topic Signal Boundary Event in Alfresco Archive

Signal Boundary Event

Thu, 24 May 2012 01:58:52 GMT

Hi All,I'm using Activiti 5.9 and either I've misunderstood how a Signal Boundary Event works, or they don't seem to be working.This is the test process I've put together:[img]http://i.imgur.com/8UIeJ.jpg[/img]When a process starts the execution arrives at "Receive Task" and waits for it's signal. I

Re: Signal Boundary Event

jcavezian — Thu, 24 May 2012 08:46:02 GMT

Hello Nick,

maybe I'm wrong, but as you didnot mention it,
did you declare the signal itself ?

User guide says here : "The attribute signalRef references a signal element declared as a child element of the definitions root element."

<definitions… >
        <!– declaration of the signal –>
        <signal id="TheSignal" name="The signal" />

Hope this helps, regards,
Jérôme

Re: Signal Boundary Event

Thu, 24 May 2012 09:35:58 GMT

Hi Jerome,

Thanks for the reply. The signal is declared as you mentioned. That's what I meant by:

and "TheSignal" is defined at the top level definitions

Apologies for any confusion.

Thanks,
Nick

Re: Signal Boundary Event

jayehsea — Thu, 24 May 2012 22:48:41 GMT

I am having the same issue. I am getting an ActivitiException with the message "Execution '18812' has not subscribed to a signal event with name 'MySignal'."

The line of code leading to this exception is:

runtimeService.signalEventReceived("MySignal", exec.getId());

My process definition contains:


<definitions xmlns=…">

    <signal id="MySignal" name="My Signal" />
    
  <process id="VaultingMonitorAndFollowup" name="Vaulting Monitor And Follow Up">
    <startEvent id="startevent1" name="Start" activiti:initiator="initiator"></startEvent>
    <userTask id="waitForCertificate" name="Certificate Monitor Task" activiti:candidateGroups="accountancy"></userTask>
    <boundaryEvent id="vaultEscalationTimer" cancelActivity="true" attachedToRef="waitForCertificate">
      <timerEventDefinition>
        <timeDuration>${vaultDuration}</timeDuration>
      </timerEventDefinition>
    </boundaryEvent>
 <boundaryEvent id="boundaryCancelSignal" attachedToRef="waitForCertificate" cancelActivity="true">
  <signalEventDefinition signalRef="MySignal" />
 </boundaryEvent>
…
…

I have not been able to find any other documentation saying how a process or task should "subscribe" to a signal. I look forward to learning how to do this.

Thanks.
Jim

Re: Signal Boundary Event

trademak — Fri, 25 May 2012 15:36:21 GMT

Hi,

There are a couple of things to pay attention to when using the signal event functionality.
First when you want to use the runtimeService.signalEventReceived method you should pass-in the signal name and not the id.
So when you have the following signal definition:

<signal id="testSignal" name="Test signal"/>
You should use Test signal in the runtimeService.signalEventReceived method.
When you want to use the runtimeService.signalEventReceived method with the execution id parameter you should make sure that this is the execution id of the signal.
You can query the runtimeService to get this signal execution like this:

Execution execution = runtimeService.createExecutionQuery().signalEventSubscription("Test signal").singleResult();
Again make sure that you use the signal name.
Hope this helps you to get your example working.

Best regards,

Re: Signal Boundary Event

Mon, 28 May 2012 02:41:17 GMT

Hi Tijs,

That was the problem, I was using the signal ID instead of the name. Thanks for the assistance

Cheers,
Nick

Re: Signal Boundary Event

venkatesh — Wed, 23 Mar 2016 12:15:09 GMT

Hi,

I am pretty new to activiti. So, Practicing some test cases for easy understanding. Can Any One help me with the sample bpmn & Junit test file for : Signal Catch & Throw. Further explanation about the concept would be usefull as well.
Thanks in advance.

Re: Signal Boundary Event

martin_grofcik — Wed, 23 Mar 2016 20:05:51 GMT

Hi,

download activiti source
go to org.activiti.engine.test.bpmn.event.signal.SignalEventTest

Regards
Martin

Re: Signal Boundary Event

venkatesh — Thu, 24 Mar 2016 09:25:48 GMT

Hi martin,

Thank You so much for the help.

Regards,
Venkatesh.