The exchange-exchange binding allows for messages to be sent/routed from one exchange to another exchange. Exchange-exchange binding works more or less the same way as exchange-to-queue binding, the only significant difference from the surface is that both exchanges(source and destination) have to be specified.
Two major advantages of using exchange-exhhange bindings based on experience and what I have found after doing some research are:
- Exchange-to-exchange bindings are much more flexible in terms of the topology that you can design, promotes decoupling & reduce binding churn
- Exchange-to-exchange bindings are said to be very light weight and as a result help to increase performance *