使用@Scheduled读取动态参数
1、基于@Scheduled可配置开发
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application.propertites： read.timer.parmas=0 0/1 * * * * |
定时类：
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@Componentpublic class ScheduledService {Logger logger= LoggerFactory.getLogger(ScheduledService.class); @Scheduled(cron = "${read.timer.parmas}") public void readConfigTable(){ logger.info("*****.read.timer.parmas"); }} |
启动类：
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@SpringBootApplication@EnableScheduling //必须public class DataApplication { public static void main(String[] args) { SpringApplication.run(DataApplication.class,args); }} |
2、基于代码实现
（1）核心代码
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@Component@EnableSchedulingpublic class TestScheduledParams implements SchedulingConfigurer{ Logger logger= LoggerFactory.getLogger(TestScheduledParams.class); public static String DEFAULT_CORN="0/3 * * * * *"; //##动态传参要给默认值。 public static String corn=DEFAULT_CORN; @Override public void configureTasks(ScheduledTaskRegistrar taskRegistrar) { taskRegistrar.addTriggerTask(new Runnable() { @Override public void run() { // logger.info("定时任务逻辑"); } }, new Trigger() { @Override public Date nextExecutionTime(TriggerContext triggerContext) { //任务触发，可修改任务的执行周期 CronTrigger cronTrigger = new CronTrigger(corn); Date date = cronTrigger.nextExecutionTime(triggerContext); return date; } }); }} |
（2）其他类或方法动态传参赋值
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TestScheduledParams.corn="0/20 * * * * *" |
spring boot Scheduled动态配置
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package cn.com.suntree.cmp.service;import cn.com.suntree.cmp.utils.CommonUtil;import lombok.extern.log4j.Log4j2;import org.apache.commons.lang3.StringUtils;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.scheduling.Trigger;import org.springframework.scheduling.TriggerContext;import org.springframework.scheduling.annotation.SchedulingConfigurer;import org.springframework.scheduling.config.ScheduledTaskRegistrar;import org.springframework.scheduling.support.CronTrigger;import org.springframework.stereotype.Component;import redis.clients.jedis.Jedis;import java.util.Date;@Component@Log4j2public class MyDynamicTask implements SchedulingConfigurer {//实现SchedulingConfigurer 接口 @Autowired CommonUtil commonUtil; @Autowired TaskService taskService; private static String cron; @Override public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {//重写该方法 scheduledTaskRegistrar.addTriggerTask(doTask(), getTrigger()); } private Runnable doTask() { return new Runnable() { @Override public void run() { log.info("-------------------------------执行"+cron); taskService.monDay();//真正需要运行的逻辑代码 } }; } private Trigger getTrigger() { return new Trigger() { @Override public Date nextExecutionTime(TriggerContext triggerContext) { // 触发器 CronTrigger trigger = new CronTrigger(getCron()); return trigger.nextExecutionTime(triggerContext); } }; } public String getCron() { Jedis jedis = commonUtil.getJedis(); String newCron = jedis.get("cron");//可以改成配置到数据库中 if (StringUtils.isEmpty(newCron)) { jedis.set("cron","0 30 0 ? * Mon"); return "0 30 0 ? * Mon"; } if (!newCron.equals(cron)) { log.info(new StringBuffer("Cron has been changed to:'").append(newCron).append("'. Old cron was:'").append(cron).append("'").toString()); cron = newCron; } return cron; }} |
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/hyj_king/article/details/98874541
