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/document/value.hpp>
#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;
 
    bsoncxx::document::value to_document() 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>