Posts tagged ‘JEE’

Single sign-on (SSO): Concepts, Methods and Frameworks

Single sign-on (SSO) is a method of access control that enables a user to log in once and gain access to the resources of multiple software systems without being prompted to log in again. Single sign-off is the reverse process whereby a single action of signing out terminates access to multiple software systems.

As different applications and resources support different authentication mechanisms, single sign-on has to internally translate to and store different credentials compared to what is used for initial authentication.

As IT systems proliferate to support business processes, users and system administrators are faced with an increasingly complicated interface to accomplish their job functions. Users typically have to sign-on to multiple systems, necessitating an equivalent number of sign-on dialogues, each of which may involve different usernames and authentication information. System administrators are faced with managing user accounts within each of the multiple systems to be accessed in a co-ordinated manner in order to maintain the integrity of security policy enforcement.

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Continue Reading 21 July, 2008 at 17:34 3 comments

Java Annotations: Concepts, Methods and Examples

An annotation, in the Java computer programming language, is a special form of syntactic metadata that can be added to Java source code. Classes, methods, variables, parameters and packages may be annotated. Unlike Javadoc tags, Java annotations are reflective in that they are embedded in class files generated by the compiler and may be retained by the Java VM to be made retrievable at run-time.

Annotations are a metaprogramming facility introduced J2SE 5.0. They allow us to mark code with defined tags. Some developers think that the Java compiler understands the tag and work accordingly. This is not right. The tags actually have no meaning to the Java compiler or runtime itself. There are tools that can interpret these tags. For instance: IDEs, testing tools, profiling tools, and code-generation tools understands these tags.

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Continue Reading 14 July, 2008 at 14:15 4 comments

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