Logical Layers

Data Service Layer

  • Contains logic for accessing relational database.
  • Contains logic for invalidating cache memory.

Domain Service Layer

  • Responsible for performing transformation from api data model to persistence data model and vice versa.
  • Contains validation logic (typically that requires accessing relational and cached data) for api model and domain objects.
  • Performs other domain related services such as calculations, key generation etc
  • Depends on Data Access Layer

API Controller

  • Serves as a http end point that resides between external consumers (such as admin web) and service layer.
  • Provides field level validation on api data model object
  • Accessible via HTTP Basic authentication
  • Depends on Service Layer

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API Client

  • Provides a mechanism to access restful api as exposed by API Controller.
  • Provides the security mechanism to access secured services as exposed by API Controllers.
  • Depends on API Controller (via Restful interface)