Get the node name of a task

[prap89]

Hello folks,

I am new to Activiti and I currently building a sample application that needs me to get the service task id and its name from its properties as the process runs in the workflow. Currently I just want to print the service task name and its id.
I looked in the forums and it seems you need a runtimeservice object to get the task id but when in delegate listener I could not get access to runtimeservice object of the current process. RunTimeService object is only available in the main thread.
Can you tell me a way around this problem?

Thank you,

[franklin]

Hi prap89,

Try to do this inside your delegate

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
RuntimeService runtimeService = processEngine.getRuntimeService();

Than, you can find whatever you want with the process.


// you must call this code before the workflow reach your delegate.
ProcessEngines.init();


Best regards,

Franklin

[prap89]

i tried it but it does not work. I get exception

What I did was:
1. Created service task and bind it with a class that implements Java Delegate
2. Followed the procedure you mentioned.

My service handler code:

public class ServiceHandle implements JavaDelegate {

@Override
public void execute(DelegateExecution execution) throws Exception {
 
  ProcessEngine processEngine =  ProcessEngines.getDefaultProcessEngine();
  RuntimeService runtimeService = processEngine.getRuntimeService();

  System.out.println("Event Name 1: "+ runtimeService.getActiveActivityIds(execution.getId()));
}
}


SEVERE: Error while closing command context
org.activiti.engine.ActivitiException: execution 21614 doesn't exist
at org.activiti.engine.impl.cmd.FindActiveActivityIdsCmd.execute(FindActiveActivityIdsCmd.java:45)
at org.activiti.engine.impl.cmd.FindActiveActivityIdsCmd.execute(FindActiveActivityIdsCmd.java:27)
at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:42)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
at org.activiti.engine.impl.RuntimeServiceImpl.getActiveActivityIds(RuntimeServiceImpl.java:139)
at sample.ServiceHandle.execute(ServiceHandle.java:39)
at org.activiti.engine.impl.bpmn.behavior.ServiceTaskJavaDelegateActivityBehavior.execute(ServiceTaskJavaDelegateActivityBehavior.java:47)
at org.activiti.engine.impl.bpmn.behavior.ServiceTaskJavaDelegateActivityBehavior.execute(ServiceTaskJavaDelegateActivityBehavior.java:38)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.execute(ClassDelegate.java:104)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:40)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:48)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:52)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:45)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicOperationTransitionCreateScope.java:44)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(AtomicOperationTransitionNotifyListenerTake.java:61)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(AtomicOperationTransitionDestroyScope.java:111)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:36)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:52)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:326)
at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:92)
at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:49)
at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44)
at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.execute(FlowNodeActivityBehavior.java:36)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:40)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStartInitial.eventNotificationsCompleted(AtomicOperationProcessStartInitial.java:44)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:52)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStart.eventNotificationsCompleted(AtomicOperationProcessStart.java:44)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:52)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:280)
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:70)
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:30)
at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:42)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceByKey(RuntimeServiceImpl.java:49)
at sample.MainClass.main(MainClass.java:50)
Aug 4, 2011 2:34:56 PM org.activiti.engine.impl.interceptor.CommandContext close
SEVERE: Error while closing command context
org.activiti.engine.ActivitiException: execution 21614 doesn't exist
at org.activiti.engine.impl.cmd.FindActiveActivityIdsCmd.execute(FindActiveActivityIdsCmd.java:45)
at org.activiti.engine.impl.cmd.FindActiveActivityIdsCmd.execute(FindActiveActivityIdsCmd.java:27)
at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:42)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
at org.activiti.engine.impl.RuntimeServiceImpl.getActiveActivityIds(RuntimeServiceImpl.java:139)
at sample.ServiceHandle.execute(ServiceHandle.java:39)
at org.activiti.engine.impl.bpmn.behavior.ServiceTaskJavaDelegateActivityBehavior.execute(ServiceTaskJavaDelegateActivityBehavior.java:47)
at org.activiti.engine.impl.bpmn.behavior.ServiceTaskJavaDelegateActivityBehavior.execute(ServiceTaskJavaDelegateActivityBehavior.java:38)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.execute(ClassDelegate.java:104)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:40)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:48)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:52)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:45)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicOperationTransitionCreateScope.java:44)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(AtomicOperationTransitionNotifyListenerTake.java:61)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(AtomicOperationTransitionDestroyScope.java:111)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:36)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:52)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:326)
at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:92)
at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:49)
at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44)
at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.execute(FlowNodeActivityBehavior.java:36)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:40)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStartInitial.eventNotificationsCompleted(AtomicOperationProcessStartInitial.java:44)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:52)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStart.eventNotificationsCompleted(AtomicOperationProcessStart.java:44)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:52)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:481)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:280)
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:70)
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:30)
at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:42)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceByKey(RuntimeServiceImpl.java:49)
at sample.MainClass.main(MainClass.java:50)
ERROR: execution 21614 doesn't exist


[jbarrez]

Calling the services from within a java delegate is not going to work (it might, sometimes, but then thats pure luck).

Check the operations available on the execution object.

[prap89]

execution object does not have anything related to taskname or taskid.
Can you throw some light on it?

[jbarrez]

Instead of using the JavaDelegate, switch to the ActivityBehavior approach.

There, you get an ActivitiExecution, on which you can call getActivity().