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#ifndef CERT_TRANS_MONITORING_COUNTER_H_
#define CERT_TRANS_MONITORING_COUNTER_H_
#include <gflags/gflags.h>
#include <memory>
#include <mutex>
#include <string>
#include "base/macros.h"
#include "monitoring/labelled_values.h"
#include "monitoring/metric.h"
namespace cert_trans {
// A metric which can only increase (e.g. total_requests_served).
template <class... LabelTypes>
class Counter : public Metric {
public:
static Counter<LabelTypes...>* New(
const std::string& name,
const typename NameType<LabelTypes>::name&... label_names,
const std::string& help);
void Increment(const LabelTypes&... labels);
void IncrementBy(const LabelTypes&... labels, double amount);
double Get(const LabelTypes&... labels) const;
std::map<std::vector<std::string>, Metric::TimestampedValue> CurrentValues()
const override;
private:
Counter(const std::string& name,
const typename NameType<LabelTypes>::name&... label_names,
const std::string& help);
LabelledValues<LabelTypes...> values_;
DISALLOW_COPY_AND_ASSIGN(Counter);
};
// static
template <class... LabelTypes>
Counter<LabelTypes...>* Counter<LabelTypes...>::New(
const std::string& name,
const typename NameType<LabelTypes>::name&... label_names,
const std::string& help) {
return new Counter(name, label_names..., help);
}
template <class... LabelTypes>
Counter<LabelTypes...>::Counter(
const std::string& name,
const typename NameType<LabelTypes>::name&... label_names,
const std::string& help)
: Metric(COUNTER, name, {label_names...}, help),
values_(name, label_names...) {
}
template <class... LabelTypes>
void Counter<LabelTypes...>::Increment(const LabelTypes&... labels) {
values_.Increment(labels...);
}
template <class... LabelTypes>
void Counter<LabelTypes...>::IncrementBy(const LabelTypes&... labels,
double amount) {
values_.IncrementBy(labels..., amount);
}
template <class... LabelTypes>
double Counter<LabelTypes...>::Get(const LabelTypes&... labels) const {
return values_.Get(labels...);
}
template <class... LabelTypes>
std::map<std::vector<std::string>, Metric::TimestampedValue>
Counter<LabelTypes...>::CurrentValues() const {
return values_.CurrentValues();
}
} // namespace cert_trans
#endif // CERT_TRANS_MONITORING_COUNTER_H_
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