network structure

app/src/main/java/network/server/Server.java

@@ -0,0 +1,28 @@
+package network.server;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Server {
+
+	final ServerSocket serverSocket;
+	final List<ServerConnexion> connexions;
+	private final ServerThread thread;
+
+	public Server(short port) throws IOException {
+		this.serverSocket = new ServerSocket(port);
+		this.connexions = new ArrayList<>();
+		this.thread = new ServerThread(this);
+		this.thread.start();
+	}
+
+	public void stop() {
+		this.thread.cancel();
+		for (ServerConnexion connexion : this.connexions) {
+			connexion.close();
+		}
+	}
+
+}

app/src/main/java/network/server/ServerConnexion.java

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+package network.server;
+
+import java.io.IOException;
+import java.net.Socket;
+import java.util.Random;
+
+import network.Connexion;
+import network.packets.ConnexionInfoPacket;
+import network.packets.KeepAlivePacket;
+
+public class ServerConnexion extends Connexion{
+
+	public ServerConnexion(Socket socket) throws IOException {
+		super(socket);
+		System.out.println("Bonjour le client !");
+		sendKeepAlive();
+	}
+
+	public void sendKeepAlive() throws IOException {
+		Random r = new Random();
+		sendPacket(new KeepAlivePacket(r.nextLong()));
+	}
+
+	@Override
+	public void visit(ConnexionInfoPacket packet) {
+		// TODO Auto-generated method stub
+		throw new UnsupportedOperationException("Unimplemented method 'visit'");
+	}
+
+	@Override
+	public void visit(KeepAlivePacket packet) {
+		System.out.println("Je l'ai reçu !");
+	}
+	
+}

app/src/main/java/network/server/ServerThread.java

@@ -0,0 +1,36 @@
+package network.server;
+
+import java.io.IOException;
+import java.net.Socket;
+
+public class ServerThread extends Thread {
+
+	private final Server server;
+
+	public ServerThread(Server server) {
+		this.server = server;
+	}
+
+	public void cancel() {
+		try {
+			this.server.serverSocket.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		interrupt();
+	}
+
+	@Override
+	public void run() {
+		try {
+			while(!interrupted()) {
+				Socket newConnection = this.server.serverSocket.accept();
+				ServerConnexion serverConnection = new ServerConnexion(newConnection);
+				this.server.connexions.add(serverConnection);
+			}
+		} catch(IOException e) {
+			// e.printStackTrace();
+		}
+	}
+
+}