org.apache.flink.table.runtime.operators.wmassigners

类 BoundedOutOfOrderWatermarkGenerator

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.table.runtime.generated.WatermarkGenerator

org.apache.flink.table.runtime.operators.wmassigners.BoundedOutOfOrderWatermarkGenerator

所有已实现的接口:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction

public class BoundedOutOfOrderWatermarkGenerator
extends WatermarkGenerator

A watermark generator for rowtime attributes which are out-of-order by a bounded time interval.

Emits watermarks which are the observed timestamp minus the specified delay.

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
BoundedOutOfOrderWatermarkGenerator(int rowtimeIndex, long delay)

方法概要

限定符和类型	方法和说明
Long	currentWatermark(org.apache.flink.table.data.RowData row) Returns the watermark for the current row or null if no watermark should be generated.

从类继承的方法 org.apache.flink.api.common.functions.AbstractRichFunction

close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

BoundedOutOfOrderWatermarkGenerator

public BoundedOutOfOrderWatermarkGenerator(int rowtimeIndex,
                                           long delay)

参数:

rowtimeIndex - the field index of rowtime attribute, the value of rowtime should never be null.

delay - The delay by which watermarks are behind the observed timestamp.

方法详细资料

currentWatermark

@Nullable
public Long currentWatermark(org.apache.flink.table.data.RowData row)

从类复制的说明: WatermarkGenerator

Returns the watermark for the current row or null if no watermark should be generated.

指定者:

currentWatermark 在类中 WatermarkGenerator

参数:

row - The current row.

返回:

The watermark for this row or null if no watermark should be generated.