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/**
* Copyright (C) 2021-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/db/s/sharding_write_router.h"
namespace mongo {
ShardingWriteRouter::ShardingWriteRouter(OperationContext* opCtx,
const NamespaceString& nss,
CatalogCache* catalogCache) {
if (serverGlobalParams.clusterRole == ClusterRole::ShardServer) {
_scopedCss.emplace(CollectionShardingState::assertCollectionLockedAndAcquire(opCtx, nss));
_collDesc = (*_scopedCss)->getCollectionDescription(opCtx);
if (!_collDesc->isSharded()) {
invariant(!_collDesc->getReshardingKeyIfShouldForwardOps());
return;
}
_reshardingKeyPattern = _collDesc->getReshardingKeyIfShouldForwardOps();
if (_reshardingKeyPattern) {
_ownershipFilter =
(*_scopedCss)
->getOwnershipFilter(
opCtx, CollectionShardingState::OrphanCleanupPolicy::kAllowOrphanCleanup);
const auto& reshardingFields = _collDesc->getReshardingFields();
invariant(reshardingFields);
const auto& donorFields = reshardingFields->getDonorFields();
invariant(donorFields);
_reshardingChunkMgr = uassertStatusOK(catalogCache->getCollectionPlacementInfo(
opCtx, donorFields->getTempReshardingNss(), true /* allowLocks */));
tassert(6862800,
"Routing information for the temporary resharing collection is stale",
_reshardingChunkMgr->isSharded());
}
}
}
boost::optional<ShardId> ShardingWriteRouter::getReshardingDestinedRecipient(
const BSONObj& fullDocument) const {
if (!_reshardingKeyPattern) {
return boost::none;
}
invariant(_ownershipFilter);
invariant(_reshardingChunkMgr);
const auto& shardKeyPattern = _collDesc->getShardKeyPattern();
if (!_ownershipFilter->keyBelongsToMe(shardKeyPattern.extractShardKeyFromDoc(fullDocument))) {
return boost::none;
}
auto shardKey = _reshardingKeyPattern->extractShardKeyFromDocThrows(fullDocument);
return _reshardingChunkMgr->findIntersectingChunkWithSimpleCollation(shardKey).getShardId();
}
} // namespace mongo
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