public class RequestThrottledEvent
extends CongestionControlEvent
When a request that comes in is not passed up to the application because of
congestion control.
The event gives details on what triggered the throttling.
The service logic may introduce a SipServletResponse that should be sent back to the originator of
the request in the ServletContext as attribute.
The attribute name should be "org.mobicents.servlet.sip.THROTTLED_RESPONSE".
If null, then the container will generate the response
automatically.