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StatefulKnowledgeSession signalEvent method
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created by <a href="http://community.jboss.org/people/instanceof">Geoff Pole</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/627040#627040">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Can anyone help me to understand why the signalEvent method on the StatefulKnowledgeSession calls the ProcessInstancesWaitingForEvent query even when I provide the processInstanceId parameter?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The ProcessInstancesWaitingForEvent seems to retrieve all workflow instances that are awaititing a particular event.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I am seeing this behaviour in the context of this workflow:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><a href="http://community.jboss.org/servlet/JiveServlet/showImage/2-627040-16993/data-v.0.0.2.jpg"><span> http://community.jboss.org/servlet/JiveServlet/downloadImage/2-627040-16993/450-205/data-v.0.0.2.jpg </span></a></p><p>When I start the workflow with process variables that make it take the lower path the workflow begins and waits for the first signal.</p><p>        </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><table><tbody><tr><td style=";"><br/></td><td style=";"><br/></td><td style=";">ProcessInstance process = session.startProcess("com.bluecycle.zephyr.workflow.data-v0.0.2", processVariables);</td></tr></tbody></table><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>At this point I am able to signal the first event and the ProcessInstancesWaitingForEvent is NOT called. The workflow quickly moves and waits for the second signal.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><table><tbody><tr><td style=";"><br/></td><td style=";"><br/></td><td style=";">session.signalEvent("Signal1", null, process.getId());</td><td style=";"><br/></td></tr></tbody></table><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>At this point I can signal the second event which does succeed but this time it appeas to be calling the ProcessInstancesWaitingForEvent query to find all workflows waiting for the signal2 event..</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><table><tbody><tr><td style=";"><br/></td><td style=";"><br/></td><td style=";">session.signalEvent("Signal2", null, process.getId());</td><td style=";"><br/></td></tr></tbody></table><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The time that this takes is directly proportional to the number of workflow instances that I have waiting for the signal2 event.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Can anyone help me to understand why ProcessInstancesWaitingForEvent is being called? It seems like this is unnessercary given that I am providing the processInsnanceId. Also I'm not sure why this happens when I signal event 2, but not when I signal event 1.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The jbpm versions I have used are the ones bundled in the jbpm 5.10-Final installer download.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks very much,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Geoff</p></div>
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