Ignacio Sánchez Ginés

This a simple tutorial about how to create a local dependecy injection within two EJBs 3.0.

The point is creating one EJB that calls a method from another local EJB with Netbeans and Glassfish.

Start Netbeans and create a new EJB project called Util and add a new session bean to it. Make it stateless and local.

@Local
public interface UtilLocal
{
    int returnInt();
}

@Stateless
public class UtilBean implements UtilLocal
{
    public int returnSomething()
    {
        return 0;
    }
}

Now create a second EJB project called Main and add a new session bean to it, like in the Util EJB. Include the Util EJB inside the Main EJB project.

@Local
public interface MainLocal
{
    int doSomeLogic();
}

@Stateless
public class MainBean implements MainLocal
{
    @EJB(beanName="UtilBean")
    UtilLocal utilEJB;

    public int doSomeLogic()
    {
        return utilEJB.returnSomething();
    }
}

Note that we use @EJB to instantiate the Util EJB object.


Simple yet effective