| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COBALT_LOGGER_INTERNAL_METRICS_H_ |
| #define COBALT_LOGGER_INTERNAL_METRICS_H_ |
| |
| #include <memory> |
| #include <string> |
| |
| #include "logger/logger_interface.h" |
| |
| #include "logger/internal_metrics_config.cb.h" |
| |
| namespace cobalt { |
| namespace logger { |
| |
| // InternalMetrics defines the methods used for collecting cobalt-internal |
| // metrics. |
| class InternalMetrics { |
| public: |
| // LoggerCalled (cobalt_internal::metrics::logger_calls_made) is logged for |
| // every call to Logger along with which method was called. |
| virtual void LoggerCalled(LoggerCallsMadeEventCode event_code) = 0; |
| |
| virtual ~InternalMetrics() {} |
| }; |
| |
| // NoOpInternalMetrics is to be used when the LoggerInterface* provided to the |
| // Logger constructor is nullptr. It stubs out all of the calls in the |
| // InternalMetrics interface, allowing code to safely make these calls even if |
| // no LoggerInterface* was provided. |
| class NoOpInternalMetrics : public InternalMetrics { |
| void LoggerCalled(LoggerCallsMadeEventCode event_code) override {} |
| |
| ~NoOpInternalMetrics() override {} |
| }; |
| |
| // InternalMetricsImpl is the actual implementation of InternalMetrics. It is a |
| // wrapper around the (non nullptr) LoggerInterface* that was provided to the |
| // Logger constructor. |
| class InternalMetricsImpl : public InternalMetrics { |
| public: |
| explicit InternalMetricsImpl(LoggerInterface* logger); |
| |
| void LoggerCalled(LoggerCallsMadeEventCode event_code) override; |
| |
| ~InternalMetricsImpl() override {} |
| |
| private: |
| LoggerInterface* logger_; // not owned |
| }; |
| |
| } // namespace logger |
| } // namespace cobalt |
| |
| #endif // COBALT_LOGGER_INTERNAL_METRICS_H_ |