read_concern.hpp

// Copyright 2015 MongoDB Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include <memory>

#include <bsoncxx/stdx/optional.hpp>
#include <bsoncxx/stdx/string_view.hpp>
#include <mongocxx/options/transaction.hpp>
#include <mongocxx/stdx.hpp>

#include <mongocxx/config/prelude.hpp>

namespace mongocxx {
MONGOCXX_INLINE_NAMESPACE_BEGIN

class client;
class collection;
class database;
class uri;

class MONGOCXX_API read_concern {
   public:
    enum class level {
        k_local,
        k_majority,
        k_linearizable,
        k_server_default,
        k_unknown,
        k_available,
        k_snapshot
    };

    read_concern();

    read_concern(const read_concern&);

    read_concern& operator=(const read_concern&);

    read_concern(read_concern&&) noexcept;

    read_concern& operator=(read_concern&&) noexcept;

    ~read_concern();

    void acknowledge_level(level rc_level);

    level acknowledge_level() const;

    void acknowledge_string(stdx::string_view rc_string);

    stdx::string_view acknowledge_string() const;

   private:
    friend client;
    friend collection;
    friend database;
    friend options::transaction;
    friend uri;

    friend MONGOCXX_API bool MONGOCXX_CALL operator==(const read_concern&, const read_concern&);
    friend MONGOCXX_API bool MONGOCXX_CALL operator!=(const read_concern&, const read_concern&);

    class MONGOCXX_PRIVATE impl;

    MONGOCXX_PRIVATE read_concern(std::unique_ptr<impl>&& implementation);

    std::unique_ptr<impl> _impl;
};

MONGOCXX_INLINE_NAMESPACE_END
}  // namespace mongocxx

#include <mongocxx/config/postlude.hpp>