Kafka Schema Evolution With Java Spring Boot and Protobuf | Object Partners
Summary
An actual app could persist to a database, or write to a KTable and later join the message to comments posting a large canonical model to a different topic. Note: I have included the generated Java files from the Protobuf compiler, but you would normally have a separate repo and build process for that. Using an IDL (Interface definition language), Protobuf allows you the ability to create simple or complex message schemas. The top level message is contained in an Outerclass, protoc will default the name of this outer class to yourMessageNameOuterClass.java. Spring Boot and Gradle provide a good framework to allow the developer to write applications quickly and not worry about problems from a changing schema.
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