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Questions tagged [akka-actor]

134 questions
11
votes
1 answer

Is an ActorRef updated when the associated Actor is restarted by the supervisor?

If I create an logging actor like so val logger: ActorRef = actorSystem.actorOf(Props(new Logger())) and the logger restarts due to an Exception, my logger stops writing to disk. I had been sending messages logger ! msg Am I correct in assuming…
kliew
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8
votes
2 answers

How to use akka in Scala 3?

How to use akka in Scala 3 ? I can't find akka dependencies while using scala 3 sbt errors : [error] not found: /Users/admin/.ivy2/localcom.typesafe.akka/akka-actor-typed_3/2.6.15/ivys/ivy.xml [error] not found:…
Ji Shuai
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6
votes
1 answer

How to meaningful document an actor design

I'm pretty new to akka/actor systems and try to understand code which a colleague has written. Doing this, I ask myself what kind of documentation would be helpful to get a faster understanding of the implemented "actor system". As far as i…
Hansjoerg Wingeier
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5
votes
1 answer

this vs self inside akka actor class

Let's say I have a very simple actor class which receives any message and prints to the console. class SimpleActor extends Actor{ def receive: Receive = { case message => println(s"[${this}][${self}] received message:…
Manoj Sehrawat
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4
votes
1 answer

Find actor by persistence id

I have a system, that has an actor per user. Users send messages rarely, but when they do, they send usually not only one, but few. Currently, I have a map, where I store persistenceId -> ActorRef. When I'm receiving a new message for an actor, I…
psisoyev
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4
votes
1 answer

Custom SupervisorStrategy for Akka System Guardian

According to the Akka docs on the System Guardian, if a top-level actor throws an Exception, it will be restarted indefinitely (with 2 exceptions - no pun intended). My actor system has 1 and only 1 top-level actor: Initializer. If Initializer…
smeeb
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3
votes
0 answers

Is there a way to use Akka Stash over Priority Mailbox?

In an Akka Actor application, I have to postpone receiving certain types of messages after receiving a Control Message. For the sake of control messages, I had to implement my own priority Mailbox that prioritizes Control messages over ordinary…
13leak
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3
votes
1 answer

How can I resolve conflicting actor systems while testing akka-http and akka actors at the same spec file?

I have a Route defined using akka-http that uses an actor inside to send messages. My route looks like this: path("entity") { post { entity(as[Enrtity]) { entity => val result: Future[Message] =…
Esildor
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3
votes
3 answers

Akka Actors: ask pattern vs Promise

Lately I've found myself wrapping actors in classes so that I get back a little of the typesafety I lose when dealing with ActorRefs. The problem is, at the end, that not only I need to send a specific message, I also need to cast the response to…
caeus
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3
votes
0 answers

Integrating streaming events from eventstore with akka actors using akka streams in Java

I am working with GetEventStore as the journal provider for the events persisted by akka-persistence and accessing the akka.persistence.query.javadsl to query the events from eventstore. The actor system and the journal provider is configured using…
smartinsert
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3
votes
2 answers

mapMaterializedValue doing nothing with Source.actorRef

I am trying to send message to actor bindet with Source.actorRef, but this part of code: println(s"Before mapping $src") src.mapMaterializedValue { ref => println(s"Mapping $ref") ref ! letter.text } println(s"After mapping $src") is printing…
Sasha
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3
votes
3 answers

How to get load file under resources folder in scala sbt

I am having a akka actors config file under resources, src/main/resources/remote_app.conf src/main/scala/actors/Notification.scala I am loading the resources as below, 1. val configFile =…
PGS
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2
votes
1 answer

Build and Run Akka with Scala 3+

I'm trying to build and run a project using Akka and Scala 3+ but I encounter a lot of errors. My build.sbt looks like name := "akka" version := "0.1" scalaVersion := "3.1.1-RC1" //…
user3476509
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2
votes
0 answers

play framework ActorFlow with backpressure

Current play framework implementation for flow implementation for an actor class is written without back-pressure. I would like to implement with back-pressure replacing actorRef with actorRefWithAck. But the actor flow is written in Scala, which…
sasankad
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2
votes
1 answer

Get the chosen actor in a RoundRobinPool?

If I had a RoundRobinPool like this val actorPoolRef = AkkaConfig.actorSystem.actorOf(RoundRobinPool(100).props(Props[MyService])) and a handler def requestHandler(request: HttpRequest): Future[HttpResponse] = { val promise =…
edg
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