org.apache.http.impl.nio.client.MinimalClientExchangeHandlerImpl Maven / Gradle / Ivy
/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
*
* Instances of this class are expected to be accessed by one thread at a time only.
* The {@link #cancel()} method can be called concurrently by multiple threads.
*/
class MinimalClientExchangeHandlerImpl extends AbstractClientExchangeHandler {
private final HttpAsyncRequestProducer requestProducer;
private final HttpAsyncResponseConsumer responseConsumer;
private final HttpClientContext localContext;
private final BasicFuture resultFuture;
private final HttpProcessor httpProcessor;
public MinimalClientExchangeHandlerImpl(
final Log log,
final HttpAsyncRequestProducer requestProducer,
final HttpAsyncResponseConsumer responseConsumer,
final HttpClientContext localContext,
final BasicFuture resultFuture,
final NHttpClientConnectionManager connmgr,
final HttpProcessor httpProcessor,
final ConnectionReuseStrategy connReuseStrategy,
final ConnectionKeepAliveStrategy keepaliveStrategy) {
super(log, localContext, resultFuture, connmgr, connReuseStrategy, keepaliveStrategy);
this.requestProducer = requestProducer;
this.responseConsumer = responseConsumer;
this.localContext = localContext;
this.resultFuture = resultFuture;
this.httpProcessor = httpProcessor;
}
@Override
void releaseResources() {
try {
this.requestProducer.close();
} catch (final IOException ex) {
this.log.debug("I/O error closing request producer", ex);
}
try {
this.responseConsumer.close();
} catch (final IOException ex) {
this.log.debug("I/O error closing response consumer", ex);
}
}
@Override
void executionFailed(final Exception ex) {
this.requestProducer.failed(ex);
this.responseConsumer.failed(ex);
}
@Override
boolean executionCancelled() {
final boolean cancelled = this.responseConsumer.cancel();
final T result = this.responseConsumer.getResult();
final Exception ex = this.responseConsumer.getException();
if (ex != null) {
this.resultFuture.failed(ex);
} else if (result != null) {
this.resultFuture.completed(result);
} else {
this.resultFuture.cancel();
}
return cancelled;
}
public void start() throws HttpException, IOException {
final HttpHost target = this.requestProducer.getTarget();
final HttpRequest original = this.requestProducer.generateRequest();
if (original instanceof HttpExecutionAware) {
((HttpExecutionAware) original).setCancellable(this);
}
if (this.log.isDebugEnabled()) {
this.log.debug("[exchange: " + getId() + "] start execution");
}
if (original instanceof Configurable) {
final RequestConfig config = ((Configurable) original).getConfig();
if (config != null) {
this.localContext.setRequestConfig(config);
}
}
final HttpRequestWrapper request = HttpRequestWrapper.wrap(original);
final HttpRoute route = new HttpRoute(target);
setCurrentRequest(request);
setRoute(route);
this.localContext.setAttribute(HttpClientContext.HTTP_REQUEST, request);
this.localContext.setAttribute(HttpClientContext.HTTP_TARGET_HOST, target);
this.localContext.setAttribute(HttpClientContext.HTTP_ROUTE, route);
this.httpProcessor.process(request, this.localContext);
requestConnection();
}
@Override
public HttpRequest generateRequest() throws IOException, HttpException {
verifytRoute();
if (!isRouteEstablished()) {
onRouteToTarget();
onRouteComplete();
}
final NHttpClientConnection localConn = getConnection();
this.localContext.setAttribute(HttpCoreContext.HTTP_CONNECTION, localConn);
final RequestConfig config = this.localContext.getRequestConfig();
if (config.getSocketTimeout() > 0) {
localConn.setSocketTimeout(config.getSocketTimeout());
}
return getCurrentRequest();
}
@Override
public void produceContent(
final ContentEncoder encoder, final IOControl ioctrl) throws IOException {
if (this.log.isDebugEnabled()) {
this.log.debug("[exchange: " + getId() + "] produce content");
}
this.requestProducer.produceContent(encoder, ioctrl);
if (encoder.isCompleted()) {
this.requestProducer.resetRequest();
}
}
@Override
public void requestCompleted() {
if (this.log.isDebugEnabled()) {
this.log.debug("[exchange: " + getId() + "] Request completed");
}
this.requestProducer.requestCompleted(this.localContext);
}
@Override
public void responseReceived(
final HttpResponse response) throws IOException, HttpException {
if (this.log.isDebugEnabled()) {
this.log.debug("[exchange: " + getId() + "] Response received " + response.getStatusLine());
}
this.localContext.setAttribute(HttpClientContext.HTTP_RESPONSE, response);
this.httpProcessor.process(response, this.localContext);
setCurrentResponse(response);
this.responseConsumer.responseReceived(response);
}
@Override
public void consumeContent(
final ContentDecoder decoder, final IOControl ioctrl) throws IOException {
if (this.log.isDebugEnabled()) {
this.log.debug("[exchange: " + getId() + "] Consume content");
}
this.responseConsumer.consumeContent(decoder, ioctrl);
if (!decoder.isCompleted() && this.responseConsumer.isDone()) {
markConnectionNonReusable();
try {
markCompleted();
releaseConnection();
this.resultFuture.cancel();
} finally {
close();
}
}
}
@Override
public void responseCompleted() throws IOException, HttpException {
manageConnectionPersistence();
this.responseConsumer.responseCompleted(this.localContext);
if (this.log.isDebugEnabled()) {
this.log.debug("[exchange: " + getId() + "] Response processed");
}
try {
markCompleted();
releaseConnection();
final T result = this.responseConsumer.getResult();
final Exception ex = this.responseConsumer.getException();
if (ex == null) {
this.resultFuture.completed(result);
} else {
this.resultFuture.failed(ex);
}
} finally {
close();
}
}
@Override
public void inputTerminated() {
close();
}
public void abortConnection() {
discardConnection();
}
}