[jboss-user] [jBPM] - Is there any standard implementation for a local-JVM Task Service

Sam D. do-not-reply at jboss.com
Sun Aug 14 11:58:59 EDT 2011


Sam D. [http://community.jboss.org/people/a.d.jbpm] created the discussion

"Is there any standard implementation for a local-JVM Task Service"

To view the discussion, visit: http://community.jboss.org/message/620971#620971

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I tried to adapt the the +WSHumanTaskHandler+ to a +LocalHumanTaskHandler+. But when executing +taskSession.taskOperation(Operation.Complete, task.getId(), "krisv", null, null, null),+ it throws following exception:

java.lang.NullPointerException
    at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.internalExecuteWorkItem(JPAWorkItemManager.java:43)
    at org.jbpm.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:105)
    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122)
    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:185)
    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:150)
    at org.jbpm.workflow.instance.node.SplitInstance.internalTrigger(SplitInstance.java:61)
    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122)
    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:185)
    at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:150)
    at org.jbpm.workflow.instance.impl.ExtendedNodeInstanceImpl.triggerCompleted(ExtendedNodeInstanceImpl.java:47)
    at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:162)
    at org.jbpm.workflow.instance.node.StateBasedNodeInstance.triggerCompleted(StateBasedNodeInstance.java:143)
    at org.jbpm.workflow.instance.node.WorkItemNodeInstance.triggerCompleted(WorkItemNodeInstance.java:239)
    at org.jbpm.workflow.instance.node.HumanTaskNodeInstance.triggerCompleted(HumanTaskNodeInstance.java:90)
    at org.jbpm.workflow.instance.node.WorkItemNodeInstance.workItemCompleted(WorkItemNodeInstance.java:301)
    at org.jbpm.workflow.instance.node.WorkItemNodeInstance.signalEvent(WorkItemNodeInstance.java:277)
    at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:333)
    at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.completeWorkItem(JPAWorkItemManager.java:119)
    at org.jbpm.examples.evaluation.LocalHumanTaskHandler$TaskEventHandler.taskCompleted(LocalHumanTaskHandler.java:330)
    at org.jbpm.task.event.TaskEventSupport.fireTaskCompleted(TaskEventSupport.java:47)
    at org.jbpm.task.service.TaskServiceSession.taskCompleteOperation(TaskServiceSession.java:402)
    at org.jbpm.task.service.TaskServiceSession.taskOperation(TaskServiceSession.java:352)
    at org.jbpm.examples.evaluation.PersistentProcessExample.main(PersistentProcessExample.java:97)

Attached you can find my LocalHumanTaskHandler.java and PersistentProcessExample.java (main).
FYI, when I use instead of a +JPAKnowledgeService.newStatefulKnowledgeSession( kbase, null, env )+ a +kbase.newStatefulKnowledgeSession()+ (non-JPA), it works fine.
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