Analytics Manager (Mobile System Design)

The project demonstrates system design of a simple analytics manager for a mobile application.

The implementation is in Swift, demo uses SwiftUI and tested using Swift Testing framework.

Functional Requirements

• The system provides an analytic service.
• The service is accessible from any location in code.
• The service receives analytics data from the application, as event.
• The service provides an input end point to receive an event.
• The service can accept multiple events.
• Each event must have a name and time.
• Each event can have additional associated data.
• The service provides option to set user id, session id and other metadata regarding the state of the application.
• The system supports different types of analytic services.
• Each service can specify the type of events it accepts.

Non-Functional Requirements

• System should be scalable.
  • Adding/removing new analytic services should be easy.
  • Adding/removing new types of events should be easy.
• System should be testable.

Solution

Event

• An AnalyticsEvent is defined as an interface with desired properties.
• The interface can be implemented by different types of events.

Service

• A protocol AnalyticsService is defined that provides methods to set metadata and send events.
• The protocol can be implemented by different types of analytic services.
• The protocol oriented approach enables scalability and testability.
• An AnalyticsManager class is defined that manages multiple analytic services at once.
• The manager can add/remove services and send events to all services.
• This class is implemented as a singleton, so that it can be accessed from any location in code.

System Design

Class Diagram