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// rename_collection.cpp
/**
* Copyright (C) 2013-2014 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.
*/
#include "mongo/client/dbclientcursor.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/collection_catalog_entry.h"
#include "mongo/db/catalog/rename_collection.h"
#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/catalog/index_create.h"
#include "mongo/db/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/rename_collection.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/dbhelpers.h"
#include "mongo/db/service_context.h"
#include "mongo/db/index/index_descriptor.h"
#include "mongo/db/index_builder.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/op_observer.h"
#include "mongo/db/operation_context_impl.h"
#include "mongo/db/ops/insert.h"
#include "mongo/db/repl/replication_coordinator_global.h"
#include "mongo/util/scopeguard.h"
namespace mongo {
using std::min;
using std::string;
using std::stringstream;
class CmdRenameCollection : public Command {
public:
CmdRenameCollection() : Command("renameCollection") {}
virtual bool adminOnly() const {
return true;
}
virtual bool slaveOk() const {
return false;
}
virtual bool isWriteCommandForConfigServer() const {
return true;
}
virtual Status checkAuthForCommand(ClientBasic* client,
const std::string& dbname,
const BSONObj& cmdObj) {
return rename_collection::checkAuthForRenameCollectionCommand(client, dbname, cmdObj);
}
virtual void help(stringstream& help) const {
help << " example: { renameCollection: foo.a, to: bar.b }";
}
static void dropCollection(OperationContext* txn, Database* db, StringData collName) {
WriteUnitOfWork wunit(txn);
if (db->dropCollection(txn, collName).isOK()) {
// ignoring failure case
wunit.commit();
}
}
virtual bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
string source = cmdObj.getStringField(name.c_str());
string target = cmdObj.getStringField("to");
if (!NamespaceString::validCollectionComponent(target.c_str())) {
errmsg = "invalid collection name: " + target;
return false;
}
if (source.empty() || target.empty()) {
errmsg = "invalid command syntax";
return false;
}
if ((repl::getGlobalReplicationCoordinator()->getReplicationMode() !=
repl::ReplicationCoordinator::modeNone)) {
if (NamespaceString(source).isOplog()) {
errmsg = "can't rename live oplog while replicating";
return false;
}
if (NamespaceString(target).isOplog()) {
errmsg = "can't rename to live oplog while replicating";
return false;
}
}
if (NamespaceString::oplog(source) != NamespaceString::oplog(target)) {
errmsg = "If either the source or target of a rename is an oplog name, both must be";
return false;
}
Status sourceStatus = userAllowedWriteNS(source);
if (!sourceStatus.isOK()) {
errmsg = "error with source namespace: " + sourceStatus.reason();
return false;
}
Status targetStatus = userAllowedWriteNS(target);
if (!targetStatus.isOK()) {
errmsg = "error with target namespace: " + targetStatus.reason();
return false;
}
if (NamespaceString(source).coll() == "system.indexes" ||
NamespaceString(target).coll() == "system.indexes") {
errmsg = "renaming system.indexes is not allowed";
return false;
}
return appendCommandStatus(result,
renameCollection(txn,
NamespaceString(source),
NamespaceString(target),
cmdObj["dropTarget"].trueValue(),
cmdObj["stayTemp"].trueValue()));
}
} cmdrenamecollection;
} // namespace mongo
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