BESReturnManager.cc

// BESReturnManager.cc
 
// This file is part of bes, A C++ back-end server implementation framework
// for the OPeNDAP Data Access Protocol.
 
// Copyright (c) 2004-2009 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 <mutex>
 
#include "BESReturnManager.h"
 
using std::endl;
using std::ostream;
using std::string;
 
BESReturnManager *BESReturnManager::d_instance = nullptr;
std::once_flag d_euc_init_once;
 
BESReturnManager::BESReturnManager() {}
 
BESReturnManager::~BESReturnManager()
{
    BESReturnManager::Transmitter_iter i;
    BESTransmitter *t = 0;
    for (i = _transmitter_list.begin(); i != _transmitter_list.end(); i++) {
        t = (*i).second;
        delete t;
    }
}
 
bool BESReturnManager::add_transmitter(const string &name, BESTransmitter *transmitter)
{
    std::lock_guard<std::recursive_mutex> lock_me(d_cache_lock_mutex);
 
    if (find_transmitter(name) == 0) {
        _transmitter_list[name] = transmitter;
        return true;
    }
    return false;
}
 
bool BESReturnManager::del_transmitter(const string &name)
{
    std::lock_guard<std::recursive_mutex> lock_me(d_cache_lock_mutex);
 
    bool ret = false;
    BESReturnManager::Transmitter_iter i;
    i = _transmitter_list.find(name);
    if (i != _transmitter_list.end()) {
        BESTransmitter *obj = (*i).second;
        _transmitter_list.erase(i);
        if (obj) delete obj;
        ret = true;
    }
    return ret;
}
 
BESTransmitter *
BESReturnManager::find_transmitter(const string &name)
{
    std::lock_guard<std::recursive_mutex> lock_me(d_cache_lock_mutex);
 
    BESReturnManager::Transmitter_citer i;
    i = _transmitter_list.find(name);
    if (i != _transmitter_list.end()) {
        return (*i).second;
    }
    return 0;
}

void BESReturnManager::dump(ostream &strm) const
{
    std::lock_guard<std::recursive_mutex> lock_me(d_cache_lock_mutex);
 
    strm << BESIndent::LMarg << "BESReturnManager::dump - (" << (void *) this << ")" << endl;
    BESIndent::Indent();
    if (_transmitter_list.size()) {
        strm << BESIndent::LMarg << "registered transmitters:" << endl;
        BESIndent::Indent();
        BESReturnManager::Transmitter_citer i = _transmitter_list.begin();
        BESReturnManager::Transmitter_citer ie = _transmitter_list.end();
        for (; i != ie; i++) {
            strm << BESIndent::LMarg << (*i).first << endl;
            BESIndent::Indent();
            (*i).second->dump(strm);
            BESIndent::UnIndent();
        }
        BESIndent::UnIndent();
    }
    else {
        strm << BESIndent::LMarg << "registered transmitters: none" << endl;
    }
    BESIndent::UnIndent();
}
 
BESReturnManager *
BESReturnManager::TheManager()
{
    std::call_once(d_euc_init_once, BESReturnManager::initialize_instance);
    return d_instance;
}
 
void BESReturnManager::initialize_instance() {
    d_instance = new BESReturnManager;
#ifdef HAVE_ATEXIT
    atexit(delete_instance);
#endif
}
 
void BESReturnManager::delete_instance() {
    delete d_instance;
    d_instance = 0;
}