praekelt/vumi — pull request #433 by hodgestar (2012-12-12 15:45:53+00:00)
Title: Add LoadBalanceMultiplexer

I encountered an SSMI setup with two SSMI servers. The two servers load balance traffic but replies need to be sent to the server the message originated from. This can mostly easily be implemented by adding some routing information to the `transport_metadata` and then round-robining outbound requests that don't have the metadata.