Writing Advance Apex Triggers in Salesforce

1. Path to Code
Begin Your Salesforce Coding Adventure

2. Episode 13
Writing Advanced Triggers in Apex

3. • Enterprise Solutions Architect
• Global Community Speaker
Jigar Shah
@jigarshah189

4. Agenda
• Challenges with Triggers
• Trigger Patterns to the Rescue
• Anatomy of a Trigger Pattern
• Implementing an Advanced Trigger Pattern
• Understanding the Order of Execution
• Q&A

5. Some Housekeeping Rules…
• Mute your mic
• Keep adding questions in Zoom Q&A Window
• No questions are silly!
• Questions will be answered in the last 15 mins of this session

6. General Trigger Implementation
sObject
Trigger 1
Trigger 2

7. Challenges with Triggers
1. Maintenance heavy complex implementations
2. Non deterministic execution sequence for multiple triggers on
same events
3. Recursive execution resulting in Infinite Loops

8. Handler Pattern to the Rescue
Proven design pattern enabling efficient implementation of Apex triggers
to overcome common implementation pitfalls

9. Anatomy of a Handler Pattern
sObject Trigger Handler
Apex Class
Apex Class
Clean Trigger Implementation Controlled Delegation Business Logic & Utility

10. Benefits of Handler Pattern
 Enforces One Trigger Per Object rule to drive maintainability
 Enables clean code
 Promotes code reusability
 Drives deterministic execution sequence of triggers
 Eradicates occurrence of infinite loops

11. Demo 1
Implementing a Trigger Handler Pattern

12. Understanding Order of Execution
Courtesy - http://santanuboral.blogspot.com/

13. Resources
 Apex Triggers
 Triggers & Order of Execution
 Trigger Patterns for Tidy Streamlined Bulkified Triggers (Blog)

14. Trailhead Modules
Apex Triggers

15. Q & A

16. Thank You

17. Subscribe