[rules-dev] Help need

Dear Sir/Madam, I am a newbie to the drools world working as an interne at an IT enterprise. Can any of you be kind enough to answer me the following question. I want to create a small test class which would register an event when it is fired in the work flow. (I am not sure if i have to use SignalEventCommand). The goal is to have a look up table where i register whatever events are fired during the execution of a work flow. The later part would be to have a web-service which would then communicate with the external systems through the lookup table. I really have no idea of how to proceed with it. I have read a lot of documentation but unfortunately i cannot find a way to get started. Some kind of tutorial will be really helpful and appreciable. Please help me with this if possible. I shall be thankful. Regards Jaffar Nawaz