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jbpm process variable - Classcastexception/ classloader issues
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created by <a href="http://community.jboss.org/people/mahavirj">Mahavir Jain</a> in <i>jBPM Development</i> - <a href="http://community.jboss.org/message/572147#572147">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p>I am able to start a jbpm4.4 process from a servlet by passing a process variable (com.process.servicedata.Plan).  However, a decision handler later in the process gets a classcast exception when accessing this variable:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left">java.lang.ClassCastException</p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left"><span style="font-size: 10pt;">: com.process.servicedata.Plan cannot be cast to com.process.servicedata.Plan</span></p><p align="left">at com.process.activitymodel.HealthPlanDecisionHandler.decide(</p><p align="left"><span style="text-decoration: underline;"><span style="color: #000080; font-size: 10pt; ">HealthPlanDecisionHandler.java:15</span><span style="font-size: 10pt;">)</span></span></p><p align="left">at org.jbpm.jpdl.internal.activity.DecisionHandlerActivity.execute(</p><p align="left"><span style="text-decoration: underline;"><span style="color: #000080; font-size: 10pt; ">DecisionHandlerActivity.java:60</span><span style="font-size: 10pt;">)</span></span></p><p align="left">at org.jbpm.jpdl.internal.activity.DecisionHandlerActivity.execute(</p><p align="left"><span style="text-decoration: underline;"><span style="color: #000080; font-size: 10pt; ">DecisionHandlerActivity.java:42</span><span style="font-size: 10pt;">)</span></span></p><p align="left">at org.jbpm.pvm.internal.model.op.ExecuteActivity.perform(</p><p align="left"><span style="text-decoration: underline;"><span style="color: #000080; font-size: 10pt; ">ExecuteActivity.java:60</span><span style="font-size: 10pt;">)</span></span></p><p align="left">at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(</p><p align="left"><span style="text-decoration: underline;"><span style="color: #000080; font-size: 10pt; ">ExecutionImpl.java:672</span><span style="font-size: 10pt;">)</span></span></p><p align="left">at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(</p><p align="left"><span style="text-decoration: underline;"><span style="color: #000080; font-size: 10pt; ">ExecutionImpl.java:632</span><span style="font-size: 10pt;">)</span></span></p><p>at org.jbpm.pvm.internal.model.op.TransitionEndActivity.perform(</p><p><span style="text-decoration: underline;"><span style="color: #000080; font-size: 10pt; ">TransitionEndActivity.java:56</span><span style="font-size: 10pt;">)</span></span></p><br/><br/><span> </span><br/><br/><span> </span><br/><br/><span> </span><br/><br/><span> </span><br/><br/><span> </span><br/><br/><span> </span><br/><br/><span> </span><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left">This appears to be a classloader problem, so here are the details on my project structure:</p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><ol start="1"><li>process-web.war contains the servlet that starts the process.<br/></li></ol><span> </span><ol start="1"><li>process.jpdl.xml is in process.jar<br/></li><li>process.jar is in WEB-INF/lib of process-web.war. <br/></li><li>all the jbpm libraries (e.g. jbpm.jar) are in the WEB-INF/lib. <br/></li><li>process.jpdl.xml in process.jar is deployed using an Ant script that was taken from the examples app that comes with jbpm. <br/></li><li>process-web.war is deployed to jboss 5 and uses jbpm 4.4.<br/></li></ol><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left">Any clues on what am I missing?</p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left"><span style=": ; font-size: 2; font-color: #000080; ">Thanks,</span></p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p align="left" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><br/><br/></div>
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