This is the fourth course of a series of courses for Enterprise Web Application development based on several Open Source products. As we finished open source development tool courses, we are going to move on to “JSF with CDI” as the first course of Jakarta EE framework specification. Later we are taking care of “JPA + JTA with CDI”, “JAX-RS” and “Jakarta Batch” as minimum skills to develop Enterprise Web Application. In those courses, we refer to some “Application Architecture Design Patterns”. Therefore this series require the basic skills of Windows 10, CentOS, Eclipse IDE, Java SE (Oracle JDK or OpenJDK), Payara Server and PostgreSQL. Regarding the Payara Server, we can use another Web Application Server conforming to Jakarta EE specification. As for PostgreSQL, we might be able to use another RDBMS product instead. We can also make use of another Linux distribution instead of CentOS.