command_writer.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 "mongo/client/dbclient_writer.h"

namespace mongo {

    class DBClientBase;

    class CommandWriter : public DBClientWriter {
    public:
        explicit CommandWriter(DBClientBase* client);

        virtual void write(
            const StringData& ns,
            const std::vector<WriteOperation*>& write_operations,
            bool ordered,
            const WriteConcern* writeConcern,
            WriteResult* writeResult
        );

    private:
        void _endCommand(
            BSONArrayBuilder* batch,
            WriteOperation* op, bool ordered,
            BSONObjBuilder* command
        );

        BSONObj _send(
            BSONObjBuilder* command,
            const WriteConcern* writeConcern,
            const StringData& ns
        );

        bool _fits(BSONArrayBuilder* builder, WriteOperation* operation);

        DBClientBase* const _client;
    };

} // namespace mongo