Application Client Module

What Does Application Client Module Mean?

In Java Platform 2, Enterprise Edition (J2EE), an application client module contains a Java application that connects to a J2EE server and uses its resources.


An application client module contains the application client deployment descriptor and one or more classes. In J2EE, a module contains one or more J2EE components, as well as a component deployment descriptor of the corresponding container type.

Techopedia Explains Application Client Module

There are four types of J2EE modules:

  • Application client module: Contains an application client deployment descriptor, which is an Extensible Markup Language (XML) file with an .xml extension, in addition to class files, which are packed as Java Archive (JAR) files with .jar extensions.
  • Enterprise JavaBeans (EJB) module: Contains an EJB deployment descriptor and class files.
  • Web module: Contains a Web application deployment descriptor, servlet class files and Java Server Pages (JSP) files.
  • Resource adapter module: Contains Java interfaces, classes, libraries, documentation and a resource adapter deployment descriptor.

An application client module includes server-side client routines, and the required resources are contained within the application client projects.

An application client component may only be executed after it is assembled as a J2EE module and installed in its container.


Related Terms

Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…