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Presented By:
Purva Agrawal
Software Consultant
Working With Child
Actors in Akka
Lack of etiquette and manners is a huge turn off.
KnolX Etiquettes
Punctuality
Respect Knolx session timings, you
are requested not to join sessions
after a 5 minutes threshold post
the session start time.
Feedback
Make sure to submit a constructive
feedback for all sessions as it is
very helpful for the presenter.
Mute
Please keep your window on mute
Avoid Disturbance
Avoid leaving your window
unmuted after asking a question
Agenda
01 Introduction to Akka Actors
02 Actor Hierarchy
04 Supervision and Actor Selection
Child Actors
03
Demo
05
Introduction to Akka Actors
● Akka is a toolkit and runtime for building highly concurrent, distributed,
and fault-tolerant message-driven applications on the JVM.
● Akka is written in Scala.
● What is an Actor?
● Message Passing
Actor Hierarchy and
Actor System
● The ActorSystem is a root actor in actor structure.
● It is a hierarchical group of actors which share common configuration, e.g.
dispatchers, deployments, remote capabilities and addresses.
● It is also the entry point for creating or looking up actors.
Actor Path
Creating Parent Actor
Creating Child Actor
Supervision
❏ In case of failure,the parent decides from the below directives :
● Resume: Simply resume message processing.
● Restart: Transparently replace affected actor with new instance and then resume message
processing.
● Stop: Stop affected Actor permanently.
● Escalate: Escalate the failure by failing itself and propagate failure to its parent.
❏ Supervision Strategy
There are two type of supervision strategies to supervise any actor:
1. One-For-One – Only the faulty child is affected when it fails.
2. One-For-All – All children are affected when one child fails.
Actor Selection
● Actor selection is a feature that offers to find actor by path.
● The actor path is used to send the message to that particular actor.
● It is used to locate an actor deeper into the hierarchy.
How to use Actor Selection
DEMO
Thank You !

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Working With Child Actors in Akka

  • 1. Presented By: Purva Agrawal Software Consultant Working With Child Actors in Akka
  • 2. Lack of etiquette and manners is a huge turn off. KnolX Etiquettes Punctuality Respect Knolx session timings, you are requested not to join sessions after a 5 minutes threshold post the session start time. Feedback Make sure to submit a constructive feedback for all sessions as it is very helpful for the presenter. Mute Please keep your window on mute Avoid Disturbance Avoid leaving your window unmuted after asking a question
  • 3. Agenda 01 Introduction to Akka Actors 02 Actor Hierarchy 04 Supervision and Actor Selection Child Actors 03 Demo 05
  • 5. ● Akka is a toolkit and runtime for building highly concurrent, distributed, and fault-tolerant message-driven applications on the JVM. ● Akka is written in Scala. ● What is an Actor? ● Message Passing
  • 7.
  • 8. ● The ActorSystem is a root actor in actor structure. ● It is a hierarchical group of actors which share common configuration, e.g. dispatchers, deployments, remote capabilities and addresses. ● It is also the entry point for creating or looking up actors. Actor Path
  • 11. ❏ In case of failure,the parent decides from the below directives : ● Resume: Simply resume message processing. ● Restart: Transparently replace affected actor with new instance and then resume message processing. ● Stop: Stop affected Actor permanently. ● Escalate: Escalate the failure by failing itself and propagate failure to its parent. ❏ Supervision Strategy There are two type of supervision strategies to supervise any actor: 1. One-For-One – Only the faulty child is affected when it fails. 2. One-For-All – All children are affected when one child fails.
  • 13. ● Actor selection is a feature that offers to find actor by path. ● The actor path is used to send the message to that particular actor. ● It is used to locate an actor deeper into the hierarchy. How to use Actor Selection
  • 14. DEMO