public SlaveListener(DFSClient dfs) {
		int port = Configuration.SERVER_PORT;
		try {
			this.serverSocket = new ServerSocket(port);
			System.out.println("DFS listening on port " + port);

		} catch (IOException e) {
			System.out.println("Cannot listen on port " + port);
			e.printStackTrace();
		}
		this.dfs = dfs;
	}