Pick the destination for a given message.
Pick the destination for a given message. Normally it picks one of the
passed routees
, but in the end it is up to the implementation to
return whatever Routee to use for sending a specific message.
When implemented from Java it can be good to know that
routees.apply(index)
can be used to get an element
from the IndexedSeq
.
The interface of the routing logic that is used in a Router to select destination routed messages.
The implementation must be thread safe.