JBPM4学习总结之9——子流程（sub-process）

一个复杂的程序可以分成几个细微的模块开发，同样一个复杂的业务流程也可以分成几个及其微小的子流程去执行、管理。

我们先来看看父流程，如图：

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其中Subprocess1是一个子流程，在别的流程定义中单独有定义，

子流程如图：

?父流程的xml内容如下：

<?xml version="1.0" encoding="UTF-8"?><process name="ProcessFather" xmlns="http://jbpm.org/4.4/jpdl"><start name="start1" g="75,52,48,48"><transition name="to Subprocess1" to="Subprocess1" g="304,75:-96,-22" /></start><state name="wait" g="61,241,92,52" /><sub-process name="Subprocess1" g="243,143,117,52"sub-process-key="ProcessSub"><parameter-in var="fatherVar" subvar="subVar" /><parameter-out var="fatherRes" subvar="subRes" /><transition name="to wait" to="wait" g="302,268:-44,-22" /></sub-process></process>

?测试程序如下

/** * 开始父流程 传入参数 */public void test03StartFather() {Map<String, Object> in = new HashMap<String, Object>();in.put("fatherVar", "你爸是李刚");// 开始process流程ProcessInstance processInstance = executionService.startProcessInstanceByKey("ProcessFather", in);// 流程实例的IDString pid = processInstance.getId();System.out.println(pid);// ProcessFather.20001}/** * 看子流程 */public void test04SubSeeTask() {List<Task> list = taskService.findPersonalTasks("liuyan");for (Task task : list) {String taskId = task.getId();String subValue = (String) taskService.getVariable(taskId, "subVar");System.out.println(subValue);}}/** * 结束子流程的任务,向父流程传输参数 */public void test05completeTask() {List<Task> list = taskService.findPersonalTasks("liuyan");for (Task task : list) {String taskId = task.getId();// 传给父流程的参数Map<String, Object> res = new HashMap<String, Object>();res.put("subRes", "你是小霸王");taskService.setVariables(taskId, res);taskService.completeTask(taskId);}}/** * 查找父流程的变量 */public void test06findFatherRes() {// 20001ProcessInstance processInstance = executionService.findProcessInstanceById("ProcessFather.20001");String processInstanceId = processInstance.getId();String result = (String) executionService.getVariable(processInstanceId, "fatherRes");System.out.println(result);}