8:44 a.m.
Hi,
As a number of posters of this forum I'm trying to create a timer in my node action
handler. When the timer expires, it should push the process along the "time-out"
transition. And that's it. But I can't make it work. Even after an extensive look
to the documentation and forums...
Having seen a number of code examples in this forum, I imitated it:
| Duration duration = new Duration(timeout/1000 + " seconds");
| BusinessCalendar businessCalendar = new BusinessCalendar();
| Date dueDate = businessCalendar.add(new Date(), duration);
| Timer timer = new Timer( executionContext.getToken() );
| timer.setName( name );
| timer.setDueDate( dueDate );
| timer.setTransitionName( transitionName );
| timer.setGraphElement( executionContext.getEventSource() );
| timer.setTaskInstance( executionContext.getTaskInstance() );
| timer.setAction();
| SchedulerService schedulerService = (SchedulerService)
Services.getCurrentService( Services.SERVICENAME_SCHEDULER );
| schedulerService.createTimer( timer );
|
The process is kicked-off without any problem, but when the timer expires I'm getting
the exception described underneath:
| 15:31:17,677 ERROR [Services] problem closing service 'persistence'
| org.jbpm.persistence.JbpmPersistenceException: couldn't commit hibernate session
| at
org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:172)
| at org.jbpm.svc.Services.close(Services.java:211)
| at org.jbpm.JbpmContext.close(JbpmContext.java:139)
| at
org.jbpm.scheduler.impl.SchedulerThread.executeTimers(SchedulerThread.java:161)
| at org.jbpm.scheduler.impl.SchedulerThread.run(SchedulerThread.java:70)
| Caused by: org.hibernate.StaleStateException: Batch update returned unexpected row
count from update [0]; actual row count: 0; expected: 1
| at
org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61)
| at
org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46)
| at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68)
| at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
| at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242)
| at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)
| at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:144)
| at
org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
| at
org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
| at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
| at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
| at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
| at
org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:162)
| ... 4 more
| 15:31:17,679 INFO [SchedulerThread] runtime exception while executing timers
| org.jbpm.JbpmException: problem closing services
{persistence=org.jbpm.persistence.JbpmPersistenceException: couldn't commit hibernate
session}
| at org.jbpm.svc.Services.close(Services.java:223)
| at org.jbpm.JbpmContext.close(JbpmContext.java:139)
| at
org.jbpm.scheduler.impl.SchedulerThread.executeTimers(SchedulerThread.java:161)
| at org.jbpm.scheduler.impl.SchedulerThread.run(SchedulerThread.java:70)
| Caused by: org.jbpm.persistence.JbpmPersistenceException: couldn't commit
hibernate session
| at
org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:172)
| at org.jbpm.svc.Services.close(Services.java:211)
| ... 3 more
| Caused by: org.hibernate.StaleStateException: Batch update returned unexpected row
count from update [0]; actual row count: 0; expected: 1
| at
org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61)
| at
org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46)
| at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68)
| at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
| at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242)
| at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)
| at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:144)
| at
org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
| at
org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
| at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
| at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
| at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
| at
org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:162)
| ... 4 more
|
I've had a look into the JBPM_TIMER table; compared to a timer created from the
process definition. With strikes me is that the columns for the action, graph element type
and graph element are null. While the row for the timer created with the process
definition has values for it.
Modifying the code sample as follows does fill in the graph element columns:
| timer.setGraphElement( executionContext.getEventSource() );
| replaced by
| timer.setGraphElement( executionContext.getNode() );
|
(getEventSource() is always null for me by the way...)
The action column remains empty though. And setting an action to the timer with the
Timer.setAction( Action ) method results in the next exception:
15:27:54,517 ERROR [STDERR] org.jbpm.JbpmException: problem closing services
{persistence=org.jbpm.persistence.JbpmPersistenceException: couldn't commit hibernate
session}
| 15:27:54,518 ERROR [STDERR] at org.jbpm.svc.Services.close(Services.java:223)
| 15:27:54,518 ERROR [STDERR] at org.jbpm.JbpmContext.close(JbpmContext.java:139)
| 15:27:54,518 ERROR [STDERR] at
com.luciad.oldi.server.ejb.messagebroker.TLcdOLDIMessageBroker.onMessage(TLcdOLDIMessageBroker.java:160)
| 15:27:54,518 ERROR [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
| 15:27:54,518 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
| 15:27:54,518 ERROR [STDERR] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
| 15:27:54,519 ERROR [STDERR] at java.lang.reflect.Method.invoke(Method.java:585)
| 15:27:54,519 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
| 15:27:54,519 ERROR [STDERR] at
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
| 15:27:54,519 ERROR [STDERR] at
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
| 15:27:54,519 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 15:27:54,519 ERROR [STDERR] at
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
| 15:27:54,519 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 15:27:54,519 ERROR [STDERR] at
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
| 15:27:54,520 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 15:27:54,520 ERROR [STDERR] at
org.jboss.aspects.tx.TxPolicy.invokeInNoTx(TxPolicy.java:66)
| 15:27:54,520 ERROR [STDERR] at
org.jboss.aspects.tx.TxInterceptor$Never.invoke(TxInterceptor.java:65)
| 15:27:54,520 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 15:27:54,520 ERROR [STDERR] at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
| 15:27:54,520 ERROR [STDERR] at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
| 15:27:54,520 ERROR [STDERR] at
org.jboss.ejb3.mdb.MessagingContainer.localInvoke(MessagingContainer.java:245)
| 15:27:54,520 ERROR [STDERR] at
org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.delivery(MessageInflowLocalProxy.java:268)
| 15:27:54,521 ERROR [STDERR] at
org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.invoke(MessageInflowLocalProxy.java:138)
| 15:27:54,521 ERROR [STDERR] at $Proxy72.onMessage(Unknown Source)
| 15:27:54,521 ERROR [STDERR] at
org.jboss.resource.adapter.jms.inflow.JmsServerSession.onMessage(JmsServerSession.java:183)
| 15:27:54,521 ERROR [STDERR] at
org.jboss.mq.SpyMessageConsumer.sessionConsumerProcessMessage(SpyMessageConsumer.java:905)
| 15:27:54,521 ERROR [STDERR] at
org.jboss.mq.SpyMessageConsumer.addMessage(SpyMessageConsumer.java:170)
| 15:27:54,521 ERROR [STDERR] at org.jboss.mq.SpySession.run(SpySession.java:323)
| 15:27:54,521 ERROR [STDERR] at
org.jboss.resource.adapter.jms.inflow.JmsServerSession.run(JmsServerSession.java:249)
| 15:27:54,521 ERROR [STDERR] at
org.jboss.resource.work.WorkWrapper.execute(WorkWrapper.java:204)
| 15:27:54,522 ERROR [STDERR] at
org.jboss.util.threadpool.BasicTaskWrapper.run(BasicTaskWrapper.java:275)
| 15:27:54,522 ERROR [STDERR] at
EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:743)
| 15:27:54,522 ERROR [STDERR] at java.lang.Thread.run(Thread.java:595)
| 15:27:54,522 ERROR [STDERR] Caused by: org.jbpm.persistence.JbpmPersistenceException:
couldn't commit hibernate session
| 15:27:54,522 ERROR [STDERR] at
org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:172)
| 15:27:54,522 ERROR [STDERR] at org.jbpm.svc.Services.close(Services.java:211)
| 15:27:54,522 ERROR [STDERR] ... 32 more
| 15:27:54,522 ERROR [STDERR] Caused by: org.hibernate.TransientObjectException: object
references an unsaved transient instance - save the transient instance before flushing:
org.jbpm.graph.def.Action
| 15:27:54,523 ERROR [STDERR] at
org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:219)
| 15:27:54,523 ERROR [STDERR] at
org.hibernate.type.EntityType.getIdentifier(EntityType.java:108)
| 15:27:54,523 ERROR [STDERR] at
org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:242)
| 15:27:54,523 ERROR [STDERR] at
org.hibernate.type.TypeFactory.findDirty(TypeFactory.java:482)
| 15:27:54,523 ERROR [STDERR] at
org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.java:3056)
| 15:27:54,523 ERROR [STDERR] at
org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:474)
| 15:27:54,523 ERROR [STDERR] at
org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:197)
| 15:27:54,523 ERROR [STDERR] at
org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:120)
| 15:27:54,524 ERROR [STDERR] at
org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)
| 15:27:54,524 ERROR [STDERR] at
org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
| 15:27:54,524 ERROR [STDERR] at
org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
| 15:27:54,524 ERROR [STDERR] at
org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
| 15:27:54,524 ERROR [STDERR] at
org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
| 15:27:54,524 ERROR [STDERR] at
org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
| 15:27:54,524 ERROR [STDERR] at
org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:162)
| 15:27:54,524 ERROR [STDERR] ... 33 more
|
I'm probably making this way too complex. For just creating a timer with an empty
action... I've had an extensive look to the documentation and forum, but I obviously
missed the catch. Can anybody help me further with this please ?
The only thing I'm wanting to achieve is setting a timer with a dynamic duedate. If
sombody knows how I can modify the duedate of a timer mentioned in the process definition,
that would be just fine too...
I'm using JBPM 3.1.2, with the web app of the starter's kit, deployed on a JBoss
4.0.5GA application server. J2SE 1.5.
Many thanks for any clue !
Jan
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