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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/session_catalog.h"
namespace mongo {
class MongoDSessionCatalog {
public:
/**
* Invoked when the node enters the primary state. Ensures that the transactions collection is
* created. Throws on severe exceptions due to which it is not safe to continue the step-up
* process.
*/
static void onStepUp(OperationContext* opCtx);
/**
* Fetches the UUID of the transaction table, or an empty optional if the collection does not
* exist or has no UUID. Acquires a lock on the collection.
*
* Required for rollback via refetch.
*/
static boost::optional<UUID> getTransactionTableUUID(OperationContext* opCtx);
/**
* Callback to be invoked when it is suspected that the on-disk session contents might not be in
* sync with what is in the sessions cache.
*
* If no specific document is available, the method will invalidate all sessions. Otherwise if
* one is avaiable (which is the case for insert/update/delete), it must contain _id field with
* a valid session entry, in which case only that particular session will be invalidated. If the
* _id field is missing or doesn't contain a valid serialization of logical session, the method
* will throw. This prevents invalid entries from making it in the collection.
*/
static void invalidateSessions(OperationContext* opCtx,
boost::optional<BSONObj> singleSessionDoc);
};
} // namespace mongo
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