61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/*
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* KnobProtectiveGroups.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FDBSERVER_KNOBPROTECTIVEGROUPS_H
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#define FDBSERVER_KNOBPROTECTIVEGROUPS_H
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#include <array>
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#include <unordered_map>
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#include "fdbclient/IKnobCollection.h"
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// A list of knob key value pairs
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class KnobKeyValuePairs {
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public:
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using container_t = std::unordered_map<std::string, ParsedKnobValue>;
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private:
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// Here the knob value is directly stored, unlike KnobValue, for simplicity
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container_t knobs;
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public:
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// Sets a value for a given knob
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void set(const std::string& name, const ParsedKnobValue value);
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// Gets a list of knobs for given type
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const container_t& getKnobs() const;
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};
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// For knobs, temporarily change the values, the original values will be recovered
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class KnobProtectiveGroup {
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KnobKeyValuePairs overriddenKnobs;
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KnobKeyValuePairs originalKnobs;
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// Snapshots the current knob values base on those knob keys in overriddenKnobs
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void snapshotOriginalKnobs();
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void assignKnobs(const KnobKeyValuePairs& overrideKnobs);
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public:
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KnobProtectiveGroup(const KnobKeyValuePairs& overridenKnobs_);
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~KnobProtectiveGroup();
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};
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#endif // FDBSERVER_KNOBPROTECTIVEGROUPS_H
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