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// mmap_v1_engine.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.
*/
#pragma once
#include <map>
#include <boost/thread/mutex.hpp>
#include "mongo/db/storage/storage_engine.h"
namespace mongo {
class MMAPV1DatabaseCatalogEntry;
class MMAPV1Engine : public StorageEngine {
public:
MMAPV1Engine();
virtual ~MMAPV1Engine();
void finishInit();
RecoveryUnit* newRecoveryUnit( OperationContext* opCtx );
void listDatabases( std::vector<std::string>* out ) const;
int flushAllFiles( bool sync );
Status repairDatabase( OperationContext* tnx,
const std::string& dbName,
bool preserveClonedFilesOnFailure,
bool backupOriginalFiles );
DatabaseCatalogEntry* getDatabaseCatalogEntry( OperationContext* opCtx,
const StringData& db );
virtual bool supportsDocLocking() const { return false; }
virtual bool isMmapV1() const { return true; }
virtual bool isDurable() const;
virtual Status closeDatabase(OperationContext* txn, const StringData& db);
virtual Status dropDatabase(OperationContext* txn, const StringData& db);
virtual void cleanShutdown();
private:
static void _listDatabases( const std::string& directory,
std::vector<std::string>* out );
boost::mutex _entryMapMutex;
typedef std::map<std::string,MMAPV1DatabaseCatalogEntry*> EntryMap;
EntryMap _entryMap;
};
void _deleteDataFiles(const std::string& database);
}
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