write_concern.h

/*    Copyright 2014 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 <bitset>
#include <string>
 
#include "mongo/client/export_macros.h"
#include "mongo/db/jsobj.h"
 
namespace mongo {
 
    class MONGO_CLIENT_API WriteConcern {
    public:
        WriteConcern();
 
        static const char kMajority[];
 
        //
        // Standard write concern levels as defined in the MongoDB manual:
        // http://docs.mongodb.org/manual/core/write-concern/
        //
 
        static const WriteConcern unacknowledged;
 
        static const WriteConcern acknowledged;
 
        static const WriteConcern journaled;
 
        static const WriteConcern replicated;
 
        static const WriteConcern majority;
 
        int32_t nodes() const;
 
        const std::string& mode() const;
 
        bool journal() const;
 
        bool fsync() const;
 
        int32_t timeout() const;
 
        WriteConcern& nodes(int w);
 
        WriteConcern& mode(const StringData& w);
 
        WriteConcern& journal(bool j);
 
        WriteConcern& fsync(bool fsync);
 
        WriteConcern& timeout(int timeout);
 
        bool requiresConfirmation() const;
 
        bool hasMode() const;
 
        BSONObj obj() const;
 
    private:
        // Enabled option book keeping
        static const size_t kNumOptions = 5;
        enum Options { kW, kWStr, kJ, kFsync, kTimeout };
        std::bitset<kNumOptions> _enabled;
 
        // Actual option values
        int32_t _w;
        std::string _w_str;
        bool _j;
        bool _fsync;
        int32_t _timeout;
    };
 
} // namespace mongo