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";

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();