spring-task定時任務動態配置修改執行時間
因項目需要,幾個定時任務需要人為動態設置執行時間,于是乎吧,就查閱相關資料,是可以動態設置的,廢話不多說,直接上代碼,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 { //時間表達式 每2秒執行一次 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() { //任務邏輯 System.out.println( "---------------start-------------------" ); System.out.println( "動態修改定時任務參數,時間表達式cron為:" + cron); System.out.println( "當前時間為:" + 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; } } |
這個是定時任務調度執行器,采用的是注解的方式。首先要動態配置,要設置為@EnableScheduling,這是確保能夠動態,然后實現SchedulingConfigurer,重寫configureTasks方法,接下來就是這個的相關spring配置文件,要引入下面這個task,不然識別不了啊,配置文件就是這么簡單
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 > |
接下來就是寫測試類,測試可不可行啊
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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(); } } } |
運行測試類,查看結果,達到效果,親測可用
spring schedule 動態配置執行時間
之前saas平臺實現動態修改定時任務的時間,都是通過xx-job這樣的框架來實現,這樣我們可以單獨一個服務來管理我們整個saas平臺的定時任務,但是最近給銀行做的一個小項目,需要本地化部署,所以我不想弄很多的服務,并且他們并沒有要求修改以后即時生效,所以我直接采用了 spring schedule結合mysql動態配置執行時間。
之前我們用的schedule通過注解的方式,只能用靜態的corn表達式,如果想實現動態的需要實現SchedulingConfigurer,并且通過注解@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 * * * * ?" ; //從數據庫獲得配置的corn表達式 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() { // 任務邏輯 log.info( "task_task_tak" ); } }, new Trigger() { @Override public Date nextExecutionTime(TriggerContext triggerContext) { String s = SpringDynamicCronTask(); // 任務觸發,可修改任務的執行周期 CronTrigger trigger = new CronTrigger(s); Date nextExec = trigger.nextExecutionTime(triggerContext); return nextExec; } }); } } |
這樣我們就可以動態的修改task的執行時間,生效時間為,上一個任務的執行周期,也可以滿足我們現在需求,這樣就可以實習項目更加的靈活!
以上為個人經驗,希望能給大家一個參考,也希望大家多多支持服務器之家。
原文鏈接:https://blog.csdn.net/ll840768874/article/details/78507286