[jboss-user] [jBPM Users] - Re: sub process event propagation

[aapthorp]

So my final (JBPM 3) solution for this requirement is as follows.

An actionhandler in the subprocess which propagates the event to the superprocess.

public void execute(ExecutionContext executionContext) throws Exception {
  | 
  |     if (eventType == null) {
  |       eventType = executionContext.getEvent().getEventType();
  |     }
  |     Token superToken = executionContext.getProcessInstance()
  |         .getSuperProcessToken();
  |     ExecutionContext superContext = new ExecutionContext(superToken);
  |     superToken.getProcessInstance().getProcessDefinition().fireEvent(eventType, superContext);
  | }

and another action handler to handle the propogated event in the superprocess:

 
  | 
  | String nodeName=null;
  | String transitionName=null;
  | 
  | public void execute(ExecutionContext executionContext) throws Exception {
  | 
  |   List tokenList = executionContext.getProcessInstance().findAllTokens();
  |   for (Iterator it = tokenList.iterator(); it.hasNext();) {
  |       Token token = (Token) it.next();
  |       if (token.getNode().getName().equals(nodeName)) {
  |         token.signal(transitionName);
  |      }
  |   }
  | }

The propagated event can then be sent to a state that transitions to a join to control the main flow of the superprocess. I'm sure there are some other ways of getting the same effect but this seems to work quite well. I have also refined it further to consolidate events of the same type from multiple instances of the same subprocess.

Now need to see how this is achieved in JBPM4.

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