Are there hooks within activiti engine?

[markusfaeth]

Hello, I would like to do something like this: For every user task you create call my custom method (1).

Actually I could write additional code in our logic at two points to almost accomplish this: After creating a new process instance, look if the execution was stopped by a user task. And after completing a user task, do the same. But this only works from within our logic, so timer started process instances won't be handled by this (2).

So, are there hooks to do something like (1), or is there a general way to handle the special case of timer started process instances (2)?

Thank you!

[gant]

Hi,

You can use TaskListeners http://activiti.org/userguide/#taskListeners. I would use this, if you want to control (define) at design time of the process model, what code should be executed at runtime.

If it's always the same code, that shoud be run, you could have a look at pre- and post parse listeners. You'll find information on them in this forum.

Regards,
michael

[markusfaeth]

Thank you! 

This sounds promising, i'll check that!  :geek:

[markusfaeth]

BpmnParseListeners are perfect for this purpose. Thanks again! 

Here is some of the code for all others who want to do this:


public class ParseListener implements BpmnParseListener {
public void parseUserTask(Element userTaskElement, ScopeImpl scope, ActivityImpl activity) {
  UserTaskActivityBehavior utab = (UserTaskActivityBehavior)activity.getActivityBehavior();
  utab.getTaskDefinition().addTaskListener("create", new CommonUserTaskCreateListener());
}
// other method implementations, all empty…
}

CommonUserTaskCreateListener is actually creating messages (portal internal message system) for portal users getting informed that a new task is available…