What is the J2EE module?

by

A J2EE module consists of one or more J2EE components for the same container type and one component deployment descriptor of that type.

Java 2 Platform, Enterprise Edition (J2EE) has been rebranded as Jakarta EE, but the concepts remain the same. In the context of Jakarta EE (or J2EE), a module refers to a self-contained unit that encapsulates a specific functionality within an enterprise application. These modules are the building blocks of J2EE applications and provide a way to organize and structure the application.

The J2EE (or Jakarta EE) specification defines several types of modules, including:

  1. Enterprise JavaBeans (EJB) Modules: These modules encapsulate business logic and are responsible for the server-side processing in a J2EE application.
  2. Web Modules: These modules contain servlets, JSP pages, and other web-related components. They handle the presentation layer of the application.
  3. Connector Modules: These modules provide connectivity to enterprise information systems and are used to integrate J2EE applications with other enterprise systems.
  4. Application Client Modules: These modules contain Java applications that run on the client side and interact with the server-side components.

Each module type has its specific purpose and role within the overall enterprise application. The modular structure allows for easier development, maintenance, and scalability of large-scale enterprise applications.