Food Delivery App

A distributed food delivery system implemented in Java using a MapReduce-like architecture for efficient store searching and order processing.

Architecture

The system follows a distributed architecture with the following components:

• Master: Central coordinator that manages communication between clients and workers
• Workers: Distributed nodes that process store data and handle operations
• Reducer: Aggregates results from multiple workers
• Clients: End users who can search for stores and place orders
• Manager: Administrative interface for store and product management

Features

For Customers

• Search for nearby stores based on location (within specified radius)
• Filter stores by:
  • Food categories
  • Minimum rating
  • Price category
• View store products and place orders
• Rate stores

For Store Managers

• Add new stores with JSON configuration
• Add/Update products
• Remove products or update quantities
• View sales statistics by:
  • Store type
  • Product category

Code Structure

Core Components

• Master.java: Main server that coordinates communication
• Worker.java: Distributed processing nodes
• Reducer.java: Result aggregation service
• Client.java: Customer interface
• Manager.java: Store management interface

Models

• Store.java: Store entity with location and rating info
• Product.java: Product details and inventory
• Purchase.java: Order information
• MapReduceRequest.java: Search/filter request format

Supporting Classes

• Actions.java: Request handling logic for Master
• WorkerActions.java: Request processing logic for Workers
• ReducerActions.java: Aggregation logic for Reducer
• StoreData.java: JSON parsing and store data management

Data Format

Stores are configured using JSON files with the following structure:

{
  "StoreName": "store name",
  "Latitude": 00.000000,
  "Longitude": 00.000000,
  "FoodCategory": "category",
  "Stars": 0,
  "NoOfVotes": 0,
  "StoreLogo": "",
  "Products": [
    {
      "ProductName": "product name",
      "ProductType": "category",
      "Available Amount": 0,
      "Price": 0.00
    }
  ]
}

Getting Started

1. Start the Reducer server:

2. Start one or more Worker nodes:

3. Start the Master server with Worker addresses:

java Master <worker1_ip> <worker1_port> <worker2_ip> <worker2_port> ...

4. Run the Client or Manager application:

java Client
# or
java Manager

Dependencies

• Java 8 or higher
• json-simple-1.1.1.jar for JSON processing

Configuration

The system uses the following default ports:

• Master: 4321
• Reducer: 4325
• Workers: User-specified ports passed as arguments

Contributing

Feel free to submit issues and enhancement requests.