/*Copyright (c) 2008 Nikos Siatras
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.*/
package Extasys.Network.UDP.Client.Connectors;
import Extasys.Network.UDP.Client.Connectors.Packets.*;
import Extasys.Network.UDP.Client.ExtasysUDPClient;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
/**
*
* @author Nikos Siatras
*/
public class UDPConnector
{
protected boolean fActive = false;
protected ExtasysUDPClient fMyUDPClient; //Extasys UDP Client reference.
public DatagramSocket fSocket;
protected InetAddress fServerIP;
protected int fServerPort;
protected Thread fReadDataThread;
protected String fName;
protected int fReadBufferSize;
protected int fReadTimeOut;
public int fBytesIn = 0;
public int fBytesOut = 0;
public IncomingUDPClientPacket fLastIncomingPacket = null;
public OutgoingUDPClientPacket fLastOutgoingPacket = null;
/**
* Constructs a new UDP Connector.
* @param myClient is the connectors main Extasys UDP Client.
* @param name is the name of the connector.
* @param readBufferSize is the maximum number of bytes the socket can read at a time.
* @param readTimeOut is the maximum time in milliseconds in wich a datagram packet can be received. Set to 0 for no time-out.
* @param serverIP is the server's ip address the connector will use to send data.
* @param serverPort is the server's udp port.
*/
public UDPConnector(ExtasysUDPClient myClient, String name, int readBufferSize, int readTimeOut, InetAddress serverIP, int serverPort)
{
fMyUDPClient = myClient;
fName = name;
fReadBufferSize = readBufferSize;
fReadTimeOut = readTimeOut;
fServerIP = serverIP;
fServerPort = serverPort;
}
/**
* Start the udp connector.
*/
public void Start() throws SocketException, Exception
{
if (!fActive)
{
try
{
fActive = true;
try
{
fSocket = new DatagramSocket();
}
catch (SocketException ex)
{
fActive = false;
throw ex;
}
fSocket.setReceiveBufferSize(fReadBufferSize);
fSocket.setSendBufferSize(fReadBufferSize);
fLastIncomingPacket = null;
fLastOutgoingPacket = null;
if (fReadTimeOut > 0)
{
fSocket.setSoTimeout(fReadTimeOut);
}
try
{
fReadDataThread = new ReadIncomingData(this);
fReadDataThread.start();
}
catch (Exception ex)
{
throw ex;
}
}
catch (SocketException ex)
{
Stop();
throw ex;
}
}
}
/**
* Stop the udp connector.
*/
public void Stop()
{
if (fActive)
{
fActive = false;
try
{
fSocket.close();
}
catch (Exception ex)
{
}
if (fLastIncomingPacket != null)
{
fLastIncomingPacket.Cancel();
}
if (fLastOutgoingPacket != null)
{
fLastOutgoingPacket.Cancel();
}
try
{
fReadDataThread.interrupt();
}
catch (Exception ex)
{
}
}
}
/**
* Send data to all host.
* @param data is the string to be send.
*/
public void SendData(String data) throws IOException
{
DatagramPacket outPacket = new DatagramPacket(data.getBytes(), data.length(), fServerIP, fServerPort);
fLastOutgoingPacket = new OutgoingUDPClientPacket(this, outPacket, fLastOutgoingPacket);
}
/**
* Send data to host.
* @param bytes is the byte array to be send.
* @param offset is the position in the data buffer at witch to begin sending.
* @param length is the number of the bytes to be send.
*/
public void SendData(byte[] bytes, int offset, int length) throws IOException
{
DatagramPacket outPacket = new DatagramPacket(bytes, offset, length, fServerIP, fServerPort);
fLastOutgoingPacket = new OutgoingUDPClientPacket(this, outPacket, fLastOutgoingPacket);
}
public boolean isActive()
{
return fActive;
}
/**
* Returns the main Extasys UDP Client of the connector.
* @return the main Extasys UDP Client of the connector.
*/
public ExtasysUDPClient getMyExtasysUDPClient()
{
return fMyUDPClient;
}
/**
* Returns the name of this connector.
* @return the name of this connector
*/
public String getName()
{
return fName;
}
/**
* Returns the read buffer size of the connection.
* @return the read buffer size of the connection
*/
public int getReadBufferSize()
{
return fReadBufferSize;
}
/**
* Returns the maximum time in milliseconds in wich a datagram packet can be received.
* Set to 0 for no time-out.
* @return the maximum time in milliseconds in wich a datagram packet can be received.
*/
public int getReadTimeOut()
{
return fReadTimeOut;
}
/**
* Return the number of bytes received from this connector.
* @return the number of bytes received from this connector.
*/
public int getBytesIn()
{
return fBytesIn;
}
/**
* Returns the active state of the message collector.
* @return True if this connector uses message collector.
*/
public int getBytesOut()
{
return fBytesOut;
}
}
class ReadIncomingData extends Thread
{
private UDPConnector fMyConnector;
public ReadIncomingData(UDPConnector myUDPConnector)
{
fMyConnector = myUDPConnector;
}
@Override
public void run()
{
DatagramPacket receivedPacket;
byte[] data;
while (fMyConnector.isActive())
{
try
{
data = new byte[fMyConnector.getReadBufferSize()];
receivedPacket = new DatagramPacket(data, data.length);
fMyConnector.fSocket.receive(receivedPacket);
fMyConnector.fBytesIn += receivedPacket.getLength();
fMyConnector.fLastIncomingPacket = new IncomingUDPClientPacket(fMyConnector, receivedPacket, fMyConnector.fLastIncomingPacket);
}
catch (IOException ex)
{
//System.out.print(fMyConnector.getName() + "- ");
//ex.printStackTrace();
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
}
}