Below is an example of an Architecture Diagram for our event-driven reservation system, illustrating a microservices architecture. It highlights the relationships between components, external systems, and underlying patterns used.
Breakdown of the Diagram
External Clients:
- Customer Frontend: Allows users to create, cancel, or manage reservations.
- Administrator Panel: Enables administrators to manage resources and oversee the system.
Gateway Layer:
- The API Gateway handles routing, authentication, and security. It forwards requests to the appropriate microservices in the service layer.
Service Layer:
- Reservation Service: Handles booking logic and validates reservations.
- Resource Service: Provides data about available resources.
- Notification Service: Manages notifications sent to customers about bookings or cancellations.
- Payment Service: Processes payment transactions for confirmed reservations.
Event Handling Layer:
- The Wolverine Event Bus manages asynchronous communication between microservices and external systems, enabling decoupled processing and scalability.
Data Layer:
- Reservations Database: Stores reservation records.
- Resources Database: Holds information about resources available for booking.
- Customers Database: Maintains customer profiles and contact details.
External Services:
- Third-Party Notification System: Sends notifications via email, SMS, or other channels.
- Third-Party Payment Gateway: Secures and processes payments for reservations.
Design Choices:
- Microservices Architecture: Each service is independent, enabling modular development, scalability, and fault isolation.
- Event-Driven Communication: Wolverine Event Bus decouples services, allowing asynchronous workflows and improving responsiveness.
- Data Layer Separation: Different databases ensure focused, efficient querying and easier scalability for each dataset.
- Gateway Layer: Centralized access management ensures secure and seamless interaction with clients.