BESDapHandlerException.cc

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00001 // BESDapHandlerException.cc
00002 
00003 // This file is part of bes, A C++ back-end server implementation framework
00004 // for the OPeNDAP Data Access Protocol.
00005 
00006 // Copyright (c) 2004,2005 University Corporation for Atmospheric Research
00007 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
00008 //
00009 // This library is free software; you can redistribute it and/or
00010 // modify it under the terms of the GNU Lesser General Public
00011 // License as published by the Free Software Foundation; either
00012 // version 2.1 of the License, or (at your option) any later version.
00013 // 
00014 // This library is distributed in the hope that it will be useful,
00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017 // Lesser General Public License for more details.
00018 // 
00019 // You should have received a copy of the GNU Lesser General Public
00020 // License along with this library; if not, write to the Free Software
00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 //
00023 // You can contact University Corporation for Atmospheric Research at
00024 // 3080 Center Green Drive, Boulder, CO 80301
00025  
00026 // (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
00027 // Please read the full copyright statement in the file COPYRIGHT_UCAR.
00028 //
00029 // Authors:
00030 //      pwest       Patrick West <pwest@ucar.edu>
00031 //      jgarcia     Jose Garcia <jgarcia@ucar.edu>
00032 
00033 #include <sstream>
00034 
00035 using std::ostringstream;
00036 
00037 #include "BESDapHandlerException.h"
00038 #include "BESContextManager.h"
00039 #include "BESSilentInfo.h"
00040 
00050 int
00051 BESDapHandlerException::handleException( BESException &e,
00052                                          BESDataHandlerInterface &dhi )
00053 {
00054     // If we are handling errors in a dap2 context, then convert all
00055     // exceptions into a libdap Error and print it to the output stream.
00056     // from the data handler interface. This will be
00057     // like a non-buffered response to a request.
00058     bool found = false ;
00059     string context =
00060         BESContextManager::TheManager()->get_context( "errors", found ) ;
00061     if( context == "dap2" )
00062     {
00063         ErrorCode ec = unknown_error ;
00064         BESDapHandlerException *de = dynamic_cast<BESDapHandlerException*>( &e);
00065         if( de )
00066         {
00067             ec = de->get_error_code() ;
00068         }
00069         Error new_e( ec, e.get_message() ) ;
00070         new_e.print( dhi.get_output_stream() ) ;
00071 
00072         /* in order to not have anything transmitted during the transmit
00073          * phase, create a silent informational object for the error info.
00074          */
00075         dhi.error_info = new BESSilentInfo() ;
00076         return e.get_return_code() ;
00077     }
00078     else
00079     {
00080         // If we are not in a dap2 context and the exception is a dap
00081         // handler exception, then convert the error message to include the
00082         // error code. If it is or is not a dap exception, we simply return
00083         // that the exception was not handled.
00084         BESDapHandlerException *de = dynamic_cast<BESDapHandlerException*>( &e);
00085         if( de )
00086         {
00087             ostringstream s;
00088             s << "libdap exception building response"
00089                 << ": error_code = " << de->get_error_code()
00090                 << ": " << de->get_message() ;
00091             e.set_message( s.str() ) ;
00092         }
00093     }
00094     return BES_EXECUTED_OK ;
00095 }
00096 

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