SpringBoot2線程池定義使用方法解析

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

  @Bean
  public ThreadPoolTaskExecutor asyncServiceExecutor() {
    //返回可用處理器的虛擬機(jī)的最大數(shù)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(shù)
    executor.setCorePoolSize(cpu);
    //配置最大線程數(shù)
    executor.setMaxPoolSize(cpu);
    //配置隊(duì)列大小
    executor.setQueueCapacity(50);
    //用來(lái)設(shè)置線程池關(guān)閉的時(shí)候等待所有任務(wù)都完成再繼續(xù)銷毀其他的Bean
    executor.setWaitForTasksToCompleteOnShutdown(true);
    //設(shè)置線程池中任務(wù)的等待時(shí)間，如果超過(guò)這個(gè)時(shí)候還沒(méi)有銷毀就強(qiáng)制銷毀，以確保應(yīng)用最后能夠被關(guān)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(dāng)pool已經(jīng)達(dá)到max size的時(shí)候，如何處理新任務(wù)
    // CALLER_RUNS：不在新線程中執(zhí)行任務(wù)，而是有調(diào)用者所在的線程來(lái)執(zhí)行
    // 使用預(yù)定義的異常處理類
    executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
    //執(zhí)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);
}