小编给大家分享一下如何使用spring-task定时任务动态配置修改执行时间,希望大家阅读完这篇文章之后都有所收获,下面让我们一起去探讨吧!
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。
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; @Component@EnableSchedulingpublic 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
<?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
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; @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:
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; @Lazy(false)@Service@EnableSchedulingpublic 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; } }); }}
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