akkadotnet/akka.net

Port of Akka actors for .NET

Damian Reeves

@DamianReeves

nm... I see you send back an Error with an InvalidCastException

Lutando Ngqakaza

@Lutando

can i send Stream objects as instance of my message?

Lutando Ngqakaza

@Lutando

ie anything that inherits IO.Stream

Arjen Smits

@Danthar

@schepersk I was there today @ #DDDEU, and im there tomorrow as well

there was some good exposure for akka.net as well

Wim Van Houts

@_kiwi78_twitter

In the docu it states that it is best not to instantiate the runtime in an ASP.NET application because IIS behaviour, which I agree upon, and, it states it would be best to create the runtime and actors in a separate application (or windows service). In this scenario, what would be the advised way to communicate between te ASP.NET applicaiton and the runtime? Is it a good idea to instantiate a runtime in the ASP.NET app which if it runs, gets a reference to the actors in the windows service runtime (using Akka.remote)? Any alternatives?

Arjen Smits

@Danthar

no what is meant, is that its best to run a seperate application, which is part of your cluster. And have that application expose a service interface that your webapp calls. Via WCF or something

Arjen Smits

@Danthar

ofc does not have to be part of a cluster or anything. can be a stand alone actor system as well

Sean Gilliam

@sean-gilliam

Via WCF or something
WCF

: PTSD triggered : :P

Bartosz Sypytkowski

@Horusiath

@Lutando not by default. If you try hard, you could achieve that, but that is rather the case of stinky design and potential leaks.

Arjen Smits

@Danthar

@sean-gilliam lol :D

Aaron Stannard

@Aaronontheweb

@_kiwi78_twitter you can still create a razor thin actor system in ASP.NET

and pipe data to a cluster over Akka.Remote

you just want to avoid keeping stateful actors inside your web apps is all

wrote about this in some detail here: https://petabridge.com/blog/akkadotnet-aspnet/

Kris Schepers

@schepersk

@Danthar In deed, fairly good beginner session by Info Support..

@Danthar We should have a quick chat if we bump into each other :-)

Arjen Smits

@Danthar

Sure thing!. We will be in the keynote. And the playing with projections session after that

Arjen Smits

@Danthar

The beginner session. Was by Edwin van wijk right?. Saw that on techdays last year.

Maxim Cherednik

@maxcherednik

hi @Danthar, trying to solve some strange issue with logging. Just need some extra hints what and how to check. For some reason logging is not working on the web node. Config is the same as on windows service. Logging itself is working outside of the akka code. Any hints?

Chutipong Roobklom

@khunemz

Hi I am M , from Bangkok

Maxim Cherednik

@maxcherednik

found it - bindingRedirection :(

Arjen Smits

@Danthar

@schepersk. We are in the middle of the pit downstairs

Jakub Čermák

@jakubcermak

hi. I've a question about akka.net and I can't find the answer anywhere. I'd like to use akka cluster with priority mailbox. Is it possible? The cluster works as expected (without the mailbox), and the priority mailbox works fine locally. But when I try to deploy nonlocal routee actors with my custom priority mailbox, the messages are not processed regarging to their priorities. Can you help me please? Is there any example?

Arsene T. Gandote

@Tochemey

Hello

What is the best way to call an async method in the AroundPreStart method?

Can just do async method().configureAwait(false);?

If so is there any side effect since the method is returning void?

Natan Vivo

@nvivo

@Tochemey you could cal .Wait() on any task, but it wouldn't be a good idea. if you need async initialization, I suggest doing in a message

@Tochemey whenever I need to do some async work before getting the actor ready, I do something like:

Constructor() {
    Self.Tell(new Initialize());

    ReceiveAsync<Initialize>(async _ => {
        await Whatever();
        ...
        Become(Ready);
    });
}

void Ready() {
    Receive<ActualMessages>(...);
    ...
}

Rahul Singh

@xingh

anyone know of a good reference application that leverages akka (scala) and akka.net on dotnetcore .. with or without an intermediary queue engine like rabbitmq

Aaron Stannard

@Aaronontheweb

@jakubcermak yep, you can do both

but the priority mailbox works only for specific actors

but it sounds like remote deployment with a custom mailbox is not working? am I correct in understanding that?

if so, could you please open up a Github issue for that? should be easy for us to test if that's the case

might be an issue with the fully qualified name of the mailbox not being passed through correctly

also: the binary that defines the custom mailbox is present on both the deployer and the deployee , right?

and the mailbox is registered with the same name on both the deployer and deployee's HOCON too?

Ismael Hamed

@ismaelhamed

Is there anything like the Command Line Management available to manage a cluster in Akka.NET?

stevemesser

@stevemesser

Arsene T. Gandote

@Tochemey

@nvivo Tx

Thomas Tomanek

@thomastomanek

does anyone know what magic causes the ActorCellKeepingSynchronizationContext to be used by a TestActorRef'd actor but not by a regular LocalActorRef? As far as I can tell the sync context is applied in the testkit as the global SynchronizationContext always

Bartosz Sypytkowski

@Horusiath

@thomastomanek I'm not sure if I remember correctly, but it may be that testkit actor system runs executing everything in a single thread rather than on the thread pool

Thomas Tomanek

@thomastomanek

@Horusiath hey, yeah that's it I think. TestActorRef's use callingthreadispatcher by default.

@Horusiath unfortunately breaks any ReceiveAsync on that thread

Bartosz Sypytkowski

@Horusiath

can you setup an issue on that?

Thomas Tomanek

@thomastomanek

#2491 :)

Bartosz Sypytkowski

@Horusiath

Caleb Vear

@caleb-vear

I've been trying to figure out where the best place to do some initialisation is. PreStart seems like the logical place, but I'm having a little trouble finding in the docs how exceptions there are handled. My actor is managing an external connection which may fail if for some reason the remote host is unavailable.

It seems like trying to connect inside of the message handler might be better as then my actor will automatically be restarted.

I'm pretty new to Akka.net so I'm not quite sure what the best option is. If I go with doing it in a message handler is it considered acceptable practice for me to publish a message to Self from the PreStart method?

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