Server

package de.cloud.tammo.communication;

import java.io.*;
import java.net.*;
import java.util.HashMap;

/**
 * Created by Tammo on 26.06.2017.
 */
public class Server {

    private int port;
    private Thread t;
    public ServerSocket serversocket;
    private HashMap<String, Handler> handler;
    private boolean running = false;

    public Server(int port) {
        this.port = port;
        handler = new HashMap<>();
    }

    public void start() {
        t = new Thread(new Runnable() {

            @Override
            public void run() {
                try {
                    serversocket = new ServerSocket(port);
                    running = true;
                    while (running) {
                        Socket s = serversocket.accept();
                        ObjectInputStream ois = new ObjectInputStream(s.getInputStream());
                        try {
                            Packet p = (Packet) ois.readObject();
                            handler.get(p.getName()).handle(p, s);
                        } catch (ClassNotFoundException e) {
                            e.printStackTrace();
                        }
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });
        t.start();
    }

    public void stop() {
        running = false;
        try {
            serversocket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        t.interrupt();
    }

    public void sendPacketWithTryCatch(Packet p, String host, int port) throws IOException, ConnectException {
        Socket s = new Socket(host, port);
        ObjectOutputStream oos = new ObjectOutputStream(s.getOutputStream());
        oos.writeObject(p);
        s.close();
    }

    public void sendPacket(Packet p, String host, int port){
        try {
            Socket s = new Socket(host, port);
            ObjectOutputStream oos = new ObjectOutputStream(s.getOutputStream());
            oos.writeObject(p);
            s.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void addHandler(String packetname, Handler h) {
        this.handler.put(packetname, h);
    }

    public HashMap<String, Handler> getHandler() {
        return handler;
    }

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    public boolean getRunningState() {
        return this.running;
    }
}