event_registration.h

#pragma once

#include <stdint.h>
#include <stdexcept>

#include "soss_client/typed_named_cache.h"
#include "boost/function.hpp"

namespace sosscli {

typedef boost::function<int (const SossKey &key, uint32_t code)> ExpirationCallback;

class EventRegistration
{
public:

    /* Constructors */

    virtual ~EventRegistration() {};

    /* Public methods */

    static void register_expiration_handler(const NamedCache &nc, ExpirationCallback callback);
    static void deregister_expiration_handler(const NamedCache &nc);

protected:

private:
    EventRegistration() {}
    static void init_once();

    static int expiration_callback_handler(SOSS_OBJKEY key, unsigned int code);

    static boost::unordered_map<uint32_t, ExpirationCallback> expiration_callbacks_;

    static boost::once_flag             run_once_;
    static bool                         is_init_;
};




} // namespace