topic Re: Call custom java code to decide which sequence flow is taken next in Alfresco Archive

Call custom java code to decide which sequence flow is taken next

sushantmahajan — Fri, 22 Aug 2014 07:33:16 GMT

Hi All,Is there a provision in activiti to call custom java code to evaluate the transition for a gateway. I want to call a java method that decides and returns which transition has to be taken next. I had a similar usecase earlier with JBPM, where decision handler did it for me.

Re: Call custom java code to decide which sequence flow is taken next

cocojack42 — Mon, 25 Aug 2014 05:35:46 GMT

Does this help you: http://forums.activiti.org/content/catch-java-servicetask-exceptions-using-erroreventdefinition

<java>
public class ThrowsExceptionBehavior implements ActivityBehavior {

public void execute(ActivityExecution execution) throws Exception {
    String var = (String) execution.getVariable("var");

    PvmTransition transition = null;
    try {
      executeLogic(var);
      transition = execution.getActivity().findOutgoingTransition("no-exception");
    } catch (Exception e) {
      transition = execution.getActivity().findOutgoingTransition("exception");
    }
    execution.take(transition);
}

}
</java>

Re: Call custom java code to decide which sequence flow is taken next

martin_grofcik — Mon, 25 Aug 2014 05:45:57 GMT

Hi,

You can use spring beans or expressions.
(org.activiti.engine.test.bpmn.gateway.ExclusiveGatewayTest).

Regards
Martin