== What is this app? This is an example of a Spring Cloud Stream demonstrating the processing of record batches. The application simply upper-cases the input records and sends them to another topic. === Running the app: Go to the root of the repository and do: `docker-compose up -d` (if you don't already have a Kafka broker running locally). `./mvnw clean package` `java -jar target/kafka-batch-sample-0.0.1-SNAPSHOT.jar ` There is a simple `@KafkaListener` method to display the records sent to the output topic. When run with `java -jar target/kafka-batch-sample-0.0.1-SNAPSHOT.jar --spring.profiles.active=transactional` the listener will suspend with `Hit Enter to exit the listener and commit transaction`. Pressing the enter key allows the listener to exit and the transaction will commit. Only then will you see the output from the `@KafkaListener` because its consumer is configured with `isolation.level: read_committed`.