TimestampsAndWatermarks.WatermarkUpdateListener (Flink : Runtime 2.0-preview1 API)

All Known Implementing Classes:

SourceOperator

Enclosing interface:

TimestampsAndWatermarks<T>
```
@Internal
public static interface TimestampsAndWatermarks.WatermarkUpdateListener
```
Lets the owner/creator of the output know about latest emitted watermark.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`splitFinished(String splitId)`	Notifies that split has finished.
`void`	`updateCurrentEffectiveWatermark(long watermark)`	Update the effective watermark.
`void`	`updateCurrentSplitWatermark(String splitId, long watermark)`	Notifies about changes to per split watermarks.
`void`	`updateIdle(boolean isIdle)`	It should be called once the idle is changed.

- Method Detail
  - updateIdle
```
void updateIdle(boolean isIdle)
```
    It should be called once the idle is changed.
  - updateCurrentEffectiveWatermark
```
void updateCurrentEffectiveWatermark(long watermark)
```
    Update the effective watermark. If an output becomes idle, please call {@link this#updateIdle} instead of update the watermark to Long.MAX_VALUE. Because the output needs to distinguish between idle and real watermark.
  - updateCurrentSplitWatermark
```
void updateCurrentSplitWatermark(String splitId,
                                 long watermark)
```
    Notifies about changes to per split watermarks.
  - splitFinished
```
void splitFinished(String splitId)
```
    Notifies that split has finished.