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<a href="https://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
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jBPM 5.4, Persistence, and Safe-Points
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created by <a href="https://community.jboss.org/people/franco.gasperino">Franco Gasperino</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/825366#825366">View the full discussion</a>
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<div class="jive-rendered-content"><p>Community,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Excuse the long-winded post. I'm trying to debug an issue with an integration project with the following components:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><ul><li>jBPM 5.4 final, Drools 5.5 final</li><li>Spring 3.2.x</li><li>Bitronix 2.1.x</li></ul><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The core jBPM engine is heavily integrated with a custom stack allowing process instances to be created and run via all sorts of connectivity. The custom layer will take the process id & input parameters, delegate to a thread in an executor, which will:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><ol><li>Instantiate the drools environment (with JTA support).</li><li>Create the knowledge session.</li><li>Create a custom WorkItemHandler, associate each custom service task with this handler.</li><li>Create and associate the event handlers.</li><li>Create and start the process instance.</li></ol><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Everything executes as-expected, the JTA is performing commits and I can see the Hibernate activity inserting, updating, and deleting records from the Derby XA database.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>However, when testing a process instance which *should* trigger a safe-point, i see unexpected behavior. In this case:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><ul><li>Script "Hello" is a java/groovy/whatever script task.</li><li>ServiceTask "MockAsyncTask" is a java class, which is associated / registered with the custom WorkItemHandler. <ul><li>executeWorkItem() does NOT call completeWorkItem()</li><li>Returns control to the jBPM engine, which should trigger a safe-point.</li><li>Causes return of startProcessInstance(), which will exit the worker thread in the executor.</li></ul></li><li>Script "Bye" is a java/groovy/whatever script task.</li></ul><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The workflow: Start -> Hello -> MockAsyncTask -> Bye -> End</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>As expected, I see the behavior. I see that the ProcessInstance object associated has a state field of "2", which is active. Howevever, the hibernate update statements on the ProcessInstanceInfo table always have a state value of '0'. This is the breaking behavior.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When I attempt to call the adapter layer with the session id, process instance id, work item id, and a payload:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><ol><li>Instantiate the drools environment (JTA support).</li><li>Load the existing knowledge session.</li><li>Create a custom WorkItemHandler, associate each custom service task with this handler.</li><li>Create and associate event handlers.</li><li>Call completeWorkItem().</li></ol><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The workItem does complete, and i see it deleted from the WorkItemInfo table. However, since the process instance state has been reloaded with a value of '0', the "Bye" script task is never fired.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Any ideas? A full code dump would be huge, but I'm happy to inject some loggers if it would assist troubleshooting.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Franco</p></div>
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