Spring的异步线程处理

Spring封装了JDK的线程池和线程调用，并使用标签就可以开启多线程调用。

先进行一个Spring的线程池配置

@Configuration @EnableAsync public class ThreadPoolConfig implements AsyncConfigurer { @Bean @Override public Executor getAsyncExecutor() { ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor(); executor.setCorePoolSize(Runtime.getRuntime().availableProcessors()); executor.setMaxPoolSize(Runtime.getRuntime().availableProcessors() * 5); executor.setQueueCapacity(Runtime.getRuntime().availableProcessors() * 2); executor.setThreadNamePrefix("this-executor-"); executor.initialize(); return executor; }

@Bean

@Override public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() { return new SimpleAsyncUncaughtExceptionHandler(); } }

再编写一个Service的异步方法调用，这里是带返回值的，不带返回值的方法比较简单，这里就不举例了。

@Service @Slf4j public class ThreadTasks { _/** _ * 如果异步方法有返回值，一定要使用Future包装，否则无法返回 * _@return _ * @throws _InterruptedException _ */ @Async public Future<String> startTask() throws InterruptedException { Thread.sleep(3000); log.info("this is async task"); return new AsyncResult<>("123456"); } }

最后写一个Controller,对该异步方法进行调用

@RestController public class AsyncTaskController { @Autowired private ThreadTasks tasks; @GetMapping("/users-anon/useTask") public String useSyncTask() throws InterruptedException, ExecutionException { Future<String> future = tasks.startTask(); return future.get(); } }

最后运行下来，我们可以看到每次都是不同的线程执行

12020-09-21 16:33:53.027  INFO [user-center,3e635fca3d1259da,d30e8b6372922137,false] 1126 --- [this-executor-1] com.cloud.user.service.ThreadTasks       : this is async task
22020-09-21 16:35:27.664  INFO [user-center,9b68efbb2c848d7b,895ed921f6c8fe03,false] 1126 --- [this-executor-2] com.cloud.user.service.ThreadTasks       : this is async task