SchedulingConfigurer配置定时任务不起作用

@schedule 注解 是springboot 常用的定时任务注解,使用起来简单方便,但是如果定时任务非常多,或者有的任务很耗时,会影响到其他定时任务的执行,因为schedule 默认是单线程的,一个任务在执行时,其他任务是不能执行的.解决办法是重新配置schedule,改为多线程执行.只需要增加下面的配置类就可以了.

import org.springframework.boot.autoconfigure.batch.BatchProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import java.lang.reflect.Method;
import java.util.concurrent.Executors;
@Configuration
public class ScheduleConfig implements SchedulingConfigurer {
  @Override
  public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
    Method[] methods = BatchProperties.Job.class.getMethods();
    int defaultPoolSize = 3;
    int corePoolSize = 0;
    if (methods != null && methods.length > 0) {
      for (Method method : methods) {
        Scheduled annotation = method.getAnnotation(Scheduled.class);
        if (annotation != null) {
          corePoolSize++;
        }
      }
      if (defaultPoolSize > corePoolSize)
        corePoolSize = defaultPoolSize;
    }
    taskRegistrar.setScheduler(Executors.newScheduledThreadPool(corePoolSize));
  }
}

源码  https://github.com/Yanyf765/demo_schedule

转自：脚本之家https://www.jb51.net/article/169396.htm