第十节:Activiti6.0——四种Job工作的产生与管理

<process id="myProcess_1" isClosed="false" isExecutable="true" processType="None">
    <startEvent id="_2" name="StartEvent"/>
    <endEvent id="_3" name="EndEvent"/>
    <userTask activiti:exclusive="true" id="UserTask" name="UserTask"/>
    <!--开启异步，并指定委托类(在下面编码中)。注意：activiti开头的元素不属于bpmn规范，因此该bpmn文件不能移植到其他流程引擎中-->
    <serviceTask activiti:exclusive="true" id="ServiceTask" name="ServiceTask"
                 activiti:async="true" activiti:class="com.xjf.test.MyJavaDelegate"/>
    <sequenceFlow id="_6" sourceRef="_2" targetRef="ServiceTask"/>
    <sequenceFlow id="_7" sourceRef="ServiceTask" targetRef="UserTask"/>
    <sequenceFlow id="_8" sourceRef="UserTask" targetRef="_3"/>
  </process>

/**
 * 实现委托类，需要被ServiceTask元素引用
 *
 * @Author: xjf
 * @Date: 2019/12/2 23:20
 */
public class MyJavaDelegate implements JavaDelegate {

    @Override
    public void execute(DelegateExecution delegateExecution) {
        System.out.println("这是处理类");
    }
}

<!--开启异步执行器，异步才会自动异步执行，比如异步工作、定时器工作等-->
<property name="asyncExecutorActivate" value="true" />

public static void main(String[] args) throws InterruptedException {
ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
RepositoryService repositoryService = processEngine.getRepositoryService();
RuntimeService runtimeService = processEngine.getRuntimeService();

Deployment deployment = repositoryService.createDeployment().addClasspathResource("service-task.bpmn").deploy();
ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).singleResult();

ProcessInstance processInstance = runtimeService.startProcessInstanceById(processDefinition.getId());

// 可以查看act_ru_job，会有异步工作。不过此时没有开启异步执行器，流程是卡在ServiceTask任务的，没有往下执行。
// 开启后将看不到数据，因为直接执行了（是异步的）
System.out.println("流程实例id: " + processInstance.getId());

processEngine.close();
System.exit(0);
    }

<process id="myProcess_1" isClosed="false" isExecutable="true" processType="None">
  <startEvent id="_2" name="StartEvent"/>
  <intermediateCatchEvent id="IntermediateCatchingEvent" name="IntermediateCatchingEvent">
    <timerEventDefinition>
      <!--定时任务，定时为一分钟-->
      <timeDuration>PT1M</timeDuration>
    </timerEventDefinition>
  </intermediateCatchEvent>
  <userTask activiti:exclusive="true" id="UserTask" name="UserTask"/>
  <endEvent id="_5" name="EndEvent"/>
  <sequenceFlow id="_6" sourceRef="_2" targetRef="IntermediateCatchingEvent"/>
  <sequenceFlow id="_7" sourceRef="IntermediateCatchingEvent" targetRef="UserTask"/>
  <sequenceFlow id="_8" sourceRef="UserTask" targetRef="_5"/>
</process>

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
RepositoryService repositoryService = processEngine.getRepositoryService();
RuntimeService runtimeService = processEngine.getRuntimeService();

Deployment deployment = repositoryService.createDeployment().addClasspathResource("timer-task.bpmn").deploy();
ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).singleResult();
ProcessInstance processInstance = runtimeService.startProcessInstanceById(processDefinition.getId());

System.out.println("流程实例id：" + processInstance.getId());

//程序不能马上关闭，需要等待定时任务执行，然后程序死了，定时任务没法执行
Thread.sleep(120000);


processEngine.close();
System.exit(0);

<timerEventDefinition>
  <!--定时5分钟-->
  <timeDuration>PT5M</timeDuration>
</timerEventDefinition>

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
RepositoryService repositoryService = processEngine.getRepositoryService();
RuntimeService runtimeService = processEngine.getRuntimeService();

Deployment deployment = repositoryService.createDeployment().addClasspathResource("suspend-task.bpmn").deploy();
ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).singleResult();
ProcessInstance processInstance = runtimeService.startProcessInstanceById(processDefinition.getId());

System.out.println("流程实例ID：" + processInstance.getId());

//因为定时任务时间为5分钟，此时等待10s时工作存放在act_ru_timer_job中
Thread.sleep(10000);

//将任务暂停,则任务会存放到表act_ru_suspended_job中
runtimeService.suspendProcessInstanceById(processInstance.getId());

//再次等待10s后，将任务激活，则任务回到act_ru_timer_job中
Thread.sleep(10000);
runtimeService.activateProcessInstanceById(processInstance.getId());

processEngine.close();
System.exit(0);

public class ExceptionDelegate implements JavaDelegate {
    @Override
    public void execute(DelegateExecution execution) {
        System.out.println("这是执行器");
        //测试不可执行的任务，手动出错
        throw new RuntimeException("always exception 手动抛出");
    }
}

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
RepositoryService repositoryService = processEngine.getRepositoryService();
RuntimeService runtimeService = processEngine.getRuntimeService();
ManagementService managementService = processEngine.getManagementService();

Deployment deployment = repositoryService.createDeployment().addClasspathResource("error-task.bpmn").deploy();
ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).singleResult();
ProcessInstance processInstance = runtimeService.startProcessInstanceById(processDefinition.getId());

System.out.println("流程实例ID：" + processInstance.getId());

//任务重试次数默认为三次，手动设置为一次，方便快速测试查看
Job job = managementService.createJobQuery().processInstanceId(processInstance.getId()).singleResult();
managementService.setJobRetries(job.getId(),1);

Thread.sleep(30000);

processEngine.close();
System.exit(0);