processvaribletest.java

对jbpm工作流进行简单的实现与操作

package com.sample;

import junit.framework.TestCase;   

import org.jbpm.context.exe.ContextInstance;   
import org.jbpm.graph.def.ProcessDefinition;   
import org.jbpm.graph.exe.ProcessInstance;   
  
  
public class ProcessVaribleTest extends TestCase {   
       
    public void  testProcessVaribles(){   
        // 这个例子还是从hello world流程开始,这次甚至没有修改.   
        ProcessDefinition processDefinition = ProcessDefinition.parseXmlString(   
          "<process-definition>" +   
          "  <start-state>" +   
          "    <transition to='s' />" +   
          "  </start-state>" +   
          "  <state name='s'>" +   
          "    <transition to='end' />" +   
          "  </state>" +   
          "  <end-state name='end' />" +   
          "</process-definition>"  
        );   
  
        ProcessInstance processInstance =   
          new ProcessInstance(processDefinition);   
  
        // 从流程实例中取得同流程变量一起工作的上下文实例   
           
        ContextInstance contextInstance =    
          processInstance.getContextInstance();   
  
        // 在流程已经离开开始状态之前，我们将在流程实例的上下文中设置一些变量.   
           
        contextInstance.setVariable("amount", new Integer(500));   
        contextInstance.setVariable("reason", "i met my deadline");   
  
        // 从现在开始,这些变量同流程实例关联在一起.   
        // 流程变量现在可以通过显示的API被用户代码来访问.   
        // 流程变量也可以作为流程实例的一部分存储到数据库中.   
  
        processInstance.signal();   
  
        // 通过上下文实例是可以可以访问变量的   
  
        assertEquals(new Integer(500),    
                     contextInstance.getVariable("amount"));   
        assertEquals("i met my deadline",    
                     contextInstance.getVariable("reason"));   
  
    }   
  
}