Overview

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The Code

In this example we develop two simple session stateless beans (DataReader and DataStore), and show how we can use the @EJB annotation in one of these beans to get the reference to the other session bean

DataStore session bean

Local business interface

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Remote business interface

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Bean

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DataReader session bean

Local business interface

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Bean

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(The remote business interface is not shown for the sake of brevity).

@EJB annotation You can use the @EJB annotation to refer a session bean in other components specified by the Java EE platform, for instance: Servlets ServletContextListeners Servlet Filters JSF managed beans EJB interceptors JAX-WS service endpoints

Writing a unit test for the example

Writing an unit test for this example is quite simple. We need just to write a setup method to create and initialize the InitialContext, and then write our test methods

setUp

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Test

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Running

Running the example is fairly simple, just run:

$ cd ejb-injection
$ mvn clean install

Which should create output like the following.