WatermarkMonotonicInterval (Nuxeo 2021.64.6 API Documentation)

java.lang.Object
- org.nuxeo.lib.stream.computation.internals.WatermarkMonotonicInterval

```
public class WatermarkMonotonicInterval
extends Object
```
Keep track of minimum and maximum watermark level. On checkpoint move the low watermark to the previous maximum mark.

Since:

9.3

Field Summary

Fields
Modifier and Type Field Description

protected Watermark high

protected Watermark low

protected Watermark lowest

Constructor Summary

Constructors
Constructor Description

WatermarkMonotonicInterval()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`checkpoint()`	Move the low watermark to the highest mark.
`Watermark`	`getHigh()`
`Watermark`	`getLow()`	Returns the low mark.
`boolean`	`isDone(long timestamp)`
`long`	`mark(long watermarkValue)`	Take in account the watermark.
`long`	`mark(Watermark watermark)`	Take in account the watermark.
`String`	`toString()`

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

- Field Detail
  - low
```
protected volatile Watermark low
```
  - lowest
```
protected Watermark lowest
```
  - high
```
protected Watermark high
```
- Constructor Detail
  - WatermarkMonotonicInterval
```
public WatermarkMonotonicInterval()
```
- Method Detail
  - mark
```
public long mark(long watermarkValue)
```
    Take in account the watermark.
    
    Implementation Note:
    
    Not thread safe.
  - mark
```
public long mark(Watermark watermark)
```
    Take in account the watermark.
    
    Implementation Note:
    
    Not thread safe.
  - checkpoint
```
public long checkpoint()
```
    Move the low watermark to the highest mark. Returns the low watermark that should be monotonic (the value returned here never decrease).
    
    Implementation Note:
    
    Not thread safe.
  - isDone
```
public boolean isDone(long timestamp)
```
  - getLow
```
public Watermark getLow()
```
    Returns the low mark. The value can decrease but not under the last checkpoint value.
    
    Implementation Note:
    
    Thread safe usage.
  - getHigh
```
public Watermark getHigh()
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object