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Notification Service

The notification service provides the bounded context Notification. It is responsible for managing notifications.

Domain Model​

info

Imported entities from other bounded contexts are marked with a dashed border.

API​

The service provides a GraphQL API, which is documented in the GraphQL API documentation.

Technology Stack​

  • Language: Kotlin
  • Framework: Spring Boot
  • GraphQL Library: GraphQL Kotlin
  • Database: PostgreSQL
  • Schema Management: Flyway

Repository Structure​

The repository is structured as follows:

  • /src/main/: Source code of the service
    • kotlin/org/misarch/notification/: Kotlin source code
      • event/: Dapr event handling
        • model/: Event DTOs
      • graphql/: GraphQL API
        • dataloader/: Data loaders for efficient data fetching
        • federation/: Apollo Federation entity resolvers
        • input/: Input types for mutations
        • model/: GraphQL types
          • connection/: Connection types and logic for paginated queries
      • persistance/: Database entities and repositories
        • model/: R2DBC entities
        • repository/: Spring Data R2DBC repositories
      • service/: Service logic
    • resources/: Spring Boot application configuration and SQL schema migration files
      • db/migration/: Flyway SQL schema migration files

Defined Events​

This section lists events that are defined by the notification service and can be used by other services.

Published Defined Events​

n/a

Subscribed Defined Events​

notification/notification/create​

Other services can publish this event to create new notifications.

{
  title: string,
  body: string,
  userId: boolean
}

Imported Events​

This section lists events defined by other services that are used by the notification service.

Published Imported Events​

n/a

Subscribed Imported Events​

  • user/user/created: Used to validate that only existing users can receive notifications

Important ADRs​

n/a