An

1. Akka.NET

5. class ConsoleWriterActor : UntypedActor
{
protected override void OnReceive(object message)
{
if (message is Messages.InputError)
{
var msg = message as Messages.InputError;
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine(msg.Reason);
}
else
{
Console.WriteLine(message);
}
Console.ResetColor();
}
}

6. System = ActorSystem.Create("MyActorSystem");
var props = Props.Create<ConsoleWriterActor>();
var actor = System.ActorOf(props, "consoleWriterActor");
Creating the system & an actor

7. Messages are POCOs
Message-passing is asynchronous
Messages are immutable

8. actor.Tell("message");
Sending a message
Nothing more 

11. _consoleWriterActor.Tell(new Messages.NullInputError());
Sender.Tell(new Messages.ContinueProcessing());
Context.ActorSelection("akka://MyActorSystem/user/tailCoordinatorActor")
.Tell(new TailCoordinatorActor.StartTail(msg, _consoleWriterActor));
Communication between actors

14. protected override SupervisorStrategy SupervisorStrategy()
{
return new OneForOneStrategy(
10, // maxNumberOfRetries
TimeSpan.FromSeconds(30), // duration
x =>
{
if (x is ApplicationException)
return Directive.Escalate;
if (x is ArithmeticException)
return Directive.Resume;
if (x is NotSupportedException)
return Directive.Stop;
return Directive.Restart;
});
}
Supervision strategy

15. Asynchronous system
.WithDispatcher("akka.actor.synchronized-dispatcher")

16. Routers

17. Actors pool

18. Blocking actors
var getStarrer = _gitHubClient.Activity.Starring.GetAllForUser(starrer);
//ewww
getStarrer.Wait();
var starredRepos = getStarrer.Result;
Sender.Tell(new StarredReposForUser(starrer, starredRepos));

19. Async inside an actor
var sender = Sender;
var getStarrer = _gitHubClient.Activity.Starring.GetAllForUser(starrer);
getStarrer.ContinueWith<StarredReposForUser>(res =>
{
var starredRepos = getStarrer.Result;
return new StarredReposForUser(starrer, starredRepos
}).PipeTo(sender);

22. Plugins
Akka.Remote
Akka.Cluster
Akka.Persistence
Akka.TestKit

23. Yes, it scales

24. Resources
• http://getakka.net/
• https://github.com/akkadotnet/akka.net
• https://github.com/petabridge/akkadotnet-code-
samples
• https://petabridge.com/bootcamp/
• https://www.youtube.com/c/PetabridgeAcademy

25. 25

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