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/**
* Copyright (C) 2023-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/storage/collection_truncate_markers.h"
/**
* There is up to one 'config.system.preimages' collection per tenant. This pre-images
* collection contains pre-images for every collection UUID with pre-images enabled on the tenant.
* The pre-images collection is ordered by collection UUID, so that pre-images belonging to a given
* collection are grouped together. Additionally, pre-images for a given collection UUID are stored
* in timestamp order, which makes range truncation possible.
*
* Implementation of truncate markers for pre-images associated with a single collection UUID within
* a pre-images collection.
*/
namespace mongo {
class PreImagesTruncateMarkersPerCollection final
: public CollectionTruncateMarkersWithPartialExpiration {
public:
PreImagesTruncateMarkersPerCollection(boost::optional<TenantId> tenantId,
std::deque<Marker> markers,
int64_t leftoverRecordsCount,
int64_t leftoverRecordsBytes,
int64_t minBytesPerMarker);
/**
* Creates an initial set of markers for pre-images from 'nsUUID'.
*/
static CollectionTruncateMarkers::InitialSetOfMarkers createTruncateMarkersByScanning(
OperationContext* opCtx,
RecordStore* rs,
const UUID& nsUUID,
RecordId& highestSeenRecordId,
Date_t& highestSeenWallTime);
private:
friend class PreImagesTruncateMarkersPerCollectionTest;
bool _hasExcessMarkers(OperationContext* opCtx) const override;
bool _hasPartialMarkerExpired(OperationContext* opCtx) const override;
/**
* When initialized, indicates this is a serverless environment.
*/
boost::optional<TenantId> _tenantId;
};
} // namespace mongo
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