try {
AsyncClientHttpRequest request = createAsyncRequest(url, method);
if (requestCallback != null) {
requestCallback.doWithRequest(request);
}
ListenableFuture<ClientHttpResponse> responseFuture = request.executeAsync();
return new ResponseExtractorFuture<T>(method, url, responseFuture, responseExtractor);
}
catch (IOException ex) {
throw new ResourceAccessException("I/O error on " + method.name() +
" request for \"" + url + "\":" + ex.getMessage(), ex);