6:22 a.m.
Hi!
We want to use undertow as the http server for our application. Our current API is based
on futures (java8 completable futures). My question is how do i combine futures with the
concept of handlers. My rather naive implementation would be something like that.
class MyHandler implements HttpHandler {
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
exchange.getRequestReceiver().receiveFullString((exchange1, message) -> {
CompletableFuture<Response> responseFuture = doTheWork(message);
exchange1.dispatch();
responseFuture.whenCompleteAsync((response, throwable) -> {
exchange1.getResponseSender().send(response);
});
});
}
}
does this look reasonable? responseFuture.whenCompleteAsync() can be passed an Executor.
Should i use an Executor from the HttpServerExchange for that? actually i tried to, but
it’s always null. Another way would be:
class MyHandler implements HttpHandler {
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
exchange.getRequestReceiver().receiveFullString((exchange1, message) -> {
CompletableFuture<Response> responseFuture = doTheWork(message);
exchange1.dispatch(() -> {
exchange1.getResponseSender().send(responseFuture.get());
});
});
}
}
What’s the correct way to do it?
Thanks, Sascha
7:32 p.m.
----- Original Message -----
From: "Sascha Sadat-Guscheh" <kid(a)bitkid.com>
To: undertow-dev(a)lists.jboss.org
Sent: Thursday, 10 December, 2015 9:22:38 PM
Subject: [undertow-dev] how to use futures with undertow?
Hi!
We want to use undertow as the http server for our application. Our current
API is based on futures (java8 completable futures). My question is how do i
combine futures with the concept of handlers. My rather naive implementation
would be something like that.
class MyHandler implements HttpHandler {
@Override
public void handleRequest(HttpServerExchange exchange) throws
Exception {
exchange.getRequestReceiver().receiveFullString((exchange1,
message) -> {
CompletableFuture<Response> responseFuture =
doTheWork(message);
exchange1.dispatch();
responseFuture.whenCompleteAsync((response, throwable) -> {
exchange1.getResponseSender().send(response);
});
});
}
}
This looks reasonable. If you want to use an Executor you can use either:
exchange.getIoThread() (to execute in the IO thread, this should be fine for you example)
exchange.getConnection.getWorker() (to execute blocking tasks)
Stuart
does this look reasonable? responseFuture.whenCompleteAsync() can be passed
an Executor. Should i use an Executor from the HttpServerExchange for that?
actually i tried to, but it’s always null. Another way would be:
class MyHandler implements HttpHandler {
@Override
public void handleRequest(HttpServerExchange exchange) throws
Exception {
exchange.getRequestReceiver().receiveFullString((exchange1,
message) -> {
CompletableFuture<Response> responseFuture =
doTheWork(message);
exchange1.dispatch(() -> {
exchange1.getResponseSender().send(responseFuture.get());
});
});
}
}
This will block the thread until the future is ready, the
What’s the correct way to do it?
Thanks, Sascha
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undertow-dev mailing list
undertow-dev(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/undertow-dev
6:11 a.m.
Hi Stuart!
Thanks for your response. I already figured that the idea to wait for the future is
probably not the best one ;-)
exchange.getIoThread()
that was what i was looking for.
Merci, Sascha
On 14 Dec 2015, at 02:32, Stuart Douglas <sdouglas(a)redhat.com>
wrote:
----- Original Message -----
> From: "Sascha Sadat-Guscheh" <kid(a)bitkid.com>
> To: undertow-dev(a)lists.jboss.org
> Sent: Thursday, 10 December, 2015 9:22:38 PM
> Subject: [undertow-dev] how to use futures with undertow?
>
> Hi!
>
> We want to use undertow as the http server for our application. Our current
> API is based on futures (java8 completable futures). My question is how do i
> combine futures with the concept of handlers. My rather naive implementation
> would be something like that.
>
> class MyHandler implements HttpHandler {
> @Override
> public void handleRequest(HttpServerExchange exchange) throws
> Exception {
> exchange.getRequestReceiver().receiveFullString((exchange1,
> message) -> {
> CompletableFuture<Response> responseFuture =
> doTheWork(message);
> exchange1.dispatch();
> responseFuture.whenCompleteAsync((response, throwable) -> {
> exchange1.getResponseSender().send(response);
> });
> });
> }
> }
This looks reasonable. If you want to use an Executor you can use either:
exchange.getIoThread() (to execute in the IO thread, this should be fine for you
example)
exchange.getConnection.getWorker() (to execute blocking tasks)
Stuart
>
> does this look reasonable? responseFuture.whenCompleteAsync() can be passed
> an Executor. Should i use an Executor from the HttpServerExchange for that?
> actually i tried to, but it’s always null. Another way would be:
>
> class MyHandler implements HttpHandler {
> @Override
> public void handleRequest(HttpServerExchange exchange) throws
> Exception {
> exchange.getRequestReceiver().receiveFullString((exchange1,
> message) -> {
> CompletableFuture<Response> responseFuture =
> doTheWork(message);
> exchange1.dispatch(() -> {
> exchange1.getResponseSender().send(responseFuture.get());
> });
> });
> }
> }
This will block the thread until the future is ready, the
>
> What’s the correct way to do it?
>
> Thanks, Sascha
> _______________________________________________
> undertow-dev mailing list
> undertow-dev(a)lists.jboss.org <mailto:undertow-dev@lists.jboss.org>
> https://lists.jboss.org/mailman/listinfo/undertow-dev
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participants (2)
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Sascha Sadat-Guscheh -
Stuart Douglas