package org.apache.cassandra.thrift;
/*
*
* 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.
*
*/
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.thrift.transport.TServerSocket;
import org.apache.thrift.transport.TServerTransport;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransportException;
/**
* Extends Thrift's TServerSocket to allow customization of various desirable TCP properties.
*/
public class TCustomServerSocket extends TServerTransport
{
private static final Logger logger = LoggerFactory.getLogger(TCustomServerSocket.class);
/**
* Underlying serversocket object
*/
private ServerSocket serverSocket_ = null;
private final boolean keepAlive;
private final Integer sendBufferSize;
private final Integer recvBufferSize;
/**
* Allows fine-tuning of the server socket including keep-alive, reuse of addresses, send and receive buffer sizes.
*
* @param bindAddr
* @param keepAlive
* @param sendBufferSize
* @param recvBufferSize
* @throws TTransportException
*/
public TCustomServerSocket(InetSocketAddress bindAddr, boolean keepAlive, Integer sendBufferSize,
Integer recvBufferSize)
throws TTransportException
{
try
{
// Make server socket
serverSocket_ = new ServerSocket();
// Prevent 2MSL delay problem on server restarts
serverSocket_.setReuseAddress(true);
// Bind to listening port
serverSocket_.bind(bindAddr);
}
catch (IOException ioe)
{
serverSocket_ = null;
throw new TTransportException("Could not create ServerSocket on address " + bindAddr.toString() + ".");
}
this.keepAlive = keepAlive;
this.sendBufferSize = sendBufferSize;
this.recvBufferSize = recvBufferSize;
}
@Override
protected TCustomSocket acceptImpl() throws TTransportException
{
if (serverSocket_ == null)
throw new TTransportException(TTransportException.NOT_OPEN, "No underlying server socket.");
TCustomSocket tsocket = null;
Socket socket = null;
try
{
socket = serverSocket_.accept();
tsocket = new TCustomSocket(socket);
tsocket.setTimeout(0);
}
catch (IOException iox)
{
throw new TTransportException(iox);
}
try
{
socket.setKeepAlive(this.keepAlive);
}
catch (SocketException se)
{
logger.warn("Failed to set keep-alive on Thrift socket.", se);
}
if (this.sendBufferSize != null)
{
try
{
socket.setSendBufferSize(this.sendBufferSize.intValue());
}
catch (SocketException se)
{
logger.warn("Failed to set send buffer size on Thrift socket.", se);
}
}
if (this.recvBufferSize != null)
{
try
{
socket.setReceiveBufferSize(this.recvBufferSize.intValue());
}
catch (SocketException se)
{
logger.warn("Failed to set receive buffer size on Thrift socket.", se);
}
}
return tsocket;
}
@Override
public void listen() throws TTransportException
{
// Make sure not to block on accept
if (serverSocket_ != null)
{
try
{
serverSocket_.setSoTimeout(0);
}
catch (SocketException sx)
{
logger.error("Could not set socket timeout.", sx);
}
}
}
@Override
public void close()
{
if (serverSocket_ != null)
{
try
{
serverSocket_.close();
}
catch (IOException iox)
{
logger.warn("Could not close server socket.", iox);
}
serverSocket_ = null;
}
}
@Override
public void interrupt()
{
// The thread-safeness of this is dubious, but Java documentation suggests
// that it is safe to do this from a different thread context
close();
}
}