Software Layers

Handler

• HTTP Domain

• All error and success codes

• API payload validation

• Calls a service or a model function

Service

• Orchestration between services and the domain model

  • Database session

  • External APIs

  • Cloud Services (such as RabbitMQ or S3)

Model

• Domain logic

• Accesses repositories

• Allowances

  • We allow HTTP 404 errors to be thrown from within the model as a convenience for now

Repository

• Accesses the database, performs CRUD operations

• One repository for each database table in RDMS