topic Re: Create a generic fail event manager in Alfresco Archive

Create a generic fail event manager

sazzadul — Mon, 12 Sep 2011 15:23:17 GMT

Hi,I am trying to create a generic fail event manager by using boundary event but can't get it to work. What I would like to do is whenever my delegate class adds an execution variable say createActivityFailed then I would likethe boundary event to catch this error and create a user task say FEM.I h

Re: Create a generic fail event manager

jbarrez — Thu, 15 Sep 2011 13:05:32 GMT

One option is to put all the steps in an embedded subprocess with an error catch event, and fire this event from your Java classes.

Re: Create a generic fail event manager

sazzadul — Mon, 19 Sep 2011 08:31:59 GMT

Thanks for your input and I am doing just the way you described, but the problem is whenever a servicetask(say the second one) fails I create a usertask so that I can re run the service task again and for that there has to be a sequence flow to all the service tasks which makes the diagram a bit messig and I would love to avoid that if possible because we can potetially have a lot more service tasks(20 to 30).

Do you know of a better solution to this ?

public class OrchestrateDelegate implements ActivityBehavior {
 private static Map<String, String> transitions = new HashMap<String, String>();

 static {
  transitions.put("Klargjor-og-kjor-opphor", "flow10");
  transitions.put("Sende-brev", "flow22");
  transitions.put("Sende-regnskap", "flow23");
 }
 
 @Override
 public void execute(ActivityExecution execution) throws Exception {
  String wpsTaskId = (String)execution.getVariable("wpsTaskId");
  
  PvmTransition transition = execution.getActivity().findOutgoingTransition(transitions.get(wpsTaskId));
  execution.take(transition);
 }
}

Re: Create a generic fail event manager

jbarrez — Tue, 20 Sep 2011 12:40:51 GMT

mmm, i see indeed the problem. Not very pretty, indeed.

Well, you *could* do it without having the sequence flow, but it requires some serious low level (implementation level) code to get it going.
Best is to check what happens when calling the take() method (but it will be very low-level….)

Another 'hack' which you might do, is to have a pre-processing of your process xml file, and enhance the process with all the sequence flow … but obvious that's not the pretiest of solutions.

Re: Create a generic fail event manager

sazzadul — Wed, 21 Sep 2011 06:34:13 GMT

I would rather not prefer to do low level so my question is since this problem scenario is very authentic and other activiti users might very well run into same problem,
will you consider make a fix for it in activiti so that we will be able to jump to a specefic service task without defining a flow ?