jbpm知识点——Superstates、event

超状态是一组节点，超状态可以被递归嵌套。超状态可以被用来在流程定义中产生一些层次，例如，一个应用可能要把流程中的所有节点按阶段进行分组。动作可以与超状态事件关联，结果就是一个令牌在某个给定时间可以存在于多个嵌套的节点，这便于检查流程是否执行，比如，是否在启动阶段。在Jbpm模型中，你可以任意分组任何节点到一个超状态。在指定节点时用（/）隔开节点名称，用“..”指向上一层次。 

<?xml version="1.0" encoding="UTF-8"?>
<process-definition xmlns="" name="yytest">
    <event type='superstate-enter'>
        <action name='Enter' class='com.jeffentest.JeffenActionHandler' />
    </event>
    <event type='superstate-leave'>
        <action name='Leave' class='com.jeffentest.JeffenActionHandler' />
    </event>

  <start-state name='START' >
    <transition name='done' to='SS_1/N1.1'/>
  </start-state>

  <super-state name="SS_1">
    <node name='N1.1'>
       <transition name='done' to='SS_1.2/N1.2'/>
    </node>
    <super-state name="SS_1.2">
        <node name='N1.2'>
            <transition name='done' to='SS_1.3/N1.3'/>
        </node>
        <super-state name="SS_1.3">
            <node name='N1.3'>
                <transition name='done' to='/N999'/>
            </node>
        </super-state>
    </super-state>
  </super-state>
 
  <state name="N999">
    <transition name='done' to='END'/>
  </state>

  <end-state name="END" />
</process-definition>
-------------------------------------------

package com.jeffentest;

import org.jbpm.graph.def.ActionHandler;
import org.jbpm.graph.exe.ExecutionContext;
import java.io.*;

public class JeffenActionHandler implements ActionHandler {
  private static final long serialVersionUID = 1L;
  public void execute(ExecutionContext executionContext) {
   String msg = executionContext.getEvent().getEventType()+":"+executionContext.getEventSource().getName();
   System.out.println(msg);
    }
 }

-------------------------------------------------

private static void run(){
  JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
  try {
   long processInstanceId =1;
   processInstance = jbpmContext.loadProcessInstance(processInstanceId);
   Token token = processInstance.getRootToken();
   System.out.println(token.getNode());
   token.signal();
   System.out.println(token.getNode());
   token.signal();
   System.out.println(token.getNode());
   token.signal();
   System.out.println(token.getNode());
   token.signal();
   System.out.println(token.getNode());
   token.signal();
   System.out.println(token.getNode());
   token.signal();
   System.out.println(token.getNode());
   jbpmContext.save(processInstance);
   }finally {
     jbpmContext.close();
   }
 } 

---------------------------------------------------

运行结果：从进入、离开的顺序看得出嵌套的关系。

StartState(START)
superstate-enter:SS_1
superstate-enter:SS_1.2
superstate-enter:SS_1.3
superstate-leave:SS_1.3
superstate-leave:SS_1.2
superstate-leave:SS_1
State(N999)
EndState(END)