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/**
* Copyright (C) 2020-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::kStorage
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/catalog_raii.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/dbhelpers.h"
#include "mongo/db/index_build_entry_helpers.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/tenant_migration_state_machine_gen.h"
#include "mongo/db/storage/write_unit_of_work.h"
#include "mongo/util/str.h"
namespace mongo {
namespace repl {
namespace {
/**
* Creates the tenant migration recipients collection if it doesn't exist.
* Note: Throws WriteConflictException if the collection already exist.
*/
const Collection* ensureTenantMigrationRecipientsCollectionExists(OperationContext* opCtx,
Database* db,
const NamespaceString& nss) {
// Sanity checks.
invariant(db);
invariant(opCtx->lockState()->isCollectionLockedForMode(nss, MODE_IX));
auto collection = CollectionCatalog::get(opCtx).lookupCollectionByNamespace(opCtx, nss);
if (!collection) {
WriteUnitOfWork wuow(opCtx);
collection = db->createCollection(opCtx, nss, CollectionOptions());
// Ensure the collection exists.
invariant(collection);
wuow.commit();
}
return collection;
}
} // namespace
namespace tenantMigrationRecipientEntryHelpers {
Status insertStateDoc(OperationContext* opCtx, const TenantMigrationRecipientDocument& stateDoc) {
const auto nss = NamespaceString::kTenantMigrationRecipientsNamespace;
return writeConflictRetry(opCtx, "insertStateDoc", nss.ns(), [&]() -> Status {
// TODO SERVER-50741: Should be replaced by AutoGetCollection.
AutoGetOrCreateDb db(opCtx, nss.db(), MODE_IX);
Lock::CollectionLock collLock(opCtx, nss, MODE_IX);
uassert(ErrorCodes::PrimarySteppedDown,
str::stream() << "No longer primary while attempting to insert tenant migration "
"recipient state document",
repl::ReplicationCoordinator::get(opCtx)->canAcceptWritesFor(opCtx, nss));
// TODO SERVER-50741: ensureTenantMigrationRecipientsCollectionExists() should be removed
// and this should return ErrorCodes::NamespaceNotFound when collection is missing.
auto collection = ensureTenantMigrationRecipientsCollectionExists(opCtx, db.getDb(), nss);
WriteUnitOfWork wuow(opCtx);
Status status =
collection->insertDocument(opCtx, InsertStatement(stateDoc.toBSON()), nullptr);
if (!status.isOK()) {
return status;
}
wuow.commit();
return Status::OK();
});
}
StatusWith<TenantMigrationRecipientDocument> getStateDoc(OperationContext* opCtx,
const UUID& migrationUUID) {
// Read the most up to date data.
ReadSourceScope readSourceScope(opCtx, RecoveryUnit::ReadSource::kNoTimestamp);
AutoGetCollectionForRead autoCollection(opCtx,
NamespaceString::kTenantMigrationRecipientsNamespace);
const Collection* collection = autoCollection.getCollection();
if (!collection) {
return Status(ErrorCodes::NamespaceNotFound,
str::stream() << "Collection not found: "
<< NamespaceString::kTenantMigrationRecipientsNamespace.ns());
}
BSONObj result;
auto foundDoc = Helpers::findOne(
opCtx, collection, BSON("_id" << migrationUUID), result, /*requireIndex=*/true);
if (!foundDoc) {
return Status(ErrorCodes::NoMatchingDocument,
str::stream() << "No matching state doc found with tenant migration UUID: "
<< migrationUUID);
}
try {
return TenantMigrationRecipientDocument::parse(IDLParserErrorContext("recipientStateDoc"),
result);
} catch (DBException& ex) {
return ex.toStatus(
str::stream() << "Invalid BSON found for matching document with tenant migration UUID: "
<< migrationUUID << " , res: " << result);
}
}
} // namespace tenantMigrationRecipientEntryHelpers
} // namespace repl
} // namespace mongo
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