Session Bean | Entity Bean | War Files vs Ear Files Vs Ear Files
Session Bean:
Session is one of the EJBs and it represents a single client inside the
Application Server. Stateless session is easy to develop and its efficient. As
compare to entity beans session beans require few server resources.
A session bean
is similar to an interactive session and is not shared; it can have only one
client, in the same way that an interactive session can have only one user. A
session bean is not persistent and it is destroyed once the session terminates.
Entity Bean: An
entity bean represents persistent global data from the database. Entity beans
data are stored into database.
Difference
between war rar and ear files?
Answer: These files are simply zipped file
using java jar tool. These files are created for different purposes. Here is
the description of these files:
.jar files:
These files are with the .jar extenstion. The .jar files contains the
libraries, resources and accessories files like property files.
.war files: These
files are with the .war extension. The war file contains the web application
that can be deployed on the any servlet/jsp container. The .war file contains
jsp, html, javascript and other files for necessary for the development of web
applications.
.ear files: The
.ear file contains the EJB modules of the application.