JAX-RS 2.1 Reactive Client - Async HTTPClient

[Paul Carter-Brown]

Hi,

I'm using TomEE 8 with CXF and have not been able to get the rx() client
pattern with CompletionStage to utilise the Apache non-blocking HTTP
Client. With the old .async() pattern and Futures it does use the async
client

I've created a simple app outside of TomEE and have the same behavior. Here
is a basic example:

        Client client = ClientBuilder.newBuilder().build();
        WebTarget target = client.target("http://www.simplesite.com/";);
        Invocation.Builder builder = target.request();
        // THIS CALL USES sun.net.www.protocol.http.HttpURLConnection

CompletableFuture.allOf(builder.rx().get(String.class).thenAccept(res ->
System.out.println(res.length())).toCompletableFuture()).join();

        client = ClientBuilder.newBuilder().build();
        target = client.target("http://www.simplesite.com/";);
        builder = target.request();
        String res;
        try {
            // THIS CALL USES cxf-rt-transports-http-hc
            res = builder.async().get(String.class).get();
            System.out.println(res.length());
        } catch (Exception ex) {
        }

I use stack traces at runtime to see which version is being used.

Is it possible to use the non-blocking HTTP client with the reactive client?

I need this as I want to create a purely non-blocking server where the
JAX-RS server is non-blocking (I have this working) and then if the server
does client calls to subsequent external rest services then these are also
non-blocking. The combination would allow for a server that does rest
orchestration without a thread being used for every inflight request.

Thanks

Paul

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