BESWWWResponseHandler.cc

// BESWWWResponseHandler.cc
 
// This file is part of bes, A C++ back-end server implementation framework
// for the OPeNDAP Data Access Protocol.
 
// Copyright (c) 2004,2005 University Corporation for Atmospheric Research
// Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact University Corporation for Atmospheric Research at
// 3080 Center Green Drive, Boulder, CO 80301
 
// (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
// Please read the full copyright statement in the file COPYRIGHT_UCAR.
//
// Authors:
//      pwest       Patrick West <pwest@ucar.edu>
//      jgarcia     Jose Garcia <jgarcia@ucar.edu>
 
#include "config.h"
 
#include <libdap/DDS.h>
 
#include "GlobalMetadataStore.h"
#include "BESWWWResponseHandler.h"
#include "BESRequestHandlerList.h"
#include "BESDapNames.h"
#include "BESWWWNames.h"
#include "BESWWW.h"
#include "BESDDSResponse.h"
#include "BESTransmitter.h"
 
#include "BESWWWTransmit.h"
 
using namespace libdap;
using namespace bes;
 
BESWWWResponseHandler::BESWWWResponseHandler( const string &name )
:  BESResponseHandler(name)
{
}
 
BESWWWResponseHandler::~BESWWWResponseHandler()
{
}

void
 BESWWWResponseHandler::execute(BESDataHandlerInterface & dhi)
{
    dhi.action_name = WWW_RESPONSE_STR;
 
    dhi.action_name = DDX_RESPONSE_STR;
 
    GlobalMetadataStore *mds = GlobalMetadataStore::get_instance();
    GlobalMetadataStore::MDSReadLock lock;
 
    dhi.first_container();
    if (mds) lock = mds->is_dds_available(*(dhi.container));
 
    if (mds && lock()) {
        DDS *dds = mds->get_dds_object(dhi.container->get_relative_name());
        BESDDSResponse *bdds = new BESDDSResponse(dds);
 
#if FORCE_DAP_VERSION_TO_3_2
        dds->set_dap_version("3.2");
#else
        // These values are read from the BESContextManager by the BESDapResponse ctor
        if (!bdds->get_dap_client_protocol().empty()) {
            dds->set_dap_version(bdds->get_dap_client_protocol());
        }
#endif
        dds->set_request_xml_base(bdds->get_request_xml_base());
 
        d_response_object = new BESWWW(bdds);
        dhi.action = WWW_RESPONSE;
    }
    else {
        // Make a blank DDS. It is the responsibility of the specific request
        // handler to set the BaseTypeFactory. It is set to NULL here
        DDS *dds = new DDS(NULL, "virtual");
 
        BESDDSResponse *bdds = new BESDDSResponse(dds);
        d_response_name = DDS_RESPONSE;
        dhi.action = DDS_RESPONSE;
 
#if FORCE_DAP_VERSION_TO_3_2
        dds->set_dap_version("3.2");
#else
        if (!bdds->get_dap_client_protocol().empty()) {
            dds->set_dap_version(bdds->get_dap_client_protocol());
        }
#endif
 
        dds->set_request_xml_base(bdds->get_request_xml_base());
 
        d_response_object = bdds;
 
        BESRequestHandlerList::TheList()->execute_each(dhi);
 
        if (mds) {
            dhi.first_container();  // must reset container; execute_each() iterates over all of them
            mds->add_responses(static_cast<BESDDSResponse*>(d_response_object)->get_dds(),
                dhi.container->get_relative_name());
        }
 
        d_response_object = new BESWWW(bdds);
        dhi.action = WWW_RESPONSE;
    }
 
    // Original code follows
#if 0
    // Create the DDS.
    // NOTE: It is the responsibility of the specific request handler to set
    // the BaseTypeFactory. It is set to NULL here
    DDS *dds = new DDS(NULL, "virtual");
    BESDDSResponse *bdds = new BESDDSResponse(dds);
    d_response_object = bdds;
    d_response_name = DDS_RESPONSE;
    dhi.action = DDS_RESPONSE;
    BESRequestHandlerList::TheList()->execute_each(dhi);
#if 0
    // Fill the DAS
    DAS *das = new DAS;
    BESDASResponse *bdas = new BESDASResponse(das);
    d_response_object = bdas;
    d_response_name = DAS_RESPONSE;
    dhi.action = DAS_RESPONSE;
    BESRequestHandlerList::TheList()->execute_each(dhi);
#endif
    BESWWW *www = new BESWWW(/*bdas,*/bdds);
    d_response_object = www;
    dhi.action = WWW_RESPONSE;
#endif
 
}

void BESWWWResponseHandler::transmit(BESTransmitter * transmitter,
                                     BESDataHandlerInterface & dhi)
{
    if (d_response_object) {
        transmitter->send_response(WWW_TRANSMITTER, d_response_object, dhi);
    }
}
 
BESResponseHandler *BESWWWResponseHandler::
WWWResponseBuilder( const string &handler_name )
{
    return new BESWWWResponseHandler( handler_name ) ;
}