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

Testing Apex REST code

To test Apex REST services, we must explicitly set RestRequest for the RestContext.request property that the methods will be using. Testing Apex REST methods is actually a very straightforward process in Apex as they are static methods that are globally scoped. For us to test the doGet method, we will need to first update the HospitalWrapper class to allow the test to view the Name and Ref_Code properties by annotating them with @TestVisible, as shown in the following snippet:

global class HospitalWrapper {
    @TestVisible
    String Name;
    @TestVisible
    String Ref_Code;
    public HospitalWrapper(Account acc) {
        if(acc != null) {
            this.Name = acc.Name;
            this.Ref_Code...