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/**
* Copyright (C) 2022-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.
*/
#include "mongo/s/router_role.h"
#include "mongo/logv2/log.h"
#include "mongo/s/grid.h"
#include "mongo/s/stale_exception.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kSharding
namespace mongo {
namespace sharding {
namespace router {
RouterBase::RouterBase(ServiceContext* service) : _service(service) {}
DBPrimaryRouter::DBPrimaryRouter(ServiceContext* service, StringData db)
: RouterBase(service), _db(db.toString()) {}
void DBPrimaryRouter::appendDDLRoutingTokenToCommand(const DatabaseType& dbt,
BSONObjBuilder* builder) {
const auto& dbVersion = dbt.getVersion();
if (!dbVersion.isFixed()) {
BSONObjBuilder dbvBuilder(builder->subobjStart(DatabaseVersion::kDatabaseVersionField));
dbVersion.serialize(&dbvBuilder);
}
}
void DBPrimaryRouter::appendCRUDUnshardedRoutingTokenToCommand(const ShardId& shardId,
const DatabaseVersion& dbVersion,
BSONObjBuilder* builder) {
if (!dbVersion.isFixed()) {
BSONObjBuilder dbvBuilder(builder->subobjStart(DatabaseVersion::kDatabaseVersionField));
dbVersion.serialize(&dbvBuilder);
}
ShardVersion::UNSHARDED().serialize(ShardVersion::kShardVersionField, builder);
}
CachedDatabaseInfo DBPrimaryRouter::_getRoutingInfo(OperationContext* opCtx) const {
auto catalogCache = Grid::get(_service)->catalogCache();
return uassertStatusOK(catalogCache->getDatabase(opCtx, _db));
}
void DBPrimaryRouter::_onException(RouteContext* context, Status s) {
auto catalogCache = Grid::get(_service)->catalogCache();
if (s == ErrorCodes::StaleDbVersion) {
auto si = s.extraInfo<StaleDbRoutingVersion>();
tassert(6375900, "StaleDbVersion must have extraInfo", si);
tassert(6375901,
str::stream() << "StaleDbVersion on unexpected database. Expected " << _db
<< ", received " << si->getDb(),
si->getDb() == _db);
catalogCache->onStaleDatabaseVersion(si->getDb(), si->getVersionWanted());
} else {
uassertStatusOK(s);
}
if (++context->numAttempts > kMaxNumStaleVersionRetries) {
uassertStatusOKWithContext(
s,
str::stream() << "Exceeded maximum number of " << kMaxNumStaleVersionRetries
<< " retries attempting \'" << context->comment << "\'");
} else {
LOGV2_DEBUG(6375902,
3,
"Retrying database primary routing operation",
"attempt"_attr = context->numAttempts,
"comment"_attr = context->comment,
"status"_attr = s);
}
}
CollectionRouter::CollectionRouter(ServiceContext* service, NamespaceString nss)
: RouterBase(service), _nss(std::move(nss)) {}
void CollectionRouter::appendCRUDRoutingTokenToCommand(const ShardId& shardId,
const CollectionRoutingInfo& cri,
BSONObjBuilder* builder) {
auto chunkVersion(cri.cm.getVersion(shardId));
auto collectionIndexes(cri.gii ? boost::make_optional(cri.gii->getCollectionIndexes())
: boost::none);
if (chunkVersion == ChunkVersion::UNSHARDED()) {
// Need to add the database version as well
const auto& dbVersion = cri.cm.dbVersion();
if (!dbVersion.isFixed()) {
BSONObjBuilder dbvBuilder(builder->subobjStart(DatabaseVersion::kDatabaseVersionField));
dbVersion.serialize(&dbvBuilder);
}
}
ShardVersion(chunkVersion, collectionIndexes)
.serialize(ShardVersion::kShardVersionField, builder);
}
CollectionRoutingInfo CollectionRouter::_getRoutingInfo(OperationContext* opCtx) const {
auto catalogCache = Grid::get(_service)->catalogCache();
return uassertStatusOK(catalogCache->getCollectionRoutingInfo(opCtx, _nss));
}
void CollectionRouter::_onException(RouteContext* context, Status s) {
auto catalogCache = Grid::get(_service)->catalogCache();
if (s == ErrorCodes::StaleDbVersion) {
auto si = s.extraInfo<StaleDbRoutingVersion>();
tassert(6375903, "StaleDbVersion must have extraInfo", si);
catalogCache->onStaleDatabaseVersion(si->getDb(), si->getVersionWanted());
} else if (s == ErrorCodes::StaleConfig) {
auto si = s.extraInfo<StaleConfigInfo>();
tassert(6375904, "StaleConfig must have extraInfo", si);
catalogCache->invalidateShardOrEntireCollectionEntryForShardedCollection(
si->getNss(), si->getVersionWanted(), si->getShardId());
} else if (s == ErrorCodes::StaleEpoch) {
auto si = s.extraInfo<StaleEpochInfo>();
tassert(6375905, "StaleEpoch must have extra info", si);
catalogCache->invalidateShardOrEntireCollectionEntryForShardedCollection(
si->getNss(), si->getVersionWanted(), ShardId());
} else {
uassertStatusOK(s);
}
if (++context->numAttempts > kMaxNumStaleVersionRetries) {
uassertStatusOKWithContext(
s,
str::stream() << "Exceeded maximum number of " << kMaxNumStaleVersionRetries
<< " retries attempting \'" << context->comment << "\'");
} else {
LOGV2_DEBUG(6375906,
3,
"Retrying collection routing operation",
"attempt"_attr = context->numAttempts,
"comment"_attr = context->comment,
"status"_attr = s);
}
}
} // namespace router
} // namespace sharding
} // namespace mongo
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