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// database_catalog_entry.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 <list>
#include <string>
#include "mongo/base/status.h"
#include "mongo/base/string_data.h"
namespace mongo {
class BSONObjBuilder;
class CollectionCatalogEntry;
class IndexAccessMethod;
class IndexCatalogEntry;
class OperationContext;
class RecordStore;
struct CollectionOptions;
class DatabaseCatalogEntry {
public:
DatabaseCatalogEntry(StringData name) : _name(name.toString()) {}
virtual ~DatabaseCatalogEntry() {}
const std::string& name() const {
return _name;
}
virtual bool exists() const = 0;
virtual bool isEmpty() const = 0;
virtual bool hasUserData() const = 0;
virtual int64_t sizeOnDisk(OperationContext* opCtx) const = 0;
virtual void appendExtraStats(OperationContext* opCtx,
BSONObjBuilder* out,
double scale) const = 0;
/**
* Returns whethers the data files are compatible with the current code:
*
* - Status::OK() if the data files are compatible with the current code.
*
* - ErrorCodes::CanRepairToDowngrade if the data files are incompatible with the current
* code, but a --repair would make them compatible. For example, when rebuilding all indexes
* in the data files would resolve the incompatibility.
*
* - ErrorCodes::MustUpgrade if the data files are incompatible with the current code and a
* newer version is required to start up.
*/
virtual Status currentFilesCompatible(OperationContext* opCtx) const = 0;
// ----
virtual void getCollectionNamespaces(std::list<std::string>* out) const = 0;
// The DatabaseCatalogEntry owns this, do not delete
virtual CollectionCatalogEntry* getCollectionCatalogEntry(StringData ns) const = 0;
// The DatabaseCatalogEntry owns this, do not delete
virtual RecordStore* getRecordStore(StringData ns) const = 0;
// Ownership passes to caller
virtual IndexAccessMethod* getIndex(OperationContext* opCtx,
const CollectionCatalogEntry* collection,
IndexCatalogEntry* index) = 0;
virtual Status createCollection(OperationContext* opCtx,
StringData ns,
const CollectionOptions& options,
bool allocateDefaultSpace) = 0;
virtual Status renameCollection(OperationContext* opCtx,
StringData fromNS,
StringData toNS,
bool stayTemp) = 0;
virtual Status dropCollection(OperationContext* opCtx, StringData ns) = 0;
private:
std::string _name;
};
}
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