@Slf4j
@EnableAsync
@Configuration
public class AsyncExecutorConfig implements AsyncConfigurer {

  @Bean
  public ThreadPoolTaskExecutor asyncServiceExecutor() {
    //返回可用處理器的虛擬機的最大數量不小于1
    int cpu = Runtime.getRuntime().availableProcessors();
    log.info("start asyncServiceExecutor cpu : {}", cpu);
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    //配置核心線程數
    executor.setCorePoolSize(cpu);
    //配置最大線程數
    executor.setMaxPoolSize(cpu);
    //配置隊列大小
    executor.setQueueCapacity(50);
    //用來設置線程池關閉的時候等待所有任務都完成再繼續銷毀其他的Bean
    executor.setWaitForTasksToCompleteOnShutdown(true);
    //設置線程池中任務的等待時間，如果超過這個時候還沒有銷毀就強制銷毀，以確保應用最后能夠被關閉，而不是阻塞住
    executor.setAwaitTerminationSeconds(60);
    //配置線程池中的線程的名稱前綴
    executor.setThreadNamePrefix("async-service-");
    // rejection-policy：當pool已經達到max size的時候，如何處理新任務
    // CALLER_RUNS：不在新線程中執行任務，而是有調用者所在的線程來執行
    // 使用預定義的異常處理類
    executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
    //執行初始化
    executor.initialize();
    return executor;
  }

  @Override
  public Executor getAsyncExecutor() {
    return asyncServiceExecutor();
  }

  @Override
  public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
    return (throwable, method, objects) -> {
      StringBuilder sb = new StringBuilder();
      for (Object param : objects) {
        sb.append(param).append(",");
      }
      log.error("Exception message - {}，Method name - {}，Parameter value - {}", throwable.getMessage(), method.getName(), sb.toString());
    };

  }
}

@Autowired  
private ThreadPoolTaskExecutor threadPoolTaskExecutor;

public void test(){
 CompletableFuture<Void> userFuture = CompletableFuture.runAsync(() -> System.out.println(111), threadPoolTaskExecutor);
}