AlarmHandler.h

Go to the documentation of this file.
00001 
00002 // -*- mode: c++; c-basic-offset:4 -*-
00003 
00004 // This file is part of libdap, A C++ implementation of the OPeNDAP Data
00005 // Access Protocol.
00006 
00007 // Copyright (c) 2002,2003 OPeNDAP, Inc.
00008 // Author: James Gallagher <jgallagher@opendap.org>
00009 //
00010 // This library is free software; you can redistribute it and/or
00011 // modify it under the terms of the GNU Lesser General Public
00012 // License as published by the Free Software Foundation; either
00013 // version 2.1 of the License, or (at your option) any later version.
00014 //
00015 // This library is distributed in the hope that it will be useful,
00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00023 //
00024 // You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
00025 
00026 #ifndef alarm_handler_h
00027 #define alarm_handler_h
00028 
00029 #include <stdio.h>
00030 
00031 #include <string>
00032 
00033 #include "EventHandler.h"
00034 
00042 class AlarmHandler : public EventHandler
00043 {
00044 private:
00045     FILE *d_stream;  // Sink for the Error object.
00046     string d_version;
00047 
00048     // Ensure that d_stream gets initialized...
00049     AlarmHandler()
00050     {}
00051 
00052 public:
00055     AlarmHandler(FILE *s) : d_stream(s)
00056     {}
00057 
00058     virtual ~AlarmHandler()
00059     {
00060         fclose(d_stream);
00061     }
00062 
00075     virtual void handle_signal(int signum)
00076     {
00077         if (signum != SIGALRM)
00078             fprintf(stderr, "SIGALRM handler caught another signal!\n");
00079 #if 0
00080         // Use this code, or a variant, once we have reliable error delivery.
00081         fprintf(d_stream, "\n\n\n\n");
00082         Error e("The server has timed out. This happens when a request\n\
00083                 takes longer to process than the server's preset time-out value.\n\
00084                 Try making a request for a smaller amount of data. You can also contact\n\
00085                 the server's administrator and request that the time-out value be increased.");
00086         e.print(d_stream);
00087 #endif
00088         exit(1);
00089     }
00090 
00091 };
00092 
00093 #endif

Generated on Wed Jun 27 12:56:38 2007 for libdap++ by  doxygen 1.4.7