Startup bean not called

问题

I created a Java Web Application Project in NetBeans, and created a startup bean in it:

package malibu.util;

import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.ejb.LocalBean;

@Stateless
@LocalBean
@javax.ejb.Startup
public class Startup {
    @EJB
    private ProviderEJB providerEJB;

    @PostConstruct
    public void onStartup() {
        System.err.println("Initialization success.");
    }
}

But the code is not called after I deploy the application. What can cause this?

回答1:

Try the following set of annotations:

@Singleton
@Startup
public class Startup {
    @EJB
    private ProviderEJB providerEJB;

    @PostConstruct
    public void onStartup() {
        System.err.println("Initialization success.");
    }
}

You will find more details here and in this book (chapter 2).

回答2:

The Startup annotation is for usage with Singleton beans, not with stateless beans. See the javadoc.

Also, @LocalBean is not needed in this case. This declares that you want an additional no-interface view, but this is only needed if the bean implements a remote or local business interface. If you omit it you get a no-interface view by default.

回答3:

http://docs.oracle.com/javaee/6/api/javax/ejb/Startup.html

Mark a singleton bean for eager initialization during the application startup sequence.

来源：https://stackoverflow.com/questions/6820838/startup-bean-not-called