https://github.com/ad1822/rtorderprocessing

Kafka Microservice Application for Order Processing
https://github.com/ad1822/rtorderprocessing

docker-compose kafka microservices nodejs postgresql ts

Last synced: about 2 months ago
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Kafka Microservice Application for Order Processing

• Host: GitHub
• URL: https://github.com/ad1822/rtorderprocessing
• Owner: ad1822
• Created: 2025-05-01T02:49:31.000Z (about 1 year ago)
• Default Branch: dev
• Last Pushed: 2025-05-05T11:08:21.000Z (about 1 year ago)
• Last Synced: 2025-05-05T12:24:58.046Z (about 1 year ago)
• Topics: docker-compose, kafka, microservices, nodejs, postgresql, ts
• Language: TypeScript
• Homepage:
• Size: 73.2 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# 🛒 Order Processing System – Microservices Architecture

A Kafka-based microservices project implementing a distributed **Order Processing System**, comprised of three independent services: **Order**, **Inventory**, and **Payment**. These services communicate asynchronously using Kafka topics to ensure loose coupling and high scalability.

## Diagram

![Diagram](image.png)

## 📦 Microservices

### 1. **Order Service**

- Accepts customer orders.

- Publishes events to Kafka.

- Listens for payment status updates.

### 2. **Inventory Service**

- Listens for new order events.

- Checks and reserves inventory.

- Publishes success or failure events.

### 3. **Payment Service**

- Listens for reserved inventory events.

- Simulates/generates payment.

- Updates payment status.

Each service has its own isolated **PostgreSQL** database instance for data encapsulation and autonomy (following the **Database per Service** pattern).

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## 🔄 Kafka Topics

| Kafka Topic                | Description                                            | Publisher         | Subscriber(s)                     |

| -------------------------- | ------------------------------------------------------ | ----------------- | --------------------------------- |

| `order.created.v1`         | Published when a new order is created.                 | Order Service     | Inventory Service                 |

| `inventory.reserved.v1`    | Published after inventory is successfully reserved.    | Inventory Service | Payment Service                   |

| `inventory.failed.v1`      | Published if inventory reservation fails.              | Inventory Service | Order Service                     |

| `payment.generated.v1`     | Published when payment is generated/simulated.         | Payment Service   | Order Service                     |

| `order.payment.updated.v1` | Published to notify order status update after payment. | Order Service     | (For downstream services, if any) |

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