JBPM6 Service task to execute java code

Question

I am new in JBPM6. My scenario is like this that i want to execute some java code using JBPM service task.From documentation i am not able to understand how to use domain sp

Answer 1

I know the question is already answered, but I wanted to do the same (execute java code in service task) without creating work item definition (I did't want to use a custom task but a service task as it is). This is how I solved it:

here I read about the ServiceTaskHandler but I couldn't find very good info about the usage.

I read the ServiceTaskHandler code, it uses reflection to run your java code.

I found this (it says jbpm5-samples but I tested with jbpm 6.3), it uses a service task, the service task executes method "hello" from a Class (HelloService) you create:

package com.test;

import java.util.HashMap;
import java.util.Map;

public class HelloService {

    public DataOutput hello(com.test.DataInput name) {
        Map dataMap = new HashMap();
        dataMap.put("s", "Hello " + name.getDataMap().get("s") + "!");
        DataOutput output = new DataOutput(dataMap);
        return output;
    }

}

The ServiceTaskHandler is registered the same way as the step (5) in the answer marked correct:

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

//Register handlers
ksession.getWorkItemManager().registerWorkItemHandler("Service Task",        new ServiceTaskHandler());

After that I associated the service task with the java class (HelloService - method hello). To do that I used the eclipse bpmn modeler but I didn't find it very intuitive, so I opened the sample's bpmn file (BPMN2-ServiceProcess.bpmn2) with the modeler and filled my service task with the same stuff I read there.