advanced-architecture

name	advanced-architecture
description	Implementation of Enterprise patterns: CQRS, Event Sourcing, Domain-Driven Design (DDD).

Advanced Architecture (The Enterprise Core 🏢)

For when MVC is not enough.

Patterns

1. DDD (Domain-Driven Design)

• Aggregates: Cluster of objects treated as a unit (e.g., Order + OrderLines).
• Value Objects: Objects defined by attributes, not ID (e.g., Money, EmailAddress). Immutability is key.
• Bounded Contexts: Sales context vs Inventory context. Do not share models directly.

2. CQRS (Command Query Responsibility Segregation)

• Write Side: CreateInvoiceCommand -> invoices table.
• Read Side: InvoiceReadModel (Optimized JSON column or separate ElasticSearch index).
• Benefit: Read performance does not block Write complexity.

3. Event-Driven

• Domain Events: OrderPlaced (Past Tense).
• Listeners: SendEmail, UpdateInventory, NotifySlack.
• Decoupling: The Order Service doesn't know about Slack.