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Modern Web Development with Scala

A concise step-by-step guide to the Scala ecosystem

Denis Kalinin

This book takes a very practical approach to teaching Scala. It begins by showing you just enough basics to get started and then guides you through the process of building a technology-packed real-world Web application using popular backend and frontend technologies. Overall, the book provides a great introduction to the Scala ecosystem.

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About

About

About the Book

In this book, you will learn how to build Web applications with Play Framework, access databases with ScalikeJDBC, perform asynchronous tasks with Scala Futures and Akka Actors, wire dependencies with MacWire, authenticate users with BCrypt, test your code with ScalaTest and ScalaMock. 

The book shows how to use Gradle and SBT for building projects, how to integrate modern frontend tools such as Webpack and React into a Scala developer workflow. A chapter discussing application deployment and hosting considerations is also included.

The book doesn't expect any prior Scala experience as the basics are briefly explained in the first chapters. The required functional programming concepts are also explained in the beginning.

Who this book is for

This book is intended for people who are interested in learning and applying Scala to writing Web applications. It assumes a good knowledge of any programming language and familiarity with Web technologies. 

Which versions are used

The main examples use Scala 2.13 and Play 2.8. When additional libraries are needed, their latest versions are used.

Acknowledgements

The cover illustration was designed by Freepik

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ScalaWeb Development

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Author

About the Author

Denis Kalinin

Having started as a Java developer in a middle-sized enterprise company, over the course of my career I've worked in several different countries and gained quite a bit of experience. During the last eight years I've used a great number of libraries and frameworks from JavaServer Faces to React. 

Contents

Table of Contents

Preface

Before we begin

  1. Setting up your environment
  2. Installing Java Development Kit
  3. Installing Scala
  4. Using REPL
  5. Using IntelliJ IDEA
  6. Using Atom Editor
  7. Using Visual Studio Code
  8. Why use text editors?

Language fundamentals

  1. Defining values
  2. Functional types
  3. Type hierarchy
  4. Collections
  5. Packages and imports
  6. Defining classes
  7. Defining objects
  8. Type parametrization
  9. Collections syntax revisited
  10. Functions and implicits
  11. Implicits and companion objects
  12. Loops and conditionals
  13. String interpolation
  14. Traits

Functional programming

  1. Algebraic data types
  2. Pattern matching
  3. Case classes
  4. Higher-order functions
  5. for comprehensions
  6. Currying
  7. Laziness
  8. Option
  9. Try
  10. Future

Build tools

  1. Command line
  2. Gradle
  3. sbt

Working with Play

  1. The project template
  2. Play templates
  3. Using template parameters
  4. Serving asynchronous results
  5. Adding sunrise and sunset times
  6. Using Java 8 Date and Time API
  7. Adding weather information
  8. Moving logic into services
  9. Injecting dependencies with MacWire
  10. Managing application lifecycle
  11. Intercepting requests with filters
  12. Using Akka

Frontend integration

  1. Setting up nvm
  2. Choosing the versions
  3. package.json
  4. GruntJS and Gulp
  5. Module bundlers
  6. Using EcmaScript 6 with Babel
  7. Explaining React
  8. Separating the frontend
  9. Initializing the frontend project
  10. webpack.config.js explained
  11. Using React
  12. Sending data via JSON
  13. Using Sass with Webpack
  14. Extracting styles

Authenticating users

  1. Installing PostgreSQL
  2. Adding ScalikeJDBC
  3. Storing passwords
  4. Managing database evolutions
  5. Authentication roadmap
  6. The login page
  7. Implementing the authentication service
  8. Using Play Forms API
  9. Showing errors on the page
  10. Restricting access
  11. Testing with ScalaTest

Deployment

  1. Hosting considerations
  2. Preparing the distribution

Closing remarks

Appendix A. Packages

Appendix B. Using IntelliJ IDEA

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