If all you want to do is have the ability dynamically route, you can easily use the DBLookup mediator, and lookup from a [dynamic] DB table on the target destination for a request, and forward it accordingly. This way, adding/removing rows to the table will result in your requirementNo, this won't scale if the number of messages passing through Synapse is high, because every time I should query the DB.
This can be easily solved using a cache..
asankha
