Pipeline example

[Carpenter, Scott]

Title: Pipeline example

I am new to Hivemind and Tapestry and have been reading the documentation. I believe I want to use Pipelines to secure certain methods in an application - specifically to receive an event before and after Tapestry's ListenerMap invokes the listener method. That way we can implement method-level security access control on individual actions for each page. A pipeline example would really help get me started. Thanks.