| /* |
| * ==================================================================== |
| * 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 |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.http.impl.nio.client; |
| |
| import java.io.IOException; |
| |
| import org.apache.http.HttpResponse; |
| import org.apache.http.nio.ContentDecoder; |
| import org.apache.http.nio.IOControl; |
| import org.apache.http.nio.client.HttpAsyncResponseConsumer; |
| import org.apache.http.nio.entity.BufferingNHttpEntity; |
| import org.apache.http.nio.entity.ConsumingNHttpEntity; |
| import org.apache.http.nio.util.HeapByteBufferAllocator; |
| |
| public class BasicHttpAsyncResponseConsumer implements HttpAsyncResponseConsumer<HttpResponse> { |
| |
| private volatile HttpResponse response; |
| private volatile ConsumingNHttpEntity contentConsumingEntity; |
| private volatile HttpResponse result; |
| private volatile Exception ex; |
| private volatile boolean completed; |
| |
| public BasicHttpAsyncResponseConsumer() { |
| super(); |
| } |
| |
| protected ConsumingNHttpEntity createConsumingHttpEntity( |
| final HttpResponse response) throws IOException { |
| if (response.getEntity() != null) { |
| return new BufferingNHttpEntity(response.getEntity(), new HeapByteBufferAllocator()); |
| } else { |
| return null; |
| } |
| } |
| |
| private ConsumingNHttpEntity getConsumingHttpEntity() throws IOException { |
| if (this.contentConsumingEntity == null) { |
| this.contentConsumingEntity = createConsumingHttpEntity(this.response); |
| if (this.contentConsumingEntity == null) { |
| throw new IllegalStateException("Content consumer is null"); |
| } |
| } |
| return this.contentConsumingEntity; |
| } |
| |
| private void releaseResources() { |
| if (this.contentConsumingEntity != null) { |
| try { |
| this.contentConsumingEntity.finish(); |
| this.contentConsumingEntity = null; |
| } catch (IOException ex) { |
| } |
| } |
| } |
| |
| public synchronized void responseReceived(final HttpResponse response) { |
| if (this.response != null) { |
| throw new IllegalStateException("HTTP response already set"); |
| } |
| this.response = response; |
| } |
| |
| public synchronized void consumeContent( |
| final ContentDecoder decoder, final IOControl ioctrl) throws IOException { |
| ConsumingNHttpEntity consumer = getConsumingHttpEntity(); |
| consumer.consumeContent(decoder, ioctrl); |
| if (decoder.isCompleted()) { |
| this.response.setEntity(consumer); |
| releaseResources(); |
| } |
| } |
| |
| public synchronized void responseCompleted() { |
| if (this.completed) { |
| return; |
| } |
| this.completed = true; |
| if (this.response != null) { |
| this.result = this.response; |
| } |
| releaseResources(); |
| } |
| |
| public synchronized void cancel() { |
| if (this.completed) { |
| return; |
| } |
| this.completed = true; |
| this.response = null; |
| releaseResources(); |
| } |
| |
| public synchronized void failed(final Exception ex) { |
| if (this.completed) { |
| return; |
| } |
| this.completed = true; |
| this.ex = ex; |
| this.response = null; |
| releaseResources(); |
| } |
| |
| public Exception getException() { |
| return this.ex; |
| } |
| |
| public void setEx(Exception ex) { |
| this.ex = ex; |
| } |
| |
| public HttpResponse getResult() { |
| return this.result; |
| } |
| |
| } |