Book Image

Mastering Apex Programming

By : Paul Battisson
5 (1)
Book Image

Mastering Apex Programming

5 (1)
By: Paul Battisson

Overview of this book

As applications built on the Salesforce platform are now a key part of many organizations, developers are shifting focus to Apex, Salesforce’s proprietary programming language. As a Salesforce developer, it is important to understand the range of tools at your disposal, how and when to use them, and best practices for working with Apex. Mastering Apex Programming will help you explore the advanced features of Apex programming and guide you in delivering robust solutions that scale. This book starts by taking you through common Apex mistakes, debugging, exception handling, and testing. You'll then discover different asynchronous Apex programming options and develop custom Apex REST web services. The book shows you how to define and utilize Batch Apex, Queueable Apex, and Scheduled Apex using common scenarios before teaching you how to define, publish, and consume platform events and RESTful endpoints with Apex. Finally, you'll learn how to profile and improve the performance of your Apex application, including architecture trade-offs. With code examples used to facilitate discussion throughout, by the end of the book, you'll have developed the skills needed to build robust and scalable applications in Apex.
Table of Contents (21 chapters)
1
Section 1 – Triggers, Testing, and Security
8
Section 2 – Asynchronous Apex and Apex REST
15
Section 3 – Apex Performance

Prevention is better than a cure

All problems are best dealt with before they actually occur and become a problem. This may sound overly simplistic or even stupid, but it is extremely true when it comes to software development. Bugs cause side effects, both on data by inhibiting it from moving through its intended life cycle, and on the reputation of the system and its developers. Anything we can do to avoid a bug being found in the wild will help us to limit and mitigate this. We won't stop all bugs, but any bugs we can stop will be a help.

The first thing I wish to advocate, therefore, is extremely thorough Apex testing. Some of you may have just groaned audibly, but I will ask you to bear with me while I explain why for me this is the first step in debugging. And if you know and have taken a Test-Driven Development (TDD) approach here, you may just be laughing.

Firstly, tests can assist in pre-empting bugs. We will discuss in Chapter 5, Testing Apex Code, why testing...