SystemClock (Flink : Core 2.2.0 API)

java.lang.Object
- org.apache.flink.util.clock.Clock
- - org.apache.flink.util.clock.SystemClock

All Implemented Interfaces:

RelativeClock
```
@PublicEvolving
public final class SystemClock
extends Clock
```
A clock that returns the time of the system / process.
This clock uses System.currentTimeMillis() for absolute time and System.nanoTime() for relative time.
This SystemClock exists as a singleton instance.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`absoluteTimeMillis()`	Gets the current absolute time, in milliseconds.
`static SystemClock`	`getInstance()`
`long`	`relativeTimeMillis()`	Gets the current relative time, in milliseconds.
`long`	`relativeTimeNanos()`	Gets the current relative time, in nanoseconds.

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

- Method Detail
  - getInstance
```
public static SystemClock getInstance()
```
  - absoluteTimeMillis
```
public long absoluteTimeMillis()
```
    Description copied from class: Clock
    
    Gets the current absolute time, in milliseconds.
    
    Specified by:
    
    absoluteTimeMillis in class Clock
  - relativeTimeMillis
```
public long relativeTimeMillis()
```
    Description copied from class: Clock
    
    Gets the current relative time, in milliseconds.
    
    Specified by:
    
    relativeTimeMillis in interface RelativeClock
    
    Specified by:
    
    relativeTimeMillis in class Clock
  - relativeTimeNanos
```
public long relativeTimeNanos()
```
    Description copied from class: Clock
    
    Gets the current relative time, in nanoseconds.
    
    Specified by:
    
    relativeTimeNanos in interface RelativeClock
    
    Specified by:
    
    relativeTimeNanos in class Clock