org.jbpm.graph.def.DelegationException

[pedrosacosta]

I've the following code:

package com.sample;

import junit.framework.TestCase;

import org.jbpm.graph.def.*;
import org.jbpm.graph.exe.*;
import org.jbpm.taskmgmt.exe.*;
//import com.sample.action.GravarOcorrenciaHandler;


public class GestaoOcorrencias extends TestCase {

 public void testTaskAssignment(){

 ProcessDefinition processDefinition = ProcessDefinition.parseXmlString(
 "<process-definition name='the baby process'>" +
 " <start-state>" +
 " <transition name='baby cries' to='t' />" +
 " </start-state>" +
 " <task-node name='t'>" +
 " <task name='change nappy'>" +
 " <assignment class='com.sample.action.GravarOcorrenciaHandler' />" +
 " </task>" +
 " <transition to='end' />" +
 " </task-node>" +
 " <end-state name='end' />" +
 "</process-definition>"
 );


 ProcessInstance processInstance = new ProcessInstance(processDefinition);
 Token token = processInstance.getRootToken();

 token.signal();

 assertSame(processDefinition.getNode("t"), token.getNode());
 TaskInstance taskInstance = (TaskInstance)
 processInstance
 .getTaskMgmtInstance()
 .getTaskInstances()
 .iterator().next();

 assertEquals("papa", taskInstance.getActorId() );

 taskInstance.end();

 assertSame(processDefinition.getNode("end"), token.getNode());
 }
}

package com.sample.action;

import org.jbpm.graph.exe.ExecutionContext;
import org.jbpm.taskmgmt.exe.Assignable;

public class GravarOcorrenciaHandler {
 public void assign(Assignable assignable, ExecutionContext executionContext)
 {
 assignable.setActorId("papa");
 System.out.println("SUCCESS");
 }
}
[\code]


When i compile it, i've

org.jbpm.graph.def.DelegationException at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:299) at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293) at org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:293) at org.jbpm.taskmgmt.exe.TaskMgmtInstance.invokeAssignmentHandler(TaskMgmtInstance.java:149) at org.jbpm.taskmgmt.exe.TaskInstance.assign(TaskInstance.java:137) at org.jbpm.taskmgmt.exe.TaskMgmtInstance.createTaskInstance(TaskMgmtInstance.java:102)
 at org.jbpm.graph.node.TaskNode.execute(TaskNode.java:136)
 at org.jbpm.graph.def.Node.enter(Node.java:284)
 at org.jbpm.graph.def.Transition.take(Transition.java:92)
 at org.jbpm.graph.def.Node.leave(Node.java:349)
 at org.jbpm.graph.node.StartState.leave(StartState.java:73)
 at org.jbpm.graph.exe.Token.signal(Token.java:127)
 at org.jbpm.graph.exe.Token.signal(Token.java:92)
 at com.sample.GestaoOcorrencias.testTaskAssignment(GestaoOcorrencias.java:34)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
 at java.lang.reflect.Method.invoke(Unknown Source)
 at junit.framework.TestCase.runTest(TestCase.java:154)
 at junit.framework.TestCase.runBare(TestCase.java:127)
 at junit.framework.TestResult$1.protect(TestResult.java:106)
 at junit.framework.TestResult.runProtected(TestResult.java:124)
 at junit.framework.TestResult.run(TestResult.java:109)
 at junit.framework.TestCase.run(TestCase.java:118)
 at junit.framework.TestSuite.runTest(TestSuite.java:208)
 at junit.framework.TestSuite.run(TestSuite.java:203)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.lang.ClassCastException: com.sample.action.GravarOcorrenciaHandler
 at org.jbpm.taskmgmt.exe.TaskMgmtInstance.invokeAssignmentHandler(TaskMgmtInstance.java:141)
 ... 25 more

What is wrong? Can anybody explain the reason for this exception, and what has to be done to solve this?
This example is a copy of Task assignment example in http://docs.jboss.com/jbpm/v3/userguide/tutorial.html#helloworldexample

Thanks,

[pedrosacosta]

Nevermind, i've solved the problem

[pedrosacosta]

Oooops, no i haven't. The problem is still on, except, i put the following line
public class GravarOcorrenciaHandler implements AssignmentHandler, instead of public class GravarOcorrenciaHandler.

This post lead me to another question, why can we remove our posts? (hummmmmm).

[pedrosacosta]

This post lead me to another question, why can't we remove our posts? (hummmmmm).

[kukeltje]

Nothing wrong with your testcase here. Are you sure there isn't an old compiled version of your class hanging around soemwhere?

[pedrosacosta]

you are right. Thanks.