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https://issues.apache.org/jira/browse/KAFKA-4932?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dong Lin updated KAFKA-4932:
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Fix Version/s: 2.1.0
> Add UUID Serde
> --------------
>
> Key: KAFKA-4932
> URL: https://issues.apache.org/jira/browse/KAFKA-4932
> Project: Kafka
> Issue Type: Improvement
> Components: clients, streams
> Reporter: Jeff Klukas
> Assignee: Brandon Kirchner
> Priority: Minor
> Labels: needs-kip, newbie
> Fix For: 2.1.0
>
>
> I propose adding serializers and deserializers for the java.util.UUID class.
> I have many use cases where I want to set the key of a Kafka message to be a
> UUID. Currently, I need to turn UUIDs into strings or byte arrays and use
> their associated Serdes, but it would be more convenient to serialize and
> deserialize UUIDs directly.
> I'd propose that the serializer and deserializer use the 36-byte string
> representation, calling UUID.toString and UUID.fromString, and then using the
> existing StringSerializer / StringDeserializer to finish the job. We would
> also wrap these in a Serde and modify the streams Serdes class to include
> this in the list of supported types.
> Optionally, we could have the deserializer support a 16-byte representation
> and it would check the size of the input byte array to determine whether it's
> a binary or string representation of the UUID. It's not well defined whether
> the most significant bits or least significant go first, so this deserializer
> would have to support only one or the other.
> Similary, if the deserializer supported a 16-byte representation, there could
> be two variants of the serializer, a UUIDStringSerializer and a
> UUIDBytesSerializer.
> I would be willing to write this PR, but am looking for feedback about
> whether there are significant concerns here around ambiguity of what the byte
> representation of a UUID should be, or if there's desire to keep to list of
> built-in Serdes minimal such that a PR would be unlikely to be accepted.
> KIP Link:
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-206%3A+Add+support+for+UUID+serialization+and+deserialization
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