You're reading from Salesforce Platform Enterprise Architecture- fourth edition A must-read guide to help you architect and deliver packaged applications for enterprise needs

Product type Paperback

Published in Mar 2023

Publisher Packt

ISBN-13 9781804619773

Length 712 pages

Edition 4th Edition

Languages

Java

Tools

Salesforce

Concepts

Solution Architecture

Author (1):

Andrew Fawcett

View More author details

Table of Contents (23) Chapters

Preface

1. Part I: Key Concepts for Application Development

2. Building and Publishing Your Application FREE CHAPTER

3. Leveraging Platform Features

4. Application Storage

5. Apex Execution and Separation of Concerns

6. Part II: Backend Logic Patterns

7. Application Service Layer

8. Application Domain Layer

9. Application Selector Layer

10. Additional Languages, Compute, and Data Services

11. Part III: Developing the Frontend

12. Building User Interfaces

13. User Interfaces and the Lightning Component Framework

14. Part IV: Extending, Scaling, and Testing an Application

15. Providing Integration and Extensibility

16. Asynchronous Processing and Big Data Volumes

17. Unit Testing

18. Source Control and Continuous Integration

19. Integrating with External Services

20. Adding AI with Einstein

21. Other Books You May Enjoy

22. Index

Where is Apex used?

As we have discovered, Apex code can run at any time for a variety of reasons, both in the foreground and background, and governor limits vary accordingly. You can read more about this in Apex Transactions and Governor Limits, from the Apex Developer Guide.

Occasionally, if you have some Apex code that is acting as a library of commonly used code, this code may need to act intelligently depending on the context it’s running in. For example, HTTP callouts are not allowed in Apex Triggers but are in almost all other cases. In order to avoid errors and take mitigating action, code can reference the Quiddity enumeration. The following code can be used to obtain the current enumeration for the request currently being executed.

Quiddity currentType = Request.getCurrent().getQuiddity();

The following table lists the types of execution contexts that Apex code can be run from, their Quiddity enumeration value, and considerations with respect to security...