Contents

# Stats that are associated with each instrumented method. 
class ScoutRails::MetricStats
  attr_accessor :call_count
  attr_accessor :min_call_time
  attr_accessor :max_call_time
  attr_accessor :total_call_time
  attr_accessor :total_exclusive_time
  attr_accessor :sum_of_squares
  
  def initialize
    self.call_count = 0
    self.total_call_time = 0.0
    self.total_exclusive_time = 0.0
    self.min_call_time = 0.0
    self.max_call_time = 0.0
    self.sum_of_squares = 0.0
  end
  
  def update!(call_time,exclusive_time)
    self.min_call_time = call_time if self.call_count == 0 or call_time < min_call_time
    self.max_call_time = call_time if self.call_count == 0 or call_time > max_call_time   
    self.call_count +=1
    self.total_call_time += call_time
    self.total_exclusive_time += exclusive_time
    self.sum_of_squares += (call_time * call_time)
    self
  end
  
  # combines data from another MetricStats object
  def combine!(other)
    self.call_count += other.call_count
    self.total_call_time += other.total_call_time
    self.total_exclusive_time += other.total_exclusive_time
    self.min_call_time = other.min_call_time if other.min_call_time < self.min_call_time
    self.max_call_time = other.max_call_time if other.max_call_time > self.max_call_time
    self.sum_of_squares += other.sum_of_squares
    self
  end
  
  # To avoid conflicts with different JSON libaries handle JSON ourselves. 
  # Time-based metrics are converted to milliseconds from seconds.
  def to_json(*a)
     %Q[{"total_exclusive_time":#{total_exclusive_time*1000},"min_call_time":#{min_call_time*1000},"call_count":#{call_count},"sum_of_squares":#{sum_of_squares*1000},"total_call_time":#{total_call_time*1000},"max_call_time":#{max_call_time*1000}}]
  end
end # class MetricStats

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
scout_rails-0.0.3.pre	lib/scout_rails/metric_stats.rb
scout_rails-0.0.2	lib/scout_rails/metric_stats.rb
scout_rails-0.0.1	lib/scout_rails/metric_stats.rb