HiredisMultiAdapter.hpp

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#pragma once
 
#include <memory>
#include <vector>
 
#include "HiredisAdapter.hpp"
 
#ifdef WITH_GTEST_FRIEND_TEST
#include <gtest/gtest.h>
#endif
 
class HiredisMultiAdapter : public HiredisAdapter
{
public:
    using adapter_ptr_t = HiredisAdapter*;
    using adapter_refw_t = std::reference_wrapper<HiredisAdapter>;
 
    HiredisMultiAdapter() = default;
    template <typename... U>
    HiredisMultiAdapter(HiredisAdapter& a, U&... others) : HiredisMultiAdapter(others...)
    {
        adapters.push_back(static_cast<adapter_ptr_t>(&a));
    }
    HiredisMultiAdapter(const std::vector<adapter_refw_t>& given_adapters)
    {
        for (auto& a : given_adapters) {
            adapters.push_back(&a.get());
        }
    }
    HiredisMultiAdapter(std::vector<HiredisAdapter>& given_adapters)
    {
        for (HiredisAdapter& a : given_adapters) {
            adapters.push_back(&a);
        }
    }
 
    HiredisMultiAdapter(const HiredisMultiAdapter&) = delete;
    ~HiredisMultiAdapter() = default;
 
    void connect() override;
    void disconnect() override;
 
    bool is_connected() const noexcept override;
 
    set_reply_t set(const std::string& key, const std::string& value,
                    const timeout_t expire = 0) override;
    sadd_reply_t sadd(const std::string& key, const std::string& value,
                      const timeout_t expire = 0) override;
 
    void expire(const std::string& key, timeout_t expire) override;
 
    get_reply_t get(const std::string& key) override;
    smembers_reply_t smembers(const std::string& key) override;
 
    bool last_expire_has_failed() const noexcept override;
 
    inline size_t adapter_amount() const noexcept
    {
        return adapters.size();
    }
 
private:
    std::vector<adapter_ptr_t> adapters;
 
#ifdef WITH_GTEST_FRIEND_TEST
    FRIEND_TEST(HiredisMultiAdapter, inserts_all_given_adapters_on_template_constructor);
    FRIEND_TEST(HiredisMultiAdapter, inserts_all_given_adapters_on_vector_constructor);
#endif
};