How to use PATCH method in CXF Client

Question

I was trying to call a API with PATCH method using CXF (Version 3.1.3) client.

Tried following the steps specified in below threads but not able resolve. Only getting URLConnectionHttpConduit instead of AsyncHttpConduit

http://cxf.apache.org/docs/asynchronous-client-http-transport.html

How to use PATCH method in CXF

Verifying CXF HttpAsyncClient use of use.async.http.conduit contextual property

Here is the code snippet:

    Bus bus = BusFactory.getDefaultBus();
    // insist on the async connector to use PATCH.
    bus.setProperty(AsyncHTTPConduit.USE_ASYNC,  
AsyncHTTPConduitFactory.UseAsyncPolicy.ALWAYS);
    WebClient webClient = WebClient.create(request.getRestURL());
   WebClient.getConfig(webClient).getBus().setProperty
     (AsyncHTTPConduit.USE_ASYNC, AsyncHTTPConduitFactory.UseAsyncPolicy.ALWAYS);
   WebClient.getConfig(webClient).getRequestContext()
       .put(AsyncHTTPConduit.USE_ASYNC, AsyncHTTPConduitFactory.
       UseAsyncPolicy.ALWAYS);
    HTTPConduit conduit = (HTTPConduit)WebClient.getConfig(webClient)
                           .getConduit();
    System.out.println(conduit.getClass().getName());

    Response response = webClient.invoke(request.getMethod(), null);
    System.out.println("service response = "+ response); 

I even tried using X-HTTP-Method-Override=PATCH header with a POST request,

Other side service is implemented using RestEasy and look's like not honoring X-HTTP-Method-Override header.

Can you please help me finding the issue.

Answer 1

When we got similar problem, we have used CloseableHttpAsyncClient and it works fine. Below is the sample code for your reference:

IOReactorConfig ioReactorConfig = IOReactorConfig.custom().setIoThreadCount(10).build();
ConnectingIOReactor ioReactor = new DefaultConnectingIOReactor(ioReactorConfig);
PoolingNHttpClientConnectionManager cm = new PoolingNHttpClientConnectionManager(ioReactor);
cm.setMaxTotal(100);
cm.setDefaultMaxPerRoute(10);

RequestConfig requestConfig = RequestConfig.custom()
                .setConnectTimeout(30000)
                .setSocketTimeout(30000).build();

CloseableHttpAsyncClient httpclient = HttpAsyncClients.custom()
                .setConnectionManager(cm)
                .setConnectionManagerShared(false)
                .setDefaultRequestConfig(requestConfig)
                .build();
httpclient.start();

HttpPatch httpReq = new HttpPatch(url);
StringEntity entity = new StringEntity(json);
httpReq.setEntity(entity);

Future<HttpResponse> future = httpclient.execute(httpReq, context, null);
HttpResponse httpResponse = future.get();
HttpEntity responseEntity = httpResponse.getEntity();
String responseText = responseEntity != null ? EntityUtils.toString(responseEntity) : null;

You can refer to the link for any more details.