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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "map_listener.h"
#include <memory>
namespace slobrok {
struct MapSource;
class MapSubscription {
private:
MapSource &_source;
MapListener &_listener;
struct Tag {};
public:
MapSubscription(MapSource &source, MapListener &listener, Tag);
MapSubscription(const MapSubscription &) = delete;
MapSubscription(MapSubscription &&) = delete;
MapSubscription& operator=(const MapSubscription &) = delete;
MapSubscription& operator=(MapSubscription &&) = delete;
~MapSubscription();
static std::unique_ptr<MapSubscription> subscribe(MapSource &source, MapListener &listener);
};
/**
* Interface for sources of incremental map updates.
**/
struct MapSource {
virtual ~MapSource();
private:
friend class MapSubscription;
virtual void registerListener(MapListener &listener) = 0;
virtual void unregisterListener(MapListener &listener) = 0;
};
} // namespace slobrok
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