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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/platform/basic.h"
#include "mongo/s/cluster_ddl.h"
#include "mongo/s/cluster_commands_helpers.h"
#include "mongo/s/grid.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kSharding
namespace mongo {
namespace cluster {
namespace {
std::vector<AsyncRequestsSender::Request> buildUnshardedRequestsForAllShards(
OperationContext* opCtx, std::vector<ShardId> shardIds, const BSONObj& cmdObj) {
auto cmdToSend = cmdObj;
appendShardVersion(cmdToSend, ShardVersion::UNSHARDED());
std::vector<AsyncRequestsSender::Request> requests;
for (auto&& shardId : shardIds)
requests.emplace_back(std::move(shardId), cmdToSend);
return requests;
}
AsyncRequestsSender::Response executeCommandAgainstDatabasePrimaryOrFirstShard(
OperationContext* opCtx,
StringData dbName,
const CachedDatabaseInfo& dbInfo,
const BSONObj& cmdObj,
const ReadPreferenceSetting& readPref,
Shard::RetryPolicy retryPolicy) {
ShardId shardId;
if (dbName == DatabaseName::kConfig.db()) {
auto shardIds = Grid::get(opCtx)->shardRegistry()->getAllShardIds(opCtx);
uassert(ErrorCodes::IllegalOperation, "there are no shards to target", !shardIds.empty());
std::sort(shardIds.begin(), shardIds.end());
shardId = shardIds[0];
} else {
shardId = dbInfo->getPrimary();
}
auto responses =
gatherResponses(opCtx,
dbName,
readPref,
retryPolicy,
buildUnshardedRequestsForAllShards(
opCtx, {shardId}, appendDbVersionIfPresent(cmdObj, dbInfo)));
return std::move(responses.front());
}
} // namespace
CachedDatabaseInfo createDatabase(OperationContext* opCtx,
StringData dbName,
const boost::optional<ShardId>& suggestedPrimaryId) {
auto catalogCache = Grid::get(opCtx)->catalogCache();
auto dbStatus = catalogCache->getDatabase(opCtx, dbName);
if (dbStatus == ErrorCodes::NamespaceNotFound) {
ConfigsvrCreateDatabase request(dbName.toString());
request.setDbName(DatabaseName::kAdmin);
if (suggestedPrimaryId)
request.setPrimaryShardId(*suggestedPrimaryId);
auto configShard = Grid::get(opCtx)->shardRegistry()->getConfigShard();
auto response = uassertStatusOK(configShard->runCommandWithFixedRetryAttempts(
opCtx,
ReadPreferenceSetting(ReadPreference::PrimaryOnly),
"admin",
CommandHelpers::appendMajorityWriteConcern(request.toBSON({})),
Shard::RetryPolicy::kIdempotent));
uassertStatusOK(response.writeConcernStatus);
uassertStatusOKWithContext(response.commandStatus,
str::stream()
<< "Database " << dbName << " could not be created");
auto createDbResponse = ConfigsvrCreateDatabaseResponse::parse(
IDLParserContext("configsvrCreateDatabaseResponse"), response.response);
catalogCache->onStaleDatabaseVersion(dbName, createDbResponse.getDatabaseVersion());
dbStatus = catalogCache->getDatabase(opCtx, dbName);
}
return uassertStatusOK(std::move(dbStatus));
}
void createCollection(OperationContext* opCtx, const ShardsvrCreateCollection& request) {
const auto& nss = request.getNamespace();
const auto dbInfo = createDatabase(opCtx, nss.db());
auto cmdResponse = executeCommandAgainstDatabasePrimaryOrFirstShard(
opCtx,
nss.db(),
dbInfo,
CommandHelpers::appendMajorityWriteConcern(request.toBSON({})),
ReadPreferenceSetting(ReadPreference::PrimaryOnly),
Shard::RetryPolicy::kIdempotent);
const auto remoteResponse = uassertStatusOK(cmdResponse.swResponse);
uassertStatusOK(getStatusFromCommandResult(remoteResponse.data));
auto createCollResp =
CreateCollectionResponse::parse(IDLParserContext("createCollection"), remoteResponse.data);
auto catalogCache = Grid::get(opCtx)->catalogCache();
catalogCache->invalidateShardOrEntireCollectionEntryForShardedCollection(
nss, createCollResp.getCollectionVersion(), dbInfo->getPrimary());
}
} // namespace cluster
} // namespace mongo
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