libjava/classpath/examples/gnu/classpath/examples/CORBA/swing/x5/X5Server.java

   1 /* GameManagerAddressServer.java --
   2  Copyright (C) 2005 Free Software Foundation, Inc.
   3
   4  This file is part of GNU Classpath.
   5
   6  GNU Classpath is free software; you can redistribute it and/or modify
   7  it under the terms of the GNU General Public License as published by
   8  the Free Software Foundation; either version 2, or (at your option)
   9  any later version.
  10
  11  GNU Classpath is distributed in the hope that it will be useful, but
  12  WITHOUT ANY WARRANTY; without even the implied warranty of
  13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  General Public License for more details.
  15
  16  You should have received a copy of the GNU General Public License
  17  along with GNU Classpath; see the file COPYING.  If not, write to the
  18  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19  02110-1301 USA.
  20
  21  Linking this library statically or dynamically with other modules is
  22  making a combined work based on this library.  Thus, the terms and
  23  conditions of the GNU General Public License cover the whole
  24  combination.
  25
  26  As a special exception, the copyright holders of this library give you
  27  permission to link this library with independent modules to produce an
  28  executable, regardless of the license terms of these independent
  29  modules, and to copy and distribute the resulting executable under
  30  terms of your choice, provided that you also meet, for each linked
  31  independent module, the terms and conditions of the license of that
  32  module.  An independent module is a module which is not derived from
  33  or based on this library.  If you modify this library, you may extend
  34  this exception to your version of the library, but you are not
  35  obligated to do so.  If you do not wish to do so, delete this
  36  exception statement from your version. */
  37
  38
  39 package gnu.classpath.examples.CORBA.swing.x5;
  40
  41 import java.io.BufferedWriter;
  42 import java.io.File;
  43 import java.io.FileWriter;
  44 import java.io.IOException;
  45 import java.io.OutputStream;
  46 import java.net.InetAddress;
  47 import java.net.ServerSocket;
  48 import java.net.Socket;
  49
  50 /**
  51  * The main executable class of the game manager server.
  52  *
  53  * The manager address server returns the IOR address string of the game
  54  * manager. Hence the user does not need to enter the rather long IOR address
  55  * string and only needs to specify the host and port of the machine where the
  56  * game manager is running.
  57  *
  58  * The manager address server starts the main game manager as well.
  59  *
  60  * This server acts as a HTTP server that always returns the same response. This
  61  * primitive functionality is sufficient for its task.
  62  *
  63  * The more complex CORBA applications should use the name service instead. We
  64  * do not use the name service as this would require to start additional
  65  * external application, specific for the different java platforms.
  66  *
  67  * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
  68  */
  69 public class X5Server
  70 {
  71   /**
  72    * Start the game manager.
  73    */
  74   public static void main(String[] args)
  75   {
  76     // Start the game manager, write the IOR to the agreed location.
  77     OrbStarter.startManager(args);
  78
  79     if (!GameManagerImpl.ok)
  80       {
  81         System.out.println("Unable to start the game manager:");
  82         System.exit(1);
  83       }
  84
  85     // Print the IOR.
  86     System.out.println(GameManagerImpl.ior);
  87
  88     String manager_address = null;
  89
  90     // Start the game manager server.
  91     ServerSocket nameServer = null;
  92     try
  93       {
  94         nameServer = new ServerSocket(OrbStarter.MANAGER_NAMER_PORT);
  95
  96         System.out.println("The game manager is listening at:");
  97         manager_address = "http://"
  98           + InetAddress.getLocalHost().getHostAddress() + ":"
  99           + nameServer.getLocalPort();
 100
 101         System.out.println(manager_address);
 102
 103         System.out.println("Enter this address to the "
 104           + "input field of the game client.");
 105
 106         System.out.println("Use ^C to stop the manager.");
 107       }
 108     catch (Exception ex)
 109       {
 110         System.out.println("The port " + OrbStarter.MANAGER_NAMER_PORT
 111           + " is not available. The game manager namer will not start.");
 112         System.exit(1);
 113       }
 114
 115     // Write the IOR to the local file system.
 116     if (OrbStarter.WRITE_URL_TO_FILE != null)
 117       {
 118         try
 119           {
 120             File gmf = new File(OrbStarter.WRITE_URL_TO_FILE);
 121             FileWriter f = new FileWriter(gmf);
 122             BufferedWriter b = new BufferedWriter(f);
 123
 124             b.write(manager_address);
 125             b.close();
 126           }
 127         catch (IOException e)
 128           {
 129             System.out.println("Local filesystem not accessible."
 130               + "Read IOR from console.");
 131           }
 132       }
 133
 134     // Do forever.
 135     while (true)
 136       {
 137         try
 138           {
 139             Socket socket = nameServer.accept();
 140
 141             System.out.println("Connected.");
 142
 143             // Set the two minutes timeout.
 144             socket.setSoTimeout(1000 * 120);
 145
 146             OutputStream out = socket.getOutputStream();
 147
 148             int length = GameManagerImpl.ior.length();
 149
 150             StringBuilder b = new StringBuilder();
 151             b.append("HTTP/1.0 200 OK\r\n");
 152             b.append("Content-Length: " + length + "\r\n");
 153             b.append("Connection: close\r\n");
 154             b.append("Content-Type: text/plain; charset=UTF-8\r\n");
 155             b.append("\r\n");
 156
 157             b.append(GameManagerImpl.ior);
 158
 159             out.write(b.toString().getBytes("UTF-8"));
 160
 161             socket.shutdownOutput();
 162
 163             if (!socket.isClosed())
 164               socket.close();
 165
 166             System.out.println("Completed.");
 167           }
 168         catch (Exception exc)
 169           {
 170             exc.printStackTrace();
 171             System.out.println("Network problem.");
 172           }
 173       }
 174   }
 175 }