MonotonicClock (opentelemetry-sdk-common 0.13.0 API)

java.lang.Object
- io.opentelemetry.sdk.internal.MonotonicClock

All Implemented Interfaces:

Clock
```
@Immutable
public final class MonotonicClock
extends Object
implements Clock
```
This class provides a mechanism for calculating the epoch time using System.nanoTime() and a reference epoch timestamp.
This is needed because Java has millisecond granularity for epoch times and tracing events are recorded more often.
This clock needs to be re-created periodically in order to re-sync with the kernel clock, and it is not recommended to use only one instance for a very long period of time.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static MonotonicClock`	`create(Clock clock)`	Returns a `MonotonicClock`.
`long`	`nanoTime()`	Returns a time measurement with nanosecond precision that can only be used to calculate elapsed time.
`long`	`now()`	Returns the current epoch timestamp in nanos calculated using `System.nanoTime()` since the reference time read in the constructor.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - create
```
public static MonotonicClock create(Clock clock)
```
    Returns a MonotonicClock.
    
    Parameters:
    
    clock - the Clock to be used to read the current epoch time and nanoTime.
    
    Returns:
    
    a MonotonicClock.
  - now
```
public long now()
```
    Returns the current epoch timestamp in nanos calculated using System.nanoTime() since the reference time read in the constructor.
    
    Specified by:
    
    now in interface Clock
    
    Returns:
    
    the current epoch timestamp in nanos.
  - nanoTime
```
public long nanoTime()
```
    Description copied from interface: Clock
    
    Returns a time measurement with nanosecond precision that can only be used to calculate elapsed time.
    
    Specified by:
    
    nanoTime in interface Clock
    
    Returns:
    
    a time measurement with nanosecond precision that can only be used to calculate elapsed time.