mirror of
https://github.com/kidfromjupiter/nearby.git
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97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
// Copyright 2023 Google LLC
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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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// https://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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#ifndef THIRD_PARTY_NEARBY_INTERNAL_FLAGS_NEARBY_FLAGS_H_
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#define THIRD_PARTY_NEARBY_INTERNAL_FLAGS_NEARBY_FLAGS_H_
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#include <cstdint>
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#include <string>
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#include "absl/base/thread_annotations.h"
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#include "absl/container/flat_hash_map.h"
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#include "absl/strings/string_view.h"
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#include "absl/synchronization/mutex.h"
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#include "internal/flags/default_flag_reader.h"
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#include "internal/flags/flag.h"
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#include "internal/flags/flag_reader.h"
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namespace nearby {
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class NearbyFlags final : public nearby::flags::FlagReader {
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public:
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~NearbyFlags() override = default;
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static NearbyFlags& GetInstance();
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// Reads flag with boolean value.
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bool GetBoolFlag(const flags::Flag<bool>& flag) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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// Reads flag with int64_t value.
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int64_t GetInt64Flag(const flags::Flag<int64_t>& flag) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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// Reads flag with double value.
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double GetDoubleFlag(const flags::Flag<double>& flag) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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// Reads flag with string value.
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std::string GetStringFlag(const flags::Flag<absl::string_view>& flag) override
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ABSL_LOCKS_EXCLUDED(mutex_);
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void SetFlagReader(flags::FlagReader& flag_reader)
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ABSL_LOCKS_EXCLUDED(mutex_);
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// Override the default value of the flags. The major purpose of the method is
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// for test.
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void OverrideBoolFlagValue(const flags::Flag<bool>& flag, bool new_value)
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ABSL_LOCKS_EXCLUDED(mutex_);
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void OverrideInt64FlagValue(const flags::Flag<int64_t>& flag,
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int64_t new_value) ABSL_LOCKS_EXCLUDED(mutex_);
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void OverrideDoubleFlagValue(const flags::Flag<double>& flag,
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double new_value) ABSL_LOCKS_EXCLUDED(mutex_);
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void OverrideStringFlagValue(const flags::Flag<absl::string_view>& flag,
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absl::string_view new_value)
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ABSL_LOCKS_EXCLUDED(mutex_);
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// Reset all overridden values.
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void ResetOverridedValues() ABSL_LOCKS_EXCLUDED(mutex_);
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private:
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NearbyFlags() = default;
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flags::FlagReader* flag_reader_ = nullptr;
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flags::DefaultFlagReader default_flag_reader_;
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mutable absl::Mutex mutex_;
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absl::flat_hash_map<std::string, bool> overrided_bool_flag_values_
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ABSL_GUARDED_BY(mutex_);
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absl::flat_hash_map<std::string, int64_t> overrided_int64_flag_values_
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ABSL_GUARDED_BY(mutex_);
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absl::flat_hash_map<std::string, double> overrided_double_flag_values_
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ABSL_GUARDED_BY(mutex_);
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absl::flat_hash_map<std::string, std::string> overrided_string_flag_values_
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ABSL_GUARDED_BY(mutex_);
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};
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} // namespace nearby
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#endif // THIRD_PARTY_NEARBY_INTERNAL_FLAGS_NEARBY_FLAGS_H_
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