BookMyShow Ticket Booking System Design

How a movie ticket booking platform like BookMyShow prevents double booking: seat locking, a booking service, payment gateway integration and notifications.

How it flows

1. Web App → API Gateway (HTTPS/REST)
2. Mobile App → API Gateway (HTTPS/REST)
3. API Gateway → Auth Service (JWT Validate)
4. API Gateway → Search Service (REST)
5. API Gateway → Booking Service (REST)
6. API Gateway → Payment Service (REST)
7. Booking Service → Seat Lock Service (Lock / Release)
8. Booking Service → Primary Database (SQL)
9. Seat Lock Service → Cache / Seat Lock Store (Redis TTL)
10. Search Service → Search Index (Query)
11. Payment Service → Payment Gateway (HTTPS)
12. Payment Service → Message Broker (Payment Event)
13. Booking Service → Message Broker (Booking Event)
14. Message Broker → Notification Service (Consume)
15. Theatre Integration → Theatre Partner APIs (REST / XML)
16. Booking Service → Theatre Integration (gRPC)
17. Booking Service → Cache / Seat Lock Store (Read Cache)
18. Message Broker → Monitoring & Logging (Logs / Metrics)
19. Payment Service → Primary Database (SQL)

Components

Web App · Mobile App · API Gateway · Auth Service · Search Service · Booking Service · Seat Lock Service · Payment Service · Notification Service · Theatre Integration · Primary Database · Cache / Seat Lock Store · Search Index · Payment Gateway · Theatre Partner APIs · Message Broker · Monitoring & Logging

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