public void run(){
        synchronized(this){
            this.runningThread = Thread.currentThread();
        }
        openServerSocket();
        while(! isStopped()){
            Socket clientSocket = null;
            try {
                clientSocket = this.serverSocket.accept();
            } catch (IOException e) {
                if(isStopped()) {
                    System.out.println("Server Stopped.") ;
                    return;
                }
                throw new RuntimeException(
                    "Error accepting client connection", e);
            }
            this.threadPool.execute(
                new WorkerRunnable(clientSocket,
                    "Thread Pooled Server"));
        }
        this.threadPool.shutdown();
        System.out.println("Server Stopped.") ;
    }