serhiyeniavl/configuration-scheme-bean-generator

Kafka producers/consumers property-based generation

Create beans KafkaTemplate<String, ? extends BasicEvent> and KafkaMessageListenerContainer for every event specified in properties file.

Producer usage: inject bean BasicEventKafkaSender<T extends BasicEvent> (create automatically from properties) into your class.
Consumer usage: create bean in context by extending EventReceiver<T extends BasicEvent> and override mandatory method for receiving from kafka topic (will be invoked automatically by KafkaMessageListenerContainer).

All events must be data classes extend from BasicEvent and represented in EventType enum. Event type in properties file should be in lowel-hypen string style and suit to upper underscore style of enum constant in EventType

Properties file example:

events:
  some-event:
    producer: default
    consumer: some-event-consumer
  another-event:
    producer: default
    consumer: another-event-consumer
  configs:
    producers:
      default:
        bootstrap-servers: ${spring.embedded.kafka.brokers}
    consumers:
      some-event-consumer:
        bootstrap-servers: ${spring.embedded.kafka.brokers}
        group-id: some-event-consumer-group
        auto-startup: true
        auto-offset-reset: earliest
      another-event-consumer:
        bootstrap-servers: ${spring.embedded.kafka.brokers}
        group-id: another-event-consumer-group
        auto-startup: true
        auto-offset-reset: earliest