I’ve updated the Wicket Guice integration project with some new features. The last of the following wasn’t quite done in time to make the upcoming Wicket 1.3.0-rc1 release, but the other features listed here are in. They are:
- Support for Provider<T> -based injection.
- Support for TypeLiteral<T> -based injection.
- A GuiceWebApplicationFactory, so you can make your WebApplication subclass Guice-managed (see the javadoc for details).
My thanks to JR Boyens for getting the ball rolling on the the first two (WICKET-1063).
Do try it out and give me feedback on configuration issues if it doesn’t quite suit you, preferably so I can fix them for you before the rc2 release.
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
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.
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);
}
}