spring-task定时任务动态配置修改执行时间
因项目需要,几个定时任务需要人为动态设置执行时间,于是乎吧,就查阅相关资料,是可以动态设置的,废话不多说,直接上代码,一目了然。
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package com.seckill.quartz; import org.springframework.scheduling.Trigger; import org.springframework.scheduling.TriggerContext; import org.springframework.scheduling.annotation.EnableScheduling; import org.springframework.scheduling.annotation.SchedulingConfigurer; import org.springframework.scheduling.config.ScheduledTaskRegistrar; import org.springframework.scheduling.support.CronTrigger; import org.springframework.stereotype.Component; import java.text.SimpleDateFormat; import java.util.Date; /** * Created by loup on 2017/11/11. */ @Component @EnableScheduling public class DynamicScheduledTask implements SchedulingConfigurer { //时间表达式 每2秒执行一次 private String cron = "0/2 * * * * ?" ; private SimpleDateFormat sdf = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" ); @Override public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) { scheduledTaskRegistrar.addTriggerTask( new Runnable() { @Override public void run() { //任务逻辑 System.out.println( "---------------start-------------------" ); System.out.println( "动态修改定时任务参数,时间表达式cron为:" + cron); System.out.println( "当前时间为:" + sdf.format( new Date())); System.out.println( "----------------end--------------------" ); } }, new Trigger() { @Override public Date nextExecutionTime(TriggerContext triggerContext) { CronTrigger cronTrigger = new CronTrigger(cron); Date nextExecDate = cronTrigger.nextExecutionTime(triggerContext); return nextExecDate; } }); } public void setCron(String cron) { this .cron = cron; } } |
这个是定时任务调度执行器,采用的是注解的方式。首先要动态配置,要设置为@EnableScheduling,这是确保能够动态,然后实现SchedulingConfigurer,重写configureTasks方法,接下来就是这个的相关spring配置文件,要引入下面这个task,不然识别不了啊,配置文件就是这么简单
http://www.springframework.org/schema/task
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<? xml version = "1.0" encoding = "UTF-8" ?> < beans xmlns = "http://www.springframework.org/schema/beans" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xmlns:task = "http://www.springframework.org/schema/task" xmlns:context = "http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> < context:component-scan base-package = "com.seckill.quartz" /> < task:annotation-driven /> </ beans > |
接下来就是写测试类,测试可不可行啊
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package com.seckill.quartz; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import java.io.IOException; /** * Created by loup on 2017/11/11. */ @RunWith (SpringJUnit4ClassRunner. class ) @ContextConfiguration ({ "classpath*:/conf/spring-quartz.xml" }) public class QuartzTest { @Autowired private DynamicScheduledTask dynamicScheduledTask; @Test public void test1(){ try { Thread.sleep( 10000 ); } catch (InterruptedException e) { e.printStackTrace(); } dynamicScheduledTask.setCron( "0/10 * * * * ?" ); try { System.in.read(); } catch (IOException e) { e.printStackTrace(); } } } |
运行测试类,查看结果,达到效果,亲测可用
spring schedule 动态配置执行时间
之前saas平台实现动态修改定时任务的时间,都是通过xx-job这样的框架来实现,这样我们可以单独一个服务来管理我们整个saas平台的定时任务,但是最近给银行做的一个小项目,需要本地化部署,所以我不想弄很多的服务,并且他们并没有要求修改以后即时生效,所以我直接采用了 spring schedule结合mysql动态配置执行时间。
之前我们用的schedule通过注解的方式,只能用静态的corn表达式,如果想实现动态的需要实现SchedulingConfigurer,并且通过注解@EnableScheduling。如下:
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package com.zqf.marketing.task; import com.zqf.db.marketingrobot.sys.model.RobotSysSwitch; import com.zqf.marketing.sys.service.SwitchService; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Lazy; import org.springframework.scheduling.Trigger; import org.springframework.scheduling.TriggerContext; import org.springframework.scheduling.annotation.EnableScheduling; import org.springframework.scheduling.annotation.SchedulingConfigurer; import org.springframework.scheduling.config.ScheduledTaskRegistrar; import org.springframework.scheduling.support.CronTrigger; import org.springframework.stereotype.Service; import java.util.Date; /** * @author zhenghao * @description * @date 2019/1/22 21:50 */ @Lazy ( false ) @Service @EnableScheduling public class TestTaskService implements SchedulingConfigurer { private static Logger log = LoggerFactory.getLogger(TestTaskService. class ); @Autowired private SwitchService switchService; private String SpringDynamicCronTask() { String cron = "0/5 * * * * ?" ; //从数据库获得配置的corn表达式 RobotSysSwitch switchById = switchService.getSwitchById(5L); cron = switchById.getSwitchFlag(); log.info(cron); return cron; } @Override public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) { scheduledTaskRegistrar.addTriggerTask( new Runnable() { @Override public void run() { // 任务逻辑 log.info( "task_task_tak" ); } }, new Trigger() { @Override public Date nextExecutionTime(TriggerContext triggerContext) { String s = SpringDynamicCronTask(); // 任务触发,可修改任务的执行周期 CronTrigger trigger = new CronTrigger(s); Date nextExec = trigger.nextExecutionTime(triggerContext); return nextExec; } }); } } |
这样我们就可以动态的修改task的执行时间,生效时间为,上一个任务的执行周期,也可以满足我们现在需求,这样就可以实习项目更加的灵活!
以上为个人经验,希望能给大家一个参考,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/ll840768874/article/details/78507286