how to resume process

[kmwen]

hi,

i am newbee for jBPM. i have a qustion about how to resume a process.

i difine a test process p1 as: start->A->B->end. in activity A i throw an exception, and because of WaitForSignal the process go to wait for signal.

And then i start a exception handling process p2 as: start -> D->E->end. i'd like to know can i in p2 resume p1? and how?

thx

wen

[kmwen]

I define the fisrt process definition as following:

ProcessEngine processEngine = new Configuration().setResource("jbpm.cfg.xml").buildProcessEngine();

  RepositoryService repositoryService = processEngine.getRepositoryService();

  ExecutionService executionService = processEngine.getExecutionService();

  repositoryService.createDeployment().addResourceFromClasspath("testFragment.jpdl.xml").deploy();

  executionService.startProcessInstanceByKey("testFragment");

The testFragment is as following;

<?xml version="1.0" encoding="UTF-8"?>

<process name="testFragment" xmlns="http://jbpm.org/4.4/jpdl">
   <start g="48,134,48,48" name="start">
      <transition name="to HelloWorld" to="HelloWorld" g="-87,-22"/>
   </start>
   <custom class="org.jbpm.testMigration.MyTest" g="359,196,92,52" name="Test">
      <transition name="to end" to="end" g="-43,-22"/>
   </custom>
   <java class="org.jbpm.testMigration.HelloWorld" g="147,194,92,52" method="printHelloWorld" name="HelloWorld">
      <transition name="to Test" to="Test" g="-45,-22"/>
   </java>
   <end g="554,146,48,48" name="end"/>
</process>

in custom node i throw an exception und catch it in catch block

catch (Exception e) {  

         System.out.println("we need the exception handling");

          activityExecution.waitForSignal();

        ProcessEngine processEngine = new Configuration().setResource("jbpm.cfg.xml").buildProcessEngine();

        RepositoryService repositoryService = processEngine.getRepositoryService();

        ExecutionService executionService = processEngine.getExecutionService();

        executionService.signalExecutionById("testFragment");

}

when i execute testFragment, the following execption occurres:

exception in thread "main" org.jbpm.api.JbpmException: execution testFragment does not exist.

how can i resume the testFragment? pleas help

[vmdocua]

Hi km wen,

Out of curiosity why did you create two ProcessEngine instances there? First process lives/managed by  process engine A (where testFragment.jpdl.xml definition deployed), while for signaling used another process engine B. It's possible to reuse the same process engine instance inside single JVM process.

Another issue is "signalExecutionById" parameter - "execution ID" is not process definition ID or key or similar. Search for "execution id" phrase in this document http://docs.jboss.com/jbpm/v4/userguide/html_single/ for better understanding.

--

Thanks,

Vadim.

[kmwen]

hi, vadim

thx for anwser

because i want to use external exception handling to handle the exception, i create two process engine.

i changed the definition of test fragment as following:

private  ProcessDefinition createSimpleFragmentDefinitionStart() {

  ProcessDefinitionBuilder builder2 = ProcessDefinitionBuilder.startProcess("Second Definition");

  builder2.startActivity(new StartActivity()).initial().transition("A1").endActivity();

  builder2.startActivity("A1", new Display("A1")).transition("A").endActivity();

  builder2.startActivity("A", new MyTest()).transition("B1").endActivity();

  builder2.startActivity("B1", new Display("B1")).endActivity();

  return builder2.endProcess();

}

ClientProcessInstance getInstance(){

  ProcessDefinition pd = createSimpleFragmentDefinitionStart();

  ClientProcessInstance pi = ((ProcessDefinitionImpl) pd).startProcessInstance();

  return pi;

}

and then i start this test process:

public static void main(String[] args) throws NullPointerException{

  TestExceptionHandling te = new TestExceptionHandling1();

  te.createSimpleFragmentDefinitionStart();

  te.getInstance();

}

i try to resume the test process in exception handling process, and back to the activity A, because activity A1 is complete.  I think i should get the processInstance of test process and use executionService.signalProcessById() to resume, but it doesn't  work.