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BASEL BERN BRUGG DÜSSELDORF FRANKFURT A.M. FREIBURG I.BR. GENF
HAMBURG KOPENHAGEN LAUSANNE MÜNCHEN STUTTGART WIEN ZÜRICH
Akka.NETScalable, distributed, parallel and fault tolerant.
Trivadis Late Lounge, 18.02.2016
Manuel Meyer, ZH-AD
Agenda
1. Erlang
2. Akka
3. Actor Model
4. Akka.NET Principles
Erlang
Erlang
–Parallel
–Highly Available
–Fault-Tolerant
–Hot-Pluggable
–> COPL
–> Build MSSRTS.
Erlang
Prolog
Smalltalk
PLEX
F#
Clojure
Rust
Scala
Opa
Reia
Elixir
Dart
Akka
Erlang QuickSort
Erlang Ping-Pong
Erlang Users
CouchDB
RabbitMQ
SimpleDB (AWS)
Cowboy, Ranch, Bullet, Sheriff
ejabberd
Akka
Akka.NET
Akka.NET
Actor Model
Actor Model
Dr. Carl Hewitt (MIT) 1973
Mathematical Model of concurrent computation
„in the prospect of highly parallel computing machines with thousands of processors“
Great fit for:– Cloud– Internet– Mobile– IoT– Reactive– Everything
Actor Model
Actor Model
Actor Model
Actor = (Computation, Storage, Communication)
Akka Principles
Akka Principals
Everything is an Actor/Shared Nothing/Lightweight Actors
Distributed by Default/Divide and Conquer
Fault Tolerance/Supervision/Error-Kernel Pattern
Loose Coupling/Location Transparency/Dynamics
Akka Principals
Everything is an Actor/Shared Nothing/Lightweight Actors
Distributed by Default/Divide and Conquer
Fault Tolerance/Supervision/Error-Kernel Pattern
Loose Coupling/Location Transparency/Dynamics
Everything is an Actor/Shared Nothing/Lightweight Actors
Actor System
Actors (UntypedActor, ReceiveActor)
Props
Factories
Messages (POCO).
ActorSystem.Create("MyActorSystem");
Everything is an Actor/Shared Nothing/Lightweight Actors
3 Mio Actors per GB of RAM
Passive Actors.
Akka Principals
Everything is an Actor/Shared Nothing/Lightweight Actors
Distributed by Default/Divide and Conquer
Fault Tolerance/Supervision/Error-Kernel Pattern
Loose Coupling/Location Transparency/Dynamics
Distributed by Default/Divide and Conquer
1. Take a lot of work
2. Break it down until it is easy to deal with
3. Respond as needed.
Akka Principals
Everything is an Actor/Shared Nothing/Lightweight Actors
Distributed by Default/Divide and Conquer
Fault Tolerance/Supervision/Error-Kernel Pattern
Loose Coupling/Location Transparency/Dynamics
Fault Tolerance/Supervision/Error-Kernel Pattern
Fault Tolerance/Supervision/Error-Kernel Pattern
Fault Tolerance/Supervision/Error-Kernel Pattern
1. Error in child1
2. Child1 is suspended
3. System sends a Failure msg to Parent1 with exception
4. Parent1 issues a directive to Child1 telling it what to do.
5. Life goes on
Directives: Restart, Stop, Escalate, Resume (ignore)
Strategies: One-for-One, All-for-One, NumberOfRetries.
Akka Principals
Everything is an Actor/Shared Nothing/Lightweight Actors
Distributed by Default/Divide and Conquer
Fault Tolerance/Supervision/Error-Kernel Pattern
Loose Coupling/Location Transparency/Dynamics
Loose Coupling/Location Transparency/Dynamics
IActorReference
ActorPath:
akka.tcp://MyActorSystem@LTMME:9001/user/actorName1
Loose Coupling/Location Transparency/Dynamics
HOCON: Human-Optimized Config Object Notation
Demo:
Akka.NET
Resources
Akka.NET
– http://getakka.net
Petabridge Akka.NET Bootcamp
– https://petabridge.com/bootcamp/
Pluralsight (www.pluralsight.com)
– Akka.NET Fundamentals
– Stateful Reactive Concurrent SPAs with SignalR and Akka.NET
– Improving Message Throughput in Akka.NET
– Concurrent WPF Applications with Akka.NET
Agenda
1. Erlang
2. Akka
3. Actor Model
4. Akka.NET
Thank you!Manuel [email protected]
