how to get jsr77 stats

[Viet Nguyen <vh...@gmail.com>]

Hi,

I have been trying to fetch the JSR 77 stats with the following snippet of
code

        Stats stats = null;
        try {
            stats = (Stats)mejb.getAttribute(objName, "stats");
        }catch (Exception ex){
            System.out.println("Error finding stats- " + ex.toString());
        }

And I get the exception message:

[INFO] Error finding stats- java.lang.ClassCastException:
org.apache.geronimo.management.stats.WebModuleStatsImpl

I am deploying a GBean into Geronimo, which I think is the worth mentioning
because I tried Anita's code from her work with Geronimo-1293 which uses a
very similar style of fetching the JSR 77 data. So I think the code itself
is not the problem. Because I have tried

        WebModuleStatsImpl stats = null;
        try {
            stats = (WebModuleStatsImpl)mejb.getAttribute(objName, "stats");
        }catch (Exception ex){
            System.out.println("Error finding stats- " + ex.toString());
        }

and I still get the same error.

Also, I even wrote this snippet to see what was up:

            Object o = (Object)mejb.getAttribute(objName, "stats");
            if(o instanceof WebModuleStatsImpl) {
                System.out.println("webmodulestatsimpl");
            } else if(o instanceof Stats) {
                System.out.println("stats");
            } else if(o instanceof WebModuleStats) {
                System.out.println("webmodulestats");
            } else{
                System.out.println("none of the above");
            }

By casting it to a Object, it was okay. But the output was "none of the
above." The weird thing about it is that when I executed System.out.println(
o.getClass().toString()); it tells me that the class is WebModuleStatsImpl.

I have tried a lot of variations and cannot figure this classcastexception
problem. If anyone can give me any insight, I will appreciate it.

Thanks,
Viet Nguyen

Re: how to get jsr77 stats

[Viet Nguyen <vh...@gmail.com>]

On 8/27/07, Paul McMahan <pa...@gmail.com> wrote:
>
> On Aug 27, 2007, at 4:36 PM, Viet Nguyen wrote:
>
> > The weird thing about it is that when I executed System.out.println
> > (o.getClass().toString()); it tells me that the class is
> > WebModuleStatsImpl.
>
> Do you have a copy of the geronimo-management jar either in your
> application or as a dependency in your deployment plan?  If so then
> you might want to inherit those classes via dependency on
> org.apache.geronimo.configs/j2ee-server//car instead.   That should
> help ensure that you're not dealing with the same class in two
> different classloaders.
>
>
> Best wishes,
> Paul


Wow, thanks a lot Paul. That fixed the problem.

-Viet

Re: how to get jsr77 stats

[Paul McMahan <pa...@gmail.com>]

On Aug 27, 2007, at 4:36 PM, Viet Nguyen wrote:

> The weird thing about it is that when I executed System.out.println 
> (o.getClass().toString()); it tells me that the class is  
> WebModuleStatsImpl.

Do you have a copy of the geronimo-management jar either in your  
application or as a dependency in your deployment plan?  If so then  
you might want to inherit those classes via dependency on  
org.apache.geronimo.configs/j2ee-server//car instead.   That should  
help ensure that you're not dealing with the same class in two  
different classloaders.


Best wishes,
Paul