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/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kReplicationInitialSync
#include "mongo/platform/basic.h"
#include "mongo/base/string_data.h"
#include "mongo/db/commands/list_collections_filter.h"
#include "mongo/db/repl/database_cloner.h"
#include "mongo/db/repl/database_cloner_gen.h"
#include "mongo/logv2/log.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace repl {
DatabaseCloner::DatabaseCloner(const std::string& dbName,
InitialSyncSharedData* sharedData,
const HostAndPort& source,
DBClientConnection* client,
StorageInterface* storageInterface,
ThreadPool* dbPool)
: BaseCloner("DatabaseCloner"_sd, sharedData, source, client, storageInterface, dbPool),
_dbName(dbName),
_listCollectionsStage("listCollections", this, &DatabaseCloner::listCollectionsStage) {
invariant(!dbName.empty());
_stats.dbname = dbName;
}
BaseCloner::ClonerStages DatabaseCloner::getStages() {
return {&_listCollectionsStage};
}
/* static */
CollectionOptions DatabaseCloner::parseCollectionOptions(const BSONObj& obj) {
return uassertStatusOK(CollectionOptions::parse(obj, CollectionOptions::parseForStorage));
}
void DatabaseCloner::preStage() {
stdx::lock_guard<Latch> lk(_mutex);
_stats.start = getSharedData()->getClock()->now();
}
BaseCloner::AfterStageBehavior DatabaseCloner::listCollectionsStage() {
BSONObj res;
auto collectionInfos =
getClient()->getCollectionInfos(_dbName, ListCollectionsFilter::makeTypeCollectionFilter());
stdx::unordered_set<std::string> seen;
for (auto&& info : collectionInfos) {
ListCollectionResult result;
try {
result = ListCollectionResult::parse(
IDLParserErrorContext("DatabaseCloner::listCollectionsStage"), info);
} catch (const DBException& e) {
uasserted(
ErrorCodes::FailedToParse,
e.toStatus()
.withContext(str::stream() << "Collection info could not be parsed : " << info)
.reason());
}
NamespaceString collectionNamespace(_dbName, result.getName());
if (collectionNamespace.isSystem() && !collectionNamespace.isLegalClientSystemNS()) {
LOGV2_DEBUG(21146,
1,
"Skipping 'system' collection: {namespace}",
"Database cloner skipping 'system' collection",
"namespace"_attr = collectionNamespace.ns());
continue;
}
LOGV2_DEBUG(21147,
2,
"Allowing cloning of collectionInfo: {info}",
"Allowing cloning of collectionInfo",
"info"_attr = info);
bool isDuplicate = seen.insert(result.getName().toString()).second;
uassert(51005,
str::stream() << "collection info contains duplicate collection name "
<< "'" << result.getName() << "': " << info,
isDuplicate);
// While UUID is a member of CollectionOptions, listCollections does not return the
// collectionUUID there as part of the options, but instead places it in the 'info' field.
// We need to move it back to CollectionOptions to create the collection properly.
result.getOptions().uuid = result.getInfo().getUuid();
_collections.emplace_back(collectionNamespace, result.getOptions());
}
return kContinueNormally;
}
bool DatabaseCloner::isMyFailPoint(const BSONObj& data) const {
return data["database"].str() == _dbName && BaseCloner::isMyFailPoint(data);
}
void DatabaseCloner::postStage() {
{
stdx::lock_guard<Latch> lk(_mutex);
_stats.collections = _collections.size();
_stats.collectionStats.reserve(_collections.size());
for (const auto& coll : _collections) {
_stats.collectionStats.emplace_back();
_stats.collectionStats.back().ns = coll.first.ns();
}
}
for (const auto& coll : _collections) {
auto& sourceNss = coll.first;
auto& collectionOptions = coll.second;
{
stdx::lock_guard<Latch> lk(_mutex);
_currentCollectionCloner = std::make_unique<CollectionCloner>(sourceNss,
collectionOptions,
getSharedData(),
getSource(),
getClient(),
getStorageInterface(),
getDBPool());
}
auto collStatus = _currentCollectionCloner->run();
if (collStatus.isOK()) {
LOGV2_DEBUG(21148,
1,
"collection clone finished: {namespace}",
"Collection clone finished",
"namespace"_attr = sourceNss);
} else {
LOGV2_ERROR(21149,
"collection clone for '{namespace}' failed due to {error}",
"Collection clone failed",
"namespace"_attr = sourceNss,
"error"_attr = collStatus.toString());
setInitialSyncFailedStatus(
{ErrorCodes::InitialSyncFailure,
collStatus
.withContext(str::stream()
<< "Error cloning collection '" << sourceNss.toString() << "'")
.toString()});
}
{
stdx::lock_guard<Latch> lk(_mutex);
_stats.collectionStats[_stats.clonedCollections] = _currentCollectionCloner->getStats();
_currentCollectionCloner = nullptr;
// Abort the database cloner if the collection clone failed.
if (!collStatus.isOK())
return;
_stats.clonedCollections++;
}
}
stdx::lock_guard<Latch> lk(_mutex);
_stats.end = getSharedData()->getClock()->now();
}
DatabaseCloner::Stats DatabaseCloner::getStats() const {
stdx::lock_guard<Latch> lk(_mutex);
DatabaseCloner::Stats stats = _stats;
if (_currentCollectionCloner) {
stats.collectionStats[_stats.clonedCollections] = _currentCollectionCloner->getStats();
}
return stats;
}
std::string DatabaseCloner::Stats::toString() const {
return toBSON().toString();
}
BSONObj DatabaseCloner::Stats::toBSON() const {
BSONObjBuilder bob;
bob.append("dbname", dbname);
append(&bob);
return bob.obj();
}
void DatabaseCloner::Stats::append(BSONObjBuilder* builder) const {
builder->appendNumber("collections", collections);
builder->appendNumber("clonedCollections", clonedCollections);
if (start != Date_t()) {
builder->appendDate("start", start);
if (end != Date_t()) {
builder->appendDate("end", end);
auto elapsed = end - start;
long long elapsedMillis = duration_cast<Milliseconds>(elapsed).count();
builder->appendNumber("elapsedMillis", elapsedMillis);
}
}
for (auto&& collection : collectionStats) {
BSONObjBuilder collectionBuilder(builder->subobjStart(collection.ns));
collection.append(&collectionBuilder);
collectionBuilder.doneFast();
}
}
} // namespace repl
} // namespace mongo
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