This class is used to search for members on the cluster through the opaque interface {@link BroadcastEndpoint}.
There are two current implementations, and that's probably all we will ever need.
We will probably keep both interfaces for a while as UDP is a simple solution requiring no extra dependencies which is suitable for users looking for embedded solutions.
@author
Tim Fox
@author Clebert Suconic
Created 17 Nov 2008 13:21:45