[rules-users] Rules execution (get information about end of execution)

Hi, I need to know at a given time, if a WorkingMemory is executing one or more rules. The goal is to ask to rules engine if it is processing something or not.... Anyone tried this before? Drools don't seem to have direct support for this. I tried an approach using Activations, but it is not possible since they can be zero sized, and can be finishing executing something. Any ideas? Thanks in advance Carlos Vieira