Backend Internals¶

Example Request Flow¶

The structure of the backend was described in the corresponding Level 2 Building Block View.

This example shows how a simple read request is expected to travel through the layers of the backend application.

sequenceDiagram
    actor User
    participant API as Rest API
    participant Layer as Layer of Indirection
    participant Handler
    participant Infrastructure

    User->>API: GET /api/data
    API->>API: Validate access token
    API->>API: Build Query
    API->>Layer: Send Query
    Layer->>Handler: Route Query to responsible Handler
    Handler->>Handler: Perform any logic
    Handler->>Infrastructure: Query any data
    Infrastructure-->>Handler: data
    Handler-->>Layer: Query Result
    Layer-->>API: Query Result
    API->>API: Build Response
    API-->>User: Response