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Apache HttpComponents Core (non-blocking I/O)
/*
* ====================================================================
* 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
* .
*
*/
package org.apache.http.nio.entity;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import org.apache.http.HttpEntity;
import org.apache.http.entity.HttpEntityWrapper;
import org.apache.http.nio.ContentEncoder;
import org.apache.http.nio.IOControl;
/**
* {@link ProducingNHttpEntity} compatibility adaptor for blocking HTTP
* entities.
*
* @since 4.0
*
* @deprecated (4.2) use {@link EntityAsyncContentProducer}
*/
@Deprecated
public class NHttpEntityWrapper
extends HttpEntityWrapper implements ProducingNHttpEntity {
private final ReadableByteChannel channel;
private final ByteBuffer buffer;
public NHttpEntityWrapper(final HttpEntity httpEntity) throws IOException {
super(httpEntity);
this.channel = Channels.newChannel(httpEntity.getContent());
this.buffer = ByteBuffer.allocate(4096);
}
/**
* This method throws {@link UnsupportedOperationException}.
*/
@Override
public InputStream getContent() throws IOException, UnsupportedOperationException {
throw new UnsupportedOperationException("Does not support blocking methods");
}
@Override
public boolean isStreaming() {
return true;
}
/**
* This method throws {@link UnsupportedOperationException}.
*/
@Override
public void writeTo(final OutputStream out) throws IOException, UnsupportedOperationException {
throw new UnsupportedOperationException("Does not support blocking methods");
}
@Override
public void produceContent(
final ContentEncoder encoder,
final IOControl ioctrl) throws IOException {
final int i = this.channel.read(this.buffer);
this.buffer.flip();
encoder.write(this.buffer);
final boolean buffering = this.buffer.hasRemaining();
this.buffer.compact();
if (i == -1 && !buffering) {
encoder.complete();
this.channel.close();
}
}
@Override
public void finish() {
try {
this.channel.close();
} catch (final IOException ignore) {
}
}
}