/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Nam Nguyen
*/
package com.caucho.quercus.lib.file;
import com.caucho.quercus.env.Env;
import com.caucho.vfs.DatagramStream;
import java.io.IOException;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketAddress;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Represents read/write stream
*/
public class UdpInputOutput
extends AbstractBinaryInputOutput
implements SocketInputOutput
{
private static final Logger log
= Logger.getLogger(UdpInputOutput.class.getName());
private DatagramSocket _socket;
private Domain _domain;
private DatagramStream _stream;
private int _error;
private byte _unread;
public UdpInputOutput(Env env, String host, int port, Domain domain)
throws IOException
{
super(env);
_socket = new DatagramSocket();
_socket.connect(InetAddress.getByName(host), port);
_domain = domain;
}
public UdpInputOutput(Env env, DatagramSocket socket, Domain domain)
{
super(env);
_socket = socket;
_domain = domain;
}
public void bind(SocketAddress address)
throws IOException
{
_socket.bind(address);
}
public void connect(SocketAddress address)
throws IOException
{
_socket.connect(address);
init();
}
public void init()
{
DatagramStream sock = new DatagramStream(_socket);
sock.setThrowReadInterrupts(true);
init(sock.getInputStream(), sock.getOutputStream());
}
public void setTimeout(long timeout)
{
try {
if (_socket != null)
_socket.setSoTimeout((int) timeout);
} catch (Exception e) {
log.log(Level.FINER, e.toString(), e);
}
}
public void setError(int error)
{
_error = error;
}
/**
* Returns the current location in the file.
*/
public long getPosition()
{
if (_stream != null)
return _stream.getPosition();
else
return -1;
}
/**
* Sets the current location in the file.
*/
public boolean setPosition(long offset)
{
if (_stream == null)
return false;
boolean result = _stream.setPosition(offset);
if (result)
_isEOF = false;
return result;
}
/**
* Unread the last byte.
*/
public void unread()
throws IOException
{
if (_stream != null) {
_stream.unread();
_isEOF = false;
}
}
/**
* Implements the EnvCleanup interface.
*/
public void cleanup()
{
DatagramSocket s = _socket;
_socket = null;
if (s != null)
s.close();
}
public String toString()
{
if (_socket != null)
return "UdpInputOutput["
+ _socket.getInetAddress() + "," + _socket.getPort() + "]";
else
return "UdpInputOutput[closed]";
}
}