✨ Kafka properties handling

Centralized, safe, and CDI-friendly Kafka client configuration for Java 21 (Jakarta EE) with Lombok.

Features

• Layered property resolution (file → env → system → programmatic)
• Single model for common/producer/consumer/admin configs
• Validation and safe logging (secrets masked)
• Builders to produce java.util.Properties per client type
• CDI producers for easy injection

Property keys

• Prefix-based, stripped before use:
  • kafka.common.bootstrap.servers=localhost:9092
  • kafka.producer.acks=all
  • kafka.consumer.group.id=my-group
  • kafka.admin.client.id=admin-1

Precedence

• Lowest to highest: properties file → environment variables → system properties → programmatic overrides