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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/base/disallow_copying.h"
#include "mongo/db/server_parameters.h"
#include "mongo/db/storage/wiredtiger/wiredtiger_kv_engine.h"
namespace mongo {
/**
* WT_CONNECTION::reconfigure get/setParameter support
*/
class WiredTigerEngineRuntimeConfigParameter : public ServerParameter {
MONGO_DISALLOW_COPYING(WiredTigerEngineRuntimeConfigParameter);
public:
explicit WiredTigerEngineRuntimeConfigParameter(WiredTigerKVEngine* engine);
/**
* Appends the last value that was successfully assigned via a call to `set` or
* `setFromString`. To conclude what options WiredTiger is running with, consult what MongoDB
* logged at startup when making the `wiredtiger_open` call.
*/
virtual void append(OperationContext* opCtx, BSONObjBuilder& b, const std::string& name);
virtual Status set(const BSONElement& newValueElement);
virtual Status setFromString(const std::string& str);
private:
WiredTigerKVEngine* _engine;
// This parameter can only be modified at runtime via `setParameter`. This string always
// starts out as the empty string.
std::string _currentValue;
};
class WiredTigerMaxCacheOverflowSizeGBParameter : public ServerParameter {
MONGO_DISALLOW_COPYING(WiredTigerMaxCacheOverflowSizeGBParameter);
public:
WiredTigerMaxCacheOverflowSizeGBParameter(WiredTigerKVEngine* engine, double value);
virtual void append(OperationContext* opCtx, BSONObjBuilder& b, const std::string& name);
virtual Status set(const BSONElement& newValueElement);
virtual Status setFromString(const std::string& str);
std::pair<double, WiredTigerKVEngine*> _data;
};
}
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