Class-Based Injection

To use class-based injection, decorate the class with a @Resource annotation, and set the required name and type elements.

@Resource(name="myMessageQueue",
                type="javax.jms.ConnectionFactory")
public class SomeMessageBean {
...
}

Declaring Multiple Resources

The @Resources annotation is used to group together multiple @Resource declarations for class-based injection.

@Resources({
    @Resource(name="myMessageQueue",
                    type="javax.jms.ConnectionFactory"),
    @Resource(name="myMailSession",
                    type="javax.mail.Session")
})
public class SomeMessageBean {
...
}

The code above shows the @Resources annotation containing two @Resource declarations. One is a JMS message queue, and the other is a JavaMail session.