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

Summary

In this chapter, we have covered platform events in detail and discussed a number of ways in which we can both publish and consume them. We began the chapter by discussing what is meant by the term event-driven architecture and described how an event bus allows us to both publish and consume events and has an operating model that can be thought of as being analogous to how Twitter operates.

The next section then discussed the key use cases for platform events and how we can use platform events to decouple applications to make them easier to scale and grow. We also discussed how we can connect to external systems in a simpler fashion through the use of platform events.

With our understanding of these use cases in place, we then moved on to how we define a platform event and how a platform event is defined as metadata within Salesforce. We then looked at a number of ways of publishing events through the use of Apex, Process Builder, flows, and the Salesforce REST API....