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/**
* Copyright (C) 2017 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kReplicationRollback
#include "mongo/platform/basic.h"
#include "mongo/db/repl/rollback_fix_up_info_descriptions.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/db/jsobj.h"
namespace mongo {
namespace repl {
namespace {
/**
* Appends single document op type to builder as string element under the field name "op".
*/
void appendOpTypeToBuilder(RollbackFixUpInfo::SingleDocumentOpType opType,
BSONObjBuilder* builder) {
auto fieldName = "operationType"_sd;
switch (opType) {
case RollbackFixUpInfo::SingleDocumentOpType::kDelete:
builder->append(fieldName, "delete");
break;
case RollbackFixUpInfo::SingleDocumentOpType::kInsert:
builder->append(fieldName, "insert");
break;
case RollbackFixUpInfo::SingleDocumentOpType::kUpdate:
builder->append(fieldName, "update");
break;
}
}
/**
* Returns string representation of RollbackFixUpInfo::IndexOpType.
*/
std::string toString(RollbackFixUpInfo::IndexOpType opType) {
switch (opType) {
case RollbackFixUpInfo::IndexOpType::kCreate:
return "create";
case RollbackFixUpInfo::IndexOpType::kDrop:
return "drop";
case RollbackFixUpInfo::IndexOpType::kUpdateTTL:
return "updateTTL";
}
MONGO_UNREACHABLE;
}
/**
* Appends index op type to builder as string element under the field name "op".
*/
void appendOpTypeToBuilder(RollbackFixUpInfo::IndexOpType opType, BSONObjBuilder* builder) {
builder->append("operationType", toString(opType));
}
} // namespace
RollbackFixUpInfo::SingleDocumentOperationDescription::SingleDocumentOperationDescription(
const UUID& collectionUuid,
const BSONElement& docId,
RollbackFixUpInfo::SingleDocumentOpType opType,
const std::string& dbName)
: _collectionUuid(collectionUuid),
_wrappedDocId(docId.wrap("documentId")),
_opType(opType),
_dbName(dbName) {}
BSONObj RollbackFixUpInfo::SingleDocumentOperationDescription::toBSON() const {
// For non-insert operations, we will use the collection UUID and document id to query the sync
// source (using the source collection's default collation) for the most recent copy of the
// deleted/updated document. This is necessary to complete the rollback for a deleted/updated
// document.
// Insert operations are rolled back by deleting the the document from the local collection.
BSONObjBuilder bob;
{
BSONObjBuilder idBob(bob.subobjStart("_id"));
_collectionUuid.appendToBuilder(&idBob, "collectionUuid");
idBob.append(_wrappedDocId.firstElement());
}
// This matches the "op" field in the oplog entry.
appendOpTypeToBuilder(_opType, &bob);
// The database name is used in the find command request when fetching the document from the
// sync source.
bob.append("db", _dbName);
// This will be replaced by the most recent copy of the affected document from the sync
// source. If the document is not found on the sync source, this will remain null.
bob.appendNull("documentToRestore");
return bob.obj();
}
RollbackFixUpInfo::CollectionUuidDescription::CollectionUuidDescription(const UUID& collectionUuid,
const NamespaceString& nss)
: _collectionUuid(collectionUuid), _nss(nss) {}
BSONObj RollbackFixUpInfo::CollectionUuidDescription::toBSON() const {
BSONObjBuilder bob;
_collectionUuid.appendToBuilder(&bob, "_id");
bob.append("ns", _nss.ns());
return bob.obj();
}
RollbackFixUpInfo::CollectionOptionsDescription::CollectionOptionsDescription(
const UUID& collectionUuid, const BSONObj& optionsObj)
: _collectionUuid(collectionUuid), _optionsObj(optionsObj) {}
BSONObj RollbackFixUpInfo::CollectionOptionsDescription::toBSON() const {
BSONObjBuilder bob;
_collectionUuid.appendToBuilder(&bob, "_id");
bob.append("options", _optionsObj);
return bob.obj();
}
RollbackFixUpInfo::IndexDescription::IndexDescription(const UUID& collectionUuid,
const std::string& indexName,
RollbackFixUpInfo::IndexOpType opType,
const BSONObj& infoObj)
: _collectionUuid(collectionUuid), _indexName(indexName), _opType(opType), _infoObj(infoObj) {
invariant(RollbackFixUpInfo::IndexOpType::kUpdateTTL != _opType);
}
RollbackFixUpInfo::IndexDescription::IndexDescription(const UUID& collectionUuid,
const std::string& indexName,
Seconds expireAfterSeconds)
: _collectionUuid(collectionUuid),
_indexName(indexName),
_opType(RollbackFixUpInfo::IndexOpType::kUpdateTTL),
_expireAfterSeconds(expireAfterSeconds) {
BSONObjBuilder bob;
bob.append("expireAfterSeconds", durationCount<Seconds>(*_expireAfterSeconds));
_infoObj = bob.obj();
}
RollbackFixUpInfo::IndexOpType RollbackFixUpInfo::IndexDescription::getOpType() const {
return _opType;
}
std::string RollbackFixUpInfo::IndexDescription::getOpTypeAsString() const {
return toString(_opType);
}
boost::optional<Seconds> RollbackFixUpInfo::IndexDescription::getExpireAfterSeconds() const {
return _expireAfterSeconds;
}
// static
StatusWith<RollbackFixUpInfo::IndexOpType> RollbackFixUpInfo::IndexDescription::parseOpType(
const BSONObj& doc) {
std::string opTypeStr;
auto status = bsonExtractStringField(doc, "operationType"_sd, &opTypeStr);
if (!status.isOK()) {
return status;
}
if ("create" == opTypeStr) {
return RollbackFixUpInfo::IndexOpType::kCreate;
} else if ("drop" == opTypeStr) {
return RollbackFixUpInfo::IndexOpType::kDrop;
} else if ("updateTTL" == opTypeStr) {
return RollbackFixUpInfo::IndexOpType::kUpdateTTL;
}
return Status(ErrorCodes::FailedToParse,
str::stream() << "Unrecognized RollbackFixUpInfo::IndexOpType: " << opTypeStr);
}
BSONObj RollbackFixUpInfo::IndexDescription::toBSON() const {
BSONObjBuilder bob;
bob.append("_id", makeIdKey());
appendOpTypeToBuilder(_opType, &bob);
bob.append("infoObj", _infoObj);
return bob.obj();
}
BSONObj RollbackFixUpInfo::IndexDescription::makeIdKey() const {
BSONObjBuilder idBob;
_collectionUuid.appendToBuilder(&idBob, "collectionUuid");
idBob.append("indexName", _indexName);
return idBob.obj();
}
} // namespace repl
std::ostream& operator<<(std::ostream& os, const repl::RollbackFixUpInfo::IndexOpType& opType) {
return os << repl::toString(opType);
}
} // namespace mongo
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