Re: WOInject failure with WOMonitor

Hi Steffan,

On 20/02/2013, at 13:15, Steffan Westcott <[email protected]> wrote:

> This question is probably best for Henrique, but I welcome any help on this.
> 
> I am attempting to introduce WOInject to an existing large Wonder
> application.

Good to hear. :)

> Launching the application locally in WoLips works
> perfectly, injection of some @Singletons works well.
> 
> My problems begin when the application is launched with WOMonitor. I
> get the following exception trace :
> 
> Caused by: java.lang.Error: Cannot initialize the application to take
> advantage of WOInject features.
> at com.woinject.WOInject.init(WOInject.java:89)
> at com.clicktravel.travelmanager2.app.Application.main(Application.java:23)
> ... 5 more
> Caused by: javassist.NotFoundException: com.webobjects.foundation._NSUtilities
> at javassist.ClassPool.get(ClassPool.java:450)
> at com.woinject.WOInject.init(WOInject.java:66)
> 

Looks like neither JavaFoundation nor ERFoundation libraries are in the application classpath.

> Googling for some answers turned up this message which is probably
> related to my issue :
> http://lists.apple.com/archives/webobjects-dev/2012/Jun/msg00242.html
> 
> I do not quite understand the advice given in the message, so am
> unclear if I am doing something wrong. I am using 1.1-SNAPSHOT of
> WOInject. I am also using an AppRunner class equivalent (which does
> not extend ERXApplication) which calls WOInject.init with the
> classname of my real Application class (which does extend
> ERXApplication).
> 

The WOInject website is a bit outdated. The latest stable version of WOInject is 1.0.1. I'm using this version in a huge application for more than a year without problems. The problem reported by Joseph in the mentioned thread seems to be unrelated with yours. Have you tried to configure your application as described in the WOInject Setup [1] section? Something like this:

package my.app;
 
import com.woinject.InjectableApplication;
import com.woinject.WOInject;
 
public class Application extends InjectableApplication {
    public static void main(String[] args) {
        WOInject.init("my.app.Application", args);
    }
    ...
}

Does it work?

> I note there is a branch hotfix-classloading on WOInject. Should I be
> using this version instead?

Only if you have strange class loading problems as reported by Joseph.

> Is it correct to change the WOMonitor configuration to point at the AppRunner class instead of my real
> Application class?
> 

Yes, you need to run the application from the AppRunner in this case. The original solution (described in the docs) doesn't need it.

Last year, I've started working in a framework/solution to reduce class loading problems without adding too much friction for WOInject users. I made some progress, but it's still not finished. The community interest in WOInject is a motivation for me to keep working on it. :)

[1]http://hprange.github.com/woinject/usage.html

Cheers,

Henrique

> Any help would be gratefully received!
> 
> Thanks,
> Steffan
> 
> -- 
> 
> ------------------------------
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> 
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