You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@flink.apache.org by "Aljoscha Krettek (JIRA)" <ji...@apache.org> on 2016/09/26 08:58:20 UTC
[jira] [Updated] (FLINK-3674) Add an interface for Time aware User
Functions
[ https://issues.apache.org/jira/browse/FLINK-3674?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aljoscha Krettek updated FLINK-3674:
------------------------------------
Summary: Add an interface for Time aware User Functions (was: Add an interface for Time aware User Function)
> Add an interface for Time aware User Functions
> ----------------------------------------------
>
> Key: FLINK-3674
> URL: https://issues.apache.org/jira/browse/FLINK-3674
> Project: Flink
> Issue Type: New Feature
> Components: Streaming
> Affects Versions: 1.0.0
> Reporter: Stephan Ewen
> Assignee: Aljoscha Krettek
>
> I suggest to add an interface that UDFs can implement, which will let them be notified upon watermark updates.
> Example usage:
> {code}
> public interface EventTimeFunction {
> void onWatermark(Watermark watermark);
> }
> public class MyMapper implements MapFunction<String, String>, EventTimeFunction {
> private long currentEventTime = Long.MIN_VALUE;
> public String map(String value) {
> return value + " @ " + currentEventTime;
> }
> public void onWatermark(Watermark watermark) {
> currentEventTime = watermark.getTimestamp();
> }
> }
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)