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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] -- This message was sent by Atlassian Jira (v8.3.4#803005)