Apex Class - Call Salesforce Internal API (SOQL + DML) - Salesforce-apex Typing CST Test

Primary Use Cases

• ▸Trigger-based automation for complex business rules
• ▸Custom REST/SOAP services for integrations
• ▸Batch and async processing for high-volume data jobs
• ▸Custom Lightning Web Component (LWC) backend controllers
• ▸Transactional orchestration and advanced validation logic

Notable Features

• ▸Java-like syntax with Salesforce-specific data types and SObjects
• ▸Trigger framework support for scalable event handling
• ▸Built-in test framework with mandatory code coverage
• ▸Async processing: Queueable, Batchable, Future, Scheduled
• ▸First-class integration support (REST, SOAP callouts)

Origin & Creator

Created by Salesforce to allow controlled, secure server-side programming on the CRM platform, evolving since 2006 alongside the Force.com ecosystem.

Industrial Note

Large enterprises rely heavily on Apex to implement governed workflows, ERP-like processes, and integrations across distributed systems.

Quick Explain

• ▸Apex extends point-and-click Salesforce capabilities with programmatic logic.
• ▸It supports triggers, async jobs, web services, complex validations, and transaction control.
• ▸Runs inside the Salesforce multi-tenant environment with strict governor limits.
• ▸Often combined with declarative tools (Flows, Process Builder) to implement robust enterprise logic.
• ▸Core to developing scalable, enterprise-grade applications on Salesforce.

Core Features

• ▸DML and SOQL for data access
• ▸Triggers to handle record lifecycle events
• ▸Apex classes for reusable business logic
• ▸Governor limit enforcement for multi-tenant safety
• ▸Apex Tests and mock callouts for integration validation

Learning Path

• ▸Master SOQL, DML, SObject basics
• ▸Learn triggers and bulkification
• ▸Practice writing and mocking tests
• ▸Build async logic: Queueable, Batch, Scheduled
• ▸Create REST APIs and integration patterns

Practical Examples

• ▸Auto-assigning Leads based on weighted scoring rules
• ▸Bulk invoice creation using Batch Apex
• ▸Custom REST endpoint consumed by external ERP
• ▸Queueable job that syncs high-volume opportunity updates
• ▸Trigger framework enforcing global validation rules

Comparisons

• ▸Apex vs Flows: Apex for complex logic; Flows for rapid development
• ▸Apex vs LWC JS: Apex is server-side; LWC JS is client-side UI logic
• ▸Apex vs Java: Apex runs inside Salesforce with strict limits
• ▸Apex vs External Microservices: Apex handles CRM logic, microservices handle heavy compute
• ▸Apex vs Triggers-only: Apex classes enable better abstraction and scaling

Strengths

• ▸Fully native to Salesforce - high performance and strong ecosystem integration
• ▸Transaction-safe with rollback and savepoint APIs
• ▸Enterprise-ready integration patterns supported out-of-the-box
• ▸Strong metadata-driven development experience
• ▸Pairs well with declarative automation for hybrid workflows

Limitations

• ▸Governor limits require careful design and optimization
• ▸Cannot interact directly with external systems without callouts
• ▸Multi-tenant architecture restricts unrestricted resource use
• ▸Debugging large-scale automation requires strong logging discipline
• ▸Deployment requires test success - higher initial development overhead

When NOT to Use

• ▸When declarative automation (Flow) can fully handle logic
• ▸For heavy ETL jobs better handled externally
• ▸Operations that exceed synchronous governor limits
• ▸Building large-scale UI logic better suited for LWC
• ▸For complex reporting better suited to Analytics/BI tools

Cheat Sheet

• ▸Always bulkify triggers
• ▸Use SOQL limits: 100 queries per transaction
• ▸Use @testSetup for reusable test data
• ▸Prefer Queueable over Future
• ▸Check CRUD/FLS with Security.stripInaccessible

FAQ

• ▸Is Apex required? -> For complex logic, yes.
• ▸Can Apex bypass limits? -> No; limits enforce multi-tenancy.
• ▸Do Flows replace Apex? -> For simple use cases only.
• ▸Can Apex call external APIs? -> Yes via callouts.
• ▸Is 75% test coverage mandatory? -> Yes for deployment.

30-Day Skill Plan

• ▸Week 1: Apex fundamentals, SOQL/SOSL
• ▸Week 2: Triggers and frameworks
• ▸Week 3: Async Apex and callouts
• ▸Week 4: LWC + Apex controllers
• ▸Week 5: Packaging, CI/CD, and performance tuning

Final Summary

• ▸Apex is Salesforce’s server-side language for enterprise automation.
• ▸Requires careful design due to governor limits and multi-tenancy.
• ▸Combines strongly with declarative tools for hybrid solutions.
• ▸Ideal for complex integrations, validations, and async jobs.
• ▸Strong testing and CI/CD practices are key to success.

Project Structure

• ▸force-app/main/default/classes - Apex classes
• ▸force-app/main/default/triggers - Trigger files
• ▸force-app/main/default/lwc - Lightning Web Components
• ▸config/ - Org configuration and scratch org definitions
• ▸tests/ - Apex Test Classes

Monetization

• ▸Apex developers in high demand for enterprise Salesforce work
• ▸Consulting firms leverage Apex for custom CRM/ERP transformations
• ▸Independent ISVs monetize managed packages
• ▸Training and certification opportunities
• ▸Plugins, accelerators, and frameworks sold commercially

Productivity Tips

• ▸Use trigger frameworks (e.g., TDTM, fflib)
• ▸Use VS Code snippets
• ▸Create reusable utility classes
• ▸Follow consistent naming conventions
• ▸Test early and automate CI/CD

Basic Concepts

• ▸SObject - Salesforce data model entity
• ▸Trigger - Automatically executed logic tied to DML events
• ▸DML - Data Manipulation Language for insert/update/upsert
• ▸SOQL - Salesforce Object Query Language
• ▸Governor Limits - Runtime constraints per transaction

Official Docs

• ▸https://developer.salesforce.com/docs/
• ▸Salesforce Apex Developer Guide
• ▸Salesforce Lightning Platform API documentation