[
https://issues.apache.org/jira/browse/FLINK-11817?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Michael Holler updated FLINK-11817:
-----------------------------------
Description:
{{WindowedStream.fold}} is deprecated, but it's still recommended in the
tutorial documentation:
[https://ci.apache.org/projects/flink/flink-docs-release-1.7/tutorials/datastream_api.html]
Specifically this sample:
{code:java}
DataStream<Tuple2<String, Long>> result = keyedEdits
.timeWindow(Time.seconds(5))
.fold(new Tuple2<>("", 0L), new FoldFunction<WikipediaEditEvent,
Tuple2<String, Long>>() {
@Override
public Tuple2<String, Long> fold(Tuple2<String, Long> acc,
WikipediaEditEvent event) {
acc.f0 = event.getUser();
acc.f1 += event.getByteDiff();
return acc;
}
});{code}
WindowedStream suggests using {{WindowedStream.aggregate(AggregationFunction)}}
instead, but as a beginner it's difficult to understand how to go about that.
Can someone who knows the right way to migrate this code please update the
corresponding documentation?
was:
{{WindowedStream.fold}} is a deprecated, but it's still recommended in the
tutorial documentation:
[https://ci.apache.org/projects/flink/flink-docs-release-1.7/tutorials/datastream_api.html]
Specifically this sample:
{code:java}
DataStream<Tuple2<String, Long>> result = keyedEdits
.timeWindow(Time.seconds(5))
.fold(new Tuple2<>("", 0L), new FoldFunction<WikipediaEditEvent,
Tuple2<String, Long>>() {
@Override
public Tuple2<String, Long> fold(Tuple2<String, Long> acc,
WikipediaEditEvent event) {
acc.f0 = event.getUser();
acc.f1 += event.getByteDiff();
return acc;
}
});{code}
WindowedStream suggests using {{WindowedStream.aggregate(AggregationFunction)}}
instead, but as a beginner it's difficult to understand how to go about that.
Can someone who knows the right way to migrate this code please update the
corresponding documentation?
> DataStream API Tutorial uses deprecated fold function
> -----------------------------------------------------
>
> Key: FLINK-11817
> URL: https://issues.apache.org/jira/browse/FLINK-11817
> Project: Flink
> Issue Type: Bug
> Components: Documentation
> Affects Versions: 1.7.2
> Reporter: Michael Holler
> Priority: Minor
>
> {{WindowedStream.fold}} is deprecated, but it's still recommended in the
> tutorial documentation:
> [https://ci.apache.org/projects/flink/flink-docs-release-1.7/tutorials/datastream_api.html]
> Specifically this sample:
> {code:java}
> DataStream<Tuple2<String, Long>> result = keyedEdits
> .timeWindow(Time.seconds(5))
> .fold(new Tuple2<>("", 0L), new FoldFunction<WikipediaEditEvent,
> Tuple2<String, Long>>() {
> @Override
> public Tuple2<String, Long> fold(Tuple2<String, Long> acc,
> WikipediaEditEvent event) {
> acc.f0 = event.getUser();
> acc.f1 += event.getByteDiff();
> return acc;
> }
> });{code}
> WindowedStream suggests using
> {{WindowedStream.aggregate(AggregationFunction)}} instead, but as a beginner
> it's difficult to understand how to go about that.
> Can someone who knows the right way to migrate this code please update the
> corresponding documentation?
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