This tutorial shows how Actors are instantiated and how they communicate with each other. A PongActor is instantiated as a service on CPU core #2, then a PingActor is instantiated on CPU core #1. A TravelLogEvent is sent from Ping to Pong and back to Ping, recording its location at each stop.
This tutorial also shows how to terminate the workflow deterministically by overriding PingActor's onDestroyRequest() method and either accepting the destruction request with acceptDestroy(), if the workflow is done, or postponing the destruction request, if work is still ongoing, and requesting the destruction be attempted again at the next event loop iteration by calling requestDestroy().