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

Governor limits and why we should embrace them

We are not going to list all the various governor limits in this section, as there is little value in this and Salesforce provides an easily accessible list in the Apex developers guide, which is regularly updated. We are, however, going to discuss what governor limits are in principle and why we should embrace them.

Salesforce governor limits are thresholds that restrict developers from monopolizing resources in a way that would detriment the performance of the Salesforce application for all users of the platform. Each governor limit imposes a maximum available utilization for each tenant to ensure that the operations of one tenant do not adversely affect the other tenants. For example, take the limit for the number of queries in a transaction. When working with any platform, database tuning and query performance are key areas of concern to ensure that an application can grow and scale effectively.

Salesforce enforces a limit on...