Jbpm6 service task execution java code

I'm new to jbpm6 My scenario is like this. I want to use jBPM service task to execute some java code From the documentation, I can't understand how to use domain specific processes and work item handlers in this type of code

Thank you first

Solution

Here's how to add a handler to the eclipse Maven project I call it the awesome handler, but you should choose a more specific name

1) First, in Src / main / resources / workitemdefinitions Create a work item definition file in wid My icon file is located in Src / main / resources

import org.drools.core.process.core.datatype.impl.type.StringDataType;

[
  [
    "name" : "Awesome","parameters" : [
      "Message1" : new StringDataType(),"Message2" : new StringDataType()
     ],"displayName" : "Awesome","icon" : "icon-info.gif"
  ]
]

2) In Src / main / resources / meta inf / customworkitemhandlers Create a work item handler configuration file in conf

[
  "Awesome": new org.jbpm.examples.util.handler.AwesomeHandler()
]

3) Create a drools session configuration file: Src / main / resources / meta inf / drools session. conf

drools.workItemHandlers = CustomWorkItemHandlers.conf

4) Create your handler to match the class you defined in step 2

public class AwesomeHandler implements WorkItemHandler {

    public AwesomeHandler() {
        super();
    }

    public void executeWorkItem(WorkItem workItem,WorkItemManager manager) {
        System.out.println("Executing Awesome handler");
        manager.completeWorkItem(workItem.getId(),null);
    }

    public void abortWorkItem(WorkItem workItem,WorkItemManager manager) {
        System.out.println("Aborting");
    }
}

5) After the handler is established, it must be registered in the session

//Get session
KieSession ksession = runtime.getKieSession();

//Register handlers
ksession.getWorkItemManager().registerWorkItemHandler("Awesome",new AwesomeHandler());

At this point, you should restart eclipse When eclipse opens, there should be a "custom tasks" tab in the palette It should contain an entry marked "awesome" with the specified icon