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In our example, we will be adding an EJB module and an Application Client module.
Any type of Java EE module can be a JMS message producer and/or
consumer by simply invoking methods from the JMS API, we chose
to create an EJB module since later in the chapter we will be creating
a Message Driven Bean ( MDB ), that is a type of EJB. We chose an ap-
plication client since it is one of the simplest modules that can be added
to an enterprise application, allowing us to focus on JMS code without
having to worry about writing lots of extraneous code. However, in real
applications, it is common to have web applications or Session Beans act
as JMS message producers, with an MDB acting as the consumer.
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