Let's now turn our attention to WebLogic's infrastructure for application-level security. WebLogic defines a standard set of SSPIs that provide high-level security services. WebLogic also supplies a default set of security providers that implement these SSPIs. These default security providers support and enhance the standard J2EE role-based security framework. In fact, they also allow you to programmatically control its behavior. There are two important characteristics of this security framework:
The SSPIs are split into discrete modules so that each security provider can deal with different but specific aspects of WebLogic's security (e.g., authentication, authorization, auditing, and more).
Because these security providers live behind a layer of SSPIs, WebLogic makes it easier to replace or enhance the default implementation with your own or a third-party implementation.
The SSPIs hide the actual implementation of the security providers, thereby enabling you to plug in and play your own modules and modify selected aspects of the security. For instance, the default Authentication Provider can be replaced with one that supports some form of biometric recognition, or the Auditing Provider can be replaced with one that notifies interested parties after a user has made a certain number of failed attempts to log in.
A security realm is a logical grouping of users, groups, roles, and security policies, along with a complete set of security ...