@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)); } }
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