SpringBoot动态管理定时任务
首先使用@EnableScheduling 开启定时任务
package com.fighting;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
@SpringBootApplication
@EnableScheduling
public class ScheduledApplication {
public static void main(String[] args) {
SpringApplication.run(ScheduledApplication.class, args);
}
}配置日志级别
logging.level.com= debug logging.file=springboot-scheduled.log
固定周期定时任务
package com.fighting;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
/**
* Spring静态周期定时任务
*
* @author fighting
* @date 2018-09-11
*/
@Component
public class SpringStaticCronTask {
public static final Logger logger = LoggerFactory.getLogger(SpringStaticCronTask.class);
@Scheduled(cron = "0/5 * * * * ?")
public void staticCornTask() {
logger.debug("staticCronTask is running...");
}
}动态修改定时周期
实现SchedulingConfigurer 接口，重写 configureTasks方法
package com.fighting;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;
/**
* 动态定时任务
*
* @author fighting
* @date 2018-09-11
*/
@Component
public class SpringDynamicCronTask implements SchedulingConfigurer {
private static final Logger logger = LoggerFactory.getLogger(SpringDynamicCronTask.class);
private static String cron = "0/5 * * * * ?";
@Override
public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
scheduledTaskRegistrar.addTriggerTask(() -> {
// 任务逻辑
logger.error("dynamicCronTask is running...");
}, triggerContext -> {
// 任务触发，在这里可修改任务的执行周期,因为每次调度都会执行这里
CronTrigger cronTrigger = new CronTrigger(cron);
return cronTrigger.nextExecutionTime(triggerContext);
});
}
public SpringDynamicCronTask() {
//模拟业务修改周期,可以在具体业务中修改参数cron
new Thread(() -> {
try {
Thread.sleep(15000);
} catch (InterruptedException e) {
e.printStackTrace();
}
cron = "0/2 * * * * ?";
}).start();
}
}观察打印结果，周期变了，但是项目没有重启。
2018-09-11 13:36:50.009 DEBUG 16708 --- [pool-1-thread-1] com.fighting.SpringStaticCronTask : staticCronTask is running... 2018-09-11 13:36:50.010 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running... 2018-09-11 13:36:55.001 DEBUG 16708 --- [pool-1-thread-1] com.fighting.SpringStaticCronTask : staticCronTask is running... 2018-09-11 13:36:55.002 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running... 2018-09-11 13:37:00.009 DEBUG 16708 --- [pool-1-thread-1] com.fighting.SpringStaticCronTask : staticCronTask is running... 2018-09-11 13:37:00.016 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running... 2018-09-11 13:37:05.016 DEBUG 16708 --- [pool-1-thread-1] com.fighting.SpringStaticCronTask : staticCronTask is running... 2018-09-11 13:37:05.016 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running... 2018-09-11 13:37:06.013 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running... 2018-09-11 13:37:08.008 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running... 2018-09-11 13:37:10.002 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running... 2018-09-11 13:37:10.003 DEBUG 16708 --- [pool-1-thread-1] com.fighting.SpringStaticCronTask : staticCronTask is running... 2018-09-11 13:37:12.002 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running... 2018-09-11 13:37:14.006 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running... 2018-09-11 13:37:15.015 DEBUG 16708 --- [pool-1-thread-1] com.fighting.SpringStaticCronTask : staticCronTask is running... 2018-09-11 13:37:16.012 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running... 2018-09-11 13:37:18.002 ERROR 16708 --- [pool-1-thread-1] com.fighting.SpringDynamicCronTask : dynamicCronTask is running...
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