ruanhang1993 commented on code in PR #76:
URL:
https://github.com/apache/flink-connector-kafka/pull/76#discussion_r1469304314
##########
flink-connector-kafka/src/main/java/org/apache/flink/connector/kafka/source/KafkaSourceBuilder.java:
##########
@@ -350,6 +352,26 @@ public KafkaSourceBuilder<OUT> setValueOnlyDeserializer(
return this;
}
+ /**
+ * Sets the optional {@link RecordEvaluator eofRecordEvaluator} for
KafkaSource.
+ *
+ * <p>When the evaluator is specified, it is invoked for each
de-serialized record to determine
+ * whether the corresponding split has reached end of stream. If a record
is matched by the
+ * evaluator, the source would not emit this record as well as the
following records in the same
+ * split.
+ *
+ * <p>Note that the evaluator works jointly with the stopping offsets
specified by the {@link
+ * #setBounded(OffsetsInitializer)} or the {@link
#setUnbounded(OffsetsInitializer)}. The source
+ * stops consuming from a split when any of these conditions is met.
+ *
+ * @param eofRecordEvaluator a {@link RecordEvaluator recordEvaluator}
+ * @return this KafkaSourceBuilder.
+ */
+ public KafkaSourceBuilder<OUT> setEofRecordEvaluator(RecordEvaluator<OUT>
eofRecordEvaluator) {
Review Comment:
Hi, @mas-chen .
I read some parts about the `stoppingOffsetsInitializer`. Actually the
`eofRecordEvaluator` does the same job as `stoppingOffsetsInitializer`. We want
to use both `eofRecordEvaluator` and `stoppingOffsetsInitializer` to decide
when to stop reading and support to use them in one same source together.
But I find the method `KafkaSourceBuilder<OUT>
setUnbounded(OffsetsInitializer stoppingOffsetsInitializer)` in builder, which
supports to set a `stoppingOffsetsInitializer` in an unbounded source. I want
to keep the same behavior as `stoppingOffsetsInitializer` and do not add the
limitation for `eofRecordEvaluator`. What do you think?
Looking forward to your option.
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