Book Image

Scala Design Patterns - Second Edition

By : Ivan Nikolov
Book Image

Scala Design Patterns - Second Edition

By: Ivan Nikolov

Overview of this book

Design patterns make developers’ lives easier by helping them write great software that is easy to maintain, runs efficiently, and is valuable to the company or people concerned. You’ll learn about the various features of Scala and will be able to apply well-known, industry-proven design patterns in your work. The book starts off by focusing on some of the most interesting and latest features of Scala while using practical real-world examples. We will be learning about IDE’s and Aspect Oriented Programming. We will be looking into different components in Scala. We will also cover the popular "Gang of Four" design patterns and show you how to incorporate functional patterns effectively. The book ends with a practical example that demonstrates how the presented material can be combined in real-life applications. You’ll learn the necessary concepts to build enterprise-grade applications. By the end of this book, you’ll have enough knowledge and understanding to quickly assess problems and come up with elegant solutions.
Table of Contents (14 chapters)

The template method design pattern

Sometimes when we implement some algorithm or a family of algorithms, we define a common skeleton. Then later, the different implementations deal with the specifics of each method in the skeleton. The template method design pattern allows us to achieve what we mentioned previously.

The purpose of the template method design pattern is to defer algorithm steps to subclasses using template methods.

The template method design pattern seems really natural to object-oriented programming. Whenever polymorphism is used, this actually represents the design pattern itself. Usually, the template method is implemented using abstract methods.

Example class diagram

The template method design pattern is...