BPMN2.0 工作流 实例

1.BPMN 业务流程建模标注 详细介绍请看

   http://www.uml.org.cn/RequirementProject/200904141.asp

 

2.BPMN是OMG推出的一种工作流建模的标准。还有JBoss自己搞的Jbpm,但jbpm不是标准。

 

3.BPMN的资料不多，设计器设计出来的BPMN很多不是标准的BPMN2.0.如果eclipse stp bpmn,oracle bpm..

 

4.Jbpm4.3推出来之后，开始支持BPMN2.0.所以这次我用jbpm4.3的跑我设计的BPMN工作流。

 

5.准备工作(我的平台)

   Eclipse 3.5.2

   JDK1.6

   Tomcat 6

   JBPM4.3(安装请看http://blog.csdn.net/inkfish/archive/2010/01/10/5169700.aspx)

 

 

6.请假系统工作流

7.实现上面工作流的BPMN代码---leave.bpmn.xml

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://schema.omg.org/spec/BPMN/2.0 ../../../../../../../../../../bpmn/src/main/resources/BPMN20.xsd"
	xmlns="http://schema.omg.org/spec/BPMN/2.0" typeLanguage="http://www.w3.org/2001/XMLSchema"
	expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://jbpm.org/example/bpmn2/none_start_end_event"
	xmlns:jbpm="http://jbpm.org/bpmn2">
	<process id="leave" name="BPMN2 Example process">

		<startEvent id="start" />

		<sequenceFlow id="flow1" name="To Apply Leave" sourceRef="start"
			targetRef="applyLeave" />

		<userTask id="applyLeave" name="Apply Leave" implementation="other">
			<potentialOwner resourceRef="user" jbpm:type="group">
				<resourceAssignmentExpression>
					<formalExpression>user</formalExpression>
				</resourceAssignmentExpression>
			</potentialOwner>
		</userTask>

		<sequenceFlow id="to_teacher" name="To Teacher Check"
			sourceRef="applyLeave" targetRef="techerCheck" />

		<userTask id="techerCheck" name="Teacher Check" 
			implementation="other">
			<potentialOwner resourceRef="user" jbpm:type="group">
				<resourceAssignmentExpression>
					<formalExpression>teachers</formalExpression>
				</resourceAssignmentExpression>
			</potentialOwner>
		</userTask>
		
		<sequenceFlow id="teacherRefuse" name="Teacher Refuse"
			sourceRef="techerCheck" targetRef="applyLeave">
			<conditionExpression xsi:type="tFormalExpression">${approveResult == 'NotOK'}</conditionExpression>
		</sequenceFlow>

		<sequenceFlow id="to_decide" name="To Decide" sourceRef="techerCheck"
			targetRef="decideBasedOnAmountGateway" >
			<conditionExpression xsi:type="tFormalExpression">${approveResult == 'OK'}</conditionExpression>
		</sequenceFlow>

		<exclusiveGateway id="decideBasedOnAmountGateway"
			name="decideBasedOnAmount" />

		<sequenceFlow id="to_master" name="To Master"
			sourceRef="decideBasedOnAmountGateway" targetRef="masterCheck">
			<conditionExpression xsi:type="tFormalExpression">${days &gt; 3}</conditionExpression>
		</sequenceFlow>

		<sequenceFlow id="to_end1" name="To End1"
			sourceRef="decideBasedOnAmountGateway" targetRef="theEnd">
			<conditionExpression xsi:type="tFormalExpression">${days &lt;= 3}</conditionExpression>
		</sequenceFlow>

		<userTask id="masterCheck" name="Master Check"
			implementation="other">
			<potentialOwner resourceRef="user" jbpm:type="group">
				<resourceAssignmentExpression>
					<formalExpression>masters</formalExpression>
				</resourceAssignmentExpression>
			</potentialOwner>
		</userTask>

		<sequenceFlow id="masterRefuse" name="Master Refuse"
			sourceRef="masterCheck" targetRef="applyLeave">
			<conditionExpression xsi:type="tFormalExpression">${approveResult == 'NotOK'}</conditionExpression>
		</sequenceFlow>
		
		<sequenceFlow id="to_end2" name="To End2" sourceRef="masterCheck"
			targetRef="theEnd">
			<conditionExpression xsi:type="tFormalExpression">${approveResult == 'OK'}</conditionExpression>
		</sequenceFlow>

		<endEvent id="theEnd" name="End" />
	</process>

</definitions>

 没有设计器，都是我自己看BPMN2.0的介绍和JBPM的内容，自己写出来的 leave.bpmn.xml

 

8.剩下的使用JBPM4.3的API让我的leave.bpmn.xml，跑起来

思想是：

     学生都放在user用户组。user组都可以申请请假

     老师放在teachers用户组。该用户组都可以审批学生请假(登录是用teacher)

     主任放在masters用户组。该用户组审批请假超过3天的学生请假。(登录是用master)

 

部分代码：

	String username = session.getAttribute("username").toString();
	ProcessEngine processEngine = Configuration.getProcessEngine();//获得工作流引擎
	RepositoryService repositoryService = processEngine//获得启动的工作流
			.getRepositoryService();
	ExecutionService executionService = processEngine//获得 工作流实例
			.getExecutionService();
	TaskService taskService = processEngine.getTaskService();//获得 任务

	List<ProcessDefinition> pdList = repositoryService
			.createProcessDefinitionQuery().processDefinitionKey(
					"leave").list();
	List<ProcessInstance> piList = executionService
			.createProcessInstanceQuery().list();
	List<Task> taskList = taskService.createTaskQuery().candidate(
			username).list();

 

具体看代码。我上传了

 

 

 

评论

2 楼 java太保 2011-08-23  

直接写xml是麻烦，用这个不错Joinwork Process Studio

1 楼 snowfox2008 2010-08-15  

哥们，你的图和XML都不一致，图中少了exclusiveGateway 节点