uk.ac.ic.doc.automed.p2p.communication
Class UDPClient

java.lang.Object
  uk.ac.ic.doc.automed.p2p.communication.AbstractClient
      uk.ac.ic.doc.automed.p2p.communication.UDPClient

All Implemented Interfaces:

Threadable

public class UDPClient
extends AbstractClient

Field Summary

Fields inherited from class uk.ac.ic.doc.automed.p2p.communication.AbstractClient

ackExpected, dataToSend, handler, isReady, serverHostName, serverPort

Constructor Summary

UDPClient(RequestListener handler)

UDPClient(java.lang.String serverHostName, int serverPort, RequestListener handler)
Creates a new instance of UDPClient

UDPClient(java.lang.String serverHostName, int serverPort, RequestListener handler, byte[] dataToSend)
Creates a new instance of UDPClient

Method Summary

byte[]	getReceivedData() Get the data received from server
void	handleAction() Handle thread's interrupted action
static java.net.DatagramPacket	receiveDatagram(java.net.DatagramSocket socket) Receive response packets in a separate thread
void	runAction() Implement UDP communication process
static void	sendDatagram(java.net.DatagramSocket dsock, byte[] dataToSend, java.net.InetAddress remoteAddress, int remotePort) An utility method for sending a datagram given a socket.

Methods inherited from class uk.ac.ic.doc.automed.p2p.communication.AbstractClient

getHandlerObject, getReadyState, setDataToSend, setReadyState

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UDPClient

public UDPClient(java.lang.String serverHostName,
                 int serverPort,
                 RequestListener handler,
                 byte[] dataToSend)

Creates a new instance of UDPClient

Parameters:

serverHostName - host name of the UDP server

serverPort - UDP port on server

handler - an RequestListener object for processing messages

dataToSend - in array of bytes

UDPClient

public UDPClient(RequestListener handler)

UDPClient

public UDPClient(java.lang.String serverHostName,
                 int serverPort,
                 RequestListener handler)

Creates a new instance of UDPClient

Parameters:

serverHostName - host name of the UDP server

serverPort - UDP port on server

Method Detail

runAction

public void runAction()
               throws AutoMedException

Implement UDP communication process

Specified by:

runAction in interface Threadable

Specified by:

runAction in class AbstractClient

Throws:

AutoMedException

receiveDatagram

public static java.net.DatagramPacket receiveDatagram(java.net.DatagramSocket socket)
                                               throws CommunicationException

Receive response packets in a separate thread

Throws:

CommunicationException

handleAction

public void handleAction()

Handle thread's interrupted action

Specified by:

handleAction in interface Threadable

Specified by:

handleAction in class AbstractClient

getReceivedData

public byte[] getReceivedData()

Get the data received from server

Returns:

byte[] an array of bytes representing the received data

sendDatagram

public static void sendDatagram(java.net.DatagramSocket dsock,
                                byte[] dataToSend,
                                java.net.InetAddress remoteAddress,
                                int remotePort)
                         throws CommunicationException

An utility method for sending a datagram given a socket. This method performs
fragmentation based on Constants.PACKET_SIZE as needed.

Throws:

CommunicationException