Architecture Patterns¶

Well-Architected Framework¶

Well-Architected Framework

Multi-Tier Architecture¶

Multi-Tier Architecture

Microservices Architecture¶

Microservices Architecture

Event-Driven Architecture¶

Event-Driven Architecture

Event-Driven Implementation¶

// Event Publisher
@Service
public class OrderEventPublisher {

    private final EventBridgeClient eventBridge;

    public void publishOrderCreated(Order order) {
        PutEventsRequestEntry entry = PutEventsRequestEntry.builder()
            .source("order-service")
            .detailType("OrderCreated")
            .detail(toJson(new OrderCreatedEvent(
                order.getId(),
                order.getUserId(),
                order.getTotal(),
                Instant.now()
            )))
            .eventBusName("orders")
            .build();

        eventBridge.putEvents(PutEventsRequest.builder()
            .entries(entry)
            .build());
    }
}

// Event Consumer (Lambda)
public class OrderCreatedHandler implements RequestHandler<ScheduledEvent, Void> {

    @Override
    public Void handleRequest(ScheduledEvent event, Context context) {
        OrderCreatedEvent orderEvent = parseDetail(event.getDetail());

        // Process event
        notificationService.sendOrderConfirmation(orderEvent);
        inventoryService.reserveItems(orderEvent);

        return null;
    }
}