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Force.com Enterprise Architecture

You're reading from   Force.com Enterprise Architecture Architect and deliver packaged Force.com applications that cater to enterprise business needs

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781786463685
Length 504 pages
Edition 2nd Edition
Languages
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Author (1):
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Andrew Fawcett Andrew Fawcett
Author Profile Icon Andrew Fawcett
Andrew Fawcett
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Toc

Table of Contents (15) Chapters Close

Preface 1. Building, Publishing, and Supporting Your Application FREE CHAPTER 2. Leveraging Platform Features 3. Application Storage 4. Apex Execution and Separation of Concerns 5. Application Service Layer 6. Application Domain Layer 7. Application Selector Layer 8. User Interface 9. Lightning 10. Providing Integration and Extensibility 11. Asynchronous Processing and Big Data Volumes 12. Unit Testing 13. Source Control and Continuous Integration Index

Introducing the Selector factory


The last chapter introduced the concept of a Domain factory, which was used to dynamically construct Domain class instances implementing a common Apex Interface in order to implement the compliance framework.

The following code is used in the ComplianceService.verify method's implementation, making no reference at all to a Selector class to query the records needed to construct the applicable Domain class:

fflib_SObjectDomain domain =
  Application.Domain.newInstance(recordIds);

So, how did the Domain factory retrieve the records in order to pass them to the underlying Domain class constructor? The answer is that it internally used another factory implementation called the Selector factory.

As with the Domain factory, the Selector factory resides within the Application class as a static instance, exposed via the Selector static class member, as follows:

public class Application 
{
  // Configure and create the SelectorFactory for this Application
  public static...
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