6:03 a.m.
Hi Ronald
Thanks for advice... I re-implemented ForEachFork and ForEachJoin for jbpm4 by using the
code in ForkActivity and JoinActivity. Instead of using sub-process I used
"group".
I tried to execute "groups" concurrently in the fork by labeling them with
"continue=async".
But it created a lot of database level problems.
Then, I decided to test this with original JBPM functionality but again I got exceptions.
My question is --> Is there a way to execute "groups" async with Fork-Join or
Do you suggest something else?
Please check following information.
| <?xml version="1.0" encoding="UTF-8"?>
|
| <process name="testForkJoin"
xmlns="http://jbpm.org/4.0/jpdl">
|
| <start name="start1" g="255,53,48,48">
| <transition name="to state1" to="state1"
g="-63,-22" />
| </start>
|
| <custom g="198,134,157,52" name="state1"
class="com.actions.RandomActivity">
| <transition to="fork1" g="-52,-22" />
| </custom>
|
| <fork name="fork1" g="252,291,48,48">
| <transition name="to state2" to="state2"
g="-63,-22" />
| <transition name="to state3" to="state3"
g="-63,-22" />
| </fork>
|
| <group name="state2">
| <start>
| <transition to="state4" />
| </start>
|
| <custom g="198,134,157,52" name="state4"
class="com.actions.RandomActivity" continue="async">
| <transition to="groupDone1" g="-52,-22" />
| </custom>
|
| <end name="groupDone1" />
| <transition to="join1" />
| </group>
|
| <group name="state3" continue="async">
| <start>
| <transition to="state5" />
| </start>
|
| <custom g="198,134,157,52" name="state5"
class="com.actions.RandomActivity" continue="async">
| <transition to="groupDone2" g="-52,-22" />
| </custom>
|
| <end name="groupDone2" />
| <transition to="join1" />
| </group>
|
|
| <join name="join1" g="256,461,48,48">
| <transition name="to end1" to="end1"
g="-54,-22" />
| </join>
| <end name="end1" g="263,568,48,48" />
| </process>
|
and Simple RandomActivity
| public void execute(ActivityExecution ae) throws Exception {
| System.out.println("in random activity");
| for(int i=0; i < 10; i++){
| Thread.sleep(10);
| System.out.println(Thread.currentThread().getName()+":"+i);
| }
| }
|
anonymous wrote :
| Here is the exception
|
| SEVERE: Could not synchronize database state with session
| org.hibernate.StaleObjectStateException: Row was updated or deleted by another
transaction (or unsaved-value mapping was incorrect):
[org.jbpm.pvm.internal.model.ExecutionImpl#3]
| at
org.hibernate.persister.entity.AbstractEntityPersister.check(AbstractEntityPersister.java:1792)
| at
org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2435)
| at
org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2335)
| at
org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2635)
| at
org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:115)
| at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
| at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)
| at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:168)
| at
org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
| at
org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)
| at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027)
| at
org.jbpm.pvm.internal.tx.HibernateSessionResource.prepare(HibernateSessionResource.java:54)
| at
org.jbpm.pvm.internal.tx.StandardTransaction.commit(StandardTransaction.java:106)
| at
org.jbpm.pvm.internal.tx.StandardTransaction.complete(StandardTransaction.java:65)
| at
org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:61)
| at
org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:54)
| at
org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55)
| at
org.jbpm.pvm.internal.svc.ExecutionServiceImpl.startProcessInstanceByKey(ExecutionServiceImpl.java:70)
| at
com.playphone.alexander.afp.workFlowProcessor.TestWorkFlow.testForkJoinGroup(TestWorkFlow.java:63)
| 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 junit.framework.TestCase.runTest(TestCase.java:154)
| at junit.framework.TestCase.runBare(TestCase.java:127)
| at junit.framework.TestResult$1.protect(TestResult.java:106)
| at junit.framework.TestResult.runProtected(TestResult.java:124)
| at junit.framework.TestResult.run(TestResult.java:109)
| at junit.framework.TestCase.run(TestCase.java:118)
| at junit.framework.TestSuite.runTest(TestSuite.java:208)
| at junit.framework.TestSuite.run(TestSuite.java:203)
| 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.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213)
| at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
| at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
| at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
| 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.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:345)
| at
org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1009)
|
|
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