/*
* Copyright © 2014 Cask Data, Inc.
*
* 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 co.cask.http;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelFuture;
import org.jboss.netty.channel.ChannelFutureListener;
import org.jboss.netty.handler.codec.http.DefaultHttpChunk;
import org.jboss.netty.handler.codec.http.DefaultHttpChunkTrailer;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.concurrent.atomic.AtomicBoolean;
/**
* A {@link ChunkResponder} that writes chunks to a {@link Channel}.
*/
final class ChannelChunkResponder implements ChunkResponder {
private final Channel channel;
private final boolean keepAlive;
private final AtomicBoolean closed;
ChannelChunkResponder(Channel channel, boolean keepAlive) {
this.channel = channel;
this.keepAlive = keepAlive;
this.closed = new AtomicBoolean(false);
}
@Override
public void sendChunk(ByteBuffer chunk) throws IOException {
sendChunk(ChannelBuffers.wrappedBuffer(chunk));
}
@Override
public void sendChunk(ChannelBuffer chunk) throws IOException {
if (closed.get()) {
throw new IOException("ChunkResponder already closed.");
}
if (!channel.isConnected()) {
throw new IOException("Connection already closed.");
}
channel.write(new DefaultHttpChunk(chunk));
}
@Override
public void close() throws IOException {
if (!closed.compareAndSet(false, true)) {
return;
}
ChannelFuture future = channel.write(new DefaultHttpChunkTrailer());
if (!keepAlive) {
future.addListener(ChannelFutureListener.CLOSE);
}
}
}