09c45c4440
Previously, we did not have a license request latency metric. This is a notable limitation in our metrics. This adds a metric that captures the timing between a GenerateKeyRequest and an AddKey operation. Bug: 72994956 Test: New unit tests. Google Play Change-Id: If99c187399c02f9b5d4c355732af7588bbbefb11
100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
// Copyright 2017 Google Inc. All Rights Reserved.
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//
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// This file contains the declarations for the Metric class and related
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// types.
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#ifndef WVCDM_METRICS_VALUE_METRIC_H_
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#define WVCDM_METRICS_VALUE_METRIC_H_
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#include <stdint.h>
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#include <string>
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#include "metrics.pb.h"
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namespace wvcdm {
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namespace metrics {
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// Internal namespace for helper methods.
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namespace impl {
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// Helper function for setting a value in the proto.
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template <typename T>
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void SetValue(drm_metrics::ValueMetric *value_proto, const T &value);
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} // namespace impl
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// The ValueMetric class supports storing a single, overwritable value or an
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// error code. This class can be serialized to a drm_metrics::ValueMetric proto.
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// If an error or value was not provided, this metric will serialize to nullptr.
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//
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// Example Usage:
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// Metric<string> cdm_version().Record("a.b.c.d");
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// std::unique_ptr<drm_metrics::ValueMetric> mymetric(
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// cdm_version.ToProto());
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//
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// Example Error Usage:
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//
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// Metric<string> cdm_version().SetError(error_code);
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// std::unique_ptr<drm_metrics::ValueMetric> mymetric(
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// cdm_version.ToProto());
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//
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template <typename T>
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class ValueMetric {
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public:
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// Constructs a metric with the given metric name.
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explicit ValueMetric()
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: error_code_(0), has_error_(false), has_value_(false) {}
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// Record the value of the metric.
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void Record(const T &value) {
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value_ = value;
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has_value_ = true;
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has_error_ = false;
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}
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// Set the error code if an error was encountered.
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void SetError(int error_code) {
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error_code_ = error_code;
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has_value_ = false;
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has_error_ = true;
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}
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bool HasValue() const { return has_value_; }
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const T &GetValue() const { return value_; }
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bool HasError() const { return has_error_; }
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int GetError() const { return error_code_; }
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// Clears the indicators that the metric or error was set.
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void Clear() {
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has_value_ = false;
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has_error_ = false;
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}
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// Returns a new ValueMetric proto containing the metric value or the
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// error code. If neither the error or value are set, it returns nullptr.
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drm_metrics::ValueMetric *ToProto() const {
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if (has_error_) {
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drm_metrics::ValueMetric *value_proto = new drm_metrics::ValueMetric;
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value_proto->set_error_code(error_code_);
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return value_proto;
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} else if (has_value_) {
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drm_metrics::ValueMetric *value_proto = new drm_metrics::ValueMetric;
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impl::SetValue(value_proto, value_);
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return value_proto;
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}
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return NULL;
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}
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private:
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T value_;
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int error_code_;
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bool has_error_;
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bool has_value_;
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};
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} // namespace metrics
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} // namespace wvcdm
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#endif // WVCDM_METRICS_VALUE_METRIC_H_
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