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// database.h
/**
* Copyright (C) 2008 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/string_data.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/db/catalog/collection_options.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/storage_options.h"
#include "mongo/util/mongoutils/str.h"
#include "mongo/util/string_map.h"
namespace mongo {
class Collection;
class DataFile;
class DatabaseCatalogEntry;
class ExtentManager;
class IndexCatalog;
class NamespaceDetails;
class OperationContext;
/**
* Database represents a database database
* Each database database has its own set of files -- dbname.ns, dbname.0, dbname.1, ...
* NOT memory mapped
*/
class Database {
public:
Database(OperationContext* txn, const StringData& name, DatabaseCatalogEntry* dbEntry);
// must call close first
~Database();
// closes files and other cleanup see below.
void close( OperationContext* txn );
const std::string& name() const { return _name; }
void clearTmpCollections(OperationContext* txn);
/**
* @return true if success. false if bad level or error creating profile ns
*/
bool setProfilingLevel( OperationContext* txn, int newLevel , std::string& errmsg );
int getProfilingLevel() const { return _profile; }
const char* getProfilingNS() const { return _profileName.c_str(); }
void getStats( OperationContext* opCtx, BSONObjBuilder* output, double scale = 1 );
const DatabaseCatalogEntry* getDatabaseCatalogEntry() const;
Status dropCollection( OperationContext* txn, const StringData& fullns );
Collection* createCollection( OperationContext* txn,
const StringData& ns,
const CollectionOptions& options = CollectionOptions(),
bool allocateSpace = true,
bool createDefaultIndexes = true );
/**
* @param ns - this is fully qualified, which is maybe not ideal ???
*/
Collection* getCollection( const StringData& ns ) const ;
Collection* getCollection( const NamespaceString& ns ) const {
return getCollection( ns.ns() );
}
Collection* getOrCreateCollection( OperationContext* txn, const StringData& ns );
Status renameCollection( OperationContext* txn,
const StringData& fromNS,
const StringData& toNS,
bool stayTemp );
/**
* @return name of an existing database with same text name but different
* casing, if one exists. Otherwise the empty std::string is returned. If
* 'duplicates' is specified, it is filled with all duplicate names.
// TODO move???
*/
static std::string duplicateUncasedName( const std::string &name,
std::set< std::string > *duplicates = 0 );
static Status validateDBName( const StringData& dbname );
const std::string& getSystemIndexesName() const { return _indexesName; }
private:
/**
* Gets or creates collection instance from existing metadata,
* Returns NULL if invalid
*
* Note: This does not add the collection to _collections map, that must be done
* by the caller, who takes onership of the Collection*
*/
Collection* _getOrCreateCollectionInstance(OperationContext* txn, const StringData& fullns);
void _clearCollectionCache(OperationContext* txn, const StringData& fullns );
class AddCollectionChange;
class RemoveCollectionChange;
const std::string _name; // "alleyinsider"
DatabaseCatalogEntry* _dbEntry; // not owned here
const std::string _profileName; // "alleyinsider.system.profile"
const std::string _indexesName; // "alleyinsider.system.indexes"
int _profile; // 0=off.
// TODO: make sure deletes go through
// this in some ways is a dupe of _namespaceIndex
// but it points to a much more useful data structure
typedef StringMap< Collection* > CollectionMap;
CollectionMap _collections;
friend class Collection;
friend class NamespaceDetails;
friend class IndexCatalog;
};
void dropDatabase(OperationContext* txn, Database* db );
void dropAllDatabasesExceptLocal(OperationContext* txn);
Status userCreateNS( OperationContext* txn,
Database* db,
const StringData& ns,
BSONObj options,
bool logForReplication,
bool createDefaultIndexes = true );
} // namespace mongo
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