一、问题
项目采用springboot搭建,想给方法添加@Scheduled注解,实现两个定时任务。可是运行发现,两个task并没有并发执行,而是执行完一个task才会执行另外一个。上代码:
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package com.autohome.contentplatform.tasks;
import org.springframework.beans.factory.annotation.Configurable;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
@Component @Configurable @EnableScheduling public class task1 {
@Scheduled (cron = "0/5 * * * * ? " )
public void startSchedule() {
System.out.println( "===========1=>" );
try {
for ( int i= 1 ;i<= 10 ;i++){
System.out.println( "=1==>" +i);
Thread.sleep( 1000 );
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
@Scheduled (cron = "0/5 * * * * ? " )
public void startSchedule2() {
for ( int i= 1 ;i<= 10 ;i++){
System.out.println( "=2==>" +i);
try {
Thread.sleep( 1000 );
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
} |
运行发现任务没有并行执行。
二、解决
给类添加注解@EnableAsync,并给方法添加注解@Async。
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@Component @Configurable @EnableScheduling @EnableAsync public class DemoTask {
@Async
@Scheduled (cron = "0/5 * * * * ? " )
public void startSchedule() {
System.out.println( "===========1=>" );
try {
for ( int i= 1 ;i<= 10 ;i++){
System.out.println( "=1==>" +i);
Thread.sleep( 1000 );
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
@Async
@Scheduled (cron = "0/5 * * * * ? " )
public void startSchedule2() {
for ( int i= 1 ;i<= 10 ;i++){
System.out.println( "=2==>" +i);
try {
Thread.sleep( 1000 );
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
} |
再次运行,发现两个任务可以并发执行了。
三、参考资料:
https://docs.spring.io/spring/docs/3.2.x/spring-framework-reference/html/scheduling.html
本文转自 陈敬(Cathy) 博客园博客,原文链接:http://www.cnblogs.com/janes/p/8085654.html,如需转载请自行联系原作者