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https://issues.apache.org/jira/browse/FLINK-9538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16505797#comment-16505797
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ASF GitHub Bot commented on FLINK-9538:
---------------------------------------
Github user yanghua commented on a diff in the pull request:
https://github.com/apache/flink/pull/6134#discussion_r193976690
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/state/KeyedStateFunction.java
---
@@ -25,13 +25,13 @@
* <p>This functionality is only available through the
* {@code BroadcastConnectedStream.process(final
KeyedBroadcastProcessFunction function)}.
*/
-public abstract class KeyedStateFunction<K, S extends State> {
+public interface KeyedStateFunction<K, S extends State> {
--- End diff --
hi @dawidwys the Travis is green, that means the lambda is right. I think
there isn't necessary to have a extra test? I think changing from anonymous
implementation to lambda function can be treat as refactor.
> Make KeyedStateFunction an interface
> ------------------------------------
>
> Key: FLINK-9538
> URL: https://issues.apache.org/jira/browse/FLINK-9538
> Project: Flink
> Issue Type: Improvement
> Reporter: Dawid Wysakowicz
> Assignee: vinoyang
> Priority: Major
>
> I suggest to change the KeyedStateFunction from abstract class to interface
> (FunctionalInterface in particular) to enable passing lambdas.
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