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// record_store_v1_base.h
/**
* Copyright (C) 2013 10gen 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.
*/
#pragma once
#include "mongo/db/diskloc.h"
#include "mongo/db/structure/record_store.h"
namespace mongo {
class DocWriter;
class ExtentManager;
class Record;
class RecordStoreV1MetaData {
public:
virtual ~RecordStoreV1MetaData(){}
virtual int bucket(int size) const = 0;
virtual const DiskLoc& capExtent() const = 0;
virtual void setCapExtent( const DiskLoc& loc ) = 0;
virtual const DiskLoc& capFirstNewRecord() const = 0;
virtual void setCapFirstNewRecord( const DiskLoc& loc ) = 0;
virtual bool capLooped() const = 0;
virtual void clearSystemFlags() = 0;
virtual long long dataSize() const = 0;
virtual long long numRecords() const = 0;
virtual void incrementStats( long long dataSizeIncrement,
long long numRecordsIncrement ) = 0;
virtual void setStats( long long dataSizeIncrement,
long long numRecordsIncrement ) = 0;
virtual const DiskLoc& deletedListEntry( int bucket ) const = 0;
virtual void setDeletedListEntry( int bucket, const DiskLoc& loc ) = 0;
virtual void orphanDeletedList() = 0;
virtual const DiskLoc& firstExtent() const = 0;
virtual void setFirstExtent( const DiskLoc& loc ) = 0;
virtual const DiskLoc& lastExtent() const = 0;
virtual void setLastExtent( const DiskLoc& loc ) = 0;
virtual bool isCapped() const = 0;
virtual bool isUserFlagSet( int flag ) const = 0;
virtual int lastExtentSize() const = 0;
virtual void setLastExtentSize( int newMax ) = 0;
virtual long long maxCappedDocs() const = 0;
virtual double paddingFactor() const = 0;
virtual void setPaddingFactor( double paddingFactor ) = 0;
virtual int quantizePowerOf2AllocationSpace(int allocSize) const = 0;
};
class RecordStoreV1Base : public RecordStore {
public:
class IntraExtentIterator;
RecordStoreV1Base( const StringData& ns,
RecordStoreV1MetaData* details,
ExtentManager* em,
bool isSystemIndexes );
virtual ~RecordStoreV1Base();
Record* recordFor( const DiskLoc& loc ) const;
void deleteRecord( const DiskLoc& dl );
StatusWith<DiskLoc> insertRecord( const char* data, int len, int quotaMax );
StatusWith<DiskLoc> insertRecord( const DocWriter* doc, int quotaMax );
virtual RecordIterator* getIteratorForRepair() const;
void increaseStorageSize( int size, int quotaMax );
virtual Status validate( bool full, bool scanData,
ValidateAdaptor* adaptor,
ValidateResults* results, BSONObjBuilder* output ) const;
// TODO: another sad one
virtual const DeletedRecord* deletedRecordFor( const DiskLoc& loc ) const;
const RecordStoreV1MetaData* details() const { return _details.get(); }
/**
* @return the actual size to create
* will be >= oldRecordSize
* based on padding and any other flags
*/
int getRecordAllocationSize( int minRecordSize ) const;
DiskLoc getExtentLocForRecord( const DiskLoc& loc ) const;
DiskLoc getNextRecord( const DiskLoc& loc ) const;
DiskLoc getPrevRecord( const DiskLoc& loc ) const;
DiskLoc getNextRecordInExtent( const DiskLoc& loc ) const;
DiskLoc getPrevRecordInExtent( const DiskLoc& loc ) const;
protected:
virtual bool isCapped() const = 0;
virtual StatusWith<DiskLoc> allocRecord( int lengthWithHeaders, int quotaMax ) = 0;
// TODO: document, remove, what have you
virtual void addDeletedRec( const DiskLoc& dloc) = 0;
// TODO: another sad one
virtual DeletedRecord* drec( const DiskLoc& loc ) const;
// just a wrapper for _extentManager->getExtent( loc );
Extent* _getExtent( const DiskLoc& loc ) const;
DiskLoc _getExtentLocForRecord( const DiskLoc& loc ) const;
DiskLoc _getNextRecord( const DiskLoc& loc ) const;
DiskLoc _getPrevRecord( const DiskLoc& loc ) const;
DiskLoc _getNextRecordInExtent( const DiskLoc& loc ) const;
DiskLoc _getPrevRecordInExtent( const DiskLoc& loc ) const;
/** add a record to the end of the linked list chain within this extent.
require: you must have already declared write intent for the record header.
*/
void _addRecordToRecListInExtent(Record* r, DiskLoc loc);
scoped_ptr<RecordStoreV1MetaData> _details;
ExtentManager* _extentManager;
bool _isSystemIndexes;
friend class RecordStoreV1RepairIterator;
};
/**
* Iterates over all records within a single extent.
*
* EOF at end of extent, even if there are more extents.
*/
class RecordStoreV1Base::IntraExtentIterator : public RecordIterator {
public:
IntraExtentIterator(DiskLoc start, const RecordStore* rs, bool forward = true)
: _curr(start), _rs(rs), _forward(forward) {}
virtual bool isEOF() { return _curr.isNull(); }
virtual DiskLoc curr() { return _curr; }
virtual DiskLoc getNext();
virtual void invalidate(const DiskLoc& dl);
virtual void prepareToYield() {}
virtual bool recoverFromYield() { return true; }
virtual const Record* recordFor( const DiskLoc& loc ) const { return _rs->recordFor(loc); }
private:
DiskLoc _curr;
const RecordStore* _rs;
bool _forward;
};
}
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