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86 lines
2.0 KiB
C++
86 lines
2.0 KiB
C++
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. 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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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#pragma once
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#include <list>
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#include <mutex>
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#include <set>
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include "value/ValueType.h"
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namespace milvus {
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class ValueObserver {
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public:
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virtual ~ValueObserver() = default;
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virtual void
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ValueUpdate(const std::string& name) = 0;
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};
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class BaseValueMgr {
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protected:
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BaseValueMgr() = default;
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public:
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// Shared pointer should not be used here
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void
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Attach(const std::string& name, ValueObserver* observer);
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void
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Detach(const std::string& name, ValueObserver* observer);
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protected:
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virtual void
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Notify(const std::string& name);
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private:
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std::unordered_map<std::string, std::list<ValueObserver*>> observers_;
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std::mutex observer_mutex_;
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};
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class ValueMgr : public BaseValueMgr {
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public:
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explicit ValueMgr(std::unordered_map<std::string, BaseValuePtr> init_list) : value_list_(std::move(init_list)) {
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}
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ValueMgr(const ValueMgr&) = delete;
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ValueMgr&
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operator=(const ValueMgr&) = delete;
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ValueMgr(ValueMgr&&) = delete;
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ValueMgr&
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operator=(ValueMgr&&) = delete;
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public:
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void
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Init();
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virtual void
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Set(const std::string& name, const std::string& value, bool update) = 0;
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virtual std::string
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Get(const std::string& name) const = 0;
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std::string
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Dump() const;
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std::string
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JsonDump() const;
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protected:
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const std::unordered_map<std::string, BaseValuePtr> value_list_;
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};
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} // namespace milvus
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