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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/db/catalog/collection.h"
#include <sstream>
#include "mongo/logv2/log.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kStorage
namespace mongo {
CollectionPtr CollectionPtr::null;
CollectionPtr::CollectionPtr(const Collection* collection) : _collection(collection) {}
CollectionPtr::CollectionPtr(CollectionPtr&&) = default;
CollectionPtr::~CollectionPtr() {}
CollectionPtr& CollectionPtr::operator=(CollectionPtr&&) = default;
bool CollectionPtr::yieldable() const {
// We only set the opCtx when this CollectionPtr is yieldable.
return _opCtx || !_collection;
}
void CollectionPtr::yield() const {
// Yield if we are yieldable and have a valid collection
if (_collection) {
invariant(_opCtx);
_yieldedUUID = _collection->uuid();
_collection = nullptr;
}
}
void CollectionPtr::restore() const {
// Restore from yield if we are yieldable and if uuid was set in a previous yield.
invariant(_opCtx);
if (_yieldedUUID) {
// We may only do yield restore when we were holding locks that was yielded so we need to
// refresh from the catalog to make sure we have a valid collection pointer.
_collection = _restoreFn(_opCtx, *_yieldedUUID);
_yieldedUUID.reset();
}
}
void CollectionPtr::setShardKeyPattern(const BSONObj& shardKeyPattern) {
_shardKeyPattern.emplace(shardKeyPattern.getOwned());
}
const ShardKeyPattern& CollectionPtr::getShardKeyPattern() const {
invariant(_shardKeyPattern);
return *_shardKeyPattern;
}
// ----
namespace {
const auto getFactory = ServiceContext::declareDecoration<std::unique_ptr<Collection::Factory>>();
} // namespace
Collection::Factory* Collection::Factory::get(ServiceContext* service) {
return getFactory(service).get();
}
Collection::Factory* Collection::Factory::get(OperationContext* opCtx) {
return getFactory(opCtx->getServiceContext()).get();
}
void Collection::Factory::set(ServiceContext* service,
std::unique_ptr<Collection::Factory> newFactory) {
auto& factory = getFactory(service);
factory = std::move(newFactory);
}
std::pair<std::unique_ptr<CollatorInterface>, ExpressionContext::CollationMatchesDefault>
resolveCollator(OperationContext* opCtx, BSONObj userCollation, const CollectionPtr& collection) {
if (!collection || !collection->getDefaultCollator()) {
if (userCollation.isEmpty()) {
return {nullptr, ExpressionContext::CollationMatchesDefault::kNoDefault};
} else {
return {getUserCollator(opCtx, userCollation),
ExpressionContext::CollationMatchesDefault::kNoDefault};
}
}
auto defaultCollator = collection->getDefaultCollator()->clone();
if (userCollation.isEmpty()) {
return {std::move(defaultCollator), ExpressionContext::CollationMatchesDefault::kYes};
}
auto userCollator = getUserCollator(opCtx, userCollation);
if (CollatorInterface::collatorsMatch(defaultCollator.get(), userCollator.get())) {
return {std::move(defaultCollator), ExpressionContext::CollationMatchesDefault::kYes};
} else {
return {std::move(userCollator), ExpressionContext::CollationMatchesDefault::kNo};
}
}
} // namespace mongo
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