Introduction to Our Functional Core

A walkthrough of what our functional core is and how we'll go about making it.

We'll cover the following

The functional core
Defining our core
What our core does
Pure functions in functional cores

The functional core

In this chapter, we’ll dive into the functional core, sometimes called the business logic of our component. Functional-core is the F for fun in "Do fun things with big loud worker-bees.” In the previous chapter, we worked with data. We carved our project into hollow modules holding structs that form our data skeleton. This chapter will fill those empty modules up with functions, each logically addressing a part of the whole functional core. The following figure shows where this core fits:

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Building Our Project in Layers

Knowing Our Elixir Datatypes

Starting With the Right Data Layer

Building Our Functional Core

Testing Our Core

Isolating Process Machinery in a Boundary

Customizing Our Lifecycle

Invoking Our Workers

Assembling Our Components

Testing the Boundary

Introduction to Our Functional Core

The functional core