request_data_base.hpp

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#pragma once
 
/// @file userver/storages/redis/request_data_base.hpp
/// @brief Abstract bases for Redis request/scan pending results
 
#include <string>
 
#include <userver/compiler/impl/lifetime.hpp>
#include <userver/engine/awaitable.hpp>
#include <userver/storages/redis/reply_fwd.hpp>
#include <userver/storages/redis/reply_types.hpp>
#include <userver/storages/redis/scan_tag.hpp>
 
USERVER_NAMESPACE_BEGIN
 
namespace storages::redis {
 
// Mock note:
// Request->
//   RequestDataBase
//
// RequestDataBase <- RequestDataImpl
// RequestDataBase <- MockRequestDataBase <- UserMockRequestData
 
template <typename ReplyType>
class RequestDataBase {
public:
    virtual ~RequestDataBase() = default;
 
    virtual void Wait() = 0;
 
    virtual ReplyType Get(const std::string& request_description) = 0;
 
    virtual ReplyPtr GetRaw() = 0;
 
    /// Satisfies @ref engine::Awaitable, for use with @ref engine::WaitAnyContext and friends.
    virtual engine::AwaitableToken GetAwaitableToken() noexcept USERVER_IMPL_LIFETIME_BOUND = 0;
};
 
template <ScanTag TScanTag>
class RequestScanDataBase {
public:
    using ReplyElem = typename ScanReplyElem<TScanTag>::type;
 
    virtual ~RequestScanDataBase() = default;
 
    void SetRequestDescription(std::string request_description) {
        request_description_ = std::move(request_description);
    }
 
    virtual ReplyElem Get() = 0;
 
    virtual ReplyElem& Current() = 0;
 
    virtual bool Eof() = 0;
 
protected:
    // NOLINTNEXTLINE(misc-non-private-member-variables-in-classes)
    std::string request_description_;
};
 
}  // namespace storages::redis
 
USERVER_NAMESPACE_END