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Learning Scala Programming

You're reading from   Learning Scala Programming Object-oriented programming meets functional reactive to create Scalable and Concurrent programs

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Product type Paperback
Published in Jan 2018
Publisher Packt
ISBN-13 9781788392822
Length 426 pages
Edition 1st Edition
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Author (1):
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Vikash Sharma Vikash Sharma
Author Profile Icon Vikash Sharma
Vikash Sharma
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Table of Contents (16) Chapters Close

1. Getting Started with Scala Programming FREE CHAPTER 2. Building Blocks of Scala 3. Shaping our Scala Program 4. Giving Meaning to Programs with Functions 5. Getting Familiar with Scala Collections 6. Object-Oriented Scala Basics 7. Next Steps in Object-Oriented Scala 8. More on Functions 9. Using Powerful Functional Constructs 10. Advanced Functional Programming 11. Working with Implicits and Exceptions 12. Introduction to Akka 13. Concurrent Programming in Scala 14. Programming with Reactive Extensions 15. Testing in Scala 16. Other Books You May Enjoy

Selecting existing actorRefs via actorSelection

Due to every actor having its own unique ID, we can refer to a particular actor via its path using the actorSelection method. We can call the actorSelection method on system or context and get the ActorRef.

When we call actorSelection on system, we need to pass the absolute Actor path starting from root, whereas while calling the same on context, we can pass the path relative to the current Actor.

Assuming the current Actor (first-level Actor) has a SiblingActor, at the same level, we may refer to the sibling Actor's actor reference as:

context.actorSelection("../siblingActor") 
 
context.actorSelection("/user/siblingActor") 

In these two approaches, the first one used to represent the parent Actor. The other approach directly referred to the Actor's path. With this, we were able to get...

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