Package io.deephaven.base.stats

Class State

java.lang.Object
io.deephaven.base.stats.Value
io.deephaven.base.stats.State
Direct Known Subclasses:
HistogramState
public class State extends Value
A statistic where each value represents a snapshot of the state of the system, and thus the sum of the values does not have any meaning. Examples include queue size and latency. If the sum of the values does have a useful interpretation, use Counter instead.
  • Value.sample(long) takes a sample, recording a single value. This is the most common usage. (Value.increment(long) does exactly the same thing but is a poor verb to use with a State.)
  • sampleFromIncrement(long) takes a sample, recording a value that is the last sample plus the given increment. (If no samples have yet been taken, the "last" sample is assumed to be 0). For example, this can be used to track a queue's size by calling it every time an item is added or removed.

  • Field Details

  • Constructor Details

    • State

      public State(long now)

  • Method Details

    • sampleFromIncrement

      public void sampleFromIncrement(long n)

    • getTypeTag

      public char getTypeTag()
      Specified by:
      getTypeTag in class Value