/**
* Licensed to Cloudera, Inc. under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Cloudera, Inc. 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.
*/
/*
* 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.
*/
package org.apache.thrift.transport;
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 com.cloudera.flume.handlers.thrift.TBufferedSocket;
/**
* Wrapper around ServerSocket for Thrift.
*
* This is different from thrift's TServerSocket because it doesn't attempt to
* bind or open on construction -- instead it lazily opens when the listen api
* server socket api call is made.
*/
public class TSaneServerSocket extends TServerTransport {
private static final Logger LOGGER = LoggerFactory
.getLogger(TSaneServerSocket.class);
/**
* Underlying serversocket object
*/
private ServerSocket serverSocket_ = null;
final InetSocketAddress bindAddr;
/**
* Timeout for client sockets from accept
*/
private int clientTimeout_ = 0;
/**
* Creates just a port listening server socket
*/
public TSaneServerSocket(int port) throws TTransportException {
this(port, 0);
}
/**
* Creates just a port listening server socket
*/
public TSaneServerSocket(int port, int clientTimeout)
throws TTransportException {
this(new InetSocketAddress(port), clientTimeout);
}
public TSaneServerSocket(InetSocketAddress bindAddr)
throws TTransportException {
this(bindAddr, 0);
}
public TSaneServerSocket(InetSocketAddress bindAddr, int clientTimeout)
throws TTransportException {
clientTimeout_ = clientTimeout;
this.bindAddr = bindAddr;
}
private void bind() 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() + ".");
}
}
public void listen() throws TTransportException {
bind();
// 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);
}
}
}
protected TTransport acceptImpl() throws TTransportException {
if (serverSocket_ == null) {
throw new TTransportException(TTransportException.NOT_OPEN,
"No underlying server socket.");
}
try {
Socket result = serverSocket_.accept();
TSocket result2 = new TBufferedSocket(result);
result2.setTimeout(clientTimeout_);
return result2;
} catch (IOException iox) {
throw new TTransportException(iox);
}
}
public void close() {
if (serverSocket_ != null) {
try {
serverSocket_.close();
} catch (IOException iox) {
LOGGER.warn("Could not close server socket.", iox);
}
serverSocket_ = null;
}
}
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();
}
}