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ServerThread.d

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00001 /*******************************************************************************
00002 
00003         @file ServerThread.d
00004         
00005         Copyright (C) 2004 Kris Bell
00006         
00007         This software is provided 'as-is', without any express or implied
00008         warranty. In no event will the authors be held liable for damages
00009         of any kind arising from the use of this software.
00010         
00011         Permission is hereby granted to anyone to use this software for any 
00012         purpose, including commercial applications, and to alter it and/or 
00013         redistribute it freely, subject to the following restrictions:
00014         
00015         1. The origin of this software must not be misrepresented; you must 
00016            not claim that you wrote the original software. If you use this 
00017            software in a product, an acknowledgment within documentation of 
00018            said product would be appreciated but is not required.
00019 
00020         2. Altered source versions must be plainly marked as such, and must 
00021            not be misrepresented as being the original software.
00022 
00023         3. This notice may not be removed or altered from any distribution
00024            of the source.
00025 
00026 
00027                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00028 
00029         
00030         @version        Initial version, April 2004      
00031         @author         Kris
00032 
00033 
00034 *******************************************************************************/
00035 
00036 module mango.utils.ServerThread;
00037 
00038 private import std.thread;
00039 
00040 private import  mango.io.Conduit,
00041                 mango.io.Exception,
00042                 mango.io.ServerSocket,
00043                 mango.io.SocketConduit;
00044 
00045 private import  mango.utils.AbstractServer;
00046 
00047 /******************************************************************************
00048 
00049         Subclasses Thread to provide the basic server-thread loop. This
00050         functionality could also be implemented as a delegate, however, 
00051         we also wish to subclass in order to add thread-local data (see
00052         HttpThread).
00053 
00054 ******************************************************************************/
00055 
00056 class ServerThread : Thread
00057 {
00058         ServerSocket    socket;
00059         AbstractServer  server;
00060 
00061         /**********************************************************************
00062 
00063                 Construct a ServerThread for the given Server, upon the 
00064                 specified socket
00065                  
00066         **********************************************************************/
00067 
00068         this (AbstractServer server, ServerSocket socket)
00069         {
00070                 this.server = server;
00071                 this.socket = socket;
00072         }
00073 
00074         /**********************************************************************
00075 
00076                 Execute this thread until the Server says to halt. Each
00077                 thread waits in the socket.accept() state, waiting for
00078                 a connection request to arrive. Upon selection, a thread
00079                 dispatches the request via the request service-handler
00080                 and, upon completion, enters the socket.accept() state
00081                 once more.
00082 
00083         **********************************************************************/
00084 
00085         override int run()
00086         {
00087                 while (true)
00088                        try {
00089                            // should we bail out?
00090                            if (Socket.isCancelled)
00091                                return 0;
00092 
00093                            // wait for a socket connection
00094                            SocketConduit sc = socket.accept ();
00095 
00096                            // did we get a valid response?
00097                            if (sc)
00098                                // yep: process this request
00099                                server.service (this, sc);
00100                            else
00101                               // server may be halting ...
00102                               if (! Socket.isCancelled)
00103                                     server.getLogger.error ("Socket accept() failed");
00104 
00105                            } catch (IOException x)
00106                                    {
00107                                    server.getLogger.error ("IOException: "~x.toString);
00108                                    }
00109                             catch (Object x)
00110                                    {
00111                                    server.getLogger.fatal ("Exception: "~x.toString);
00112                                    }
00113         }
00114 }

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