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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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/vector_clock_mutable.h"
namespace mongo {
namespace {
/**
* Vector clock implementation for non-distributed environments (embedded, some unittests).
*/
class VectorClockTrivial : public VectorClockMutable {
VectorClockTrivial(const VectorClockTrivial&) = delete;
VectorClockTrivial& operator=(const VectorClockTrivial&) = delete;
public:
VectorClockTrivial();
virtual ~VectorClockTrivial();
private:
// VectorClock methods implementation
bool _gossipOutInternal(OperationContext* opCtx,
BSONObjBuilder* out,
const LogicalTimeArray& time) const override;
bool _gossipOutExternal(OperationContext* opCtx,
BSONObjBuilder* out,
const LogicalTimeArray& time) const override;
LogicalTimeArray _gossipInInternal(OperationContext* opCtx,
const BSONObj& in,
bool couldBeUnauthenticated) override;
LogicalTimeArray _gossipInExternal(OperationContext* opCtx,
const BSONObj& in,
bool couldBeUnauthenticated) override;
bool _permitRefreshDuringGossipOut() const override {
return false;
}
// VectorClockMutable methods implementation
LogicalTime _tick(Component component, uint64_t nTicks) override;
void _tickTo(Component component, LogicalTime newTime) override;
};
const auto vectorClockTrivialDecoration = ServiceContext::declareDecoration<VectorClockTrivial>();
ServiceContext::ConstructorActionRegisterer vectorClockTrivialRegisterer(
"VectorClockTrivial-VectorClockRegistration",
{},
[](ServiceContext* service) {
VectorClockTrivial::registerVectorClockOnServiceContext(
service, &vectorClockTrivialDecoration(service));
},
{});
VectorClockTrivial::VectorClockTrivial() = default;
VectorClockTrivial::~VectorClockTrivial() = default;
bool VectorClockTrivial::_gossipOutInternal(OperationContext* opCtx,
BSONObjBuilder* out,
const LogicalTimeArray& time) const {
// Clocks are not gossipped in trivial (non-distributed) environments.
return false;
}
bool VectorClockTrivial::_gossipOutExternal(OperationContext* opCtx,
BSONObjBuilder* out,
const LogicalTimeArray& time) const {
// Clocks are not gossipped in trivial (non-distributed) environments.
return false;
}
VectorClock::LogicalTimeArray VectorClockTrivial::_gossipInInternal(OperationContext* opCtx,
const BSONObj& in,
bool couldBeUnauthenticated) {
// Clocks are not gossipped in trivial (non-distributed) environments.
return {};
}
VectorClock::LogicalTimeArray VectorClockTrivial::_gossipInExternal(OperationContext* opCtx,
const BSONObj& in,
bool couldBeUnauthenticated) {
// Clocks are not gossipped in trivial (non-distributed) environments.
return {};
}
LogicalTime VectorClockTrivial::_tick(Component component, uint64_t nTicks) {
return _advanceComponentTimeByTicks(component, nTicks);
}
void VectorClockTrivial::_tickTo(Component component, LogicalTime newTime) {
_advanceComponentTimeTo(component, std::move(newTime));
}
} // namespace
} // namespace mongo
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