/**
* Copyright (C) 2009-2012 Barchart, Inc. <http://www.barchart.com/>
*
* All rights reserved. Licensed under the OSI BSD License.
*
* http://www.opensource.org/licenses/bsd-license.php
*/
package com.barchart.udt.nio;
import java.io.IOException;
import java.nio.channels.ServerSocketChannel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.barchart.udt.SocketUDT;
import com.barchart.udt.TypeUDT;
import com.barchart.udt.anno.ThreadSafe;
/**
* {@link ServerSocketChannel}-like wrapper for {@link SocketUDT} can be either
* stream or message oriented, depending on {@link TypeUDT}
* <p>
* you must use {@link SelectorProviderUDT#openServerSocketChannel()} to obtain
* instance of this class; do not use JDK
* {@link java.nio.channels.ServerSocketChannel#open()};
* <p>
* example:
*
* <pre>
* SelectorProvider provider = SelectorProviderUDT.DATAGRAM;
* ServerSocketChannel acceptChannel = provider.openServerSocketChannel();
* ServerSocket acceptSocket = acceptChannel.socket();
* InetSocketAddress acceptAddress = new InetSocketAddress("localhost", 12345);
* acceptorSocket.bind(acceptAddress);
* assert acceptSocket.isBound();
* SocketChannel connectChannel = acceptChannel.accept();
* assert connectChannel.isConnected();
* </pre>
*/
public class ServerSocketChannelUDT extends ServerSocketChannel implements
ChannelUDT {
protected static final Logger log = LoggerFactory
.getLogger(ServerSocketChannelUDT.class);
@ThreadSafe("this")
protected NioServerSocketUDT socketAdapter;
protected final SocketUDT socketUDT;
protected ServerSocketChannelUDT( //
final SelectorProviderUDT provider, //
final SocketUDT socketUDT //
) {
super(provider);
this.socketUDT = socketUDT;
}
@Override
public SocketChannelUDT accept() throws IOException {
try {
begin();
final SocketUDT clientUDT = socketUDT.accept();
if (clientUDT == null) {
return null;
} else {
return new SocketChannelUDT( //
providerUDT(), //
clientUDT, //
clientUDT.isConnected() //
);
}
} finally {
end(true);
}
}
@Override
protected void implCloseSelectableChannel() throws IOException {
socketUDT.close();
}
@Override
protected void implConfigureBlocking(final boolean block)
throws IOException {
socketUDT.setBlocking(block);
}
@Override
public boolean isConnectFinished() {
return true;
}
@Override
public KindUDT kindUDT() {
return KindUDT.ACCEPTOR;
}
@Override
public SelectorProviderUDT providerUDT() {
return (SelectorProviderUDT) super.provider();
}
@Override
public synchronized NioServerSocketUDT socket() {
if (socketAdapter == null) {
try {
socketAdapter = new NioServerSocketUDT(this);
} catch (final Exception e) {
log.error("failed to make socket", e);
return null;
}
}
return socketAdapter;
}
@Override
public SocketUDT socketUDT() {
return socketUDT;
}
@Override
public String toString() {
return socketUDT.toString();
}
@Override
public TypeUDT typeUDT() {
return providerUDT().type();
}
}