001    /* RemoteServer.java --
002       Copyright (c) 1996, 1997, 1998, 1999, 2004, 2006
003       Free Software Foundation, Inc.
004    
005    This file is part of GNU Classpath.
006    
007    GNU Classpath is free software; you can redistribute it and/or modify
008    it under the terms of the GNU General Public License as published by
009    the Free Software Foundation; either version 2, or (at your option)
010    any later version.
011    
012    GNU Classpath is distributed in the hope that it will be useful, but
013    WITHOUT ANY WARRANTY; without even the implied warranty of
014    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015    General Public License for more details.
016    
017    You should have received a copy of the GNU General Public License
018    along with GNU Classpath; see the file COPYING.  If not, write to the
019    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
020    02110-1301 USA.
021    
022    Linking this library statically or dynamically with other modules is
023    making a combined work based on this library.  Thus, the terms and
024    conditions of the GNU General Public License cover the whole
025    combination.
026    
027    As a special exception, the copyright holders of this library give you
028    permission to link this library with independent modules to produce an
029    executable, regardless of the license terms of these independent
030    modules, and to copy and distribute the resulting executable under
031    terms of your choice, provided that you also meet, for each linked
032    independent module, the terms and conditions of the license of that
033    module.  An independent module is a module which is not derived from
034    or based on this library.  If you modify this library, you may extend
035    this exception to your version of the library, but you are not
036    obligated to do so.  If you do not wish to do so, delete this
037    exception statement from your version. */
038    
039    
040    package java.rmi.server;
041    
042    import gnu.java.rmi.server.RMIIncomingThread;
043    
044    import java.io.OutputStream;
045    import java.io.PrintStream;
046    
047    /**
048     * A common superclass for the server implementations.
049     */
050    public abstract class RemoteServer
051        extends RemoteObject
052    {
053      private static final long serialVersionUID = - 4100238210092549637L;
054    
055      /**
056       * Does nothing, delegates to super().
057       */
058      protected RemoteServer()
059      {
060        super();
061      }
062    
063      /**
064       * Does nothing, delegates to super(ref).
065       */
066      protected RemoteServer(RemoteRef ref)
067      {
068        super(ref);
069      }
070    
071      /**
072       * Get the host of the calling client. The current thread must be an instance
073       * of the {@link RMIIncomingThread}.
074       *
075       * @return the client host address
076       *
077       * @throws ServerNotActiveException if the current thread is not an instance
078       * of the RMIIncomingThread.
079       */
080      public static String getClientHost() throws ServerNotActiveException
081      {
082        Thread currThread = Thread.currentThread();
083        if (currThread instanceof RMIIncomingThread)
084          {
085            RMIIncomingThread incomingThread = (RMIIncomingThread) currThread;
086            return incomingThread.getClientHost();
087          }
088        else
089          {
090            throw new ServerNotActiveException(
091              "Unknown client host - current thread not instance of 'RMIIncomingThread'");
092          }
093      }
094    
095      /**
096       * Set the stream for logging RMI calls.
097       *
098       * @param out the stream to set or null to turn the logging off.
099       */
100      public static void setLog(OutputStream out)
101      {
102        throw new Error("Not implemented");
103      }
104    
105      /**
106       * Get the stream for logging RMI calls.
107       *
108       * @return the associated stream.
109       */
110      public static PrintStream getLog()
111      {
112        throw new Error("Not implemented");
113      }
114    
115    }