Method get

imperative/src/impl/persistent_cache.cpp:60–80

    void flush() override {}

    mgb::Maybe<Blob> get(const std::string& category, const Blob& key) override {
        MGB_LOCK_GUARD(m_mtx);
        auto mem_result = m_local->get(category, key);
        if (mem_result.valid()) {
            return mem_result;
        }
        std::string key_str(static_cast<const char*>(key.ptr), key.size);
        std::string redis_key_str;
        encode(category + '@' + key_str, redis_key_str, 24);
        auto result = m_client.get(m_prefix + redis_key_str);
        sync();
        auto content = result.get();
        if (content.is_null()) {
            return None;
        }
        std::string decode_content;
        mgb_assert(content.is_string());
        decode(content.as_string(), decode_content);
        m_local->put(category, key, {decode_content.data(), decode_content.length()});
        return m_local->get(category, key);
    }

    void put(const std::string& category, const Blob& key, const Blob& value) override {
        MGB_LOCK_GUARD(m_mtx);