mytheventhandler.h

/*
 *      Copyright (C) 2014 Jean-Luc Barriere
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This Program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
 *  MA 02110-1301 USA
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */
 
#ifndef MYTHEVENTHANDLER_H
#define MYTHEVENTHANDLER_H
 
#include "mythtypes.h"
 
#include <string>
 
#define EVENTHANDLER_CONNECTED      "CONNECTED"
#define EVENTHANDLER_DISCONNECTED   "DISCONNECTED"
#define EVENTHANDLER_STOPPED        "STOPPED"
#define EVENTHANDLER_NOTCONNECTED   "NOTCONNECTED"
#define EVENTHANDLER_TIMEOUT        1 // 1 sec
 
namespace Myth
{
 
  class EventSubscriber
  {
  public:
    virtual ~EventSubscriber() {};
    virtual void HandleBackendMessage(EventMessagePtr msg) = 0;
  };
 
  class EventHandler
  {
  public:
    EventHandler(const std::string& server, unsigned port);
 
    bool Start() { return m_imp->Start(); }
    void Stop() { m_imp->Stop(); }
    void Reset() { m_imp->Reset(); }
    std::string GetServer() const { return m_imp->GetServer(); }
    unsigned GetPort() const { return m_imp->GetPort(); }
    bool IsRunning() { return m_imp->HasStarted(); }
    bool IsConnected() { return m_imp->IsConnected(); }
 
    unsigned CreateSubscription(EventSubscriber *sub) { return m_imp->CreateSubscription(sub); }
    bool SubscribeForEvent(unsigned subid, EVENT_t event) { return m_imp->SubscribeForEvent(subid, event);}
    void RevokeSubscription(unsigned subid) { m_imp->RevokeSubscription(subid); }
    void RevokeAllSubscriptions(EventSubscriber *sub) { m_imp->RevokeAllSubscriptions(sub); }
 
    class EventHandlerThread
    {
      friend class EventHandler;
    public:
      EventHandlerThread(const std::string& server, unsigned port);
      virtual ~EventHandlerThread();
      virtual std::string GetServer() const { return m_server; }
      virtual unsigned GetPort() const { return m_port; }
      virtual bool Start() = 0;
      virtual void Stop() = 0;
      virtual void Reset() = 0;
      virtual bool HasStarted() = 0;
      virtual bool IsConnected() = 0;
      virtual unsigned CreateSubscription(EventSubscriber *sub) = 0;
      virtual bool SubscribeForEvent(unsigned subid, EVENT_t event) = 0;
      virtual void RevokeSubscription(unsigned subid) = 0;
      virtual void RevokeAllSubscriptions(EventSubscriber *sub) = 0;
 
    protected:
      std::string m_server;
      unsigned m_port;
    };
 
    typedef MYTH_SHARED_PTR<EventHandlerThread> EventHandlerThreadPtr;
 
  private:
    EventHandlerThreadPtr m_imp;
  };
 
}
 
#endif  /* MYTHEVENTHANDLER_H */