[jira] [Created] (KAFKA-6161) Make configure() and close() empty by default in serde interfaces

["Evgeny Veretennikov (JIRA)" <ji...@apache.org>]

Evgeny Veretennikov created KAFKA-6161:
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             Summary: Make configure() and close() empty by default in serde interfaces
                 Key: KAFKA-6161
                 URL: https://issues.apache.org/jira/browse/KAFKA-6161
             Project: Kafka
          Issue Type: Improvement
          Components: clients
            Reporter: Evgeny Veretennikov
            Assignee: Evgeny Veretennikov
            Priority: Normal


{{Serializer}}, {{Deserializer}} and {{Serde}} interfaces have methods {{configure()}} and {{close()}}. Pretty often one want to leave these methods empty. For example, a lot of serializers inside {{org.apache.kafka.common.serialization}} package have these methods empty:

{code}
@Override
public void configure(Map<String, ?> configs, boolean isKey) {
    // nothing to do
}

@Override
public void close() {
    // nothing to do
}
{code}

Since we switched to source level 1.8 for javac, we can make these methods empty by default.

As another option, we may create new interfaces (like {{UnconfiguredSerializer}}), in which we will define these methods empty, but just making methods default seems more convenient.

As a side note, making methods default shouldn't be binary incompatible. So, seems like it's safe to make this change.



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