In this second episode of the SOLID Design Principles Tutorial Series we go over what the Single Responsibility Principle is and how we can actually leverage it in both Apex and JavaScript. Click play! Do it bruh! Get Coding With The Force Merch!! We now have a redbubble store setup so you can buy cool…
If you’re here, you had better be ready to learn some of the most amazing concepts that the developers that came before you and I put together. The SOLID principles are some of the most important software design principles in existence, and if you want to produce some truly excellent and flexible code THIS IS…
What are Data Attributes and Why Should I Use Them? Data attributes are a truly magical thing that will, at some point, get you out of some prickly situations as a front end developer. They are essentially a way of storing data on an html element so that when a JS event gets fired your…
What is Apex Mocks? Apex Mocks is unit test mocking framework for Apex that was inspired by the very popular Java Mockito framework. The Apex Mocks framework is also built using Salesforce’s Stub API which is a good thing, there are mocking frameworks in existence that do not leverage the Stub API… you shouldn’t use…
How does Unit Testing fit into Separation of Concerns? The answer to this is simple, without Separation of Concerns, there is no unit testing, it just simply isn’t possible. To unit test you need to be able to create stub (mock) classes to send into your class you are testing via dependency injection (or through…
What is Unit Testing? Unit Testing, is a way to test the logic in one class and ONLY one class at a time. Most classes in your system at some point do one of the following: 1) Call to another class to get some work done. 2) Query the database directly in the class. 3)…
The Template for every Selector Class you create Every Selector layer class you create should at least implement the following methods for it to work as anticipated. The fflib_SObjectSelector Constructor Parameters and what each of them mean When you create a Selector class that extends the fflib_SObjectSelector class you have the option to send some…
What is the Selector Layer The Selector Layer is Salesforce is based off Martin Fowler’s Data Mapper Layer concept. It’s, “a layer of Mappers that moves data between objects and a database while keeping them independent of each other and the Mapper itself”. In most tech stacks when you want to represent records in a…
What is the Builder Pattern? The Builder Pattern is a Creational Design Pattern that allows you to construct a complex object one step at a time. Think about the construction of a car or your house or maybe something less complicated, like the construction of a desktop computer. When you’re creating a new desktop computer…
The template for every Domain Class you create Every Domain layer class you create for an object should at minimum have the following logic in it for it to work as expected. To understand why the Constructor inner class is necessary in these classes check out the triggerHandler method in the fflib_SObjectDomain class here: fflib_SObjectDomain…