Java Scaffold

Java Scaffold Skill

Purpose

Generate runnable Quarkus project structures following the BCE pattern.

Tech Stack

• Quarkus (current LTS), Java 21 (Records, Pattern Matching, Sealed Classes)
• RESTEasy Reactive (not Classic)
• Hibernate ORM with Panache (Active Record or Repository)
• Jackson for JSON (quarkus-rest-jackson)
• LangChain4j via quarkus-langchain4j-ollama for AI services

BCE Package Structure

src/main/java/de/example/module/
├── boundary/        # REST resources, WebSocket endpoints
├── control/         # Business services, AI services
├── entity/          # JPA entities, Records/DTOs, Value Objects
└── config/          # ConfigMappings, exception mappers

Conventions

• Java Records for DTOs and API responses
• CDI (@ApplicationScoped, @Inject) instead of manual instantiation
• @ConfigProperty or @ConfigMapping for configuration
• @ServerExceptionMapper for error handling
• Logging via @Inject Logger or Log.info()

Output

Generated code always includes:

1. All necessary imports
2. Matching application.properties configuration
3. Maven dependencies as a <dependency> block
4. Notes on required Dev Services or Ollama models