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Patterns & Practices in EAF

This guide consolidates proven patterns and best practices for developing services within the ACCI EAF ecosystem.

🎯 Core Patterns​

Essential patterns that form the foundation of EAF development.

Aggregate Pattern​

Aggregates encapsulate business rules and maintain consistency boundaries.

Repository Pattern​

Repositories provide clean abstractions for data access.

Factory Pattern​

Factories handle complex object creation logic.

Strategy Pattern​

Strategies enable flexible algorithm selection.

🏗️ Architectural Practices​

Service Boundaries​

Define clear service boundaries aligned with business capabilities.

Event Design​

Design events for evolution and backward compatibility.

Configuration Management​

Externalize configuration for different environments.

Error Handling​

Implement consistent error handling across all layers.

🧪 Testing Practices​

Test Pyramid​

Follow the test pyramid with appropriate test distribution.

Test Isolation​

Ensure tests are isolated and deterministic.

Test Data Management​

Use builders and factories for test data creation.

📊 Performance Patterns​

Caching Strategies​

Implement appropriate caching at different layers.

Async Processing​

Use asynchronous processing for non-blocking operations.

Database Optimization​

Optimize database queries and indexing strategies.

🔒 Security Practices​

Authentication & Authorization​

Implement consistent security patterns across services.

Input Validation​

Validate all inputs at service boundaries.

Audit Logging​

Maintain comprehensive audit trails.

🔗 Integration Patterns​

Circuit Breaker​

Implement circuit breakers for external service calls.

Retry Policies​

Define consistent retry strategies.

Bulkhead Pattern​

Isolate critical resources.

These patterns and practices ensure consistency and quality across the EAF ecosystem.