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/**
* Copyright (C) 2017 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/db/logical_time_metadata_hook.h"
#include "mongo/db/logical_clock.h"
#include "mongo/db/logical_time_validator.h"
#include "mongo/db/operation_time_tracker.h"
#include "mongo/db/server_options.h"
#include "mongo/rpc/metadata/logical_time_metadata.h"
#include "mongo/stdx/memory.h"
namespace mongo {
namespace rpc {
namespace {
const char kOperationTimeFieldName[] = "operationTime";
}
LogicalTimeMetadataHook::LogicalTimeMetadataHook(ServiceContext* service) : _service(service) {}
Status LogicalTimeMetadataHook::writeRequestMetadata(OperationContext* opCtx,
BSONObjBuilder* metadataBob) {
auto validator = LogicalTimeValidator::get(_service);
if (!validator || !LogicalClock::get(_service)->isEnabled()) {
return Status::OK();
}
auto newTime = LogicalClock::get(_service)->getClusterTime();
LogicalTimeMetadata metadata(validator->trySignLogicalTime(newTime));
metadata.writeToMetadata(metadataBob);
return Status::OK();
}
Status LogicalTimeMetadataHook::readReplyMetadata(OperationContext* opCtx,
StringData replySource,
const BSONObj& metadataObj) {
auto parseStatus = LogicalTimeMetadata::readFromMetadata(metadataObj);
if (!parseStatus.isOK()) {
return parseStatus.getStatus();
}
auto& signedTime = parseStatus.getValue().getSignedTime();
// LogicalTimeMetadata is default constructed if no cluster time metadata was sent, so a
// default constructed SignedLogicalTime should be ignored.
if (signedTime.getTime() == LogicalTime::kUninitialized ||
!LogicalClock::get(_service)->isEnabled()) {
return Status::OK();
}
if (serverGlobalParams.featureCompatibility.getVersion() !=
ServerGlobalParams::FeatureCompatibility::Version::kFullyUpgradedTo36) {
return Status::OK();
}
if (opCtx) {
auto timeTracker = OperationTimeTracker::get(opCtx);
auto operationTime = metadataObj[kOperationTimeFieldName];
if (!operationTime.eoo()) {
invariant(operationTime.type() == BSONType::bsonTimestamp);
timeTracker->updateOperationTime(LogicalTime(operationTime.timestamp()));
}
}
return LogicalClock::get(_service)->advanceClusterTime(signedTime.getTime());
}
} // namespace rpc
} // namespace mongo
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