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// cloner.h - copy a database (export/import basically)
/**
* Copyright (C) 2011 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/client/dbclientinterface.h"
#include "mongo/db/client.h"
#include "mongo/db/jsobj.h"
namespace mongo {
struct CloneOptions;
class DBClientBase;
class DBClientCursor;
class Query;
class OperationContext;
class Cloner: boost::noncopyable {
public:
Cloner();
/**
* slaveOk - if true it is ok if the source of the data is !ismaster.
* useReplAuth - use the credentials we normally use as a replication slave for the cloning
* snapshot - use $snapshot mode for copying collections. note this should not be used
* when it isn't required, as it will be slower. for example,
* repairDatabase need not use it.
*/
void setConnection( DBClientBase *c ) { _conn.reset( c ); }
/** copy the entire database */
bool go(OperationContext* txn,
Client::Context& ctx,
const std::string& masterHost,
const CloneOptions& opts,
std::set<std::string>* clonedColls,
std::string& errmsg, int *errCode = 0);
bool copyCollection(OperationContext* txn,
const std::string& ns,
const BSONObj& query,
std::string& errmsg,
bool mayYield,
bool mayBeInterrupted,
bool copyIndexes = true,
bool logForRepl = true );
/**
* validate the cloner query was successful
* @param cur Cursor the query was executed on
* @param errCode out Error code encountered during the query
* @param errmsg out Error message encountered during the query
*/
static bool validateQueryResults(const std::auto_ptr<DBClientCursor>& cur, int32_t* errCode,
std::string& errmsg);
/**
* @param errmsg out - Error message (if encountered).
* @param errCode out - If provided, this will be set on error to the server's error code.
* Currently this will only be set if there is an error in the initial
* system.namespaces query.
*/
static bool cloneFrom(OperationContext* txn,
Client::Context& context,
const std::string& masterHost,
const CloneOptions& options,
std::string& errmsg,
int* errCode = 0,
std::set<std::string>* clonedCollections = 0);
/**
* Copy a collection (and indexes) from a remote host
*/
static bool copyCollectionFromRemote(OperationContext* txn,
const std::string& host, const std::string& ns, std::string& errmsg);
private:
void copy(OperationContext* txn,
Client::Context& ctx,
const char *from_ns,
const char *to_ns,
bool isindex,
bool logForRepl,
bool masterSameProcess,
bool slaveOk,
bool mayYield,
bool mayBeInterrupted,
Query q);
struct Fun;
std::auto_ptr<DBClientBase> _conn;
};
struct CloneOptions {
CloneOptions() {
logForRepl = true;
slaveOk = false;
useReplAuth = false;
snapshot = true;
mayYield = true;
mayBeInterrupted = false;
syncData = true;
syncIndexes = true;
}
std::string fromDB;
std::set<std::string> collsToIgnore;
bool logForRepl;
bool slaveOk;
bool useReplAuth;
bool snapshot;
bool mayYield;
bool mayBeInterrupted;
bool syncData;
bool syncIndexes;
};
} // namespace mongo
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