一：bpmn

二：java

repositoryService.createDeployment().name("消息事件流程")
      .addClasspathResource("bpmn/msg_event_process.bpmn").deploy();
identityService.setAuthenticatedUserId("huihui");
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("StartMessageEventProcess", "key1");

// 主流程：提交订单
Task task = taskService.createTaskQuery().processInstanceId(processInstance.getId()).singleResult();
taskService.complete(task.getId());
System.out.println("主流程 " + task.getProcessInstanceId());

// 根据不同的值启动不同的消息流程
String payType = "alipay";
runtimeService.startProcessInstanceByMessage(payType);

三：db