rest 异步请求

异步请求 使用副线程处理 请求，主线程可以做其他事情，提高吞吐量

@RestController
public class AsyncController {
	private Logger logger = LoggerFactory.getLogger(getClass());
	
	@RequestMapping("/order")
	public DeferredResult<String> order() throws Exception {
		logger.info("主线程开始");
		
		Callable<String> result = new Callable<String>() {
			@Override
			public String call() throws Exception {
				logger.info("副线程开始");
				Thread.sleep(1000);
				logger.info("副线程返回");
				return "success";
			}
		};
		return result;
	}

}