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Mastering Elixir

Mastering Elixir

By : Albuquerque, Caixinha
4 (2)
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Mastering Elixir

Mastering Elixir

4 (2)
By: Albuquerque, Caixinha

Overview of this book

Running concurrent, fault-tolerant applications that scale is a very demanding responsibility. After learning the abstractions that Elixir gives us, developers are able to build such applications with inconceivable low effort. There is a big gap between playing around with Elixir and running it in production, serving live requests. This book will help you fll this gap by going into detail on several aspects of how Elixir works and showing concrete examples of how to apply the concepts learned to a fully ?edged application. In this book, you will learn how to build a rock-solid application, beginning by using Mix to create a new project. Then you will learn how the use of Erlang's OTP, along with the Elixir abstractions that run on top of it (such as GenServer and GenStage), that allow you to build applications that are easy to parallelize and distribute. You will also master supervisors (and supervision trees), and comprehend how they are the basis for building fault-tolerant applications. Then you will use Phoenix to create a web interface for your application. Upon fnishing implementation, you will learn how to take your application to the cloud, using Kubernetes to automatically deploy, scale, and manage it. Last, but not least, you will keep your peace of mind by learning how to thoroughly test and then monitor your application.
Table of Contents (13 chapters)
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5
Demand-Driven Processing

Persisting Data Using Ecto

Given the data storage nature of the application we're developing, it's crucial to ensure the persistence of all the media information stored in ElixirDrip works properly. To accomplish this, we will use PostgreSQL as our database, and Ecto as a tool that easily lets us interact with the database and access our application data.

As you will see, working with a database in Elixir is a joy, thanks to the well-crafted abstractions that make our code more expressive while, at the same time, ensuring the required performance in all the data-access operations.

A distinct feature of Ecto is that it never tries to hide the database from you or force you to use its abstractions. You have total flexibility, meaning that you can always overcome the abstraction layer by directly issuing SQL statements from your Elixir application, and Ecto will happily...

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