Answers to: Trigger activity - no task

Comment by Reguel Wermelinger on lttung's answer

Reguel Wermelinger — Wed, 01 Mar 2017 09:07:47 -0500

In classical workflows you need a traceable history and therefore always need to know the creator task. But I guess you should be able to create a completely detached task/case if you create it via a REST or SOAP webservice. For a REST example see the ConnectivityDemos -> com.axonivy.connectivity.rest.provider.ApprovalService

Answer by lttung

lttung — Tue, 28 Feb 2017 10:07:47 -0500

Scenario
- Process A has a HTML dialog
- Process B has a task switch
- If user click a button in HTML dialog, it will trigger process B. => 1 case of process A and 1 case of process B is created. We do not need the case of process A.
How can we implement without creating the case of process A.

I follow the guideline of Reguel, inside the callable process I have a task switch. It leads to the error like this:

Caused by: java.lang.IllegalStateException: TaskSwitch element (Role Approval <15A82F10A6717E03-U60-f28>) is not permitted inside a sub process that was invoked from a User Dialog process.
 at ch.ivyteam.ivy.bpm.engine.internal.model.bpmn.TaskSwitchElementExecutorAdapter.checkIllegalTaskSwitchUsage(TaskSwitchElementExecutorAdapter.java:105)
 at 
ch.ivyteam.ivy.bpm.engine.internal.model.bpmn.TaskSwitchElementExecutorAdapter.execute(TaskSwitchElementExecutorAdapter.java:81)
     at ch.ivyteam.ivy.bpm.engine.internal.model.ProcessElement.lambda$0(ProcessElement.java:215)
     at ch.ivyteam.ivy.bpm.engine.internal.model.ProcessElement.executeInElementContext(ProcessElement.java:286)

 at ch.ivyteam.ivy.bpm.engine.internal.model.ProcessElement.execute(ProcessElement.java:215)
 at ch.ivyteam.ivy.bpm.engine.internal.core.ProcessElementExecution.execute(ProcessElementExecution.java:37)

Is there a way to trigger another business process (by using Trigger, Signals, Callable sub,...) from a HTML dialog without persisting the ICase of the current business process?

Thanks and regards,
Tung

Comment by Stelt0 on Reguel Wermelinger's answer

Stelt0 — Thu, 21 Jul 2016 10:08:08 -0400

currently it is Async, but if we decide to make it Sync, I would rather change the process type, as you suggested.

Comment by Reguel Wermelinger on Reguel Wermelinger's answer

Reguel Wermelinger — Thu, 21 Jul 2016 10:04:24 -0400

As long as you do not require a return value from the called process this is also a good solution. Or do you send the result back as signal?

Comment by Stelt0 on Reguel Wermelinger's answer

Stelt0 — Thu, 21 Jul 2016 09:07:03 -0400

But what if I set the responsible Role to SYSTEM ?

As a workaround we called process via Ivy Script and Signals so that we did not changed the project type.

Answer by Reguel Wermelinger

Reguel Wermelinger — Thu, 21 Jul 2016 08:51:39 -0400

If you don't want a task and an asynchronous execution then a Callable Sub Process could do the job better. Just put your target process logic in BPM process of kind 'Callable Sub Process' and invoke it from the Html Dialog by using the (Subprocess) 'Call' Activity.