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/**
* Copyright (C) 2018-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/database_version.h"
namespace mongo {
AtomicWord<uint64_t> ComparableDatabaseVersion::_uuidDisambiguatingSequenceNumSource{1ULL};
DatabaseVersion DatabaseVersion::makeFixed() {
DatabaseVersion dbVersion;
dbVersion.setLastMod(0);
dbVersion.setUuid(UUID::gen());
return dbVersion;
}
DatabaseVersion DatabaseVersion::makeUpdated() const {
DatabaseVersion newVersion = *this;
newVersion.setLastMod(newVersion.getLastMod() + 1);
return newVersion;
}
ComparableDatabaseVersion ComparableDatabaseVersion::makeComparableDatabaseVersion(
const DatabaseVersion& version) {
return ComparableDatabaseVersion(version, _uuidDisambiguatingSequenceNumSource.fetchAndAdd(1));
}
BSONObj ComparableDatabaseVersion::toBSONForLogging() const {
BSONObjBuilder builder;
if (_dbVersion)
builder.append("dbVersion"_sd, _dbVersion->toBSON());
else
builder.append("dbVersion"_sd, "None");
builder.append("uuidDisambiguatingSequenceNum"_sd,
static_cast<int64_t>(_uuidDisambiguatingSequenceNum));
return builder.obj();
}
bool ComparableDatabaseVersion::operator==(const ComparableDatabaseVersion& other) const {
if (!_dbVersion && !other._dbVersion)
return true; // Default constructed value
if (_dbVersion.is_initialized() != other._dbVersion.is_initialized())
return false; // One side is default constructed value
return *_dbVersion == *other._dbVersion;
}
bool ComparableDatabaseVersion::operator<(const ComparableDatabaseVersion& other) const {
if (!_dbVersion && !other._dbVersion)
return false; // Default constructed value
if (_dbVersion && other._dbVersion && _dbVersion->getUuid() == other._dbVersion->getUuid()) {
return _dbVersion->getLastMod() < other._dbVersion->getLastMod();
} else {
return _uuidDisambiguatingSequenceNum < other._uuidDisambiguatingSequenceNum;
}
}
} // namespace mongo
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