Referential Integrity in RMI:
If two references to an object are passed from one JVM to another JVM in parameters (or in the return value) in a single remote method call and those references refer to the same object in the sending JVM, those references will refer to a single copy of the object in the receiving JVM.
To test:
sbt clean compile test
To run Server:
sbt clean compile "runMain Server"
or
sbt clean compile run (select Server i.e option 2)
To run Client:
sbt "runMain Client"
or
sbt run (select Client i.e option 1)