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Contents
require "cabin/namespace"
require "cabin/metric"
require "thread"
class Cabin::Metrics::Histogram
include Cabin::Metric
# A new Histogram.
public
def initialize
@lock = Mutex.new
@inspectables = [ :@total, :@min, :@max, :@count, :@mean ]
# Histogram should track many things, including:
# - percentiles (50, 75, 90, 95, 99?)
# - median
# - max
# - min
# - total sum
#
# Sliding values of all of these?
@total = 0
@min = nil
@max = nil
@count = 0
@mean = 0.0
end # def initialize
public
def record(value)
@lock.synchronize do
@count += 1
@total += value
if @min.nil? or value < @min
@min = value
end
if @max.nil? or value > @max
@max = value
end
@mean = @total / @count
# TODO(sissel): median
# TODO(sissel): percentiles
end
emit
end # def record
# This is a very poor way to access the metric data.
# TODO(sissel): Need to figure out a better interface.
public
def value
return @lock.synchronize { @count }
end # def value
public
def to_hash
return @lock.synchronize do
{
:count => @count,
:total => @total,
:min => @min,
:max => @max,
:mean => @mean,
}
end
end # def to_hash
end # class Cabin::Metrics::Histogram
Version data entries
24 entries across 22 versions & 6 rubygems