Services vs Repositories

Services

• Part of the business logic layer.
• Concerned with implementing business rules. For example:
  • Determine initial status of a credit card application
  • Determine what client details to expose when a client is referred from one firm to another.
• A service can interact with multiple repositories to perform its operations.

Repositories

• Part of the data access layer.
• Concerned with data retrieval and persistence. For example:
  • How to find all the different types of reports for a client using a clientId.
  • How to find all the notes between two firms regardless of which firm users added those notes.
• A repository isn’t usually aware of higher-level business logic.