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84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of Beast: https://github.com/vinniefalco/Beast
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Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef BEAST_INSIGHT_EVENT_H_INCLUDED
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#define BEAST_INSIGHT_EVENT_H_INCLUDED
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#include <chrono>
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#include <memory>
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#include "Base.h"
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#include "EventImpl.h"
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#include "../chrono/chrono_util.h"
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namespace beast {
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namespace insight {
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/** A metric for reporting event timing.
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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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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 : public Base
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{
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public:
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typedef EventImpl::value_type value_type;
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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 ()
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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> const& impl)
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: m_impl (impl)
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{ }
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/** Push an event notification. */
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template <class Rep, class Period>
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void notify (std::chrono::duration <Rep, Period> const& value) const
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{
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if (m_impl)
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m_impl->notify (ceil <value_type> (value));
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}
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std::shared_ptr <EventImpl> const& impl () const
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{
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return m_impl;
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}
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private:
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std::shared_ptr <EventImpl> m_impl;
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};
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}
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}
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#endif
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