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https://issues.apache.org/jira/browse/KAFKA-8326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniyar Yeralin updated KAFKA-8326:
-----------------------------------
Description:
_This ticket proposes adding new {color:#4c9aff}ListSerializer{color} and
{color:#4c9aff}ListDeserializer{color} classes as well as support for the new
classes into the Serdes class. This will allow using List Serde of type_
{color:#4c9aff}_<L extends List<T>, T>_{color} _directly from Consumers,
Producers and Streams._
_{color:#4c9aff}List<L>{color} serialization and deserialization will be done
through repeatedly calling a serializer/deserializer for each entry provided by
passed generic {color:#4c9aff}T{color}'s Serde. For example, if you want to
create List of Strings serde, then serializer/deserializer of StringSerde will
be used to serialize/deserialize each entry in
{color:#4c9aff}List<String>{color}._
I believe there are many use cases where List Serde could be used. Ex.
[https://stackoverflow.com/questions/41427174/aggregate-java-objects-in-a-list-with-kafka-streams-dsl-windows],
[https://stackoverflow.com/questions/46365884/issue-with-arraylist-serde-in-kafka-streams-api]
For instance, aggregate grouped (by key) values together in a list to do other
subsequent operations on the collection.
KIP Link:
[https://cwiki.apache.org/confluence/display/KAFKA/KIP-466%3A+Add+support+for+List%3CT%3E+serialization+and+deserialization]
was:
_This ticket proposes adding new ListSerializer and ListDeserializer classes as
well as support for the new classes into the Serdes class. This will allow
using List Serde of type T directly from Consumers, Producers and Streams._
_List<T> serialization and deserialization will be done through repeatedly
calling a serializer/deserializer for each entry provided by passed generic T's
Serde. For example, if you want to create List of Strings serde, then
serializer/deserializer of StringSerde will be used to serialize/deserialize
each entry in `List<String>`._
I believe there are many use cases where List Serde could be used. Ex.
[https://stackoverflow.com/questions/41427174/aggregate-java-objects-in-a-list-with-kafka-streams-dsl-windows],
[https://stackoverflow.com/questions/46365884/issue-with-arraylist-serde-in-kafka-streams-api]
For instance, aggregate grouped (by key) values together in a list to do other
subsequent operations on the collection.
KIP Link:
[https://cwiki.apache.org/confluence/display/KAFKA/KIP-466%3A+Add+support+for+List%3CT%3E+serialization+and+deserialization]
> Add List<T> Serde
> -----------------
>
> Key: KAFKA-8326
> URL: https://issues.apache.org/jira/browse/KAFKA-8326
> Project: Kafka
> Issue Type: Improvement
> Components: clients, streams
> Reporter: Daniyar Yeralin
> Assignee: Daniyar Yeralin
> Priority: Minor
> Labels: kip
>
> _This ticket proposes adding new {color:#4c9aff}ListSerializer{color} and
> {color:#4c9aff}ListDeserializer{color} classes as well as support for the new
> classes into the Serdes class. This will allow using List Serde of type_
> {color:#4c9aff}_<L extends List<T>, T>_{color} _directly from Consumers,
> Producers and Streams._
> _{color:#4c9aff}List<L>{color} serialization and deserialization will be done
> through repeatedly calling a serializer/deserializer for each entry provided
> by passed generic {color:#4c9aff}T{color}'s Serde. For example, if you want
> to create List of Strings serde, then serializer/deserializer of StringSerde
> will be used to serialize/deserialize each entry in
> {color:#4c9aff}List<String>{color}._
> I believe there are many use cases where List Serde could be used. Ex.
> [https://stackoverflow.com/questions/41427174/aggregate-java-objects-in-a-list-with-kafka-streams-dsl-windows],
>
> [https://stackoverflow.com/questions/46365884/issue-with-arraylist-serde-in-kafka-streams-api]
> For instance, aggregate grouped (by key) values together in a list to do
> other subsequent operations on the collection.
> KIP Link:
> [https://cwiki.apache.org/confluence/display/KAFKA/KIP-466%3A+Add+support+for+List%3CT%3E+serialization+and+deserialization]
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