org.springframework.http.client.HttpComponentsAsyncClientHttpRequest Maven / Gradle / Ivy
/*
* Copyright 2002-2014 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.http.client;
import java.io.IOException;
import java.net.URI;
import java.util.concurrent.Future;
import org.apache.http.HttpEntity;
import org.apache.http.HttpEntityEnclosingRequest;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.concurrent.FutureCallback;
import org.apache.http.nio.client.HttpAsyncClient;
import org.apache.http.nio.entity.NByteArrayEntity;
import org.apache.http.protocol.HttpContext;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.util.concurrent.FutureAdapter;
import org.springframework.util.concurrent.ListenableFuture;
import org.springframework.util.concurrent.ListenableFutureCallback;
import org.springframework.util.concurrent.ListenableFutureCallbackRegistry;
/**
* {@link ClientHttpRequest} implementation that uses Apache HttpComponents HttpClient to
* execute requests.
*
* Created via the {@link org.springframework.http.client.HttpComponentsClientHttpRequestFactory}.
*
* @author Oleg Kalnichevski
* @author Arjen Poutsma
* @since 4.0
* @see org.springframework.http.client.HttpComponentsClientHttpRequestFactory#createRequest
*/
final class HttpComponentsAsyncClientHttpRequest extends AbstractBufferingAsyncClientHttpRequest {
private final HttpAsyncClient httpClient;
private final HttpUriRequest httpRequest;
private final HttpContext httpContext;
HttpComponentsAsyncClientHttpRequest(HttpAsyncClient httpClient, HttpUriRequest httpRequest, HttpContext httpContext) {
this.httpClient = httpClient;
this.httpRequest = httpRequest;
this.httpContext = httpContext;
}
@Override
public HttpMethod getMethod() {
return HttpMethod.valueOf(this.httpRequest.getMethod());
}
@Override
public URI getURI() {
return this.httpRequest.getURI();
}
@Override
protected ListenableFuture executeInternal(HttpHeaders headers, byte[] bufferedOutput)
throws IOException {
HttpComponentsClientHttpRequest.addHeaders(this.httpRequest, headers);
if (this.httpRequest instanceof HttpEntityEnclosingRequest) {
HttpEntityEnclosingRequest entityEnclosingRequest = (HttpEntityEnclosingRequest) this.httpRequest;
HttpEntity requestEntity = new NByteArrayEntity(bufferedOutput);
entityEnclosingRequest.setEntity(requestEntity);
}
final HttpResponseFutureCallback callback = new HttpResponseFutureCallback();
final Future futureResponse =
this.httpClient.execute(this.httpRequest, this.httpContext, callback);
return new ClientHttpResponseFuture(futureResponse, callback);
}
private static class HttpResponseFutureCallback implements FutureCallback {
private final ListenableFutureCallbackRegistry callbacks =
new ListenableFutureCallbackRegistry();
public void addCallback(ListenableFutureCallback callback) {
this.callbacks.addCallback(callback);
}
@Override
public void completed(HttpResponse result) {
this.callbacks.success(new HttpComponentsAsyncClientHttpResponse(result));
}
@Override
public void failed(Exception ex) {
this.callbacks.failure(ex);
}
@Override
public void cancelled() {
}
}
private static class ClientHttpResponseFuture extends FutureAdapter
implements ListenableFuture {
private final HttpResponseFutureCallback callback;
public ClientHttpResponseFuture(Future futureResponse, HttpResponseFutureCallback callback) {
super(futureResponse);
this.callback = callback;
}
@Override
protected ClientHttpResponse adapt(HttpResponse response) {
return new HttpComponentsAsyncClientHttpResponse(response);
}
@Override
public void addCallback(ListenableFutureCallback callback) {
this.callback.addCallback(callback);
}
}
}