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