ExternalCacheStorage.h

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#pragma once
#include "catapult/cache/CacheChanges.h"
#include "catapult/functions.h"
 
namespace catapult { namespace mongo {
 
    class ExternalCacheStorage {
    protected:
        ExternalCacheStorage(const std::string& name, size_t id)
                : m_name(name)
                , m_id(id)
        {}
 
    public:
        virtual ~ExternalCacheStorage() = default;
 
    public:
        const std::string& name() const {
            return m_name;
        }
 
        size_t id() const {
            return m_id;
        }
 
    public:
        virtual void saveDelta(const cache::CacheChanges& changes) = 0;
 
    private:
        std::string m_name;
        size_t m_id;
    };
 
    template<typename TCache>
    class ExternalCacheStorageT : public ExternalCacheStorage {
    public:
        ExternalCacheStorageT() : ExternalCacheStorage(TCache::Name, TCache::Id)
        {}
 
    public:
        void saveDelta(const cache::CacheChanges& changes) final override {
            saveDelta(changes.sub<TCache>());
        }
 
    private:
        using CacheChangesType = cache::SingleCacheChangesT<typename TCache::CacheDeltaType, typename TCache::CacheValueType>;
 
        virtual void saveDelta(const CacheChangesType& changes) = 0;
    };
}}