ZmqLogger.h

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/**
 * @file
 * @brief Header file for ZeroMQ-based Logger class
 * @author Jonathan Thomas <jonathan@openshot.org>
 *
 * @section LICENSE
 *
 * Copyright (c) 2008-2014 OpenShot Studios, LLC
 * <http://www.openshotstudios.com/>. This file is part of
 * OpenShot Library (libopenshot), an open-source project dedicated to
 * delivering high quality video editing and animation solutions to the
 * world. For more information visit <http://www.openshot.org/>.
 *
 * OpenShot Library (libopenshot) 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 3 of the
 * License, or (at your option) any later version.
 *
 * OpenShot Library (libopenshot) 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 OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef OPENSHOT_LOGGER_H
#define OPENSHOT_LOGGER_H


#include "JuceLibraryCode/JuceHeader.h"
#include <iostream>
#include <stdlib.h>
#include <string>
#include <sstream>
#include <zmq.hpp>
#include <unistd.h>


using namespace std;

namespace openshot {

        /**
         * @brief This abstract class is the base class, used by all readers in libopenshot.
         *
         * Readers are types of classes that read video, audio, and image files, and
         * return openshot::Frame objects. The only requirements for a 'reader', are to
         * derive from this base class, implement the GetFrame method, and call the InitFileInfo() method.
         */
        class ZmqLogger {
        private:
                CriticalSection loggerCriticalSection;
                string connection;

                /// ZMQ Context
                zmq::context_t *context;

                /// ZMQ Socket
                zmq::socket_t *publisher;

                /// Default constructor
                ZmqLogger(){};                                           // Don't allow user to create an instance of this singleton

                /// Default copy method
                ZmqLogger(ZmqLogger const&){};             // Don't allow the user to copy this instance

                /// Default assignment operator
                ZmqLogger & operator=(ZmqLogger const&){};  // Don't allow the user to assign this instance

                /// Private variable to keep track of singleton instance
                static ZmqLogger * m_pInstance;

        public:
                /// Create or get an instance of this logger singleton (invoke the class with this method)
                static ZmqLogger * Instance();

                /// Set or change connection info for logger (i.e. tcp://*:5556)
                void Connection(string new_connection);

                /// Log message to all subscribers of this logger (if any)
                void Log(string message);
        };

}

#endif