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2.2 Business Case

📘 Business Case: EvenTicket – Event Booking Microservice Platform

🎯 Project Overview

EvenTicket is an online platform that allows users to search, book, and manage tickets for events like concerts, sports, workshops, and theater shows. The system should handle high traffic, support real-time availability, and ensure secure payment processing.

✅ Functional Requirements (FR)

  1. User Management

  2. Register/login (with email/password or social login)

  3. View profile, booking history

  4. Event Management

  5. Event organizers can create, update, and delete events

  6. Each event includes details (title, date, venue, tickets, price)

  7. Event Search & Discovery

  8. Users can search by category, location, or date

  9. Filter by availability, price range

  10. Ticket Booking

  11. Book one or more tickets

  12. Lock ticket inventory temporarily during booking

  13. Handle booking timeout and expiry

  14. Payments

  15. Integrate with a payment gateway (mocked for now)

  16. Generate order confirmation on successful payment

  17. Notifications

  18. Send booking confirmation via email/SMS

  19. Notify users of event updates/cancellations

  20. Admin Portal (optional)

  21. View reports, manage users/events/bookings

🚫 Non-Functional Requirements (NFR)

Category Requirement
Scalability System must handle 1000+ concurrent bookings per second
Availability 99.9% uptime SLA
Performance API response time < 500ms for most operations
Security Secure API access (OAuth2), input validation, payment encryption
Logging Centralized logging and error tracking for all services
Monitoring Real-time metrics and alerts using Prometheus + Grafana (or Azure Monitor)
Data Integrity Prevent double-booking of tickets using locking or event-driven updates
Resilience Use retries and circuit breakers for dependent services
Extensibility Should support new features like discounts, coupons, loyalty programs

🧱 Microservices (Suggested)

Service Name Responsibilities
Event Service Create/manage event listings
Payment Service Integrate with external payment gateway
Gateway API Entry point to all APIs, handles routing and authentication

📩 Event-Driven Architecture (Example Events)

Event Producer Consumers
EventCreated Event Service Search Service
BookingExpired Booking Service Ticket Release Handler

🛠 Tech Stack (Example)

  • Backend: .NET Core (Web API), Azure Service Bus for events
  • Frontend: .NET Core (MVC)
  • Database: SQL Server / CosmoDb (per service)
  • API Gateway: YARP (for routing)
  • Containerization: Docker, Docker Compose for local dev
  • Deployment: Kubernetes (minikube/kind for dev), or Azure AKS or GCHR
  • CI/CD: GitHub Actions
  • Monitoring: Prometheus, Grafana, ELK Stack

🧪 Testing Strategy

  • Unit tests for services
  • Integration tests for inter-service communication
  • Load testing using k6 or JMeter

📈 Future Enhancements

  • User reviews & ratings
  • QR code-based digital ticketing
  • Loyalty rewards system
  • Integration with calendar/reminder services
  • Event sponsorships and advertisements

Wireframe

wireframe-Landing-page wireframe-Detail-page.drawio.png wireframe-Shopping-Cart.drawio.png

Context Diagram

Module Decomposition Diagram

Component Diagram

Deployment Diagram

How System works

🤔 Why Microservices for EvenTicket?

🎯 Business Case: Event Booking Platform

EvenTicket needs to support a variety of independent but connected features — user management, event discovery, ticket booking, payments, notifications, etc. Microservices architecture is well-suited for this type of system.

✅ Benefits of Microservices for EvenTicket

1. Separation of Concerns

Each service handles only one responsibility:

  • UserService manages users.
  • BookingService handles ticket availability.
  • PaymentService focuses on transactions.

➡️ This makes the system easier to understand, maintain, and evolve.

2. Scalability

  • Some services like SearchService and BookingService might get more traffic.
  • Microservices allow independent scaling — scale only the services that need it, saving cost and improving performance.

3. Technology Flexibility

  • You can build services in different languages if needed (e.g., .NET for Booking, Node.js for Notification).
  • Allows teams to choose the best tools for each job.

4. Faster Development & Deployment

  • Teams can work independently on different services.
  • Deploy a new version of PaymentService without touching EventService.

➡️ Enables faster feature rollout and reduced risk of breaking the whole system.

5. Fault Isolation

  • If NotificationService fails, booking still works.
  • Reduces the risk of system-wide failure.

6. Event-Driven Capabilities

  • Microservices fit naturally into an event-driven system.
  • Example: After a successful booking, BookingService can emit a TicketBooked event → other services like Notification or Analytics can react asynchronously.

7. Easy to Extend

  • Adding new features like coupons, loyalty points, or QR code validation?
  • Just add new services without changing the existing ones.

🛠️ Microservices Match the Business Complexity

EvenTicket involves multiple domains:

  • Users
  • Events
  • Orders/Bookings
  • Payments
  • Notifications

Each has its own business logic, data model, and scaling requirements — making it a perfect candidate for microservices.

Port numbers for Microservice

Microservices | Local Env | Docker Env | Docker Inside |---|---|---|---| Event Catalog | 5000-5050 | 6000-6050 |8080-8081 | Shopping | 5001-5051 | 6001-6051 |8080-8081 | Discount | 5002-5052 | 6002-6052 |8080-8081 | Ordering | 5003-5053 | 6003-6053 |8080-8081 |