCancel)
| 15:24:11,726 INFO [uk.co.iblocks.ProcessStateCancelTest] process-end on
ProcessDefinition(childCancel) (process definition ProcessDefinition(childCancel))
| 15:24:11,768 INFO [uk.co.iblocks.ProcessStateCancelTest] before-signal on
ProcessState(waitForSomething) (process definition ProcessDefinition(parentCancel))
| 15:24:11,803 INFO [uk.co.iblocks.ProcessStateCancelTest] node-leave on
ProcessState(waitForSomething) (process definition ProcessDefinition(parentCancel))
| 15:24:11,836 INFO [uk.co.iblocks.ProcessStateCancelTest] node-enter on
Decision(checkOutcome) (process definition ProcessDefinition(parentCancel))
| 15:24:11,844 WARN [uk.co.iblocks.ProcessStateCancelTest] Cannot access
waitForSomethingOutcome in process parentCancel
| 15:24:11,847 DEBUG [uk.co.iblocks.ProcessStateCancelTest] Process parentCancel,
returing variable waitForSomethingOutcome=null
| 15:24:11,863 FATAL [javax.enterprise.resource.webcontainer.jsf.application]
/processTest.xhtml @51,165
action="#{processStateCancelTest.cancel('parentCancel')}":
org.jbpm.JbpmException: decision expression
'#{processStateCancelTest.getVariable('waitForSomethingOutcome')}'
returned null
| javax.faces.el.EvaluationException: /processTest.xhtml @51,165
action="#{processStateCancelTest.cancel('parentCancel')}":
org.jbpm.JbpmException: decision expression
'#{processStateCancelTest.getVariable('waitForSomethingOutcome')}'
returned null
| at org.jbpm.graph.node.Decision.execute(Decision.java:97)
| at org.jbpm.graph.def.Node.enter(Node.java:318)
| 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.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173)
| at org.jbpm.graph.def.Node_$$_javassist_171.enter(Node_$$_javassist_171.java)
| at org.jbpm.graph.def.Transition.take(Transition.java:151)
| at org.jbpm.graph.def.Node.leave(Node.java:393)
| at org.jbpm.graph.node.ProcessState.leave(ProcessState.java:224)
| 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.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173)
| at org.jbpm.graph.def.Node_$$_javassist_171.leave(Node_$$_javassist_171.java)
| at org.jbpm.graph.exe.Token.signal(Token.java:192)
| at org.jbpm.graph.exe.Token.signal(Token.java:168)
| 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.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:179)
| at org.jbpm.graph.exe.Token_$$_javassist_107.signal(Token_$$_javassist_107.java)
| at org.jbpm.graph.exe.ProcessInstance.end(ProcessInstance.java:322)
| 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.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173)
| at
org.jbpm.graph.exe.ProcessInstance_$$_javassist_176.end(ProcessInstance_$$_javassist_176.java)
| at org.jbpm.graph.exe.Token.notifyParentOfTokenEnd(Token.java:329)
| at org.jbpm.graph.exe.Token.end(Token.java:301)
| at org.jbpm.graph.exe.Token.end(Token.java:251)
| 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.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173)
| at org.jbpm.graph.exe.Token_$$_javassist_107.end(Token_$$_javassist_107.java)
| at org.jbpm.graph.exe.ProcessInstance.end(ProcessInstance.java:302)
| 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.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173)
| at
org.jbpm.graph.exe.ProcessInstance_$$_javassist_176.end(ProcessInstance_$$_javassist_176.java)
| at org.jbpm.graph.exe.Token.end(Token.java:283)
| at org.jbpm.graph.exe.Token.end(Token.java:251)
| 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.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:173)
| at org.jbpm.graph.exe.Token_$$_javassist_107.end(Token_$$_javassist_107.java)
| at org.jbpm.graph.exe.ProcessInstance.end(ProcessInstance.java:302)
| at
uk.co.iblocks.midas.workflow.ProcessStateCancelTest.cancel(ProcessStateCancelTest.java:37)
| 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.seam.util.Reflections.invoke(Reflections.java:21)
| at
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
| at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
| at
org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
| at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
| at
org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:38)
| at org.jboss.seam.util.Work.workInTransaction(Work.java:40)
| at
org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:32)
| at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
| at
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
| at
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
| at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
| at
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:166)
| at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:102)
| at
uk.co.iblocks.midas.workflow.ProcessStateCancelTest_$$_javassist_12.cancel(ProcessStateCancelTest_$$_javassist_12.java)
| 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.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:329)
| at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:274)
| at org.jboss.el.parser.AstMethodSuffix.getValue(AstMethodSuffix.java:59)
| at org.jboss.el.parser.AstMethodSuffix.invoke(AstMethodSuffix.java:65)
| at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
| at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
| at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
| at com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:69)
|
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