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/**
* Copyright (C) 2022-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/s/sharding_index_catalog_cache.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kSharding
namespace mongo {
bool ShardingIndexesCatalogCache::empty() const {
return _indexes.empty();
}
CollectionIndexes ShardingIndexesCatalogCache::getCollectionIndexes() const {
return _collectionIndexes;
}
size_t ShardingIndexesCatalogCache::numIndexes() const {
return _indexes.size();
}
bool ShardingIndexesCatalogCache::contains(const StringData& name) const {
return _indexes.contains(name);
}
void ShardingIndexesCatalogCache::add(const IndexCatalogType& index,
const CollectionIndexes& collectionIndexes) {
tassert(7019900,
str::stream() << "Cannot add global index with different uuid than is in the "
"ShardingIndexesCatalogCache.",
collectionIndexes.uuid() == _collectionIndexes.uuid());
_collectionIndexes = collectionIndexes;
_indexes.emplace(index.getName(), index);
}
void ShardingIndexesCatalogCache::remove(const StringData& name,
const CollectionIndexes& collectionIndexes) {
tassert(7019901,
str::stream() << "Cannot remove global index with different uuid than is in the "
"ShardingIndexesCatalogCache.",
collectionIndexes.uuid() == _collectionIndexes.uuid());
_collectionIndexes = collectionIndexes;
_indexes.erase(name);
}
AtomicWord<uint64_t> ComparableIndexVersion::_disambiguatingSequenceNumSource{1ULL};
AtomicWord<uint64_t> ComparableIndexVersion::_forcedRefreshSequenceNumSource{1ULL};
ComparableIndexVersion ComparableIndexVersion::makeComparableIndexVersion(
const boost::optional<Timestamp>& version) {
return ComparableIndexVersion(_forcedRefreshSequenceNumSource.load(),
version,
_disambiguatingSequenceNumSource.fetchAndAdd(1));
}
ComparableIndexVersion ComparableIndexVersion::makeComparableIndexVersionForForcedRefresh() {
return ComparableIndexVersion(_forcedRefreshSequenceNumSource.addAndFetch(2) - 1,
boost::none,
_disambiguatingSequenceNumSource.fetchAndAdd(1));
}
void ComparableIndexVersion::setCollectionIndexes(const boost::optional<Timestamp>& version) {
_indexVersion = version;
}
std::string ComparableIndexVersion::toString() const {
BSONObjBuilder builder;
if (_indexVersion)
builder.append("collectionIndexes"_sd, _indexVersion->toString());
else
builder.append("collectionIndexes"_sd, "None");
builder.append("forcedRefreshSequenceNum"_sd, static_cast<int64_t>(_forcedRefreshSequenceNum));
builder.append("disambiguatingSequenceNum"_sd,
static_cast<int64_t>(_disambiguatingSequenceNum));
return builder.obj().toString();
}
bool ComparableIndexVersion::operator==(const ComparableIndexVersion& other) const {
if (_forcedRefreshSequenceNum != other._forcedRefreshSequenceNum)
return false; // Values with different forced refresh sequence numbers are always
// considered different, regardless of the underlying versions
if (_forcedRefreshSequenceNum == 0)
return true; // Only default constructed values have _forcedRefreshSequenceNum == 0 and
// they are always equal
// Relying on the boost::optional<Timestamp>::operator== comparison
return _indexVersion == other._indexVersion;
}
bool ComparableIndexVersion::operator<(const ComparableIndexVersion& other) const {
if (_forcedRefreshSequenceNum < other._forcedRefreshSequenceNum)
return true; // Values with different forced refresh sequence numbers are always considered
// different, regardless of the underlying versions
if (_forcedRefreshSequenceNum > other._forcedRefreshSequenceNum)
return false; // Values with different forced refresh sequence numbers are always
// considered different, regardless of the underlying versions
if (_forcedRefreshSequenceNum == 0)
return false; // Only default constructed values have _forcedRefreshSequenceNum == 0 and
// they are always equal
if (_indexVersion.is_initialized() != other._indexVersion.is_initialized())
return _disambiguatingSequenceNum <
other._disambiguatingSequenceNum; // If one value is set and the other is not, we must
// rely on the disambiguating sequence number
return _indexVersion < other._indexVersion;
}
} // namespace mongo
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