WatermarkStrategy (Flink : Table : Common 2.1.0 API)

java.lang.Object
- org.apache.flink.table.sources.wmstrategies.WatermarkStrategy

All Implemented Interfaces:

Serializable, Descriptor

Direct Known Subclasses:

PreserveWatermarks
```
@PublicEvolving
public abstract class WatermarkStrategy
extends Object
implements Serializable, Descriptor
```
Provides a strategy to generate watermarks for a rowtime attribute.
A watermark strategy is either a PeriodicWatermarkAssigner or PunctuatedWatermarkAssigner.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

WatermarkStrategy()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Map<String,String>`	`toProperties()`	This method is a default implementation that uses java serialization and it is discouraged.

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

- Constructor Detail
  - WatermarkStrategy
```
public WatermarkStrategy()
```
- Method Detail
  - toProperties
```
public Map<String,String> toProperties()
```
    This method is a default implementation that uses java serialization and it is discouraged. All implementation should provide a more specific set of properties.
    
    Specified by:
    
    toProperties in interface Descriptor