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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/db/global_index.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/db/catalog/clustered_collection_util.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/catalog_raii.h"
#include "mongo/db/concurrency/exception_util.h"
#include "mongo/db/index_builds_coordinator.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/op_observer/op_observer.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/transaction/retryable_writes_stats.h"
#include "mongo/db/transaction/transaction_participant.h"
#include "mongo/logv2/log.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kIndex
namespace mongo::global_index {
void createContainer(OperationContext* opCtx, const UUID& indexUUID) {
// StmtId will always be 0, as the command only replicates a createGlobalIndex oplog entry.
constexpr StmtId stmtId = 0;
if (opCtx->isRetryableWrite()) {
const auto txnParticipant = TransactionParticipant::get(opCtx);
if (txnParticipant.checkStatementExecuted(opCtx, stmtId)) {
RetryableWritesStats::get(opCtx)->incrementRetriedCommandsCount();
RetryableWritesStats::get(opCtx)->incrementRetriedStatementsCount();
LOGV2_DEBUG(6789203,
1,
"_shardsvrCreateGlobalIndex retried statement already executed",
"indexUUID"_attr = indexUUID);
return;
}
}
const auto nss = NamespaceString::makeGlobalIndexNSS(indexUUID);
LOGV2(6789200, "Create global index container", "indexUUID"_attr = indexUUID);
// Create the container.
return writeConflictRetry(opCtx, "createGlobalIndexContainer", nss.ns(), [&]() {
const auto indexKeySpec = BSON("v" << 2 << "name"
<< "indexKey_1"
<< "key" << BSON("indexKey" << 1) << "unique" << true);
WriteUnitOfWork wuow(opCtx);
// createIndexesOnEmptyCollection requires the MODE_X collection lock.
AutoGetCollection autoColl(opCtx, nss, MODE_X);
if (!CollectionCatalog::get(opCtx)->lookupCollectionByNamespace(opCtx, nss)) {
{
repl::UnreplicatedWritesBlock unreplicatedWrites(opCtx);
auto db = autoColl.ensureDbExists(opCtx);
CollectionOptions collOptions;
collOptions.clusteredIndex = clustered_util::makeDefaultClusteredIdIndex();
collOptions.uuid = indexUUID;
db->createCollection(opCtx, nss, collOptions);
CollectionWriter writer(opCtx, nss);
IndexBuildsCoordinator::get(opCtx)->createIndexesOnEmptyCollection(
opCtx, writer, {indexKeySpec}, false);
}
auto opObserver = opCtx->getServiceContext()->getOpObserver();
opObserver->onCreateGlobalIndex(opCtx, nss, indexUUID);
wuow.commit();
} else {
// Container already exists, this can happen when attempting to create a global index
// that already exists. Sanity check its storage format.
tassert(6789204,
str::stream() << "Collection with UUID " << indexUUID
<< " already exists but it's not clustered.",
autoColl->getCollectionOptions().clusteredIndex);
tassert(6789205,
str::stream() << "Collection with UUID " << indexUUID
<< " already exists but it's missing a unique index on "
"'indexKey'.",
autoColl->getIndexCatalog()->findIndexByKeyPatternAndOptions(
opCtx,
BSON("indexKey" << 1),
indexKeySpec,
IndexCatalog::InclusionPolicy::kReady));
tassert(6789206,
str::stream() << "Collection with namespace " << nss.ns()
<< " already exists but it has inconsistent UUID "
<< autoColl->uuid().toString() << ".",
autoColl->uuid() == indexUUID);
LOGV2(6789201, "Global index container already exists", "indexUUID"_attr = indexUUID);
}
return;
});
}
} // namespace mongo::global_index
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