console helper

package ua.org.msangel.r;

import java.io.IOException;

public class ServerManager {
    private static final int DEFAULT_PORT = 8080;
    private int port;

    public static String newline = System.getProperty("line.separator");
    Server serverThread;

    public ServerManager() {
        this(DEFAULT_PORT);
    }

    public ServerManager(int port) {
        this.port = port;
        serverThread = new Server(port);
    }

    synchronized private void startServer() {

        if (serverThread.isInterrupted()
                || serverThread.getState() == Thread.State.TERMINATED) {
            serverThread = new Server(this.port);
        }

        if (serverThread.getState() == Thread.State.NEW) {
            serverThread.start();
        } else {
            // System.out.println("Unknow thread state:"+serverThread.getState());
            // Unknow thread state:TIMED_WAITING
            // if already run
        }
    }

    synchronized private void stopServer() {
        if (serverThread.isAlive()) {
            serverThread.disconnectAll();
            serverThread.interrupt();
            serverThread.stop();
        }
    }

    synchronized private void restartServer() {
        this.stopServer();
        this.startServer();
    }

    synchronized private String getServerStatus() {
        return serverThread.getStatus();
    }

    public void startMonitor() {
        char c = '0';
        while (c != '5') {
            System.out.println("Available actions:" + newline + //
                    "1: Status" + newline + //
                    "2: Start" + newline + //
                    "3: Stop" + newline + //
                    "4: Restart" + newline + //
                    "5: Exit");
            try {
                int tmp = System.in.read();
                while (System.in.available() > 0) {
                    System.in.read();
                }
                c = (char) tmp;

            } catch (IOException e) {
                e.printStackTrace();
            }
            switch (c) {
            case '1':
                System.out.println(this.getServerStatus());
                break;
            case '2':
                this.startServer();
                break;
            case '3':
                this.stopServer();
                break;
            case '4':
                this.restartServer();
                break;
            case '5':
                System.out.println("exiting start");
                break;
            }
        }
        this.stopServer();
    }

    public static void main(String[] args) {
        ServerManager serverManager = new ServerManager();
        //serverManager.startMonitor();

        serverManager.test();
    }

    private void test() {
        System.out.println("begin of program");
        this.startServer();
        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("end of sleep");
        this.serverThread.interrupt();
        System.out.println("interrupt done ");
        this.serverThread.disconnectAll();
        System.out.println("set to null");
        System.out.println("end of program");
    }
}