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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.
*/
#pragma once
#include "mongo/db/change_stream_options_gen.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/service_context.h"
#include "mongo/platform/mutex.h"
#include "mongo/util/concurrency/with_lock.h"
namespace mongo {
/**
* Manages fetching and storing of the change streams options. The class manages the complete read
* and write path for the change-streams options.
*/
class ChangeStreamOptionsManager {
public:
explicit ChangeStreamOptionsManager(ServiceContext* service) {}
~ChangeStreamOptionsManager() = default;
ChangeStreamOptionsManager(const ChangeStreamOptionsManager&) = delete;
ChangeStreamOptionsManager& operator=(const ChangeStreamOptionsManager&) = delete;
/**
* Creates an instance of the class using the service-context.
*/
static void create(ServiceContext* service);
/**
* Gets the instance of the class using the service context.
*/
static ChangeStreamOptionsManager& get(ServiceContext* service);
/**
* Gets the instance of the class using the operation context.
*/
static ChangeStreamOptionsManager& get(OperationContext* opCtx);
/**
* Returns the change-streams options.
*/
ChangeStreamOptions getOptions(OperationContext* opCtx) const;
/**
* Sets the provided change-streams options. Returns OK on success, otherwise appropriate error
* status is returned.
*/
StatusWith<ChangeStreamOptions> setOptions(OperationContext* opCtx,
ChangeStreamOptions optionsToSet);
/**
* Returns the clusterParameterTime of the current change stream options.
*/
const LogicalTime& getClusterParameterTime() const {
return _changeStreamOptions.getClusterParameterTime();
}
private:
ChangeStreamOptions _changeStreamOptions;
mutable Mutex _mutex = MONGO_MAKE_LATCH("ChangeStreamOptionsManager::mutex");
};
} // namespace mongo
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