3 Replies Latest reply on Jul 2, 2009 5:24 AM by xuhuisheng

How can I suspend or resume a ProcessInstance in jBPM4?

xuhuisheng Jul 2, 2009 12:36 AM

Hi All:

I have a big problem when suspending/resuming a ProcessInstance in jBPM4.
A few days ago, I saw there are some feature for Suspending/Resume Execution in jBPM4. So I add this feature to the todolist of my project. But when I start work on this part, I find there is no method in api package to support these feature.

First I think suspend/resume is similar with the end/delete operation in the ExecutionService.java, but there is no such method. So I go to the Execution.java, Fortunately, there are some code for the suspend:

/** indicates that this execution is temporary suspended with the
* {@link #suspend()} method. Human tasks of a suspended execution
* shouldn't show up in people's task list and timers of suspended
* executions shouldn't fire and the execution is locked. Make sure that comparisons are
* done with .equals and not with '==' because if executions are
* loaded from persistent storage, a new string is created instead
* of the constants. */
String STATE_SUSPENDED = "suspended";

/** is this execution suspended ? */
boolean isSuspended();

But these are just a constants for the suspended state and a method for obtain the condition of the execution. I see there is some javadoc for {@link #suspend()}, it seems there may be a method named suspend in the Execution.java. But I can find any method like that.

Finally I can only to use ExecutionImpl.java in pvm to complete the suspend() and resume() operation. I think there is totally wrong.

/**
* FIXME: It is wrong to use implement class.
*/
((ExecutionImpl) pi).suspend();

/**
* FIXME: It is wrong to use implement class.
*/
((ExecutionImpl) pi).resume();

Anyone has better solution for this? Thank you very much.

1. Re: How can I suspend or resume a ProcessInstance in jBPM4?

dhanushgopinath Jul 2, 2009 12:52 AM (in response to xuhuisheng)

I am not much sure about jBPM 4, but in jBPM 3 code I am using. I can suspend and resume a process by using the following API's on ProcessInstance Class

org.jbpm.graph.exe.ProcessInstance
public void suspend()

 suspends this execution. This will make sure that tasks, timers and messages related to this process instance will not show up in database queries.

public void resume()

 resumes a suspended execution. All timers that have been suspended might fire if the duedate has been passed. If an admin resumes a process instance, the option should be offered to update, remove and create the timers and messages related to this process instance.

2. Re: How can I suspend or resume a ProcessInstance in jBPM4?

rams.rapol Jul 2, 2009 4:09 AM (in response to xuhuisheng)
how about following API

executionService.endProcessInstance(...)?
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3. Re: How can I suspend or resume a ProcessInstance in jBPM4?

xuhuisheng Jul 2, 2009 5:24 AM (in response to xuhuisheng)

If I useexecutionService.endProcessInstance(id, Execution.STATE_SUSPENDED), there will occur an Exception:

"invalid end state: suspended"

I think we need find another way.
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