🛒 Order & Inventory Microservice System

This project demonstrates a Spring Boot-based microservice architecture with synchronous communication using Feign clients.

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📦 Microservices

1️⃣ Inventory Service (inventory-service)

• Manages product stock levels
• Exposes /inventory/check to validate availability

2️⃣ Order Service (demo)

• Handles item creation and retrieval
• Uses Feign to call Inventory Service before saving an item

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🔄 Communication Flow

Order Service (Feign Client) │ └───▶ Inventory Service /inventory/check?product=fridge&qty=2

Architecture Diagram

+-------------------+ Feign Client +----------------------+ | | ───────────────────────▶ | | | Order Service | | Inventory Service | | (demo) | ◀─────────────────────── | (inventory-service) | | | Stock Response | | +-------------------+ +----------------------+

User → /items (POST) → Order MS → checks stock → Inventory MS ← 400 if out of stock, else saves item

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🚀 How to Run

# Inventory Service
cd inventory-service
mvn spring-boot:run -DskipTests

# Order Service
cd demo
mvn spring-boot:run -DskipTests

🧠 Tech Stack
Spring Boot

Spring Cloud OpenFeign

REST APIs

Maven