This example shows how to create a Stateless session EJB using annotations. As stated in the "JSR 220: Enterprise JavaBeansTM,Version 3.0 - EJB Core Contracts and Requirements",

What this means is quite simply that stateless beans are shared. They do in fact have state as you can assign values to the variables, etc. in the bean instance. The only catch is there are a pool of identical instances and you are not guaranteed to get the exact same instance on every call. For each call, you get whatever instance happens to be available. This is identical to checking out a book from the library or renting a movie from the video store. You are essentially checking out or renting a new bean instance on each method call.

With EJB 3.0, it's now possible to write stateless session bean without specifying a deployment descriptor; you basically have to write just a remote or local business interface, which is a

plain-old-java-interface,

annotated

with

the

@Remote

or

@Local

annotation

the

stateless

session

bean

implementation,

a

plain-old-java-object

which

implements

the

remote

or

the

local

business

interface

and

is

annotated

with

the

@Stateless

annotation

This

example

is

the

"simple-stateless"

example

located

in

the

openejb-examples.zip

available

on

the

download

page.