Uber Clone Scenario

DDD/CQRS/Event Sourcing model for a ride-hailing platform inspired by Uber. Deep dive into building blocks, lifecycle, and data flows.

Context

Users request rides; drivers accept; rides are started, completed, and paid. System must handle surge pricing, routing, and safety checks across multiple regions.

Key Building Blocks

  • Actors: Rider, Driver
  • Aggregates: Ride
  • Domain Events: RideRequested, DriverAssigned, RideStarted, RideEnded, RideCancelled
  • Commands: RequestRide, AcceptRide, StartRide, EndRide, CancelRide
  • Read Models: RideDetails, DriverAvailability

Lifecycle

  1. Rider requests a ride (RequestRide).
  2. System assigns a nearby Driver (DriverAssigned).
  3. Driver begins trip (RideStarted).
  4. Trip ends at destination (RideEnded).
  5. Payment processed and recorded (PaymentProcessed).

Policies

  • Surge pricing policy during demand spikes.
  • Cancellation penalties and refunds.
  • Driver safety checks and rider verification.

Integrations

  • Maps and routing services
  • Payment gateways
  • Notification channels

Historical Events

Event history allows reconstruction of each ride lifecycle for auditing and analytics.


RideRequested | DriverAssigned | RideStarted | RideEnded | PaymentProcessed