Declarative security means that the security mechanism for an application is declared and handled externally to the application. Deployment descriptors describe the Java EE application’s security structure, including security roles, access control, and authentication requirements.
The Enterprise Server supports the deployment descriptors specified by Java EE and has additional security elements included in its own deployment descriptors. Declarative security is the application deployer’s responsibility. For more information about Sun-specific deployment descriptors, see the Sun GlassFish Enterprise Server v3 Prelude Application Deployment Guide.
There are two levels of declarative security, as follows:
For an individually deployed web or EJB module, you define roles using @DeclareRoles annotations or role-name elements in the Java EE deployment descriptor files web.xml or ejb-jar.xml.
To map roles to principals and groups, define matching security-role-mapping elements in the sun-ejb-jar.xml or sun-web.xml file for each role-name used by the application. For more information, see Roles, Principals, and Principal to Role Mapping.
Component level security encompasses web components and EJB components.
A secure web container authenticates users and authorizes access to a servlet or JSP by using the security policy laid out in the servlet XML deployment descriptors (web.xml and sun-web.xml files).