Help for creating async task in jBPM 6 using eclipse.

[rsmagdum]

Hi,

I want to execute following bpmn process which has async task.

Is it necessary to write work item handler for async task?
beacause while running this project i got this exception

Caused by: org.drools.core.WorkItemHandlerNotFoundException: Could not find work item handler for async

How to register async task work item handler?

CommandClass = org.jbpm.examples.cmd.UserCommand

i have following files in project

1) main process

package org.jbpm.examples.main;

import java.util.HashMap;

import java.util.Map;

import java.util.Properties;

import org.kie.api.io.ResourceType;

import org.kie.api.runtime.process.ProcessInstance;

import org.kie.api.runtime.process.WorkItemManager;

import org.kie.internal.KnowledgeBase;

import org.kie.internal.builder.KnowledgeBuilder;

import org.kie.internal.builder.KnowledgeBuilderFactory;

import org.kie.internal.io.ResourceFactory;

import org.kie.internal.runtime.StatefulKnowledgeSession;

import org.jbpm.*;

import org.jbpm.executor.impl.ExecutorImpl;

import org.jbpm.examples.cmd.UserCommand;

import org.jbpm.examples.data.User;

public class ProcessMain {

  public static void main(String[] args) {

  KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();

  int choice = 1;

  switch(choice){

  case 1:

  kbuilder.add(ResourceFactory.newClassPathResource("async_test_01.bpmn"), ResourceType.BPMN2);

  KnowledgeBase kbase = kbuilder.newKnowledgeBase();

  StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();

  //--------------------------------------------

  User user = new User("Rahul",22);

  Map<String,Object> params = new HashMap<String,Object>();

  params.put("user",user);

  params.put("command", "org.jbpm.examples.cmd.UserCommand");

  //-------------------------------------------

  ProcessInstance process= ksession.startProcess("org.jbpm.examples.bpmn.async_test_01",params);

  break;

  }

  }

}

2) bpmn process

attached

[salaboy21]

Have you checked this blog post?

-> http://mswiderski.blogspot.co.uk/2013/08/make-your-work-asynchronous.html

[rsmagdum]

Hi Mauricio,

I executed asynchronous task example using kie workbench. But i want to do same in my eclipse project.

As specified in above blog, we need specify TaskName as "async" and give command as fully qualified class name of our Command Class ie

org.jbpm.examples.cmd.UserCommand in this case.

I created a task and specified TaskName as "async" and also specified required i/o parameters.

UserCommand class is defined under org.jbpm.examples.cmd package.

But it still gives 'Could not find work item handler for async' exception.

In workItemHandler case, we write seperate workItemHandler and put our business login in executeWorkItem() method.

But while using async task, this business logic is specified in Command class, right?

so still is it necessary to register workItemHandler for this async task? if yes, how?

and what is the way to set/get jbpm executor configurations parameters like thread pool size, retry count, interval through java code?

Thanks,

Rahul

[tujasiri]

I hate that good questions like this go answered.  Did you ever get this resolved?

[amoolya.da]

Hi Rahul,

were you able to solve this? i am getting similar issue in 6.4. i followed steps provided in jBPM executor for embedded applicatin in Eclipse

i am getting "Cannot add asset: Process 'AsyncProcess' [com.ZZ.AsyncProcess]: Task node 'AsyncService' [2] has no task type.,"

where is my process name and AsyncService is my task name.