When it comes to Tactical Domain-Driven Design, there are two principal options. Use a complex framework or provide an implementation from scratch.
Another option is the TRINITY4J, a lightweight library for DDD applications in Java. It distills the best solutions for common problems when applying DDD.
TRINITY4J follows the structure of the Trinity Architecture pattern. Thus, it is a perfect fit for Trinity-based Java applications. Nonetheless, you can also use it in any application that does not follow the Trinity pattern.
To learn more about the Trinity Architecture go to: https://medium.com/oregor/the-trinity-architecture-c89ed5743c1e