org.apache.solr.util.stats

## Class Clock

- java.lang.Object
- - org.apache.solr.util.stats.Clock

- Direct Known Subclasses:
    Clock.CpuTimeClock, Clock.UserTimeClock

      public abstract class Clock
      extends Object

  An abstraction for how time passes. It is passed to `Timer` to track timing.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `Clock.CpuTimeClock` A clock implementation which returns the current thread's CPU time.
    `static class` | `Clock.UserTimeClock` A clock implementation which returns the current time in epoch nanoseconds.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `Clock()`

  - ### Method Summary

    All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static Clock` | `defaultClock()` The default clock to use.
    `abstract long` | `getTick()` Returns the current time tick.
    `long` | `getTime()` Returns the current time in milliseconds.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### Clock

          public Clock()

  - ### Method Detail

    - #### getTick

          public abstract long getTick()

      Returns the current time tick.
      Returns:
        time tick in nanoseconds

    - #### getTime

          public long getTime()

      Returns the current time in milliseconds.
      Returns:
        time in milliseconds

    - #### defaultClock

          public static Clock defaultClock()

      The default clock to use.
      Returns:
        the default `Clock` instance
      See Also:
        `Clock.UserTimeClock`

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