Comment by pmmi...@gmail.com:
Would look to add something for newcomers like me. Don't know how obvious
or not this is (it wasn't for me), but if you instantiate MyService
MANUALLY your EntityManager will be null and calls will throw
NullPointerException. Since we are using Guice already, just create a new
module which you can add after MyModule when you call createInjector
public class ServiceModule extends AbstractModule {
@Override
protected void configure() {
bind(Service.class).to(MyService.class);
}
}
For more information:
http://code.google.com/p/google-guice/wiki/JPA
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