libjava/gnu/classpath/jdwp/transport/SocketTransport.java

   1 /* SocketTransport.java -- a socket transport
   2    Copyright (C) 2005 Free Software Foundation
   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., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 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 terms of your choice, provided that you also meet, for each linked
  32 independent module, the terms and conditions of the license of that
  33 module.  An independent module is a module which is not derived from
  34 or based on this library.  If you modify this library, you may extend
  35 this exception to your version of the library, but you are not
  36 obligated to do so.  If you do not wish to do so, delete this
  37 exception statement from your version. */
  38
  39
  40 package gnu.classpath.jdwp.transport;
  41
  42 import gnu.classpath.jdwp.transport.ITransport;
  43 import gnu.classpath.jdwp.transport.TransportException;
  44
  45 import java.io.InputStream;
  46 import java.io.IOException;
  47 import java.io.OutputStream;
  48 import java.net.ServerSocket;
  49 import java.net.Socket;
  50 import java.util.HashMap;
  51
  52 import javax.net.ServerSocketFactory;
  53 import javax.net.SocketFactory;
  54
  55 /**
  56  * A socket-based transport. This transport uses
  57  * configury string that looks like "name=dt_socket,
  58  * address=localhost:1234,server=y".
  59  *
  60  * @author Keith Seitz <keiths@redhat.com>
  61  */
  62 class SocketTransport
  63   implements ITransport
  64 {
  65   /**
  66    * Name of this transport
  67    */
  68   public static final String NAME = "dt_socket";
  69
  70   // Configure properties
  71   private static final String _PROPERTY_ADDRESS = "address";
  72   private static final String _PROPERTY_SERVER = "server";
  73
  74   // Port number
  75   private int _port;
  76
  77   // Host name
  78   private String _host;
  79
  80   // Are we acting as a server?
  81   private boolean _server = false;
  82
  83   // Socket
  84   private Socket _socket;
  85
  86   /**
  87    * Setup the connection configuration from the given properties
  88    *
  89    * @param  properties  the properties of the JDWP session
  90    * @throws TransportException for any configury errors
  91    */
  92   public void configure (HashMap properties)
  93     throws TransportException
  94   {
  95     // Get address [form: "hostname:port"]
  96     String p = (String) properties.get (_PROPERTY_ADDRESS);
  97     if (p != null)
  98       {
  99         String[] s = p.split (":");
 100         if (s.length == 2)
 101           {
 102             _host = s[0];
 103             _port = Integer.parseInt (s[1]);
 104           }
 105       }
 106
 107     // Get server [form: "y" or "n"]
 108     p = (String) properties.get (_PROPERTY_SERVER);
 109     if (p != null)
 110       {
 111         if (p.toLowerCase().equals ("y"))
 112           _server = true;
 113       }
 114   }
 115
 116   /**
 117    * Initialize this socket connection. This includes
 118    * connecting to the host (or listening for it).
 119    *
 120    * @throws TransportException if a transport-related error occurs
 121    */
 122   public void initialize ()
 123     throws TransportException
 124   {
 125     try
 126       {
 127         if (_server)
 128           {
 129             // Get a server socket
 130             ServerSocketFactory ssf = ServerSocketFactory.getDefault ();
 131             ServerSocket ss = ssf.createServerSocket (_port, 1);
 132             _socket = ss.accept ();
 133           }
 134         else
 135           {
 136             // Get a client socket (the factory will connect it)
 137             SocketFactory sf = SocketFactory.getDefault ();
 138             _socket = sf.createSocket (_host, _port);
 139           }
 140       }
 141     catch (IOException ioe)
 142       {
 143         // This will grab UnknownHostException, too.
 144         throw new TransportException (ioe);
 145       }
 146   }
 147
 148   /**
 149    * Returns an <code>InputStream</code> for the transport
 150    *
 151    * @throws IOException if an I/O error occurs creating the stream
 152    *                     or the socket is not connected
 153    */
 154   public InputStream getInputStream ()
 155     throws IOException
 156   {
 157     return _socket.getInputStream ();
 158   }
 159
 160   /**
 161    * Returns an <code>OutputStream</code> for the transport
 162    *
 163    * @throws IOException if an I/O error occurs creating the stream
 164    *                     or the socket is not connected
 165    */
 166   public OutputStream getOutputStream ()
 167     throws IOException
 168   {
 169     return _socket.getOutputStream ();
 170   }
 171 }