SubscriberEventChannel.h

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 * Copyright (c) 2008-2010 Michael Schulze <mschulze@ivs.cs.uni-magdeburg.de>
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#ifndef __SubscriberEventChannel_h__
#define __SubscriberEventChannel_h__

#include "debug.h"
#include "mw/api/EventChannel.h"
#include "mw/api/CallBack.h"

namespace famouso {
    namespace mw {
        namespace api {

            template < class ECH >
            class SubscriberEventChannel : public EventChannel<ECH> {

                public:
                    famouso::mw::api::SECCallBack callback;

                public:

                    SubscriberEventChannel(const Subject &s) : EventChannel<ECH>(s) {}

                    ~SubscriberEventChannel() {
                        unsubscribe();
                    }

                    void subscribe() {
                        TRACE_FUNCTION;
                        // initialize a dummy callback if necessary
                        if (!callback)
                            callback.bind<&famouso::mw::api::cb>();

                        EventChannel<ECH>::ech().subscribe(*this);
                    }

                protected:
                    void unsubscribe() {
                        TRACE_FUNCTION;
                        EventChannel<ECH>::ech().unsubscribe(*this);
                    }

            };

        } // namespace api
    } // namespace mw
} // namespace famouso


#endif /* __SubscriberEventChannel_h__ */