Implementing high-concurrency online ordering system based on Workerman

A high-concurrency online ordering system based on Workerman

Introduction
With the rapid development of the Internet, more and more people choose to order food online. Especially in busy urban life, online ordering brings great convenience to people. However, for food ordering platforms, how to achieve high concurrency processing has become an important challenge. This article will introduce how to build a highly concurrent online ordering system based on the Workerman framework, and illustrate it through code examples.

Introduction to Workerman
Workerman is a high-performance PHP socket framework based on the asynchronous IO model and is particularly suitable for developing high-concurrency network applications. Workerman adopts an event-driven approach. Compared with the traditional PHP blocking model, it can handle multiple connections at the same time, improving the concurrency capabilities of the application.

System Design
In this example, we will design a simple online ordering system, including three main components: client, server and database. The client sends ordering requests to the server through HTTP requests, and the server processes these requests and returns the results to the client. The database is used to store user information and order information.

Code implementation

1. Client
   The client communicates with the server through HTTP requests. In actual development, any tool that conforms to the HTTP protocol can be used, such as browsers, Postman, etc. The following is a sample code for the client to send a meal order request:

<?php
$url = 'http://localhost:8080';
$data = [
    'user_id' => 1,
    'dish_id' => 1,
    'quantity' => 2
];
$options = [
    'http' => [
        'method' => 'POST',
        'header' => 'Content-Type: application/json',
        'content' => json_encode($data)
    ]
];
$context = stream_context_create($options);
$result = file_get_contents($url, false, $context);
echo $result;

2. Server
   The server uses the Workerman framework to handle the client's request. The following is a sample code for the server to receive and process the client's ordering request:

<?php
require_once __DIR__ . '/Workerman/Autoloader.php';

use WorkermanWorker;

$worker = new Worker('http://0.0.0.0:8080');
$worker->count = 4;

$worker->onMessage = function ($connection, $data) {
    $data = json_decode($data, true);
    // 处理订餐请求，包括验证用户信息、库存检查、生成订单等逻辑
    // ...
    $response = [
        'status' => 200,
        'message' => 'Order placed successfully'
    ];
    $connection->send(json_encode($response));
};

Worker::runAll();

3. Database
   In actual development, you can choose to use a relational database (such as MySQL) or a non-relational database A database (such as MongoDB) to store user information and order information. The following is a simple design of a database table:

CREATE TABLE `users` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) NOT NULL,
  `email` varchar(50) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE `dishes` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(50) NOT NULL,
  `price` decimal(10,2) NOT NULL,
  `quantity` int(11) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE `orders` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `dish_id` int(11) NOT NULL,
  `quantity` int(11) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

Conclusion
By using the Workerman framework, we can easily build an efficient online ordering system. Workerman's asynchronous IO model allows the system to handle multiple connections at the same time, improving the system's concurrency capabilities. This article provides a basic system design and code example for readers' reference. In actual development, function expansion and performance optimization can be carried out according to project needs.

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