☕ Cloud Café - Smart Café Management System

Introduction

The Smart Café Management System is designed to streamline the daily operations of a modern café using the OSGI framework. The system leverages a microkernel architecture to provide modular, scalable, and efficient management of key café operations. By dividing the system into Producer and Consumer bundles, the café can handle tasks such as order processing, stock management, payment processing, and employee shift management decoupled and flexible.

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Objectives

• Efficient Order Management: Handle customer orders seamlessly and ensure timely service.

📌 Order Processing Service -> Waiter

The Order Processing Service manages new orders and sends the details to the Waiter.

Order Management System Explanation

The Order Processing System begins by welcoming the user and displaying a menu. Users select items, specify quantities, and confirm additions. They can choose to add more items or proceed to select an order type. The system calculates the total bill, applies a discount if specified, and displays the final amount. Users then select a payment method, and the system processes the payment. Finally, an order summary is displayed, and the system concludes with a goodbye message.

1️⃣ Welcome Message

• The system greets the user with a friendly message, indicating that it is ready to take an order.

2️⃣ Display Menu

• Displays the menu, including a list of items with their item numbers, names, and prices.

3️⃣ Ordering Items

• Prompts the user to enter the item number and quantity.
• Confirms each addition with a ✅ emoji, displaying the item name and quantity.

4️⃣ Adding More Items

• The system asks if the user wants to add more items:
  • Y (Yes): Continue adding items.
  • N (No): Proceed to the next step.

5️⃣ Select Order Type

• The user selects the order type:
  • Dine-in 🍽️: Eating at the café.
  • Takeaway 🥡: Taking food to go.
  • Delivery 🚚: Food delivered to their location.

6️⃣ Calculate Total Before Discount

• The system calculates the total before applying any discounts and displays the amount.

7️⃣ Apply Discount

• The system offers the user discount options:
  • 10% Discount 💰: Deducts 10% from the total bill.
  • Rs. 50 Off 🪙: Flat discount of Rs. 50.
  • No Discount ❌: No discount is applied.

8️⃣ Calculate Total After Discount

• Displays the final bill amount after applying the selected discount.

9️⃣ Select Payment Type

• The user selects a payment method:
  • Cash 💵: Pay with cash.
  • Credit Card 💳: Pay using a credit card.
  • Digital Wallet 📱: Pay using a digital wallet (e.g., PayPal, Google Pay).

🔟 Process Payment

• Processes the payment based on the selected method:
  • ✅ Success Message: Payment successful.
  • ❌ Failure Message: Payment failed.

1️⃣1️⃣ Display Order Summary 🧾

• Displays a detailed summary including:
  • Ordered items with quantity & price.
  • Subtotal (before discount).
  • Applied discount (if any).
  • Final total (after discount).

1️⃣2️⃣ Goodbye Message

• The system displays a goodbye message when the order process concludes.

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📌 Technology Stack

• Java (Primary Language)
• OSGI Framework (Microkernel Architecture)

📌 Features

✔️ Modular & scalable architecture with Producer and Consumer bundles.
✔️ Efficient order processing and payment handling.
✔️ Multiple payment methods supported.
✔️ Discounts & promotional offers integration.
✔️ Flexible ordering options (Dine-in, Takeaway, Delivery).

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📌 OSGI Framework Commands

Start the OSGI Framework

java -jar felix.jar

Install the Producer Bundle

install file:OrderProcessingProducer.jar

Start the Producer Bundle

start file:OrderProcessingProducer.jar

or

start <bundle_id>

Stop the Producer Bundle

stop file:OrderProcessingProducer.jar

or

stop <bundle_id>

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Install the Consumer Bundle

install file:OrderProcessingConsumer.jar

Start the Consumer Bundle

start file:OrderProcessingConsumer.jar

or

start <bundle_id>

Stop the Consumer Bundle

stop file:OrderProcessingConsumer.jar

or

stop <bundle_id>