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  • Book Overview & Buying Scala Design Patterns
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Scala Design Patterns

Scala Design Patterns

By : Ivan Nikolov
4.2 (5)
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Scala Design Patterns

Scala Design Patterns

4.2 (5)
By: Ivan Nikolov

Overview of this book

Scala has become increasingly popular in many different IT sectors. The language is exceptionally feature-rich which helps developers write less code and get faster results. Design patterns make developer’s 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 will learn about the various features of Scala and 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 features of Scala while using practical real-world examples. We will also cover the popular "Gang of Four" design patterns and show you how to incorporate functional patterns effectively. By the end of this book, you will have enough knowledge and understanding to quickly assess problems and come up with elegant solutions.
Table of Contents (14 chapters)
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13
Index

The mediator design pattern


Real-world software projects usually contain a large number of different classes. This helps to distribute complexity and logic so that each class does one specific thing, which is simple, rather than many complex tasks. This, however, requires classes to communicate with each other in some way in order to realize some specific functionality, but then keeping the loose coupling principle in place could become a challenge. The purpose of the mediator design pattern is to:

Note

Define an object that encapsulates how a set of other objects interact with each other in order to promote loose coupling and allow us to vary class interactions independently.

The mediator design pattern defines a specific object called mediator that enables other ones to communicate with each other instead of doing this directly. This reduces dependencies between them, which makes a program easy to change and maintain in the future as well as have it properly tested.

Class diagram

Let's imagine...

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