[undertow-dev] Using Async Api inside HttpHandler

Hello Team, I there way to execute some code asynchronously in handler and fill response in callback? I started with straightforward code like: HttpHandler asyncHandler = (HttpServerExchange exchange) -> { client.execute(new HttpGet("https://newton.now.sh/"), new FutureCallback<HttpResponse>() { @Override public void completed(HttpResponse result) { System.out.println("Received."); exchange.getResponseSender().send("Received."); } @Override public void failed(Exception ex) { System.out.println("Failed."); exchange.getResponseSender().send("Failed."); } @Override public void cancelled() { System.out.println("Cancelled."); exchange.getResponseSender().send("Cancelled."); } }); }; When I run this code *completed* method called, but nothing written in response (since exchange already end) So I googled my question and found SO answer, and I tried to dispatch exchange as described here: https://stackoverflow.com/a/25223070/1538877 With no luck too. Then I go to Request Lifecycle section of the docs (minor typo fix here: https://github.com/undertow-io/undertow-docs/pull/9) http://undertow.io/undertow-docs/undertow-docs-1.4.0/index.html#undertow-... and tried approach with dispatching current handler with no luck too. (But found that HttpHandlers class renamed too Connectors, fix: https://github.com/undertow-io/undertow-docs/pull/8) So my question is how to do async tasks in handlers. My attempts as single file: https://gist.github.com/IRus/de8a23396ccd6b59df9267d4124393db (requires http://mvnrepository.com/artifact/org.apache.httpcomponents/httpasyncclie... ) -- Best regards, Ibragimov Ruslan http://ibragimov.by/ http://heap.by/