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Mastering Apex Programming

Mastering Apex Programming

By : Paul Battisson
4.9 (12)
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Mastering Apex Programming

Mastering Apex Programming

4.9 (12)
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)
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1
Section 1 – Triggers, Testing, and Security
8
Section 2 – Asynchronous Apex and Apex REST
15
Section 3 – Apex Performance

Testing RESTful web services with static resources

For obvious reasons, Salesforce does not make callouts to external web services when running Apex tests. There is no guarantee an endpoint is defined or available for testing, and the callout would hinder and slow down the running of any unit tests by an order of magnitude.

Because of this, we have to be able to provide mock responses to any web service callouts made within our tests and return the appropriate response for the test to utilize. For those unfamiliar with the terminology, mocking a service simply means providing an implementation to act in its place. In this case, we will be providing a placeholder for the responding endpoint for testing purposes.

Salesforce provides an interface called HttpCalloutMock that a developer can implement as part of their unit testing when handling HyperText Transfer Protocol (HTTP) callouts. Salesforce also provides a couple of standard implementations of this interface to help in...

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