ShowBesKeyResponseHandler.cc

// -*- mode: c++; c-basic-offset:4 -*-
//
// ShowBesKeyResponseHandler.cc
//
// This file is part of the BES default command set
//
// Copyright (c) 2018 OPeNDAP, Inc.
// Author: Nathan Potter <ndp@opendap.org>
//
// 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 OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
// Please read the full copyright statement in the file COPYRIGHT_URI.
//
 
#include "config.h"
 
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <time.h>
 
#include <cerrno>
#include <cstring>
 
#include <sstream>
#include <fstream>
 
#include "ShowBesKeyCommand.h"
#include "ShowBesKeyResponseHandler.h"
 
#include "BESDebug.h"
#include "BESError.h"
#include "BESInfo.h"
#include "BESInfoList.h"
#include "BESDataNames.h"
#include "TheBESKeys.h"
 
#include "BESStopWatch.h"
 
using namespace std;
 
const auto MODULE = "bes";
#define prolog std::string("ShowBesKeyResponseHandler::").append(__func__).append("() - ")
 
ShowBesKeyResponseHandler::ShowBesKeyResponseHandler(const string &name) :
    BESResponseHandler(name)
{
}
 
ShowBesKeyResponseHandler::~ShowBesKeyResponseHandler()
{
}

void ShowBesKeyResponseHandler::execute(BESDataHandlerInterface &dhi)
{
 
    BES_STOPWATCH_START_DHI(MODULE, prolog + "Timing", &dhi);
 
    BESInfo *info = BESInfoList::TheList()->build_info();
    d_response_object = info;
 
    string requested_bes_key = dhi.data[BES_KEY];
 
    BESDEBUG(SBK_DEBUG_KEY, __func__ << "() - requested key: " << requested_bes_key << endl);
 
    vector<string> key_values;
    getBesKeyValue(requested_bes_key, key_values);
 
    map<string, string, std::less<>> attrs;
 
    attrs[KEY] = requested_bes_key;
 
    info->begin_response(SHOW_BES_KEY_RESPONSE_STR, &attrs, dhi);
 
    // I think we can replace/remove 'emptyAttrs' and pass nullptr in its place.
    // jhrg 11/26/18
    map<string, string, std::less<>> emptyAttrs;
    for(unsigned long i = 0; i < key_values.size(); ++i)
        info->add_tag("value", key_values[i], &emptyAttrs);
 
    // end the response object
    info->end_response();
 
}

void ShowBesKeyResponseHandler::transmit(BESTransmitter *transmitter, BESDataHandlerInterface &dhi)
{
    if (d_response_object) {
        BESInfo *info = dynamic_cast<BESInfo *>(d_response_object);
        if (!info) throw BESInternalError("cast error", __FILE__, __LINE__);
        info->transmit(transmitter, dhi);
    }
}

void ShowBesKeyResponseHandler::dump(ostream &strm) const
{
    strm << BESIndent::LMarg << "ShowBesKeyResponseHandler::dump - (" << (void *) this << ")" << std::endl;
    BESIndent::Indent();
    BESResponseHandler::dump(strm);
    BESIndent::UnIndent();
}
 
BESResponseHandler *
ShowBesKeyResponseHandler::ShowBesKeyResponseBuilder(const string &name)
{
    return new ShowBesKeyResponseHandler(name);
}
 
void ShowBesKeyResponseHandler::getBesKeyValue(string key,  vector<string> &values)
{
    bool found;
 
    TheBESKeys::TheKeys()->get_values(key, values, found);
    if (!found) {
        BESDEBUG(SBK_DEBUG_KEY, __func__ << "() Failed to located BES key '" << key << "'" << endl);
        throw BESError("Ouch! The Key name '"+key+"' was not found in BESKeys",BES_NOT_FOUND_ERROR, __FILE__, __LINE__);
   }
}