How to migrate to Apex Enterprise
Patterns?
by David Fernandez

#CD22
- Long time developer.
- Some years of experience in
Salesforce ecosystem.
- Artificial Intelligence
enthusiast.
@DfdezR
dfernandezr/
Salesforce Innovation Squad Lead
at Bluez.io

#CD22
● What are Apex Enterprise Patterns?
● Why should I Migrate to Apex Enterprise
Patterns?
● Where to start?
○ Selector Approach
○ Service Approach
○ Domain Approach
● Tips and Study Materials
● Q & A
Agenda

#CD22
● Who, What, When?
● Separation Of Concerns
● DRY
● SOC = Code Reuse?
What are Apex Enterprise Patterns?

#CD22
SELECTOR PATTERN

#CD22
DOMAIN PATTERN

#CD22
SERVICE PATTERN

#CD22
UNIT OF WORK PATTERN

#CD22
● Facilitates collaborative teamwork between developers
● Allows evolution of complexity
● Sets a good ground for scalability
● Less Tests!!!! (When developing new stuff)
● Prepares the implementations to implement new technologies
(Salesforce DX)
Why should I Migrate to Apex Enterprise Patterns?

#CD22
● Do I need AEP?
Where to start?

#CD22
● Realistically evaluate the developers maturity and establish
responsibilities.
● Be aware of the amount of time to dedicate.
● Focus on those pain points to start (Fix, don’t patch).
● Think and implement new functionalities into the change of mind.
What factors I need to successfully migrate?

#CD22
Selector Approach
Domain Approach
Service Approach
Ok I want to migrate, I can do it, but… Where do I start?

#CD22
1. Select object
2. Find ALL query usages
3. Inject selector in usages
4. Start Service implementation
5. Start Domain implementation
6. Controllers
7. Triggers/Batches
Selector Approach

#CD22
1. Select object
2. Create SINGLE trigger
3. Move all trigger functionalities and DML related operations
4. Start Selectors implementation
5. Start Services implementations
6. Controllers
7. Batches
Domain Approach

#CD22
1. Select object
2. Find ALL business usages of object
3. Isolate specific functionalities in specific services
4. Start Selectors implementation
5. Start Domain implementations
6. Triggers/Batches
7. Controllers
Service Approach

#CD22
Q & A

#CD22
- https://trailhead.salesforce.com/en/content/learn/modules/apex_pattern
s_sl
- https://trailhead.salesforce.com/en/content/learn/modules/apex_pattern
s_dsl
- https://andyinthecloud.com/
- https://www.apexhours.com/apex-enterprise-patterns/
- https://quirkyapex.com/
Tips and Study Materials

Thank you! #CD22