Package org.apache.flink.api.common.eventtime

Class RecordTimestampAssigner<E>

java.lang.Object

org.apache.flink.api.common.eventtime.RecordTimestampAssigner<E>

All Implemented Interfaces:

TimestampAssigner<E>

@Public
public final class RecordTimestampAssigner<E>
extends Object
implements TimestampAssigner<E>

A TimestampAssigner that forwards the already-assigned timestamp. This is for use when records come out of a source with valid timestamps, for example from the Kafka Metadata.

Field Summary

Fields inherited from interface org.apache.flink.api.common.eventtime.TimestampAssigner

NO_TIMESTAMP

Constructor Summary

Constructors

Constructor	Description
RecordTimestampAssigner()

Method Summary

Modifier and Type	Method	Description
long	extractTimestamp(E element, long recordTimestamp)	Assigns a timestamp to an element, in milliseconds since the Epoch.

Methods inherited from class java.lang.Object

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

Constructor Detail

RecordTimestampAssigner

public RecordTimestampAssigner()

Method Detail

extractTimestamp

public long extractTimestamp(E element,
                             long recordTimestamp)

Description copied from interface: TimestampAssigner

Assigns a timestamp to an element, in milliseconds since the Epoch. This is independent of any particular time zone or calendar.

The method is passed the previously assigned timestamp of the element. That previous timestamp may have been assigned from a previous assigner. If the element did not carry a timestamp before, this value is TimestampAssigner.NO_TIMESTAMP (= Long.MIN_VALUE: -9223372036854775808L).

Specified by:

extractTimestamp in interface TimestampAssigner<E>

Parameters:

element - The element that the timestamp will be assigned to.

recordTimestamp - The current internal timestamp of the element, or a negative value, if no timestamp has been assigned yet.

Returns:

The new timestamp.