[jboss-user] [jBPM] - Re: Question to process instance migration

[km wen]

km wen [http://community.jboss.org/people/kmwen] created the discussion

"Re: Question to process instance migration"

To view the discussion, visit: http://community.jboss.org/message/570852#570852

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thanks, michael,
it works, if i deploy new process definition from the same .xml file with different version as following:

ProcessDefinition pd1 = deployProcessDefinitionFromClasspath("org/jbpm/testMigration/a.jpdl.xml");  
  ProcessInstance pi1 = startAndSignal(pd1, "aa");
  ProcessInstance pi2 = startAndSignal(pd1,"b");
  ProcessInstance pi3 = startAndSignal(pd1,"c");
  
  assertTrue(pi3.isActive("c"));
  
  // here get new process definition
  ProcessDefinition pd2 = deployProcessDefinitionFromClasspath("org/jbpm/testMigration/a.jpdl.xml");
  assertEquals(pd2.getId(),"a-2");
  pi3 = executionService.findProcessInstanceById(pi3.getId());
  assertEquals(pd2.getId(),pi3.getProcessDefinitionId());
  
  // here the instances of the previously deployed process definition 
  //that are waiting in node "c" will be placed in the node "b". 
  assertTrue(pi3.isActive("b"));
__________________________________________________________________________________________
 I have wrote following code, but it's failed. I want to get the new definition from another process .xml file.

  ProcessDefinition pd1 = deployProcessDefinitionFromClasspath("org/jbpm/testMigration/a.jpdl.xml");  
  ProcessInstance pi1 = startAndSignal(pd1, "aa");
  ProcessInstance pi2 = startAndSignal(pd1,"b");
  final ProcessInstance pi3 = startAndSignal(pd1,"c");
  
  assertTrue(pi3.isActive("c"));
  
  // here get new process definition
  final ProcessDefinition pd2 = deployProcessDefinitionFromClasspath("org/jbpm/testMigration/a1.jpdl.xml");

new DefaultMigrationHandler().migrateInstance(pd2, pi3, new MigrationDescriptor());

  processEngine.execute(new Command() {
           
   public Object execute(Environment env) {
                new DefaultMigrationHandler().migrateInstance(pd2,
                    pi3, new MigrationDescriptor());
                env.get(Session.class).update(pi3);
                return null;
            }
  });
  assertTrue(pi3.isActive("b"));
  }

following is process definition .xml file:

<?xml version="1.0" encoding="UTF-8"?>
<process name="a" xmlns=" http://jbpm.org/4.4/jpdl http://jbpm.org/4.4/jpdl">
   <start g="33,107,48,48" name="s">
      <transition to="aa"/>
   </start>
   <task g="138,107,92,52" name="aa">
      <transition to="b"/>
   </task>
   <task g="274,108,92,52" name="b">
      <transition to="c"/>
   </task>
   <task g="407,107,92,52" name="c">
      <transition to="e"/>
   </task>
   <end g="549,109,48,48" name="e"/>
  <migrate-instances>
      <activity-mapping old-name="c" new-name="b"/>
     </migrate-instances>
</process>
________________________________-

<?xml version="1.0" encoding="UTF-8"?>
<process name="a1" xmlns=" http://jbpm.org/4.4/jpdl http://jbpm.org/4.4/jpdl">     
 <start g="11,99,48,48" name="s">      
  <transition to="aa"/>   
   </start>      
   <state g="106,94,110,52" name="aa">      
   <transition to="x"/>    
   </state>      
   <state g="290,96,110,52" name="x">     
    <transition to="e"/>    
    </state>     
     <end g="499,99,48,48" name="e"/>
     
 </process>
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