JingGe commented on a change in pull request #18397:
URL: https://github.com/apache/flink/pull/18397#discussion_r790939938
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File path:
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/connector/kafka/source/reader/deserializer/KafkaValueOnlyDeserializerWrapper.java
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@@ -36,10 +36,15 @@
/** A package private class to wrap {@link Deserializer}. */
class KafkaValueOnlyDeserializerWrapper<T> implements
KafkaRecordDeserializationSchema<T> {
+
private static final long serialVersionUID = 5409547407386004054L;
+
private static final Logger LOG =
LoggerFactory.getLogger(KafkaValueOnlyDeserializerWrapper.class);
+
private final Class<? extends Deserializer<T>> deserializerClass;
+ // always be false since this Deserializer is only used for value.
Review comment:
Code style consistency means in this case that developers, when they
come from `KafkaSerializerWrapper` will check the `isKey` at first to see if
`deserializer.configure(...)` has been used in
`KafkaValueOnlyDeserializerWrapper`. It is much easier to check it via instance
variable than digging into the code. If you would try to read both classes back
and forth, you would get the feeling.
It is not a big deal. I will change it back.
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