content: /*
   * Copyright (C) 2013 Glyptodon LLC
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  package org.glyptodon.guacamole.net;
  
  
  import org.glyptodon.guacamole.io.GuacamoleReader;
  import org.glyptodon.guacamole.io.ReaderGuacamoleReader;
  import org.glyptodon.guacamole.io.WriterGuacamoleWriter;
  import org.glyptodon.guacamole.io.GuacamoleWriter;
  import java.io.IOException;
  import java.net.InetAddress;
  import java.net.Socket;
  
  import java.io.InputStreamReader;
  
  import java.io.OutputStreamWriter;
  import java.net.InetSocketAddress;
  import java.net.SocketAddress;
  import java.net.SocketTimeoutException;
  import org.glyptodon.guacamole.GuacamoleException;
  import org.glyptodon.guacamole.GuacamoleServerException;
  import org.glyptodon.guacamole.GuacamoleUpstreamTimeoutException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Provides abstract socket-like access to a Guacamole connection over a given
   * hostname and port.
   *
   * @author Michael Jumper
   */
  public class InetGuacamoleSocket implements GuacamoleSocket {
  
      /**
       * Logger for this class.
       */
      private Logger logger = LoggerFactory.getLogger(InetGuacamoleSocket.class);
  
      /**
       * The GuacamoleReader this socket should read from.
       */
      private GuacamoleReader reader;
  
      /**
       * The GuacamoleWriter this socket should write to.
       */
      private GuacamoleWriter writer;
  
      /**
       * The number of milliseconds to wait for data on the TCP socket before
       * timing out.
       */
      private static final int SOCKET_TIMEOUT = 15000;
  
      /**
       * The TCP socket that the GuacamoleReader and GuacamoleWriter exposed
       * by this class should affect.
       */
      private Socket sock;
  
      /**
       * Creates a new InetGuacamoleSocket which reads and writes instructions
       * to the Guacamole instruction stream of the Guacamole proxy server
       * running at the given hostname and port.
       *
       * @param hostname The hostname of the Guacamole proxy server to connect to.
       * @param port The port of the Guacamole proxy server to connect to.
       * @throws GuacamoleException If an error occurs while connecting to the
       *                            Guacamole proxy server.
       */
      public InetGuacamoleSocket(String hostname, int port) throws GuacamoleException {
  
          try {
  
              logger.debug("Connecting to guacd at {}:{}.", hostname, port);
  
              // Get address
              SocketAddress address = new InetSocketAddress(
                      InetAddress.getByName(hostname),
                      port
              );
  
              // Connect with timeout
              sock = new Socket();
              sock.connect(address, SOCKET_TIMEOUT);
  
              // Set read timeout
              sock.setSoTimeout(SOCKET_TIMEOUT);
  
              // On successful connect, retrieve I/O streams
              reader = new ReaderGuacamoleReader(new InputStreamReader(sock.getInputStream(),   "UTF-8"));
              writer = new WriterGuacamoleWriter(new OutputStreamWriter(sock.getOutputStream(), "UTF-8"));
  
          }
          catch (SocketTimeoutException e) {
              throw new GuacamoleUpstreamTimeoutException("Connection timed out.", e);
          }
          catch (IOException e) {
              throw new GuacamoleServerException(e);
          }
  
      }
  
      @Override
      public void close() throws GuacamoleException {
          try {
              logger.debug("Closing socket to guacd.");
              sock.close();
          }
          catch (IOException e) {
              throw new GuacamoleServerException(e);
          }
      }
  
      @Override
      public GuacamoleReader getReader() {
          return reader;
      }
  
      @Override
      public GuacamoleWriter getWriter() {
          return writer;
      }
  
      @Override
      public boolean isOpen() {
          return !sock.isClosed();
      }
  
  }
  