Loading...
To design a video streaming platform like Netflix, we must first identify the core requirements. The platform needs to cater to content creators, subscribers, and administrators while ensuring a smooth and scalable experience.
Based on the requirements, the main objects of the system are:
A User subscribes to a Subscription Plan and interacts with Videos.
The Recommendation Engine analyzes the User's preferences and viewing history to suggest Videos.
The Admin oversees the Videos and monitors user activities.
The Streaming Server serves Videos to the User based on their quality preference and network capability.
The Payment Gateway links Users and their Subscriptions to handle billing.
For inheritance and polymorphism:
Singleton: For managing a single instance of the Recommendation Engine and Streaming Server.
Observer: For notifying users of new content or subscription expiry.
Factory: To create Subscription Plans dynamically.
Decorator: For adding features like download support or HD streaming to premium subscriptions.
class User:
def __init__(self, user_id, name, email, subscription_type):
self.user_id = user_id
self.name = name
self.email = email
self.subscription_type = subscription_type
self.preferences = []
self.history = []
def watch_video(self, video_id):
self.history.append(video_id)
def update_preferences(self, genre):
self.preferences.append(genre)
class Video:
def init(self, video_id, title, genre, duration, quality_options):
self.video_id = video_id
self.title = title
self.genre = genre
self.duration = duration
self.quality_options = quality_options
class StreamingServer:
def init(self):
self.sessions = {}
def stream_video(self, user_id, video_id, quality):
# Logic to handle adaptive streaming
pass
Single Responsibility: Each class focuses on a single responsibility, such as managing users or streaming content.
Open/Closed Principle: Adding new subscription plans or video types doesn't modify existing classes.
Liskov Substitution: Subtypes like PremiumUser can replace User without breaking functionality.
Interface Segregation: Interfaces for payment and content management are separate.
Dependency Inversion: High-level modules like the recommendation system depend on abstractions, not specific implementations.
The design leverages a microservices architecture to handle scalability. Services like streaming, recommendation, and payment are decoupled, allowing independent scaling and updates. Content delivery networks (CDNs) are essential for minimizing latency during video playback.