code: public void activityEnded(ActivityHandle ah) {		
  		if (tracer.isFineEnabled()) {
  			tracer.fine("activityEnded( handle = "+ah+")");
  		}
  		// just remove the handle
  	    activities.remove(ah);
  	}
docs: /*
  (non-Javadoc)
  @see javax.slee.resource.ResourceAdaptor#activityEnded(javax.slee.resource.ActivityHandle)