/*
* Copyright 2012 The Netty Project
*
* The Netty Project 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 io.netty.channel.socket.oio;
import io.netty.buffer.BufType;
import io.netty.buffer.MessageBuf;
import io.netty.channel.ChannelException;
import io.netty.channel.ChannelMetadata;
import io.netty.channel.oio.AbstractOioMessageChannel;
import io.netty.channel.socket.ServerSocketChannel;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.SocketTimeoutException;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
/**
* {@link ServerSocketChannel} which accepts new connections and create the {@link OioSocketChannel}'s for them.
*
* This implementation use Old-Blocking-IO.
*/
public class OioServerSocketChannel extends AbstractOioMessageChannel
implements ServerSocketChannel {
private static final InternalLogger logger =
InternalLoggerFactory.getInstance(OioServerSocketChannel.class);
private static final ChannelMetadata METADATA = new ChannelMetadata(BufType.MESSAGE, false);
private static ServerSocket newServerSocket() {
try {
return new ServerSocket();
} catch (IOException e) {
throw new ChannelException("failed to create a server socket", e);
}
}
final ServerSocket socket;
final Lock shutdownLock = new ReentrantLock();
private final OioServerSocketChannelConfig config;
/**
* Create a new instance with an new {@link Socket}
*/
public OioServerSocketChannel() {
this(newServerSocket());
}
/**
* Create a new instance from the given {@link ServerSocket}
*
* @param socket the {@link ServerSocket} which is used by this instance
*/
public OioServerSocketChannel(ServerSocket socket) {
this(null, socket);
}
/**
* Create a new instance from the given {@link ServerSocket}
*
* @param id the id which should be used for this instance or {@code null} if a new one should be generated
* @param socket the {@link ServerSocket} which is used by this instance
*/
public OioServerSocketChannel(Integer id, ServerSocket socket) {
super(null, id);
if (socket == null) {
throw new NullPointerException("socket");
}
boolean success = false;
try {
socket.setSoTimeout(SO_TIMEOUT);
success = true;
} catch (IOException e) {
throw new ChannelException(
"Failed to set the server socket timeout.", e);
} finally {
if (!success) {
try {
socket.close();
} catch (IOException e) {
if (logger.isWarnEnabled()) {
logger.warn(
"Failed to close a partially initialized socket.", e);
}
}
}
}
this.socket = socket;
config = new DefaultOioServerSocketChannelConfig(this, socket);
}
@Override
public InetSocketAddress localAddress() {
return (InetSocketAddress) super.localAddress();
}
@Override
public ChannelMetadata metadata() {
return METADATA;
}
@Override
public OioServerSocketChannelConfig config() {
return config;
}
@Override
public InetSocketAddress remoteAddress() {
return null;
}
@Override
public boolean isOpen() {
return !socket.isClosed();
}
@Override
public boolean isActive() {
return isOpen() && socket.isBound();
}
@Override
protected SocketAddress localAddress0() {
return socket.getLocalSocketAddress();
}
@Override
protected void doBind(SocketAddress localAddress) throws Exception {
socket.bind(localAddress, config.getBacklog());
}
@Override
protected void doClose() throws Exception {
socket.close();
}
@Override
protected int doReadMessages(MessageBuf<Object> buf) throws Exception {
if (socket.isClosed()) {
return -1;
}
Socket s = null;
try {
s = socket.accept();
if (s != null) {
buf.add(new OioSocketChannel(this, null, s));
return 1;
}
} catch (SocketTimeoutException e) {
// Expected
} catch (Throwable t) {
logger.warn("Failed to create a new channel from an accepted socket.", t);
if (s != null) {
try {
s.close();
} catch (Throwable t2) {
logger.warn("Failed to close a socket.", t2);
}
}
}
return 0;
}
@Override
protected void doConnect(
SocketAddress remoteAddress, SocketAddress localAddress) throws Exception {
throw new UnsupportedOperationException();
}
@Override
protected SocketAddress remoteAddress0() {
return null;
}
@Override
protected void doDisconnect() throws Exception {
throw new UnsupportedOperationException();
}
@Override
protected void doWriteMessages(MessageBuf<Object> buf) throws Exception {
throw new UnsupportedOperationException();
}
}