org.apache.flink.table.watermark

Enum WatermarkEmitStrategy

java.lang.Object

java.lang.Enum<WatermarkEmitStrategy>

org.apache.flink.table.watermark.WatermarkEmitStrategy

All Implemented Interfaces:

Serializable, Comparable<WatermarkEmitStrategy>

@PublicEvolving
public enum WatermarkEmitStrategy
extends Enum<WatermarkEmitStrategy>

The strategy for emitting watermark.

Enum Constant Summary

Enum Constants

Enum Constant and Description
ON_EVENT Emit watermark for every event.
ON_PERIODIC Emit watermark periodically.

Method Summary

Modifier and Type	Method and Description
String	getAlias()
boolean	isOnEvent()
boolean	isOnPeriodic()
String	toString()
static WatermarkEmitStrategy	valueOf(String name) Returns the enum constant of this type with the specified name.
static WatermarkEmitStrategy[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

ON_EVENT

public static final WatermarkEmitStrategy ON_EVENT

Emit watermark for every event.

ON_PERIODIC

public static final WatermarkEmitStrategy ON_PERIODIC

Emit watermark periodically. the period is configured by PipelineOptions.AUTO_WATERMARK_INTERVAL

Method Detail

values

public static WatermarkEmitStrategy[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (WatermarkEmitStrategy c : WatermarkEmitStrategy.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static WatermarkEmitStrategy valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getAlias

public String getAlias()

isOnEvent

public boolean isOnEvent()

isOnPeriodic

public boolean isOnPeriodic()

toString

public String toString()

Overrides:

toString in class Enum<WatermarkEmitStrategy>