SampleExtension still available after it is being removed?

Hi,

Why is that I can still use the SampleExtension component after I have delete the mediatorSampleExtension.war and the mediatorSampleExtension folder from webapps and restarted Tomcat?

Is there some kind of cache somewhere? If so, how can I clear it?

At first I tried to add a method to this sample extension but when I try to use it, Mediator complains that there is a “method not found”. Therefore, I suspect that the changes I did to mediatorSampleExtension did not affect. And indeed, it makes no difference even if I delete everything from webapps.

Thanks.