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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.
*/
#pragma once
#include "mongo/db/s/collection_metadata.h"
namespace mongo {
/**
* Contains the parts of the sharding state for a particular collection, which do not change due to
* chunk move, split and merge. The implementation is allowed to be tighly coupled with the
* CollectionShardingState from which it was derived and because of this it must not be accessed
* outside of a collection lock.
*/
class ScopedCollectionDescription {
public:
class Impl {
public:
virtual ~Impl() = default;
virtual const CollectionMetadata& get() = 0;
protected:
Impl() = default;
};
ScopedCollectionDescription(std::shared_ptr<Impl> impl) : _impl(std::move(impl)) {}
bool isSharded() const {
return _impl->get().isSharded();
}
bool isValidKey(const BSONObj& key) const {
return _impl->get().isValidKey(key);
}
boost::optional<ShardKeyPattern> getReshardingKeyIfShouldForwardOps() const {
return _impl->get().getReshardingKeyIfShouldForwardOps();
}
void throwIfReshardingInProgress(NamespaceString const& nss) const {
_impl->get().throwIfReshardingInProgress(nss);
}
// Same as getShardKeyPattern().toBSON()
const BSONObj& getKeyPattern() const {
return _impl->get().getKeyPattern();
}
const ShardKeyPattern& getShardKeyPattern() const {
return _impl->get().getShardKeyPattern();
}
const std::vector<std::unique_ptr<FieldRef>>& getKeyPatternFields() const {
return _impl->get().getKeyPatternFields();
}
BSONObj getMinKey() const {
return _impl->get().getMinKey();
}
BSONObj getMaxKey() const {
return _impl->get().getMaxKey();
}
BSONObj extractDocumentKey(const BSONObj& doc) const {
return _impl->get().extractDocumentKey(doc);
}
bool uuidMatches(UUID uuid) const {
return _impl->get().uuidMatches(uuid);
}
const boost::optional<TypeCollectionReshardingFields>& getReshardingFields() const {
return _impl->get().getReshardingFields();
}
const boost::optional<TypeCollectionTimeseriesFields>& getTimeseriesFields() const {
return _impl->get().getTimeseriesFields();
}
protected:
std::shared_ptr<Impl> _impl;
};
/**
* Contains the parts of the sharding state for a particular collection, which can change due to
* chunk move, split and merge and represents a snapshot in time of these parts, specifically the
* chunk ownership. The implementation is allowed to be tightly coupled with the
* CollectionShardingState from which it was derived, but it must be allowed to be accessed outside
* of collection lock.
*/
class ScopedCollectionFilter : public ScopedCollectionDescription {
public:
ScopedCollectionFilter(std::shared_ptr<Impl> impl)
: ScopedCollectionDescription(std::move(impl)) {}
bool keyBelongsToMe(const BSONObj& key) const {
return _impl->get().keyBelongsToMe(key);
}
};
} // namespace mongo
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