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Subject: [jboss-user] [jBPM] - Re: java.lang.String cannot be cast to org.jbpm.task.utils.MarshalledContentWr
From: kifayath khan <do-not-reply () jboss ! com>
Date: 2012-08-31 14:31:16
Message-ID: 2-740612-3-102416-1339140622178-2-757289-3-109128-1346423465453.jivesbs.jivemailuser () https://community ! jboss ! org
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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
--------------------------------------------------------------
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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-webkit-border-bottom-left-radius: 5px;"><h3 style="margin: 10px 0 5px; font-size: \
17px; font-weight: normal;"> Re: java.lang.String cannot be cast to \
org.jbpm.task.utils.MarshalledContentWrapper </h3>
<span style="margin-bottom: 10px;">
created by <a href="https://community.jboss.org/people/kifayath">kifayath \
khan</a> in <i>jBPM</i> - <a \
href="https://community.jboss.org/message/757289#757289">View the full discussion</a> \
</span> <hr style="margin: 20px 0; border: none; background-color: #dadada; height: \
1px;">
<div class="jive-rendered-content"><p>I am also getting same error , i am putting my \
code and error. Please help me</p><p style="min-height: 8pt; height: 8pt; padding: \
0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: \
0px;"> </p><blockquote class="jive-quote"><p>package com.sample;</p><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: \
8pt; height: 8pt; padding: 0px;"> </p><p>import java.util.HashMap;</p><p>import \
java.util.Map;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import \
org.drools.KnowledgeBase;</p><p>import \
org.drools.builder.KnowledgeBuilder;</p><p>import \
org.drools.builder.KnowledgeBuilderFactory;</p><p>import \
org.drools.builder.ResourceType;</p><p>import \
org.drools.io.ResourceFactory;</p><p>import \
org.drools.logger.KnowledgeRuntimeLogger;</p><p>import \
org.drools.logger.KnowledgeRuntimeLoggerFactory;</p><p>import \
org.drools.runtime.StatefulKnowledgeSession;</p><p>import \
org.jbpm.process.workitem.wsht.HornetQHTWorkItemHandler;</p><p style="min-height: \
8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; \
padding: 0px;"> </p><p>/**</p><p> * This is a sample file to launch a \
process.</p><p> */</p><p>public class ProcessTest {</p><p style="min-height: 8pt; \
height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; \
padding: 0px;"> </p><p>     \
     public static final void main(String[] args) \
{</p><p>          \
          try \
{</p><p>               \
               // \
load up the knowledge \
base</p><p>               \
               KnowledgeBase \
kbase = readKnowledgeBase();</p><p>               \
               StatefulKnowledgeSession \
ksession = createKnowledgeSession(kbase);</p><p>               \
               KnowledgeRuntimeLogger \
logger = KnowledgeRuntimeLoggerFactory.newThreadedFileLogger(ksession, "test", \
1000);</p><p>               \
               // \
start a new process instance</p><p>               \
               Map<String, \
Object> params = new HashMap<String, \
Object>();</p><p>               \
               params.put("employee", \
"krisv");</p><p>               \
               params.put("reason", \
"Yearly performance evaluation");</p><p>               \
               ksession.startProcess("com.sample.evaluation", \
params);</p><p>               \
               System.out.println("Process \
started ...");</p><p>               \
               logger.close();</p><p>          \
          } catch (Throwable t) \
{</p><p>               \
              &# \
160;t.printStackTrace();</p><p>          \
          }</p><p>     \
     }</p><p style="min-height: 8pt; height: 8pt; padding: \
0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: \
0px;"> </p><p>          private \
static KnowledgeBase readKnowledgeBase() throws Exception \
{</p><p>          \
          KnowledgeBuilder kbuilder \
= KnowledgeBuilderFactory.newKnowledgeBuilder();</p><p>          \
          kbuilder.add(ResourceFactory.newClassPathResource("Evaluation.bpmn"), \
ResourceType.BPMN2);</p><p>          \
          return \
kbuilder.newKnowledgeBase();</p><p>     \
     }</p><p>  </p><p>     \
     private static StatefulKnowledgeSession \
createKnowledgeSession(KnowledgeBase kbase) \
{</p><p>          \
          StatefulKnowledgeSession \
ksession = kbase.newStatefulKnowledgeSession();</p><p>          \
          HornetQHTWorkItemHandler \
humanTaskHandler = new \
HornetQHTWorkItemHandler(ksession);</p><p>          \
          humanTaskHandler.setIpAddress("127.0.0.1");</p><p>          \
          humanTaskHandler.setPort(5445);</p><p>          \
          ksession.getWorkItemManager().registerWorkItemHandler("Human \
Task", humanTaskHandler);</p><p>          \
          return \
ksession;</p><p>          }</p><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: \
8pt; height: 8pt; padding: 0px;"> </p><p>  </p><p>}</p><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></blockquote><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p \
style="background-color: #eef4f9; font-size: 12px; color: #555555; font-family: \
'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, Arial, Helvetica, \
sans-serif;">When I ran the code above, the first task executed fine, but the second \
task gives me:</p><p style="background-color: #eef4f9; font-size: 12px; color: \
#555555; font-family: 'Lucida Sans', 'Lucida Sans Unicode', 'Lucida Grande', Verdana, \
Arial, Helvetica, sans-serif;">     java.lang.String cannot be \
cast to org.jbpm.task.utils.MarshalledContentWrapper</p><p style="min-height: 8pt; \
height: 8pt; padding: 0px;"> </p><blockquote class="jive-quote"><p>Process \
started ...</p><p>Exception in thread "Thread-3" java.lang.ClassCastException: \
java.lang.String cannot be cast to \
org.jbpm.task.utils.MarshalledContentWrapper</p><p>     \
     at \
org.jbpm.task.utils.ContentMarshallerHelper.unmarshall(ContentMarshallerHelper.java:157)</p><p>     \
     at \
org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler.handleCompletedTask(GenericHTWorkItemHandler.java:208)</p><p>     \
     at \
org.jbpm.process.workitem.wsht.GenericHTWorkItemHandler$TaskCompletedHandler$1.run(GenericHTWorkItemHandler.java:187)</p><p>     \
     at java.lang.Thread.run(Thread.java:722)</p><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></blockquote></div>
<div style="background-color: #f4f4f4; padding: 10px; margin-top: 20px;">
<p style="margin: 0;">Reply to this message by <a \
href="https://community.jboss.org/message/757289#757289">going to Community</a></p> \
<p style="margin: 0;">Start a new discussion in jBPM at <a \
href="https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034">Community</a></p>
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