RanJinh commented on code in PR #23000:
URL: https://github.com/apache/flink/pull/23000#discussion_r1268169556
##########
flink-core/src/main/java/org/apache/flink/api/common/functions/Function.java:
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@@ -27,4 +28,16 @@
* method) interfaces that can be implemented via Java 8 lambdas.
*/
@Public
-public interface Function extends java.io.Serializable {}
+public interface Function extends java.io.Serializable {
+ /** Returns true iff the operator can only emit records after inputs have
reached EOF. */
+ @Internal
+ default boolean isOutputEOF() {
Review Comment:
It's more reasonable to overwrite `OperatorAttribute` in an operator, now
you can see the new usage in
`StreamingJobGraphGeneratorTest#testOverwriteOperatorAttributesPartitionTypes`.
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