This week's book giveaway is in the Spring forum. We're giving away four copies of Pro Spring MVC with WebFlux: Web Development in Spring Framework 5 and Spring Boot 2 and have Marten Deinum & Iuliana Cosmina on-line! See this thread for details.
JMS is a programming interface for message-oriented middleware (MOM) systems while MDB is a component model for event-based computing in the J2EE environment. Under the hood, a J2EE container uses the JMS API for getting messages to pass on from the MOM product.