|          |
producer 1       |          |      consumer 1 
producer 2   ->  | {Events} |   <- consumer 2
...              |          |     ...
producer n       |          |      consumer n
                 |          |

References

https://ookami86.github.io/event-sourcing-in-practice/

http://martinfowler.com/eaaDev/EventSourcing.html

http://www.slideshare.net/SanderMak/eventsourced-architectures-with-akka