Akka Persistence as a configuration datastore for a distributed control system

<!--HTML-->Akka is a library implementing the actor model on the JVM.It enables the developement of distributed, concurrent, fault-tolerant and scalable applications. Akka persistence enables actors to persist their internal state so that it can be recovered where an actor is restarted. We demonstrate the practical application of akka persistence to build a configuration datastore for the control system of CERNs electrical network using CQRS and Event Sourcing.