Comments on: Wicket Guice updates

By: Thomas

Thomas — Mon, 09 Jun 2008 09:16:56 +0000

How does Wicket handle references of e.g. a non-serializable service implementation that is passed to a model as Alastair proposed? I assume this will throw a java.io.NotSerializableException. In my opinion Models should be injectable in Wicket like Components. In particular when working with loadable, detachable models you will likely want to inject a service that is responsible for loading the data. If the model a reusable public class, component-only injection will not help.
Example:
public class ContactModel extends LoadableDetachableModel {


	private Long contactId;
	@Inject

	private ContactService service;
	public ContactModel(Long contactId) {

	   this.contactId = contactId;

	}
	@Override

	protected Contact load() {

	return service.getContact(contactId);

	}

}

By: Alastair

Alastair — Wed, 07 May 2008 13:48:17 +0000

Wicket’s Spring and Guice injection don’t work inside models, only inside components. Inject a field of a component, and pass that reference into your model. It’ll do the right thing WRT serialization.

By: Callum

Callum — Wed, 07 May 2008 13:33:41 +0000

Hi there,

I am trying to do guice injection inside a LoadableDetachableModel and for some reason the filed I inject remains null. Oddly I use the same injection statement for the same object in a Page elsewhere and it works fine. Am I doing something wrong?

Cheers,

Callum