Comments on: Google Guice Tutorial

By: admin

admin — Tue, 29 Apr 2008 19:26:35 +0000

As I know that’s the only way to change the default binding: creating a Module class. Additionally a Provider (not discussed in this post) class can be created encapsulating some logic to decide at runtime which implementation should be provided.

The problem you described seems to be solved using a strategy pattern. Maybe I would go for it is I couldn’t create a Module class…

By: Gregg Bolinger

Gregg Bolinger — Tue, 29 Apr 2008 15:38:39 +0000

Good article. The only thing missing is how you bind both Notifier implementations and use one or the other without writing a Module to do the binding. There would be times when you would need to switch between sending and email and sending an SMS in a live environment. How do you handle that?

By: admin

admin — Sat, 26 Apr 2008 10:10:30 +0000

Fixed it in the post. Thanks:)

By: WurstFromHell

WurstFromHell — Fri, 25 Apr 2008 20:22:05 +0000

Nice article. As I tried your examples I stumbled upon a little mistake at the end:

Customer customer = injector.getInstance(Customer.class);
must be
Customer customer = anotherInjector.getInstance(Customer.class);

I’m looking forward to your next article!

By: admin

admin — Fri, 25 Apr 2008 16:49:02 +0000

You’re right, I’ve updated the article. Thanks for the remark

By: Jonhnny Weslley

Jonhnny Weslley — Fri, 25 Apr 2008 13:19:48 +0000

Great post!!!

But the constructor injector is wrong. It’s must to be:
public class Customer {
…
private Notifier notifier;

@Inject
public Customer(Notifier notifier) {
this.notifier = notifier;
}
…
}