[jboss-user] [jBPM] New message: "Re: How a pass signal from state a task or java?? I do not under"

[Andy Barreras]

User development,

A new message was posted in the thread "How a pass signal from state a task or java?? I do not under":

http://community.jboss.org/message/520343#520343

Author  : Andy Barreras
Profile : http://community.jboss.org/people/FlyNavy

Message:
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I was having the same issue.  I believe that the reason was that I was calling a listener on the wrong state event:
 
   <state g="137,123,150,52" name="Generate Visibilities">
        <on event="start">
        <event-listener class="com.boeing.ids.sogs.gmpwf.listeners.VisibilityListener" />
        </on>
      <transition g="-143,-10" name="to Check Out Time Segment" to="Check Out Time Segment"/>
      <transition name="to cancel" to="cancel" g="-48,-18"/>
      <transition name="to error" to="error" g="-42,-18"/>
   </state>
 
Within the listener, I was doing some external work then calling the executionService.signalExecutionById()method.  I think the reason it was failing was because I was calling this method within the state's start event.  In jBPM, you can't trigger a transition to another state until the (current) state execution stops.  When I changed the jpdl code to call the listener on the state's end event, the exception went away: 
 
   <state g="137,123,150,52" name="Generate Visibilities">
         <on event="end">
         <event-listener class="com.boeing.ids.sogs.gmpwf.listeners.VisibilityListener" />
         </on>
       <transition g="-143,-10" name="to Check Out Time Segment" to="Check Out Time Segment"/>
       <transition name="to cancel" to="cancel" g="-48,-18"/>
       <transition name="to error" to="error" g="-42,-18"/>
    </state>
 
Hope this helps.

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