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65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
#pragma once
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#include <xrpl/beast/insight/EventImpl.h>
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#include <chrono>
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#include <memory>
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#include <utility>
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namespace beast::insight {
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/**
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* A metric for reporting event timing.
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*
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* An event is an operation that has an associated millisecond time, or
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* other integral value. Because events happen at a specific moment, the
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* metric only supports a push-style interface.
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*
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* This is a lightweight reference wrapper which is cheap to copy and assign.
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* When the last reference goes away, the metric is no longer collected.
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*/
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class Event final
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{
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public:
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using value_type = EventImpl::value_type;
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/**
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* Create a null metric.
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* A null metric reports no information.
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*/
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Event() = default;
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/**
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* Create the metric reference the specified implementation.
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* Normally this won't be called directly. Instead, call the appropriate
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* factory function in the Collector interface.
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* @see Collector.
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*/
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explicit Event(std::shared_ptr<EventImpl> impl) : impl_(std::move(impl))
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{
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}
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/**
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* Push an event notification.
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*/
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template <class Rep, class Period>
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void
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notify(std::chrono::duration<Rep, Period> const& value) const
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{
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using namespace std::chrono;
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if (impl_)
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impl_->notify(ceil<value_type>(value));
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}
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[[nodiscard]] std::shared_ptr<EventImpl> const&
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impl() const
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{
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return impl_;
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}
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private:
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std::shared_ptr<EventImpl> impl_;
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};
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} // namespace beast::insight
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