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// record_store_v1_capped.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/base/owned_pointer_vector.h"
#include "mongo/db/diskloc.h"
#include "mongo/db/storage/extent_manager.h"
#include "mongo/db/structure/capped_callback.h"
#include "mongo/db/structure/record_store_v1_base.h"
namespace mongo {
class CappedRecordStoreV1 : public RecordStoreV1Base {
public:
CappedRecordStoreV1( TransactionExperiment* txn,
CappedDocumentDeleteCallback* collection,
const StringData& ns,
RecordStoreV1MetaData* details,
ExtentManager* em,
bool isSystemIndexes );
virtual ~CappedRecordStoreV1();
const char* name() const { return "CappedRecordStoreV1"; }
virtual Status truncate(TransactionExperiment* txn);
/**
* Truncate documents newer than the document at 'end' from the capped
* collection. The collection cannot be completely emptied using this
* function. An assertion will be thrown if that is attempted.
* @param inclusive - Truncate 'end' as well iff true
* XXX: this will go away soon, just needed to move for now
*/
void temp_cappedTruncateAfter( TransactionExperiment* txn, DiskLoc end, bool inclusive );
virtual RecordIterator* getIterator( const DiskLoc& start, bool tailable,
const CollectionScanParams::Direction& dir) const;
virtual std::vector<RecordIterator*> getManyIterators() const;
virtual bool compactSupported() const { return false; }
virtual Status compact( TransactionExperiment* txn,
RecordStoreCompactAdaptor* adaptor,
const CompactOptions* options,
CompactStats* stats );
// Start from firstExtent by default.
DiskLoc firstRecord( const DiskLoc &startExtent = DiskLoc() ) const;
// Start from lastExtent by default.
DiskLoc lastRecord( const DiskLoc &startExtent = DiskLoc() ) const;
protected:
virtual bool isCapped() const { return true; }
virtual StatusWith<DiskLoc> allocRecord( TransactionExperiment* txn,
int lengthWithHeaders,
int quotaMax );
virtual void addDeletedRec(TransactionExperiment* txn, const DiskLoc& dloc);
private:
// -- start copy from cap.cpp --
void compact(TransactionExperiment* txn);
const DiskLoc& cappedFirstDeletedInCurExtent() const;
void setFirstDeletedInCurExtent( TransactionExperiment* txn, const DiskLoc& loc );
void cappedCheckMigrate(TransactionExperiment* txn);
DiskLoc __capAlloc( TransactionExperiment* txn, int len );
bool inCapExtent( const DiskLoc &dl ) const;
const DiskLoc& cappedListOfAllDeletedRecords() const;
const DiskLoc& cappedLastDelRecLastExtent() const;
void setListOfAllDeletedRecords( TransactionExperiment* txn, const DiskLoc& loc );
void setLastDelRecLastExtent( TransactionExperiment* txn, const DiskLoc& loc );
bool capLooped() const;
Extent *theCapExtent() const;
bool nextIsInCapExtent( const DiskLoc &dl ) const;
void advanceCapExtent( TransactionExperiment* txn, const StringData& ns );
void cappedTruncateLastDelUpdate(TransactionExperiment* txn);
/**
* Truncate documents newer than the document at 'end' from the capped
* collection. The collection cannot be completely emptied using this
* function. An assertion will be thrown if that is attempted.
* @param inclusive - Truncate 'end' as well iff true
*/
void cappedTruncateAfter(TransactionExperiment* txn,
const char* ns,
DiskLoc end,
bool inclusive);
void _maybeComplain( int len ) const;
// -- end copy from cap.cpp --
CappedDocumentDeleteCallback* _deleteCallback;
OwnedPointerVector<ExtentManager::CacheHint> _extentAdvice;
friend class CappedRecordStoreV1Iterator;
};
}
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