Class StatisticsAccumulator

java.lang.Object
org.glassfish.pfl.tf.timer.spi.StatisticsAccumulator

public class StatisticsAccumulator extends Object

  • Field Details

    • max

      private double max
    • min

      private double min
    • sampleSum

      double sampleSum
    • sampleSquareSum

      double sampleSquareSum
    • sampleCount

      private long sampleCount
    • unit

      private String unit
    • stats

      private Statistics stats
  • Constructor Details

    • StatisticsAccumulator

      public StatisticsAccumulator(String unit)
      Construct the Statistics Accumulator by providing the unit as a String. The examples of units are "Hours", "Minutes", "Seconds", "MilliSeconds", "Micro Seconds" etc.,

      Parameters:
      unit - a String representing the units for the samples collected
  • Method Details

    • unit

      public String unit()
    • count

      public long count()
    • min

      public double min()
    • max

      public double max()
    • average

      public double average()
    • standardDeviation

      public double standardDeviation()
    • sample

      public void sample(double value)
    • getStats

      public Statistics getStats()
    • augment

      public void augment(StatisticsAccumulator acc)
    • getValue

      public String getValue()
      Computes the Standard Statistic Results based on the samples collected so far and provides the complete value as a formatted String
    • toString

      public String toString()
      Users can extend StatisticsAccumulator to provide the complete Stats in the format they prefer, if the default format doesn't suffice.
      Overrides:
      toString in class Object
    • clearState

      public void clearState()
      Clears the samples and starts fresh on new samples.
    • unitTestValidate

      public void unitTestValidate(String expectedUnit, double expectedMin, double expectedMax, long expectedSampleCount, double expectedAverage, double expectedStandardDeviation)
      This is an internal API to test StatisticsAccumulator...