spring-task定時(shí)任務(wù)動(dòng)態(tài)配置修改執(zhí)行時(shí)間
因項(xiàng)目需要，幾個(gè)定時(shí)任務(wù)需要人為動(dòng)態(tài)設(shè)置執(zhí)行時(shí)間，于是乎吧，就查閱相關(guān)資料，是可以動(dòng)態(tài)設(shè)置的，廢話不多說(shuō)，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@EnableSchedulingpublic class DynamicScheduledTask implements SchedulingConfigurer { //時(shí)間表達(dá)式 每2秒執(zhí)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(wù)邏輯 System.out.println("---------------start-------------------"); System.out.println("動(dòng)態(tài)修改定時(shí)任務(wù)參數(shù)，時(shí)間表達(dá)式cron為：" + cron); System.out.println("當(dāng)前時(shí)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(gè)是定時(shí)任務(wù)調(diào)度執(zhí)行器，采用的是注解的方式。首先要?jiǎng)討B(tài)配置，要設(shè)置為@EnableScheduling，這是確保能夠動(dòng)態(tài)，然后實(shí)現(xiàn)SchedulingConfigurer，重寫configureTasks方法，接下來(lái)就是這個(gè)的相關(guān)spring配置文件，要引入下面這個(gè)task，不然識(shí)別不了啊，配置文件就是這么簡(jiǎn)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(lái)就是寫測(cè)試類，測(cè)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(yùn)行測(cè)試類，查看結(jié)果，達(dá)到效果，親測(cè)可用
spring schedule 動(dòng)態(tài)配置執(zhí)行時(shí)間
之前saas平臺(tái)實(shí)現(xiàn)動(dòng)態(tài)修改定時(shí)任務(wù)的時(shí)間，都是通過(guò)xx-job這樣的框架來(lái)實(shí)現(xiàn)，這樣我們可以單獨(dú)一個(gè)服務(wù)來(lái)管理我們整個(gè)saas平臺(tái)的定時(shí)任務(wù)，但是最近給銀行做的一個(gè)小項(xiàng)目，需要本地化部署，所以我不想弄很多的服務(wù)，并且他們并沒(méi)有要求修改以后即時(shí)生效，所以我直接采用了 spring schedule結(jié)合mysql動(dòng)態(tài)配置執(zhí)行時(shí)間。
之前我們用的schedule通過(guò)注解的方式，只能用靜態(tài)的corn表達(dá)式，如果想實(shí)現(xiàn)動(dòng)態(tài)的需要實(shí)現(xiàn)SchedulingConfigurer，并且通過(guò)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@EnableSchedulingpublic 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(shù)據(jù)庫(kù)獲得配置的corn表達(dá)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(wù)邏輯 log.info("task_task_tak"); } }, new Trigger() { @Override public Date nextExecutionTime(TriggerContext triggerContext) { String s = SpringDynamicCronTask(); // 任務(wù)觸發(fā)，可修改任務(wù)的執(zhí)行周期 CronTrigger trigger = new CronTrigger(s); Date nextExec = trigger.nextExecutionTime(triggerContext); return nextExec; } }); }} |
這樣我們就可以動(dòng)態(tài)的修改task的執(zhí)行時(shí)間，生效時(shí)間為，上一個(gè)任務(wù)的執(zhí)行周期，也可以滿足我們現(xiàn)在需求，這樣就可以實(shí)習(xí)項(xiàng)目更加的靈活！
以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持服務(wù)器之家。
原文鏈接：https://blog.csdn.net/ll840768874/article/details/78507286
