JMS

Java Message Service (JMS) is a Java API that allows applications to create, send, receive, and read messages. SeedStack JMS add-on provides a JMS 1.1 integration (JSR 914).

JPA with the business framework   JPA with the business framework

While you can do plain JPA by injecting EntityManager anywhere, it is better to define an architectural layer where you encapsulate persistence-related operations. In the business framework, persistence is confined to Repositories. JPA repository Default JPA repository The JPA add-on will provide a default JPA repository implementation for every aggregate that does not have a custom one. Two cases may occur: You don’t have any custom repository interface an particular aggregate.