Overview
J2EE and Web services applications are made up of components that can be deployed into different containers. These components are used to build a multi-tier enterprise application. Security for components is provided by their containers. A container provides two kinds of security: declarative and programmatic security.
Declarative security expresses an application's security structure, including security roles, access control, and authentication requirements, in a form external to the application (in a deployment descriptor). Programmatic security is embedded in an application and is used to make security decisions. Programmatic security is useful when declarative security alone is not sufficient to express the security model of an application. ...
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