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

Chapter 10: Scheduling Apex Jobs

In this chapter, we are going to discuss how we can schedule Apex jobs to run at some predetermined point in the future or on a regular basis. All the asynchronous processing options we have seen so far – future methods, Batch Apex, and Queueable Apex – run when resources are available after being invoked in as near to real time as possible (except for scheduled Batch Apex, which we will discuss in more detail later). We invoke our future, batch, or queueable method, and whenever resources are available, Salesforce will process the request and execute our code.

Scheduled Apex jobs, on the other hand (including scheduled batch jobs), execute on or after a desired time is set is by the developer. This could be a single time as a one-off execution (for example, updating a series of records when a new field is added), or on a more regular scheduled basis, based on your use case – for example, nightly integration sync.

In this...