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目录使用@Scheduled读取动态参数1、基于@Scheduled可配置开发2、基于代码实现Spring Boot Scheduled动态配置使用@Scheduled读取动态参数
application.propertites:
read.timer.parmas=0 0/1 * * * *
定时类:
@Component
public class ScheduledService {
Logger logger= LoggerFactory.getLogger(ScheduledService.class);
@Scheduled(cron = "${read.timer.parmas}")
public void readConfigTable(){
logger.info("*****.read.timer.parmas");
}
}
启动类:
@SpringBootApplication
@EnableScheduling //必须
public class DataApplication {
public static void main(String[] args) {
springApplication.run(DataApplication.class,args);
}
}
(1)核心代码
@Component
@EnableScheduling
public 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
TestScheduledParams.corn="0/20 * * * * *"
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
@Log4j2
public 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编程网。
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本文标题: SpringBoot项目中使用@Scheduled读取动态参数
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