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// rocks_record_store.h
/**
* Copyright (C) 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include <string>
#include "mongo/db/structure/record_store.h"
namespace rocksdb {
class ColumnFamilyHandle;
class DB;
class Iterator;
class Slice;
}
namespace mongo {
class RocksRecoveryUnit;
class RocksRecordStore : public RecordStore {
public:
RocksRecordStore( const StringData& ns,
rocksdb::DB* db,
rocksdb::ColumnFamilyHandle* columnFamily );
virtual ~RocksRecordStore();
// name of the RecordStore implementation
virtual const char* name() const { return "rocks"; }
virtual long long dataSize() const;
virtual long long numRecords() const;
virtual bool isCapped() const;
virtual int64_t storageSize( BSONObjBuilder* extraInfo = NULL, int infoLevel = 0 ) const;
// CRUD related
virtual RecordData dataFor( const DiskLoc& loc) const;
virtual void deleteRecord( OperationContext* txn, const DiskLoc& dl );
virtual StatusWith<DiskLoc> insertRecord( OperationContext* txn,
const char* data,
int len,
bool enforceQuota );
virtual StatusWith<DiskLoc> insertRecord( OperationContext* txn,
const DocWriter* doc,
bool enforceQuota );
virtual StatusWith<DiskLoc> updateRecord( OperationContext* txn,
const DiskLoc& oldLocation,
const char* data,
int len,
bool enforceQuota,
UpdateMoveNotifier* notifier );
virtual Status updateWithDamages( OperationContext* txn,
const DiskLoc& loc,
const char* damangeSource,
const mutablebson::DamageVector& damages );
virtual RecordIterator* getIterator( OperationContext* txn,
const DiskLoc& start = DiskLoc(),
bool tailable = false,
const CollectionScanParams::Direction& dir =
CollectionScanParams::FORWARD
) const;
virtual RecordIterator* getIteratorForRepair( OperationContext* txn ) const;
virtual std::vector<RecordIterator*> getManyIterators( OperationContext* txn ) const;
virtual Status truncate( OperationContext* txn );
virtual bool compactSupported() const { return false; }
virtual Status compact( OperationContext* txn,
RecordStoreCompactAdaptor* adaptor,
const CompactOptions* options,
CompactStats* stats );
virtual Status validate( OperationContext* txn,
bool full, bool scanData,
ValidateAdaptor* adaptor,
ValidateResults* results, BSONObjBuilder* output ) const;
virtual void appendCustomStats( OperationContext* txn,
BSONObjBuilder* result,
double scale ) const;
virtual Status touch( OperationContext* txn, BSONObjBuilder* output ) const;
virtual Status setCustomOption( OperationContext* txn,
const BSONElement& option,
BSONObjBuilder* info = NULL );
virtual void temp_cappedTruncateAfter(OperationContext* txn,
DiskLoc end,
bool inclusive);
private:
class Iterator : public RecordIterator {
public:
Iterator( const RocksRecordStore* rs, const CollectionScanParams::Direction& dir );
virtual bool isEOF();
virtual DiskLoc curr();
virtual DiskLoc getNext();
virtual void invalidate(const DiskLoc& dl);
virtual void saveState();
virtual bool restoreState();
virtual RecordData dataFor( const DiskLoc& loc ) const;
private:
bool _forward() const;
void _checkStatus();
const RocksRecordStore* _rs;
CollectionScanParams::Direction _dir;
boost::scoped_ptr<rocksdb::Iterator> _iterator;
};
RocksRecoveryUnit* _getRecoveryUnit( OperationContext* opCtx ) const;
DiskLoc _nextId();
rocksdb::Slice _makeKey( const DiskLoc& loc ) const;
rocksdb::DB* _db; // not owned
rocksdb::ColumnFamilyHandle* _columnFamily; // not owned
int _tempIncrement;
};
}
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