[jboss-user] [jBPM] - Re: java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWrapper
kifayath khan
do-not-reply at jboss.com
Fri Aug 31 10:31:16 EDT 2012
kifayath khan [https://community.jboss.org/people/kifayath] created the discussion
"Re: java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWrapper"
To view the discussion, visit: https://community.jboss.org/message/757289#757289
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I am also getting same error , i am putting my code and error. Please help me
> package com.sample;
>
>
> import java.util.HashMap;
> import java.util.Map;
>
>
> import org.drools.KnowledgeBase;
> import org.drools.builder.KnowledgeBuilder;
> import org.drools.builder.KnowledgeBuilderFactory;
> import org.drools.builder.ResourceType;
> import org.drools.io.ResourceFactory;
> import org.drools.logger.KnowledgeRuntimeLogger;
> import org.drools.logger.KnowledgeRuntimeLoggerFactory;
> import org.drools.runtime.StatefulKnowledgeSession;
> import org.jbpm.process.workitem.wsht.HornetQHTWorkItemHandler;
>
>
> /**
> * This is a sample file to launch a process.
> */
> public class ProcessTest {
>
>
> public static final void main(String[] args) {
> try {
> // load up the knowledge base
> KnowledgeBase kbase = readKnowledgeBase();
> StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
> KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newThreadedFileLogger(ksession, "test", 1000);
> // start a new process instance
> Map<String, Object> params = new HashMap<String, Object>();
> params.put("employee", "krisv");
> params.put("reason", "Yearly performance evaluation");
> ksession.startProcess("com.sample.evaluation", params);
> System.out.println("Process started ...");
> logger.close();
> } catch (Throwable t) {
> t.printStackTrace();
> }
> }
>
>
> private static KnowledgeBase readKnowledgeBase() throws Exception {
> KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
> kbuilder.add(ResourceFactory.newClassPathResource("Evaluation.bpmn"), ResourceType.BPMN2);
> return kbuilder.newKnowledgeBase();
> }
>
> private static StatefulKnowledgeSession createKnowledgeSession(KnowledgeBase kbase) {
> StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
> HornetQHTWorkItemHandler humanTaskHandler = new HornetQHTWorkItemHandler(ksession);
> humanTaskHandler.setIpAddress("127.0.0.1");
> humanTaskHandler.setPort(5445);
> ksession.getWorkItemManager().registerWorkItemHandler("Human Task", humanTaskHandler);
> return ksession;
> }
>
>
>
> }
>
When I ran the code above, the first task executed fine, but the second task gives me:
java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWrapper
> Process started ...
> Exception in thread "Thread-3" java.lang.ClassCastException: java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWrapper
> at org.jbpm.task.utils.ContentMarshallerHelper.unmarshall(ContentMarshallerHelper.java:157)
> at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.handleCompletedTask(GenericHTWorkItemHandler.java:208)
> at org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler$1.run(GenericHTWorkItemHandler.java:187)
> at java.lang.Thread.run(Thread.java:722)
>
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