davidradl commented on code in PR #26419:
URL: https://github.com/apache/flink/pull/26419#discussion_r2032818041
##########
flink-streaming-java/src/test/java/org/apache/flink/streaming/api/DataStreamTest.java:
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@@ -934,6 +936,47 @@ public void onTimer(long timestamp, OnTimerContext ctx,
Collector<Integer> out)
assertThat(getOperatorForDataStream(processed)).isInstanceOf(KeyedProcessOperator.class);
}
+ /**
+ * Verify that a {@link KeyedStream#process(KeyedProcessFunction)} call is
correctly translated
+ * to an async operator.
+ */
+ @Test
+ void testAsyncKeyedStreamKeyedProcessTranslation() {
+ StreamExecutionEnvironment env =
StreamExecutionEnvironment.getExecutionEnvironment();
+ DataStreamSource<Long> src = env.fromSequence(0, 0);
+
+ KeyedProcessFunction<Long, Long, Integer> keyedProcessFunction =
+ new KeyedProcessFunction<Long, Long, Integer>() {
+ private static final long serialVersionUID = 1L;
+
+ @Override
+ public void processElement(Long value, Context ctx,
Collector<Integer> out)
+ throws Exception {
+ // Do nothing
Review Comment:
nit: is is worth setting a flag when we come into the processElement, so we
can check it has run later?
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