The Need for JBoss Seam
by, 04-27-2012 at 05:41 PM (644 Views)
Let us exactly define what JBoss seam is. JBoss Seam provides a Light-weight Container for J2EE standards and it addresses the long-standing issues in any Typical Web Application like State Management and Better Browser Navigation. It also neatly provides an integration between the two popular technologies, Java Server Faces (in the UI tier) and Enterprise Java Beans (EJB 3 in the Server Side). Before getting into the various details about JBoss Seam let us see the common set of problems that are being faced in a Development and the Usability of a typical Web Application using Java Server Faces and Enterprise Java Beans.
In the Client side, for designing and presenting the form with the input controls (text-field and button) to the user, we may have written a userinput.jsp page with the set of JSF core tag libraries like <f:view> and <h:form>. And then, a JSF Managed Bean called UserBean encapsulated with properties(username and password) may have been coded which serves as a Model. The UI components values within the JSP page would have got bound to the properties of the Managed Bean with the help of JSF Expression Language. Since the logic is to query from the database for the existence of the username and the password, a Stateless Session Facade Bean would have been written whose sole purpose is to persistence the client information to the database. For persistence the information, the Session Bean may depend on the EntityManager API for querying and persisting entities.