durop.h

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// @file durop.h class DurOp and descendants

#pragma once

#include "dur_journalformat.h"
#include "../util/bufreader.h"
#include "../util/paths.h"

namespace mongo {

    class AlignedBuilder;

    namespace dur {

        const unsigned Alignment = 8192;

        class DurOp { /* copyable */
        public:
            // @param opcode a sentinel value near max unsigned which uniquely identifies the operation.
            // @see dur::JEntry
            DurOp(unsigned opcode) : _opcode(opcode) { }

            virtual ~DurOp() { }

            void serialize(AlignedBuilder& ab);

            static shared_ptr<DurOp> read(unsigned opcode, BufReader& br);

            virtual void replay() = 0;

            virtual string toString() = 0;

            virtual bool needFilesClosed() { return false; }

        protected:
            virtual void _serialize(AlignedBuilder& ab) = 0;

        private:
            const unsigned _opcode;
        };

        class FileCreatedOp : public DurOp {
        public:
            FileCreatedOp(BufReader& log);
            FileCreatedOp(string f, unsigned long long l);
            virtual void replay();
            virtual string toString();
            virtual bool needFilesClosed();
        protected:
            virtual void _serialize(AlignedBuilder& ab);
        private:
            RelativePath _p;
            unsigned long long _len; // size of file, not length of name
        };

        class DropDbOp : public DurOp {
        public:
            DropDbOp(BufReader& log);
            DropDbOp(string db) :
                DurOp(JEntry::OpCode_DropDb), _db(db) { }
            virtual void replay();
            virtual string toString() { return string("DropDbOp ") + _db; }
            virtual bool needFilesClosed() { return true; }
        protected:
            virtual void _serialize(AlignedBuilder& ab);
        private:
            string _db;
        };

    }

}

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mongodb
Author(s): Nate Koenig
autogenerated on Fri Jan 11 12:15:18 2013