Question

In other words, making JBoss run a SQL script file or bean immediately on startup.

I want to re-populate my database each time it gets re-constructed when I re-launch my app. How do I do this?

Answer 1

Depending about JBoss version (Singleton being introduced in Java EE 6) you can maybe use Singleton bean annotated with Startup and execute these operations in @PostConstruct method.

Something like following:

import javax.annotation.PostConstruct;
import javax.ejb.Singleton;
import javax.ejb.Startup;

@Singleton
@Startup
public class Initializer {
    @PostConstruct
    public void populate() {
        //initialize database here
    }
}

According specification Singleton bean is instantiated once for each JVM – consequently usage in cluster can bring surprises.