org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl 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 DefaultClientExchangeHandlerImpl extends AbstractClientExchangeHandler {
private final HttpAsyncRequestProducer requestProducer;
private final HttpAsyncResponseConsumer responseConsumer;
private final BasicFuture resultFuture;
private final InternalClientExec exec;
private final InternalState state;
public DefaultClientExchangeHandlerImpl(
final Log log,
final HttpAsyncRequestProducer requestProducer,
final HttpAsyncResponseConsumer responseConsumer,
final HttpClientContext localContext,
final BasicFuture resultFuture,
final NHttpClientConnectionManager connmgr,
final ConnectionReuseStrategy connReuseStrategy,
final ConnectionKeepAliveStrategy keepaliveStrategy,
final InternalClientExec exec) {
super(log, localContext, connmgr, connReuseStrategy, keepaliveStrategy);
this.requestProducer = requestProducer;
this.responseConsumer = responseConsumer;
this.resultFuture = resultFuture;
this.exec = exec;
this.state = new InternalState(getId(), requestProducer, responseConsumer, localContext);
}
@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) {
try {
this.requestProducer.failed(ex);
this.responseConsumer.failed(ex);
} finally {
this.resultFuture.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);
}
this.exec.prepare(target, original, this.state, this);
requestConnection();
}
@Override
public HttpRequest generateRequest() throws IOException, HttpException {
return this.exec.generateRequest(this.state, this);
}
@Override
public void produceContent(
final ContentEncoder encoder, final IOControl ioctrl) throws IOException {
this.exec.produceContent(this.state, encoder, ioctrl);
}
@Override
public void requestCompleted() {
this.exec.requestCompleted(this.state, this);
}
@Override
public void responseReceived(
final HttpResponse response) throws IOException, HttpException {
this.exec.responseReceived(response, this.state, this);
}
@Override
public void consumeContent(
final ContentDecoder decoder, final IOControl ioctrl) throws IOException {
this.exec.consumeContent(this.state, decoder, ioctrl);
if (!decoder.isCompleted() && this.responseConsumer.isDone()) {
markConnectionNonReusable();
try {
markCompleted();
releaseConnection();
this.resultFuture.cancel();
} finally {
close();
}
}
}
@Override
public void responseCompleted() throws IOException, HttpException {
this.exec.responseCompleted(this.state, this);
if (this.state.getFinalResponse() != null || this.resultFuture.isDone()) {
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();
}
} else {
NHttpClientConnection localConn = getConnection();
if (localConn != null && !localConn.isOpen()) {
releaseConnection();
localConn = null;
}
if (localConn != null) {
localConn.requestOutput();
} else {
requestConnection();
}
}
}
@Override
public void inputTerminated() {
if (!isCompleted()) {
requestConnection();
} else {
close();
}
}
public void abortConnection() {
discardConnection();
}
}