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+// Copyright 2023 Huawei Cloud Computing Technology Co., Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef INCLUDED_SRC_BUILDTOOL_SERVE_API_PROGRESS_REPORTING_STATISTICS_HPP
+#define INCLUDED_SRC_BUILDTOOL_SERVE_API_PROGRESS_REPORTING_STATISTICS_HPP
+
+#include <atomic>
+
+class ServeServiceStatistics {
+ public:
+ [[nodiscard]] static auto Instance() noexcept -> ServeServiceStatistics& {
+ static ServeServiceStatistics instance{};
+ return instance;
+ }
+
+ void Reset() noexcept {
+ num_cache_hits_ = 0;
+ num_dispatched_ = 0;
+ num_served_ = 0;
+ }
+ void IncrementCacheHitsCounter() noexcept { ++num_cache_hits_; }
+ void IncrementDispatchedCounter() noexcept { ++num_dispatched_; }
+ void IncrementServedCounter() noexcept { ++num_served_; }
+
+ [[nodiscard]] auto CacheHitsCounter() const noexcept -> int {
+ return num_cache_hits_;
+ }
+ [[nodiscard]] auto DispatchedCounter() const noexcept -> int {
+ return num_dispatched_;
+ }
+ [[nodiscard]] auto ServedCounter() const noexcept -> int {
+ return num_served_;
+ }
+
+ private:
+ // locally cached export targets
+ std::atomic<int> num_cache_hits_{};
+ // export targets for which we have queried just serve
+ std::atomic<int> num_dispatched_{};
+ // export targets for which just serve responded
+ std::atomic<int> num_served_{};
+};
+
+#endif // INCLUDED_SRC_BUILDTOOL_SERVE_API_PROGRESS_REPORTING_STATISTICS_HPP