Chapter J2EE.8. Application Assembly and Deployment

This chapter specifies Java 2 Platform, Enterprise Edition (J2EE) requirements for assembling, packaging, and deploying a J2EE application. The main goal of these requirements is to provide scalable modular application assembly and portable deployment of J2EE applications into any J2EE product.

J2EE applications are composed of one or more J2EE components and one J2EE application deployment descriptor. The deployment descriptor lists the application's components as modules. A J2EE module represents the basic unit of composition of a J2EE application. J2EE modules consist of one or more J2EE components and one component level deployment descriptor. The flexibility and extensibility of the J2EE component model facilitate the packaging and deployment of J2EE components as individual components , component libraries, or J2EE applications.

Figure J2EE.8-1 shows the composition model for J2EE deployment units and includes the optional usage of alternate deployment descriptors by the application package to preserve the signing of the original J2EE modules.

Figure J2EE.8-1. J2EE Deployment