/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.
*/
package org.elasticsearch.transport.netty;
import org.elasticsearch.common.io.ThrowableObjectOutputStream;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.io.stream.CachedStreamOutput;
import org.elasticsearch.common.io.stream.Streamable;
import org.elasticsearch.common.netty.buffer.ChannelBuffer;
import org.elasticsearch.common.netty.buffer.ChannelBuffers;
import org.elasticsearch.common.netty.channel.Channel;
import org.elasticsearch.common.netty.channel.ChannelFuture;
import org.elasticsearch.transport.NotSerializableTransportException;
import org.elasticsearch.transport.RemoteTransportException;
import org.elasticsearch.transport.TransportChannel;
import org.elasticsearch.transport.TransportResponseOptions;
import org.elasticsearch.transport.support.TransportStreams;
import java.io.IOException;
import java.io.NotSerializableException;
/**
* @author kimchy (shay.banon)
*/
public class NettyTransportChannel implements TransportChannel {
private static final byte[] LENGTH_PLACEHOLDER = new byte[4];
private final NettyTransport transport;
private final String action;
private final Channel channel;
private final long requestId;
public NettyTransportChannel(NettyTransport transport, String action, Channel channel, long requestId) {
this.transport = transport;
this.action = action;
this.channel = channel;
this.requestId = requestId;
}
@Override public String action() {
return this.action;
}
@Override public void sendResponse(Streamable message) throws IOException {
sendResponse(message, TransportResponseOptions.EMPTY);
}
@Override public void sendResponse(Streamable message, TransportResponseOptions options) throws IOException {
if (transport.compress) {
options.withCompress(true);
}
CachedStreamOutput.Entry cachedEntry = CachedStreamOutput.popEntry();
TransportStreams.buildResponse(cachedEntry, requestId, message, options);
ChannelBuffer buffer = ChannelBuffers.wrappedBuffer(cachedEntry.bytes().unsafeByteArray(), 0, cachedEntry.bytes().size());
ChannelFuture future = channel.write(buffer);
future.addListener(new NettyTransport.CacheFutureListener(cachedEntry));
}
@Override public void sendResponse(Throwable error) throws IOException {
CachedStreamOutput.Entry cachedEntry = CachedStreamOutput.popEntry();
BytesStreamOutput stream;
try {
stream = cachedEntry.cachedBytes();
writeResponseExceptionHeader(stream);
RemoteTransportException tx = new RemoteTransportException(transport.nodeName(), transport.wrapAddress(channel.getLocalAddress()), action, error);
ThrowableObjectOutputStream too = new ThrowableObjectOutputStream(stream);
too.writeObject(tx);
too.close();
} catch (NotSerializableException e) {
stream = cachedEntry.cachedBytes();
writeResponseExceptionHeader(stream);
RemoteTransportException tx = new RemoteTransportException(transport.nodeName(), transport.wrapAddress(channel.getLocalAddress()), action, new NotSerializableTransportException(error));
ThrowableObjectOutputStream too = new ThrowableObjectOutputStream(stream);
too.writeObject(tx);
too.close();
}
ChannelBuffer buffer = ChannelBuffers.wrappedBuffer(stream.unsafeByteArray(), 0, stream.size());
buffer.setInt(0, buffer.writerIndex() - 4); // update real size.
ChannelFuture future = channel.write(buffer);
future.addListener(new NettyTransport.CacheFutureListener(cachedEntry));
}
private void writeResponseExceptionHeader(BytesStreamOutput stream) throws IOException {
stream.writeBytes(LENGTH_PLACEHOLDER);
stream.writeLong(requestId);
byte status = 0;
status = TransportStreams.statusSetResponse(status);
status = TransportStreams.statusSetError(status);
stream.writeByte(status);
}
}