DDD Leaven
A production-ready DDD and CQRS sample implementation for advanced domain modeling with Spring and JPA.
What is DDD Leaven?
ddd-leaven-v2 is a sample implementation of Domain-Driven Design (DDD) and Command Query Responsibility Segregation (CQRS) patterns using Spring and JPA. It helps developers start with advanced domain modeling by providing production-ready code examples and best practices. The project addresses real-world problems and solutions without technical compromises.
Java developers and architects building enterprise applications who want to implement DDD and CQRS patterns effectively. It's particularly useful for teams exploring domain modeling techniques and looking for practical, production-ready examples.
Developers choose this project because it provides a complete, noninvasive implementation of DDD building blocks without unnecessary framework complexity. Its portable architecture allows adaptation to any Java platform, and the focus on linguistic techniques helps bridge the gap between domain experts and technical implementation.
Overview
DDD-CqRS sample v2.0 project that helps you with starting out advanced domain modeling using Spring, JPA and testing
Use Cases
Best For
- Learning DDD and CQRS patterns with real-world Java examples
- Starting a new enterprise application with Spring and JPA
- Implementing advanced domain modeling techniques in production code
- Studying portable architecture design for Java frameworks
- Exploring linguistic techniques for domain knowledge exploration
- Building maintainable enterprise applications with clear separation of concerns
Not Ideal For
- Applications with straightforward CRUD operations lacking complex business logic
- Teams preferring framework-driven development with minimal custom architecture
- Projects under tight deadlines needing quick, out-of-the-box solutions
Pros & Cons
Pros
Presents sample implementation of all DDD Building Blocks without technical compromises, addressing real-world problems as highlighted in the README goals.
Provides tools for exploring domain expert knowledge during modeling sessions, bridging the gap between business and technical teams, as described in the project's key features.
Offers well-crafted code ready for utilization in real projects, ensuring high quality and maintainability, according to the README's emphasis on practical use.
Avoids platform-specific solutions, allowing implementation with any Java framework, despite being based on Spring and JPA, as stated in the portable architecture section.
Cons
The wiki is still under construction, forcing users to rely on external resources like Prezi and Google Groups for navigation and support, as noted upfront in the README.
The 'leaven' philosophy requires deep understanding and modification of the code, which can be time-consuming and demands advanced DDD expertise, as emphasized in the 'You are the Architect!' section.
As a sample project, it lacks plug-and-play features, necessitating significant setup and integration effort rather than offering drop-in solutions.
Frequently Asked Questions
Related Projects
DDD By Examples - LibraryA comprehensive Domain-Driven Design example with problem space strategic analysis and various tactical patterns.
DDDSampleThis is the new home of the original DDD Sample app (previously hosted at sf.net)..
IDDD SamplesThese are the sample Bounded Contexts from the book "Implementing Domain-Driven Design" by Vaughn Vernon: http://vaughnvernon.co/?page_id=168
Event Sourcing and CQRS ExamplesEvent Sourcing and CQRS in practice.
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