ksqlDB UDFs and UDAFs Made Easy

Confluent Platform 5.3.0 introduces the ksqlDB UDF / UDAF Quickstart Maven archetype for bootstrapping custom ksqlDB functions. This archetype simplifies the process of building and deploying user-defined functions (UDFs) and user-defined aggregate functions (UDAFs). It also allows developers to convert the generated Maven project to a Gradle project with a simple command, catering to those who prefer using Gradle over Maven. The tutorial guides users through setting up the archetype, generating a new UDF/UDAF project, and deploying custom ksqlDB functions to a ksqlDB server. It also covers unit testing for both UDFs and UDAFs.