Below is a Mermaid sequence diagram that showcases how components of our event-based reservation system interact during a typical workflow. This example outlines the process of a customer creating a reservation and includes key components such as the frontend, service layer, Wolverine event bus, and external systems.

Explanation of the Workflow

  1. Customer Interaction:

    • The customer initiates the workflow by sending a request through the Frontend to create a reservation.

  2. Frontend to Service Layer:

    • The frontend sends the reservation details to the Reservation Service for processing.

  3. Resource Availability Check:

    • The Reservation Service queries the Resource Catalog to ensure that the requested resource is available for the given time.

  4. Processing Reservation:

    • Once availability is confirmed, the Reservation Service validates the request, creates the reservation, and generates a ReservationCreated event.

  5. Event Publication:

    • The Wolverine Event Bus publishes the ReservationCreated event to notify downstream services, such as the Notification Service.

  6. Confirmation Notification:

    • The Notification Service sends a confirmation message (e.g., email or SMS) to the customer.

  7. Response to Customer:

    • The Frontend informs the customer that the reservation was successfully created, completing the workflow.

This sequence diagram visualizes the interaction timeline and highlights the asynchronous nature of the event publication through the Wolverine Event Bus. Let me know if you’d like to tweak the diagram for a different workflow (e.g., cancellation flow) or add more details like error handling!

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