/**
* BigBlueButton open source conferencing system - http://www.bigbluebutton.org/
*
* Copyright (c) 2012 BigBlueButton Inc. and by respective authors (see below).
*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* Foundation; either version 3.0 of the License, or (at your option) any later
* version.
*
* BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along
* with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
*
*/
package org.bigbluebutton.screenshare.client;
import java.net.*;
import java.io.*;
public class LifeLine {
private int port;
private ServerSocket serverSocket = null;
private Socket clientSocket = null;
private boolean connected = false;
private PrintWriter out = null;
private BufferedReader in = null;
private LifeLineListener listener = null;
private Thread lifeLineThread;
private LifeLineServer lifeLineServer;
public LifeLine(int port, LifeLineListener listener) {
this.port = port;
this.listener = listener;
}
public void listen() {
lifeLineServer = new LifeLineServer();
lifeLineThread = new Thread(lifeLineServer, "LifeLineServer");
lifeLineThread.start();
}
public void disconnect() {
lifeLineServer.close();
}
private void notifyListener(ExitCode reason) {
if (listener != null) listener.disconnected(reason);
}
private class LifeLineServer implements Runnable {
@Override
public void run() {
try {
serverSocket = new ServerSocket();
serverSocket.bind(new InetSocketAddress("127.0.0.1", port));
} catch (IOException e) {
System.err.println("Could not listen on port: " + port);
notifyListener(ExitCode.CANNOT_BIND_TO_LIFELINE_PORT);
}
try {
System.out.println("Starting listener on [" + serverSocket.getInetAddress() + ":" + port + "]");
clientSocket = serverSocket.accept();
clientSocket.setKeepAlive(true);
out = new PrintWriter(clientSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
String inputLine;
connected = true;
while ((inputLine = in.readLine()) != null) {
// do nothing
}
} catch (IOException e) {
System.out.println("IOException listener");
System.err.println("Accept failed.");
notifyListener(ExitCode.ERROR_ON_LIFELINE_CONNECTION);
}
close();
System.out.println("Stopped listener");
notifyListener(ExitCode.LIFELINE_CONNECTION_CLOSED);
}
public void close() {
try {
if (out != null) out.close();
if (in != null) in.close();
if (clientSocket != null) clientSocket.close();
if (serverSocket != null) serverSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}