Question

我配置了两个不同的线程池，一个用于@Scheduled，另一个用于@Async。但是，我注意到@Async的线程池没有被使用。

以下是调度程序配置

@Configuration
@EnableScheduling
public class SchedulerConfig implements SchedulingConfigurer {
    private final int POOL_SIZE = 10;

    @Override
    public void configureTasks(ScheduledTaskRegistrar scheduledTaskRegistrar) {
        ThreadPoolTaskScheduler threadPoolTaskScheduler = new ThreadPoolTaskScheduler();
        threadPoolTaskScheduler.setPoolSize(POOL_SIZE);
        threadPoolTaskScheduler.setThreadNamePrefix("my-sched-pool-");
        threadPoolTaskScheduler.initialize();
        scheduledTaskRegistrar.setTaskScheduler(threadPoolTaskScheduler);
    }
}

以下是异步配置

@Configuration
@EnableAsync
public class AppConfig {

 @Bean(name = "asyncTaskExecutor")
    public TaskExecutor asyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(15);
        executor.setMaxPoolSize(15);
        executor.setQueueCapacity(100);
        executor.setThreadNamePrefix("my-async-pool-");
        executor.initialize();
        return executor;
    }
}

以下是我如何调用它们

@Scheduled(fixedRateString = "2000" )
    public void schedule() {
      log.debug("here is the message from schedule");
      asyncMethod();
    }

@Async("asyncTaskExecutor")
public void asyncMethod(){
  log.info("here is the message from async");
}

以下是日志

{"thread":"my-sched-pool-1","level":"DEBUG","description":"here is the message from schedule"}
{"thread":"my-sched-pool-1","level":"INFO","description":"here is the message from async"}

您可以注意到，两个日志都具有该调度程序的相同池。但我希望看到第二个来自异步

Answer 1

如果从相同的@Async调用class个方法，则会声明您实际上绕过了Spring的代理机制，这就是为什么您的示例无法正常工作的原因。尝试使用class注释@Service或任何其他@Component类型的单独@Service SomeScheduledClass { private final SomeAsyncClass someAsyncClass; public SomeScheduledClass(SomeAsyncClass someAsyncClass) { this.someAsyncClass = someAsyncClass; } @Scheduled(fixedRateString = "2000" ) public void schedule() { log.debug("here is the message from schedule"); someAsyncClass.asyncMethod(); } } @Service SomeAsyncClass { @Async("asyncTaskExecutor") public void asyncMethod(){ log.info("here is the message from async"); } }来调用该方法。

class Superr {
 int k;
 int g;
 int l;

 Superr(int a, int b, int c) {
  k = a;
  g = b;
  l = c;
 }

 void show() {
  System.out.println("value of l" + l);
 }

}

class Sub extends Superr {
 int h;

 Sub(int a, int b, int c, int d) {
  e = a;
  f = b;
  g = c;
  l = d;
 }

 class Main {
  public static void main(String[] args) {
   Superr b = new Super(1, 2, 3);
   Sub c = new Sub(1, 2, 3, 4);
  }

@Scheduled和@Async在spring-boot

1 个答案: