5
我使用Spring 4.2.3 AsyncRestTemplate.exchange()調用一些API,將採取幾秒鐘,我期待的是listenableFuture.get(1,TimeUnit.SECONDS)將塊1秒,然後拋出TimeOutException。阻斷對ListenableFuture與超時
代替會發生什麼情況是,listenableFuture.get()將API調用的整個時間(超過1秒)塊
AsyncRestTemplate restTemplate = new AsyncRestTemplate();
ListenableFuture<ResponseEntity<String>> listenableFuture = restTemplate.exchange(URL, HttpMethod.GET, null, String.class);
log.debug("before callback");
//...add callbacks
try{
log.debug("before blocking");
listenableFuture.get(1, TimeUnit.SECONDS);
}catch (InterruptedException e) {
log.error(":GOT InterruptedException");
} catch (ExecutionException e) {
log.error(":GOT ExecutionException");
} catch (TimeoutException e) {
log.info(":GOT TimeoutException");
}
log.info("FINISHED");
輸出:
09:15:21.596 DEBUG [main] org.springframework.web.client.AsyncRestTemplate:78 - Created asynchronous GET request for "http://localhost:4567/oia/wait?seconds=5"
09:15:21.666 DEBUG [main] org.springframework.web.client.RestTemplate:720 - Setting request Accept header to [text/plain, application/xml, text/xml, application/json, application/*+xml, application/*+json, */*]
09:15:21.679 DEBUG [main] com.zazma.flow.utils.FutureTest:74 - before callback
09:15:21.679 DEBUG [main] com.zazma.flow.utils.FutureTest:95 - before blocking
09:15:26.709 DEBUG [main] org.springframework.web.client.AsyncRestTemplate:576 - Async GET request for "http://localhost:4567/oia/wait?seconds=5" resulted in 200 (OK)
09:15:26.711 DEBUG [main] org.springframework.web.client.RestTemplate:101 - Reading [java.lang.String] as "text/html;charset=utf-8" using [[email protected]44431a]
09:15:26.717 INFO [main] com.zazma.flow.utils.FutureTest:105 - FINISHED
下面是一個例子ListenableFuture.get()將在未由AsyncRestTemplate創建時按預期工作
SimpleAsyncTaskExecutor te = new SimpleAsyncTaskExecutor();
ListenableFuture<String> lf = te.submitListenable(() -> {
Thread.sleep(8000);
return "OK";
});
lf.get(1, TimeUnit.SECONDS);
爲什麼它說:「等待?秒= 5」在日誌中的第5行的網址是什麼? –
@vstromcoder我創建的本地的API,讓X作爲號碼並等待X秒鐘,然後返回OK。所以我傳遞給交易所的網址是API。這就是爲什麼我試圖在API完成之前等待1秒(5秒後) – Yoni