EJB and J2EE Enterprise Applications

If the user clicks next on a paginated list, Ajax allows you to just refresh the list with the server data, instead of redrawing the entire page.

Java struts is described as- it is a way of looking at things.

Its output is an ejb-jar file that contains one or more enterprise beans.

The application assembler has inserted the application assembly instruction into the deployment descriptors.

View components are those pieces of an application that present information to users and accept input.

EJB container provider's tools are used to generate code that moves data between the enterprise bean's instance variables and a database or an existing application.

The EJB container handles the data access calls automatically.

Controller components of the MVC coordinate activities in the application.

An entity bean might represent a customer, a piece of equipment, an item in inventory, or even a place.

A session bean is not shared, it means that it may have just one client.

It extends javax.ejb.EJBHome, which in turn extends java.rmi.Remote.

The enterprise java beans architecture will address the development, deployment and runtime aspects of an enterprise application's life cycle.

It is responsible for mapping the security roles defined by the application assembler to the user groups and accounts that exist in the operational environment in which the enterprise beans are deployed.

When a client invokes the method of a stateless bean, the bean's instance variables may contain a state, but only for the duration of the invocation.