quartz 任务调度

quartz

设置参数， 获取参数

在job中使用spring注入的service对象

循环获取所有的job

删除job

@PersistJobDataAfterExecution

@DisallowConcurrentExecution

maven 中添加依赖

  <dependency>
      <groupId>org.quartz-scheduler</groupId>
      <artifactId>quartz</artifactId>
      <version>2.2.1</version>
  </dependency>
  <dependency>
      <groupId>org.quartz-scheduler</groupId>
      <artifactId>quartz-jobs</artifactId>
      <version>2.2.1</version>
  </dependency>   

quartz 的 API 设计使用 domain-specific language (DSL)，  写起来十分的流畅， 可读性高。 写之前先导入类方便IDE联想：

  import org.quartz.Scheduler;
  import org.quartz.SchedulerException;
  import org.quartz.impl.StdSchedulerFactory;
  import static org.quartz.JobBuilder.*;
  import static org.quartz.TriggerBuilder.*;
  import static org.quartz.SimpleScheduleBuilder.*;

使用：

    @Test
    public void test4() throws SchedulerException {
        Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
        JobDetail job1 = newJob(JobTest1.class)
                // 第一个参数name: job名称，job的唯一标志如果一个job未执行完继续使用同名的jobName会报错，
                // 第二个参数group：分组名称，用于逻辑处理
                .withIdentity("test1", "test1Group").build();
        Trigger trigger1 = newTrigger()
                .withIdentity("test1", "test1Group")
                .usingJobData("name", "scott") //设置参数，在JobTest1类中取用
                .usingJobData("gender","male")
                .startNow() // 立即执行
                .withSchedule(simpleSchedule()     //通过simpleSchedule定时， 有很多种类,比如cron等等
                        .withIntervalInSeconds(60)   //每60秒执行一次, 单位可设置为分，时，秒，毫秒
                        .withRepeatCount(2)) //  执行次数设置为2次，应为立即执行了一次， 所以实际执行此时是withRepeatCount+1次
                .build();

        JobDataMap jobDataMap = new JobDataMap();
        jobDataMap.put("name", "scott");
        JobDetail job2 = newJob(JobTest2.class)
                .withIdentity("test2", "test2Group")
                .usingJobData(jobDataMap)
                .build();
        Trigger trigger2 = newTrigger()
                .withIdentity("test2", "test2Group")
                .startNow()
                .withSchedule(simpleSchedule()
                        .withIntervalInSeconds(20)
                        .repeatForever()) // 奔流到海不复回
                .build();

        scheduler.scheduleJob(job1, trigger1);
        scheduler.scheduleJob(job2, trigger2);
        scheduler.start();
    }

JobTest1代码

package com.quartz;

import org.quartz.*;

public class JobTest1 implements Job {

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        JobDataMap jobDataMap = context.getMergedJobDataMap();
        String name = jobDataMap.getString("name");  //获取参数
        int gender = jobDataMap.getIntValue("gender");
        System.out.println(name+gender);
    }
}

JobTest2 的代码：

package com.quartz;

import com.service.device.DeviceService;
import org.quartz.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.support.SpringBeanAutowiringSupport;

@PersistJobDataAfterExecution
@DisallowConcurrentExecution
public class JobTest2 implements Job {
    @Autowired
    private DeviceService deviceService;

    @Override
    public void execute(JobExecutionContext context) {
        SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);  //在非spring托管的类中使用spring的对象
        Integer result = deviceService.selectIdBydeviceCode("154653468");  //调用service层方法向数据库中查询数据
        System.out.println(result);

        JobDataMap jobDataMap = context.getMergedJobDataMap();
        String name = jobDataMap.getString("name");
        System.out.println(name);  //获取设置的参数

        SimpleTrigger trigger = (SimpleTrigger) context.getTrigger();
        int times = trigger.getTimesTriggered();  //获取当前执行次数
        System.out.println("我是job2第"+times+"次运行");
    }
}

循环所有的job， 删除指定job

   @Test
    public void testQuartz1() {
        try {
            Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
            for (String groupName : scheduler.getJobGroupNames()) {
                for (JobKey jobKey : scheduler.getJobKeys(GroupMatcher.jobGroupEquals(groupName))) {
                    String jobName = jobKey.getName();
                    String jobGroup = jobKey.getGroup();
                    List<Trigger> triggers = (List<Trigger>) scheduler.getTriggersOfJob(jobKey);
                    Date nextFireTime = triggers.get(0).getNextFireTime();
                    System.out.println(jobName + "第"+times+"次运行, 存在" + jobGroup + "组，距离下次到期时间" + nextFireTime);
                    if(jobName.equalsIgnoreCase("test2"))  //删除job
                        scheduler.deleteJob(jobKey);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }