activiti 5.12中新增的动态bpmn模型部署
activiti是不错的工作流,最近发现5.12中可以通过在运行期间动态生成一个BPMN的流程模型,因为一般来说,是通过如activiti designer这样的工具,去画好一个BPMN图的,现在可以通过代码的方法去生成了.acitivti 核心工作组的老外提供了一个完整的DEMO来演示,
详细代码在:https://github.com/frederikheremans/activiti-dynamic-process中,
下面小结下,代码其实很简单,如下:
@Testpublic void testDynamicDeploy() throws Exception {//创建bpmn模型 BpmnModel model = new BpmnModel(); Process process = new Process(); model.addProcess(process); process.setId("my-process");//创建bpmn元素 process.addFlowElement(createStartEvent()); process.addFlowElement(createUserTask("task1", "First task", "fred")); process.addFlowElement(createUserTask("task2", "Second task", "john")); process.addFlowElement(createEndEvent()); process.addFlowElement(createSequenceFlow("start", "task1")); process.addFlowElement(createSequenceFlow("task1", "task2")); process.addFlowElement(createSequenceFlow("task2", "end")); // 2.生成BPMN自动布局 new BpmnAutoLayout(model).execute(); // 3. 部署这个BPMN模型 Deployment deployment = activitiRule.getRepositoryService().createDeployment() .addBpmnModel("dynamic-model.bpmn", model).name("Dynamic process deployment") .deploy(); // 4. 启动流程实例 ProcessInstance processInstance = activitiRule.getRuntimeService() .startProcessInstanceByKey("my-process"); // 5 发起任务 List tasks = activitiRule.getTaskService().createTaskQuery() .processInstanceId(processInstance.getId()).list(); Assert.assertEquals(1, tasks.size()); Assert.assertEquals("First task", tasks.get(0).getName()); Assert.assertEquals("fred", tasks.get(0).getAssignee()); // 6. 保存bpmn流程图 InputStream processDiagram = activitiRule.getRepositoryService() .getProcessDiagram(processInstance.getProcessDefinitionId()); FileUtils.copyInputStreamToFile(processDiagram, new File("target/diagram.png")); // 7. 保存为bpmn.xml的xml类型文件 InputStream processBpmn = activitiRule.getRepositoryService() .getResourceAsStream(deployment.getId(), "dynamic-model.bpmn"); FileUtils.copyInputStreamToFile(processBpmn, new File("target/process.bpmn20.xml"));}//创建taskprotected UserTask createUserTask(String id, String name, String assignee) { UserTask userTask = new UserTask(); userTask.setName(name); userTask.setId(id); userTask.setAssignee(assignee); return userTask;}//创建箭头protected SequenceFlow createSequenceFlow(String from, String to) { SequenceFlow flow = new SequenceFlow(); flow.setSourceRef(from); flow.setTargetRef(to); return flow;}protected StartEvent createStartEvent() { StartEvent startEvent = new StartEvent(); startEvent.setId("start"); return startEvent;}protected EndEvent createEndEvent() { EndEvent endEvent = new EndEvent(); endEvent.setId("end"); return endEvent;}