Java migrate-kafka-to-oracle

Kafka App Step 3

Migration step that adds transactional database writes to the Kafka-to-TxEventQ consumer.

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This module is step 3 of the [Kafka-to-TxEventQ migration sample](../README.md). It builds on the OSON-based messaging flow from step 2 and adds transactional database writes on the consumer side.

Highlights

Java 21+
Maven 3.9+
Oracle AI Database Free running on localhost:1521
The testuser schema and TxEventQ grants created with ../testuser.sql