Advanced Scala Training Course

Who should attend

Developers who are already familiar with Scala, who need to understand some of the more advanced features of the language.

Prerequisites

A familiarity with writing and running Scala code, along with topics such as the basics of functional Scala, pattern matching and traits.

Live, instructor-led online and on-site training

This Advanced Scala course is available for private / custom delivery for your team - face-to-face, on-site at your location of choice, or remotely via MS Teams, Zoom or your own platform - get in touch to find out how we can deliver tailored training which focuses on your project requirements and learning goals.

Course Overview

• Welcome and Introductions
• Plan for Course

Value types

• Value Classes and AnyVal
• How to define Value classes
• Limitations of Value Classes
• When to use Value Classes
• Universal Traits
• Universal Traits and Inheritance
• To Trait or Not to Trait

Functional Programming

• What is Functional Programming?
• Characteristics of FP
• Functions as First Class Elements
• Function Objects
• Pure Functions & Referential Transparency
• Promotes Declarative Style
• Preference for Recursion
• Composable Functions
• Data Structures
• Immutability & Transform rather than Mutate

Functional Programming in Scala

• Functions reviewed
• Closures
• Functions and methods
• Tail Recursive Functions
• Partially Applied Functions
• Currying
• Partial Functions
• Lazy Evaluation
• Pass by Value v Pass by Reference

Immutability

• Immutability Pattern
• Arguments for Immutable Objects
• Value Classes and Immutability
• Meter Immutable Value Class
• Immutable Domain Classes
• Why is this Interesting?
• Building an Immutable Invoice

Higher Order Functions and Collections

• Introduction Higher Order Functions
• Functions as Parameters
• Using types for function definitions
• Functions as Return results
• Collection Higher Order Functions
• foreach, map, filter, foldLeft, foldRight, flattern, flatMap
• Working with Streams
• Using LazyLists

Functional Design patterns

• Functors
• Applicative Functors
• Monoids
• Monads
• Foldable
• Zippers
• Lenses

Stackable Traits

• Single Abstract Method Traits
• Stackable traits
• Traits with Stackable Modifications
• Traits and the Strategy Pattern
• Using Traits to implement Strategy

Futures and Promises

• Why Asynchronous Programming
• Futures
• Scala Futures
• Futures and Completion (success and failure)
• Futures and Waiting
• Futures and FP
• Multiple Futures
• Promises
• Scala Promises

Futures and Promises

• Why Asynchronous Programming
• Futures
• Scala Futures
• Futures and Completion (success and failure)
• Futures and Waiting
• Futures and FP
• Multiple Futures
• Promises
• Scala Promises

Actor Lifecycle, Configuration and Dispatchers

• Actor Lifecycle
• Lifecycle Methods
• Property Configuration Factory Pattern
• Passing Parameters to Actor Constructors
• Akka Configuration
• Dispatchers
• Actors and Parallelism
• Using the Thread Pool Dispatcher

Actor Testing with Akka Testkit

• Akka Testing toolkit
• Adding Akka Testkit
• Actor to test
• Testing an Actor
• Provided expect* assertions

Akka Actor Results & Futures

• Returning a Result from an Actor
• Using a Future
• Parent Child Hierarchies
• Root of all Actors
• Supervisor Example

Persistent Actors

• Motivation
• Akka Persistence
• Akka Persistence Architecture
• Persistent Actor
• Configuration of Persistent Actors
• Persistent Actor Application

Overview of Scala 3

Close and Discussion