import java.awt.Color;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;
/**
* class for an individual connection to a client. allows to send messages to
* this client and handles incoming messages.
*/
public class Connection extends Thread implements ConnectionInterface {
protected Socket socket;
protected ObjectInputStream inputStream;
protected ObjectOutputStream outputStream;
protected Server server;
protected boolean connectionOpen = true;
public Connection(Socket s, Server server) {
this.socket = s;
try {
inputStream = new ObjectInputStream((s.getInputStream()));
outputStream = new ObjectOutputStream((s.getOutputStream()));
} catch (IOException e) {
e.printStackTrace();
}
this.server = server;
}
protected void sendConnectedMessage(String clientName) {
TextMessage connectedMessage = new TextMessage(clientName + " has joined.");
connectedMessage.setSender("Server");
server.broadcast(connectedMessage);
System.out.println(connectedMessage.getContent());
}
protected void sendDisconnectedMessage(String clientName) {
TextMessage message = new TextMessage(clientName + " has left.");
server.removeConnection(this);
server.broadcast(message);
}
/**
* waits for incoming messages from the socket
*/
public void run() {
String clientName = socket.getInetAddress().toString();
try {
sendConnectedMessage(clientName);
while (connectionOpen) {
try {
Object msg = inputStream.readObject();
handleIncomingMessage(clientName, msg);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
} catch (IOException ex) {
//ex.printStackTrace();
} finally {
sendDisconnectedMessage(clientName);
try {
socket.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
/**
* decides what to do with incoming messages
*
* @param name
* name of the client
* @param msg
* received message
*/
protected void handleIncomingMessage(String name, Object msg) {
if (msg instanceof TextMessage) {
((TextMessage)msg).setSender(name);
server.broadcast((TextMessage)msg);
}
}
public void send(TextMessage msg) {
try {
synchronized (outputStream) {
System.out.println("CONNECTION SEND: " + msg.getContent());
outputStream.writeObject(msg);
}
outputStream.flush();
} catch (IOException ex) {
connectionOpen = false;
}
}
}