Here are two options I can come up with off the top of my head, assuming I
understand your problem correctly.
You can do a static injection of UserDb in the JPASocialModule which means
the field will have to be static. Or, you can modify the @Injected
constructor for PersonServiceDb to have an
@Named("shindig.signing.global-callback-url") param that you can then pass
along to UserDb when you instanstiate it, assuming you are instanstiating
it. If UserDb is a singleton then I would go with the static injection
approach.
Best regards,
-Stanton
From: Evgeny Bogdanov <[email protected]>
To: [email protected],
Date: 12/22/2011 08:42
Subject: Re: Guice problem in persistence
On 22.12.11 13:53, Stanton Sievers wrote:
> Hi,
>
> How is your UserDb class being injected? Make sure it's not being
> injected before the PropertiesModule, which by default is injected via
the
> web.xml.
The thing is I am not very comfortable with Guice injection mechanism.
So I do not know if it is injected or not. This I have currently
1. In web.xml (JPA module is after Properties)
org.apache.shindig.common.PropertiesModule:
org.apache.shindig.gadgets.DefaultGuiceModule:
org.apache.shindig.social.core.config.SocialApiGuiceModule:
org.apache.shindig.graaasp.jpa.spi.JPASocialModule:
2. In JPA I have explicit injection
bind(PersonService.class).to(PersonServiceDb.class).in(Scopes.SINGLETON);
3. In PersonServiceDb I import the class UserDb.java:
import org.apache.shindig.social.core.model.UserDb;
So, I believe it does not do any injection for UserDb this way.
Then the question is how do I inject UserDb or how do I pass the data
from PropertiesModule
to my UserDb.java class.
>
> If your class isn't being injected at all you can request a static
> injection in an existing guice module (or your own).
> requestStaticInjection(UserDb.class)
I tried to add it in JPASocialModule, but it does not seem to be
working. The field CALLBACK_URL is still null.
>
> I also prefer method injection to field injection for setting values.
I'm
> not sure if one is preferred over the other in the broader community or
> not.
Could you give a small example how you do it.
>
> -Stanton
>
>
>
> From: Evgeny Bogdanov<[email protected]>
> To: [email protected],
> Date: 12/22/2011 06:30
> Subject: Guice problem in persistence
>
>
>
> Hi
>
> I have small problem, maybe somebody can point out where it is.
>
> I have this line in shindig.properties:
>
shindig.signing.global-callback-url=http://localhost:8080/gadgets/oauthcallback
> I want to access it from my db class.
>
> Properties file is read in PropertiesModule.java and Guice's Named
> annotation is created with
> Names.bindProperties(this.binder(), getProperties());
>
> Then I try to access it as following in my UserDb.java class
> @Transient
> @Inject @Named("shindig.signing.global-callback-url") String
> CALLBACK_URL;
>
> For some reason, it is always null.
> Could somebody explain why I can't do it? What is the workaround. I
> don't want to read properties file again,
> since it's done in PropertiesModule.java already.
>
> Any suggestions?
>
> Best
> Evgeny
>
>
>
