In this video of code decode we have explained the architecture of food delivery application
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*Architectural Flow of a Food Delivery App*
A food delivery app involves various components working together to handle user requests, process orders, manage logistics, and provide real-time updates. Here's a breakdown of the key layers and their architectural flow:
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*1. Frontend Layer (User Interface)*
*Components:* Mobile app (iOS/Android) and web app.
*Users:*
*Customers:* Browse restaurants, place orders, track deliveries.
*Restaurants:* Manage menus, accept/reject orders.
*Delivery Personnel:* Receive delivery assignments, update order status.
*Technologies:* Angular, React.js.
*2. Backend Layer (Application Server)*
*Components:*
*Customer Service:* Handles user authentication, profiles, and orders.
*Restaurant Service:* Manages menus, orders, and restaurant data.
*Delivery Service:* Assigns orders to delivery personnel and updates status.
*Technologies:* Spring Boot (Java), .
*Flow:*
*3. Database Layer*
*Databases:*
*Relational (SQL):* User profiles, orders, restaurant details (e.g., MySQL, PostgreSQL).
*NoSQL:* Menu data, real-time tracking, logs (e.g., MongoDB, DynamoDB).
*Caching:* Redis for frequently accessed data (menus, restaurant details).
*4. Microservices Communication*
*Message Brokers:* Kafka, RabbitMQ for asynchronous communication.
*API Gateway:* Manages requests and routes them to appropriate microservices (e.g., Spring Cloud Gateway).
*5. Delivery and Logistics Management*
*Components:*
*Delivery Assignment Engine:* Assigns orders to the nearest available delivery person.
*Location Tracking:* Real-time GPS tracking of delivery personnel.
*Technologies:* Google Maps API, GPS services.
*Flow:*
1. The delivery service assigns the order to a nearby delivery partner based on location and availability.
2. The delivery partner updates the order status (e.g., "Picked up," "Delivered").
3. The customer can track the delivery in real-time.
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*6. Notification and Communication Layer*
*Components:* Push notifications, SMS, email services.
*Technologies:* Kafka, Twilio.
*Flow:*
1. Notifications are sent to users when the order status changes (e.g., order confirmation, out for delivery).
2. Restaurants receive order alerts through their dashboard or via email/SMS.
3. Delivery personnel receive notifications for new delivery assignments.
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*7. Payment Gateway Integration*
*Components:* Payment processing services (e.g., Stripe, PayPal, Razorpay).
*Flow:*
1. The customer selects a payment method and completes the transaction.
2. Payment details are securely processed, and an acknowledgment is sent to the app.
3. Refunds or order cancellations are managed through the payment gateway.
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*8. Analytics and Monitoring Layer*
*Components:* User behavior analytics, order trends, system monitoring.
*Technologies:* Prometheus, Grafana, Google Analytics.
*Flow:*
Collects data on app usage, order patterns, and delivery efficiency.
Provides insights to optimize operations (e.g., peak hours, popular items)
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