目前常用的几种任务调度

• Timer，简单无门槛，一般也没人用。

• spring @Scheduled注解，一般集成于项目中，小任务很方便。

• 开源工具 Quartz，分布式集群开源工具，以下两个分布式任务应该都是基于Quartz实现的，可以说是中小型公司必选，当然也视自身需求而定。

• 分布式任务 XXL-JOB，是一个轻量级分布式任务调度框架，支持通过 Web 页面对任务进行 CRUD 操作，支持动态修改任务状态、暂停/恢复任务，以及终止运行中任务，支持在线配置调度任务入参和在线查看调度结果。

• 分布式任务 Elastic-Job，是一个分布式调度解决方案，由两个相互独立的子项目 Elastic-Job-Lite 和 Elastic-Job-Cloud 组成。定位为轻量级无中心化解决方案，使用 jar 包的形式提供分布式任务的协调服务。支持分布式调度协调、弹性扩容缩容、失效转移、错过执行作业重触发、并行调度、自诊。

• 分布式任务 Saturn，Saturn是唯品会在github开源的一款分布式任务调度产品。它是基于当当elastic-job来开发的，其上完善了一些功能和添加了一些新的feature。目前在github上开源大半年，470个star。Saturn的任务可以用多种语言开发比如python、Go、Shell、Java、Php。其在唯品会内部已经发部署350+个节点，每天任务调度4000多万次。同时，管理和统计也是它的亮点。

SpringBoot项目的实现方法

1.config配置

import org.quartz.Scheduler;
import org.quartz.ee.servlet.QuartzInitializerListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.PropertiesFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.scheduling.quartz.SchedulerFactoryBean;

import java.io.IOException;
import java.util.Properties;

/**
 * quartz配置
 */
@Configuration
public class SchedulerConfig {
	
    @Bean(name="SchedulerFactory")
    public SchedulerFactoryBean schedulerFactoryBean() throws IOException {
        SchedulerFactoryBean factory = new SchedulerFactoryBean();
        factory.setAutoStartup(true);
        //factory.setStartupDelay(5);//延时5秒启动
        return factory;
    }

    /*
     * quartz初始化监听器
     */
    @Bean
    public QuartzInitializerListener executorListener() {
       return new QuartzInitializerListener();
    }

    /*
     * 通过SchedulerFactoryBean获取Scheduler的实例
     */
    @Bean(name="Scheduler")
    public Scheduler scheduler() throws IOException {
        return schedulerFactoryBean().getScheduler();
    }

}

2.实现方法

    /**
     * 新建任务
     * **/
    @ApiOperation(value = "Test-add", notes = "Test-add")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "cruiseId", value = "巡航线id", required = true, paramType = "path"),
            @ApiImplicitParam(name = "jobName", value = "任务名称", required = true, paramType = "query"),
            @ApiImplicitParam(name = "jobGroup", value = "任务分组", required = true, paramType = "query"),
            @ApiImplicitParam(name = "executeDate", value = "当前时间[yyyy-MM-dd HH:mm:ss]", required = true, paramType = "query", dataType = "Date")})
    @PutMapping("/test/add/{cruiseId}")
    public ResultBody test(@PathVariable("cruiseId") String cruiseId,@RequestParam("jobName") String jobName,@RequestParam("jobGroup") String jobGroup,
                           @RequestParam(value = "executeDate")@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") Date executeDate) {
        try {
            SimpleDateFormat dateFormat1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            //构建job信息
            JobDetail job = JobBuilder.newJob(CruisePlanJob.class).withIdentity(jobName, jobGroup)
                            .withDescription("巡航计划").build();
            JobDataMap jobDataMap = job.getJobDataMap();
            jobDataMap.put("cruiseId", cruiseId);
            //CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule("cron的表达式");
            Trigger trigger = TriggerBuilder.newTrigger()
                    .withIdentity("trigger" + jobName, jobGroup)
                    .startAt(executeDate)
                    .withSchedule(SimpleScheduleBuilder.simpleSchedule().withRepeatCount(0))
                    .build();
            //SimpleScheduleBuilder.simpleSchedule().withRepeatCount(0).withIntervalInSeconds(20)//每隔多少秒执行一次； withRepeatCount 设置重复的次数
            //.startNow().withSchedule(cronScheduleBuilder)
            //交由Scheduler安排触发
            scheduler.scheduleJob(job, trigger);
            System.out.println("startJob:"+JobKey.jobKey(jobName));
        } catch (Exception e) {
            e.printStackTrace();
            return ResultBody.failed();
        }
        return ResultBody.ok();
    }

    /**
     * 删除任务
     * **/
    @ApiOperation(value = "Test-remove", notes = "Test-remove")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "jobName", value = "任务名称", required = true, paramType = "query"),
            @ApiImplicitParam(name = "jobGroup", value = "任务分组", required = true, paramType = "query")})
    @GetMapping("/test/remove")
    public ResultBody remove(@RequestParam("jobName") String jobName,@RequestParam("jobGroup") String jobGroup) {
        try {
            TriggerKey triggerKey = TriggerKey.triggerKey(jobName, jobGroup);
            // 停止触发器
            scheduler.pauseTrigger(triggerKey);
            // 移除触发器
            scheduler.unscheduleJob(triggerKey);
            // 删除任务
            boolean result = scheduler.deleteJob(JobKey.jobKey(jobName, jobGroup));
            System.out.println(result);
            System.out.println("removeJob:"+JobKey.jobKey(jobName));
        } catch (Exception e) {
            e.printStackTrace();
            return ResultBody.failed();
        }
        return ResultBody.ok();
    }

3.CruisePlanJob类实现具体逻辑

@Slf4j
public class CruisePlanJob implements Job {

  @Override
  public void execute(JobExecutionContext context) {
    try{
      JobDataMap jdMap = context.getJobDetail().getJobDataMap();
      String cruiseId = (String) jdMap.get("cruiseId");
      String panId = (String) jdMap.get("panId");
      String userId = (String) jdMap.get("userId");
      String appId = (String) jdMap.get("appId");
      //TODO 逻辑待补充

      log.info("cruisePlan-CruisePlanJob-计划执行开始===>panId:{}---cruiseId:{}---appId:{}---userId:{}---resultBody:{}", panId, cruiseId,  appId,  userId, resultBody);
    }catch (Exception e){
      e.printStackTrace();
    }
  }

}

4.另外两种任务的方法

//恢复任务  
scheduler.resumeJob(key);
//停止任务
scheduler.pauseJob(key);