eventBus.hpp

/*
  ANCH Framework: ANother C++ Hack is a C++ framework based on C++11 standard
  Copyright (C) 2012 Vincent Lachenal
 
  This file is part of ANCH Framework.
 
  ANCH Framework 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.
 
  ANCH Framework 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 ANCH Framework.  If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
 
#include <thread>
#include <mutex>
#include <queue>
#include <set>
 
#include "events/observer.hpp"
#include "events/event.hpp"
#include "lessPtrCompare.hpp"
#include "singleton.hpp"
 
 
namespace anch::events {

  template<typename T>
  class EventBus: public anch::Singleton<EventBus<T>> {
    friend class anch::Singleton<EventBus<T>>;
 
    // Attributes +
  private:
    std::mutex _eventMutex;

    std::mutex _queueMutex;

    std::thread* _thread;

    std::queue<anch::events::Event<T>> _events;

    std::set<anch::events::Observer<T>*, anch::LessPtrCompare<anch::events::Observer<T>>> _observers;
    // Attributes -
 
 
    // Constructors +
  public:
    EventBus();
    // Constructors -
 
  private:
    // Destructor +
    virtual ~EventBus();
    // Destructor -
 
 
    // Methods +
  public:
    bool addObserver(anch::events::Observer<T>& observer) noexcept;

    static bool AddObserver(anch::events::Observer<T>& observer) noexcept;

    void removeObserver(anch::events::Observer<T>& observer) noexcept;

    static void RemoveObserver(anch::events::Observer<T>& observer) noexcept;

    void fireEvent(const T& event, const std::map<std::string,std::string>& headers = {}) noexcept;

    void fireEvent(const anch::events::Event<T>& event) noexcept;

    static void FireEvent(const T& event, const std::map<std::string,std::string>& headers = {}) noexcept;

    static void FireEvent(const anch::events::Event<T>& event) noexcept;

    void release();
 
  private:
    void processEvents() noexcept;
    // Methods -
 
  };
 
}
 
#include "events/impl/eventBus.hpp"