Package org.eclipse.jetty.util.statistic

Class RateStatistic

java.lang.Object
org.eclipse.jetty.util.statistic.RateStatistic
public class RateStatistic extends Object

Statistics on a time sequence rate.

Calculates the rate at which the record() method is called over the configured period, retaining also the total count and maximum rate achieved.

The implementation keeps a Deque of timestamps for all records for the last time period, so this method is not suitable for large rates unless a small time period is used.

  • Constructor Details

    • RateStatistic

      public RateStatistic(long period, TimeUnit units)

  • Method Details

    • getPeriod

      public long getPeriod()

    • getUnits

      public TimeUnit getUnits()

    • reset

      public void reset()
      Resets the statistics.

    • age

      protected void age(long period, TimeUnit units)

    • record

      public int record()
      Records a sample value.
      Returns:
      the number of records in the current period.

    • getRate

      public int getRate()
      Returns:
      the number of records in the current period

    • getMax

      public long getMax()
      Returns:
      the max number of samples per period.

    • getOldest

      public long getOldest(TimeUnit units)
      Parameters:
      units - the units of the return
      Returns:
      the age of the oldest sample in the requested units

    • getCount

      public long getCount()
      Returns:
      the number of samples recorded

    • dump

      public String dump()

    • dump

      public String dump(TimeUnit units)

    • toString

      public String toString()
      Overrides:
      toString in class Object