net_instaweb::CountHistogram Class Reference

Trivial implementation. But Count() returns a meaningful value. More...

#include "statistics.h"

Inheritance diagram for net_instaweb::CountHistogram:

Public Member Functions
	CountHistogram (AbstractMutex *mutex)
	Takes ownership of mutex.
virtual void	Add (double value)
	Record a value in its bucket.
virtual void	Clear ()
	Throw away all data.
virtual int	NumBuckets ()
	Returns number of buckets the histogram actually has.
virtual void	EnableNegativeBuckets ()
	Allow histogram have negative values.
virtual void	SetMinValue (double value)
	Set the minimum value allowed in histogram.
virtual void	SetMaxValue (double value)
virtual void	SetSuggestedNumBuckets (int i)
virtual GoogleString	GetName () const
Public Member Functions inherited from net_instaweb::Histogram
bool	Empty ()
	True if the histogram is empty.
virtual void	Render (int index, Writer *writer, MessageHandler *handler)
double	Average ()
	Returns average of the values added.
double	Percentile (const double perc)
double	StandardDeviation ()
double	Count ()
double	Maximum ()
double	Minimum ()
double	Median ()
GoogleString	HtmlTableRow (const GoogleString &title, int index)
virtual double	BucketLimit (int index)
	Upper bound of a bucket.

Protected Member Functions
virtual AbstractMutex *	lock () LOCK_RETURNED(mutex_)
virtual double	AverageInternal ()
	Note that these *Internal interfaces require the mutex to be held.
virtual double	PercentileInternal (const double perc)
virtual double	StandardDeviationInternal ()
virtual double	CountInternal () EXCLUSIVE_LOCKS_REQUIRED(lock())
virtual double	MaximumInternal ()
virtual double	MinimumInternal ()
virtual double	BucketStart (int index)
virtual double	BucketCount (int index)
	Value of a bucket.
Protected Member Functions inherited from net_instaweb::Histogram
void	WriteRawHistogramData (Writer *writer, MessageHandler *handler)

Detailed Description

Trivial implementation. But Count() returns a meaningful value.

Member Function Documentation

virtual double net_instaweb::CountHistogram::BucketStart ( int  index )

inlineprotectedvirtual

Lower bound of a bucket. If index == NumBuckets() + 1, returns the upper bound of the histogram. DCHECK if index is in the range of [0, NumBuckets()+1].

Implements net_instaweb::Histogram.

virtual void net_instaweb::CountHistogram::SetMaxValue ( double  value )

inlinevirtual

Set the value upper-bound of a histogram, the value range in histogram is [MinValue, MaxValue) or [-MaxValue, MaxValue) if enabled negative buckets.

Implements net_instaweb::Histogram.

virtual void net_instaweb::CountHistogram::SetSuggestedNumBuckets ( int  i )

inlinevirtual

Set the suggested number of buckets for the histogram. The implementation may chose to use a somewhat different number.

Implements net_instaweb::Histogram.

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The documentation for this class was generated from the following file:

• pagespeed/kernel/base/statistics.h