71 lines
2.6 KiB
C++
71 lines
2.6 KiB
C++
/*
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* LocalConfiguration.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 2013-2018 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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#pragma once
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#include <string>
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#include "fdbclient/ConfigKnobs.h"
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#include "fdbclient/IKnobCollection.h"
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#include "fdbclient/PImpl.h"
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#include "fdbserver/ConfigBroadcastInterface.h"
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#include "fdbserver/Knobs.h"
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#include "flow/Arena.h"
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#include "flow/Knobs.h"
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FDB_DECLARE_BOOLEAN_PARAM(IsTest);
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/*
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* Each worker maintains a LocalConfiguration object used to update its knob collection.
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* When a worker starts, the following steps are executed:
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* - Apply manual knob updates
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* - Read the local configuration file (with "localconf" prefix)
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* - If the stored configuration path does not match the current configuration path, delete the local configuration
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* file
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* - Otherwise, apply knob updates from the local configuration file (without overriding manual knob overrides)
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* - Register with the broadcaster to receive new updates for the relevant configuration classes
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* - Persist these updates when received, and restart if necessary
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*/
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class LocalConfiguration : public ReferenceCounted<LocalConfiguration> {
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PImpl<class LocalConfigurationImpl> impl;
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public:
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LocalConfiguration(std::string const& dataFolder,
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std::string const& configPath,
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std::map<std::string, std::string> const& manualKnobOverrides,
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IsTest = IsTest::False);
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~LocalConfiguration();
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FlowKnobs const& getFlowKnobs() const;
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ClientKnobs const& getClientKnobs() const;
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ServerKnobs const& getServerKnobs() const;
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TestKnobs const& getTestKnobs() const;
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Future<Void> consume(ConfigBroadcastInterface const& broadcastInterface);
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UID getID() const;
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Version lastSeenVersion() const;
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ConfigClassSet configClassSet() const;
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Future<Void> initialize();
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public: // Testing
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Future<Void> addChanges(Standalone<VectorRef<VersionedConfigMutationRef>> versionedMutations,
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Version mostRecentVersion);
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void close();
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Future<Void> onClosed();
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};
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