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/**
* Copyright (C) 2018 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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/committed_optime_metadata_hook.h"
#include "mongo/s/client/shard.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/grid.h"
namespace mongo {
namespace rpc {
namespace {
const char kLastCommittedOpTimeFieldName[] = "lastCommittedOpTime";
}
CommittedOpTimeMetadataHook::CommittedOpTimeMetadataHook(ServiceContext* service)
: _service(service) {}
Status CommittedOpTimeMetadataHook::writeRequestMetadata(OperationContext* opCtx,
BSONObjBuilder* metadataBob) {
return Status::OK();
}
Status CommittedOpTimeMetadataHook::readReplyMetadata(OperationContext* opCtx,
StringData replySource,
const BSONObj& metadataObj) {
auto lastCommittedOpTimeField = metadataObj[kLastCommittedOpTimeFieldName];
if (lastCommittedOpTimeField.eoo()) {
return Status::OK();
}
invariant(lastCommittedOpTimeField.type() == BSONType::bsonTimestamp);
// replySource is the HostAndPort of a single server, except when this hook is triggered
// through DBClientReplicaSet, when it will be a replica set connection string. The
// shardRegistry stores connection strings and hosts in its lookup table, in addition to shard
// ids, so replySource can be correctly passed on to ShardRegistry::getShardNoReload.
auto shard = Grid::get(_service)->shardRegistry()->getShardNoReload(replySource.toString());
if (shard) {
shard->updateLastCommittedOpTime(LogicalTime(lastCommittedOpTimeField.timestamp()));
}
return Status::OK();
}
} // namespace rpc
} // namespace mongo
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