Real-World Apex Best Practices
What Does “Production-Ready Apex” Mean?
Short Description
Production-ready Apex is code that:
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Works correctly at scale
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Handles errors safely
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Respects security & governor limits
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Is easy to test, debug, and maintain
Simple Explanation
Production-ready code is not just “working code”—it’s safe code.
Gist (Quick Revision)
Production Apex must be secure, scalable, and maintainable.
1. Production-Ready Coding
Key Principles
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Bulk-safe by default
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No hardcoding
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Clear structure & naming
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Strong error handling
Real-World Example
Processing 1 record vs 200 records must behave the same way.
Example: Production-Ready Pattern
public class AccountService {
public static void updateRatings(List<Account> accounts) {
for (Account acc : accounts) {
acc.Rating = 'Hot';
}
update accounts;
}
}
Why this is production-ready
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Bulkified
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Single DML
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Reusable logic
Gist (Quick Revision)
Write Apex assuming maximum data volume and real users.
2. Common Apex Mistakes (Avoid These)
❌ Mistake 1: SOQL or DML Inside Loops
// Causes governor limit errors
❌ Mistake 2: Hardcoding Values
Decimal tax = 0.15; // bad
Use Custom Metadata instead.
❌ Mistake 3: Ignoring Security
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No CRUD/FLS checks
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Using
without sharingblindly
❌ Mistake 4: Fat Triggers
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Business logic inside triggers
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No handler framework
❌ Mistake 5: Writing Tests Only for Coverage
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No assertions
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No negative testing
Gist (Quick Revision)
Most Apex failures come from limits, security, and poor structure.
3. Scalability Considerations
What Is Scalability?
Scalability means your code works:
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Today with 100 records
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Tomorrow with 1 million records
Scalability Best Practices
1. Bulkify Everything
Always assume triggers receive lists, not single records.
2. Use Async Apex
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Queueable
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Batch
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Scheduled jobs
System.enqueueJob(new LargeDataProcessor());
3. Reduce Repeated Work
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Cache reusable data
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Reuse query results
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Avoid recalculation
4. Design for Change
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Service layer
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Custom Metadata
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Configuration-driven logic
Real-Life Example
Instead of recalculating discounts per record:
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Calculate once
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Reuse value
Gist (Quick Revision)
Scalable Apex minimizes work and spreads heavy processing safely.
? Career Coach Advice (Interview-Ready)
Interviewers love this question:
“How do you ensure Apex is production-ready?”
Strong answer:
“I bulkify all logic, avoid hardcoding, enforce security, use async processing for scale, and follow clean architecture patterns.”
That response signals real-world Salesforce experience.
✅ Final Takeaway
Great Apex developers think beyond the happy path.
Production-ready Apex anticipates failures, scale, and change.
