Low Level Design & OOP
Design a Threaded Comment System with User Tags
Asked by:Postman
object_modelinginterfacesstate_managementextensibilitytesting
Problem Overview & Object Oriented Requirements
Model comments, one-level replies, user-tag parsing, edits, deletion, ordering, and mention-intent boundaries for a social application.
Design Principles: Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion (SOLID).
Topics & Patterns: object_modeling, interfaces, state_management, extensibility, testing.
Class Design Breakdown
1. Identify Core Entities
List primary objects, state enums, value objects, and domain controllers.
2. Class Relationships
Define inheritance, composition, aggregation, and interface abstractions.
3. Apply Design Patterns
Incorporate Strategy, Factory, Observer, State, or Decorator design patterns.
4. Concurrency & Extensibility
Handle thread locks, synchronization, and future extensions cleanly.