Package org.agrona.concurrent
Class HighResolutionClock
- java.lang.Object
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- org.agrona.concurrent.HighResolutionClock
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public class HighResolutionClock extends java.lang.Object
Clock that provides the number of time units since the 1 Jan 1970 UTC.This implementation may be replaced on some platforms for greater performance.
Note: The actual provided resolution may be a higher granularity than the possible precision. For example, on Java 8 many JVMs will only advance a millisecond per tick so when requesting micros or nanos then the returned time may be a multiple of milliseconds. Later JVMs tend to improve on this.
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Constructor Summary
Constructors Constructor Description HighResolutionClock()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static long
epochMicros()
The number of microseconds since the 1 Jan 1970 UTC.static long
epochMillis()
The number of milliseconds since the 1 Jan 1970 UTC.static long
epochNanos()
The number of nanoseconds since the 1 Jan 1970 UTC.
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Method Detail
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epochMillis
public static long epochMillis()
The number of milliseconds since the 1 Jan 1970 UTC.- Returns:
- the number of milliseconds since the 1 Jan 1970 UTC.
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epochMicros
public static long epochMicros()
The number of microseconds since the 1 Jan 1970 UTC.- Returns:
- the number of microseconds since the 1 Jan 1970 UTC.
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epochNanos
public static long epochNanos()
The number of nanoseconds since the 1 Jan 1970 UTC.Precision depends upon the JVM version used. Hotspot/OpenJDK 8 provides millisecond level precision, 11 provides microsecond or lower granularity.
- Returns:
- the number of nanoseconds since the 1 Jan 1970 UTC.
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