[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);
});
});
}
}
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