java – 从异步休息模板spring返回值
发布时间:2020-12-15 04:39:20 所属栏目:Java 来源:网络整理
导读:我正在使用 spring创建一个异步休息调用 @GetMapping(path = "/testingAsync")public String value() throws ExecutionException,InterruptedException,TimeoutException { AsyncRestTemplate restTemplate = new AsyncRestTemplate(); String baseUrl = "ht
我正在使用
spring创建一个异步休息调用
@GetMapping(path = "/testingAsync") public String value() throws ExecutionException,InterruptedException,TimeoutException { AsyncRestTemplate restTemplate = new AsyncRestTemplate(); String baseUrl = "https://api.github.com/users/XXX"; HttpHeaders requestHeaders = new HttpHeaders(); requestHeaders.setAccept(Arrays.asList(MediaType.APPLICATION_JSON)); String value = ""; HttpEntity entity = new HttpEntity("parameters",requestHeaders); ListenableFuture<ResponseEntity<User>> futureEntity = restTemplate.getForEntity(baseUrl,User.class); futureEntity.addCallback(new ListenableFutureCallback<ResponseEntity<User>>() { @Override public void onSuccess(ResponseEntity<User> result) { System.out.println(result.getBody().getName()); // instead of this how can i return the value to the user ? } @Override public void onFailure(Throwable ex) { } }); return "DONE"; // instead of done i want to return value to the user comming from the rest call } 有没有什么办法可以将ListenableFuture转换为使用java 8中使用的CompletableFuture? 解决方法
你基本上可以做两件事.
>删除ListenableFutureCallback并返回ListenableFuture 返回ListenableFuture @GetMapping(path = "/testingAsync") public ListenableFuture<ResponseEntity<User>> value() throws ExecutionException,requestHeaders); return restTemplate.getForEntity(baseUrl,User.class); } Spring MVC将添加一个ListenableFutureCallback本身来填充DeferredResult,最终你会得到一个User. 使用DeferredResult 如果您想要更多地控制返回的内容,可以使用DeferredResult并自己设置值. @GetMapping(path = "/testingAsync") public DeferredResult<String> value() throws ExecutionException,requestHeaders); final DeferredResult<String> result = new DeferredResult<>(); ListenableFuture<ResponseEntity<User>> futureEntity = restTemplate.getForEntity(baseUrl,User.class); futureEntity.addCallback(new ListenableFutureCallback<ResponseEntity<User>>() { @Override public void onSuccess(ResponseEntity<User> result) { System.out.println(result.getBody().getName()); result.setResult(result.getBody().getName()); } @Override public void onFailure(Throwable ex) { result.setErrorResult(ex.getMessage()); } }); return result; } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |