class PxxBuckets

Attributes

ary[R]
buckets[R]
total[R]

Public Class Methods

new(options) click to toggle source
# File lib/vpsb_client/datafiles/pxx_aggregator.rb, line 35
def initialize(options)
  i = 0
  @ary = [ 0 ]
  ranges = options.fetch(:ranges)
  ranges.keys.sort.each do |ceiling|
    while(i < ceiling)
      i += ranges[ceiling]
      i = i.round(2) if i.is_a?(Float) # float decimal errors
      @ary << i
    end
  end

  @buckets = {}
  @ary.each do |min|
    @buckets[min] = 0
  end

  @pxx_keys = options.fetch(:pxx_keys)
  @total = 0
end

Public Instance Methods

[](key) click to toggle source
# File lib/vpsb_client/datafiles/pxx_aggregator.rb, line 64
def [](key)
  value(key.to_f/100.0)
end
each_key(&block) click to toggle source
# File lib/vpsb_client/datafiles/pxx_aggregator.rb, line 60
def each_key(&block)
  keys.each(&block)
end
empty?() click to toggle source
# File lib/vpsb_client/datafiles/pxx_aggregator.rb, line 74
def empty?
  return total==0
end
find_bucket_key(n) click to toggle source
# File lib/vpsb_client/datafiles/pxx_aggregator.rb, line 88
def find_bucket_key(n)
  idx = (0...@ary.size).bsearch do |i|
    @ary[i] > n
  end
  idx ? idx - 1 : @ary.size - 1
end
increment(n) click to toggle source
# File lib/vpsb_client/datafiles/pxx_aggregator.rb, line 68
def increment(n)
  k = find_bucket_key(n)
  @buckets[@ary[k]] += 1
  @total += 1
end
keys() click to toggle source
# File lib/vpsb_client/datafiles/pxx_aggregator.rb, line 56
def keys
  @pxx_keys
end
value(percent) click to toggle source
# File lib/vpsb_client/datafiles/pxx_aggregator.rb, line 78
  def value(percent)
    target = @total.to_f * (1.0 - percent)
    sum = 0
    @buckets.keys.sort.reverse.each do |floor|
      sum += @buckets[floor]
#       puts "target=#{target} floor=#{floor} sum=#{sum}"
      return floor if sum >= target
    end
  end