Workerman development example sharing: development experience in achieving high stability of real-time chat system

Workerman Development Example Sharing: Development Experience of Realizing High Stability Instant Chat System

In recent years, with the popularity of instant messaging, more and more Internet applications require powerful instant chat functions . However, developing a highly stable instant chat system is not an easy task. This article will share the experience of using Workerman to develop an instant chat system and provide code examples to help developers better understand and apply this tool.

1. What is Workerman?

Workerman is a high-performance PHP asynchronous multi-process network programming framework. It adopts an event-driven programming model and can support millions of concurrent connections per second. Workerman is characterized by its non-blocking I/O, multi-process model and high concurrency processing capabilities. It is suitable for the development of online games, instant messaging, Internet of Things and other fields.

2. Start developing the instant chat system

1. Install Workerman

To use Workerman for development, you first need to install it. You can run the following command in the terminal to install:

composer require workerman/workerman

2. Create server

Next, you need to create a simple server and add a listening port and callback function to it. Processing client connections:

<?php
require_once __DIR__ . '/vendor/autoload.php';
use WorkermanWorker;

$worker = new Worker('websocket://0.0.0.0:8080');

$worker->count = 4; // 设置进程数

$worker->onConnect = function($connection) {
    // 当有新的客户端连接时，触发此回调函数
};

$worker->onMessage = function($connection, $data) {
    // 当接收到客户端消息时，触发此回调函数
};

$worker->onClose = function($connection) {
    // 当客户端连接关闭时，触发此回调函数
};

Worker::runAll();

3. Implementing the chat function

Next, you need to implement the instant chat function. Communication between client and server can be achieved using the WebSocket protocol. For example, the following code shows how to handle messages sent by a client and broadcast messages to other connected clients:

// ...

$worker->onMessage = function($connection, $data) {
    global $worker;
    foreach($worker->connections as $client) {
        // 向所有客户端广播消息
        $client->send($data);
    }
};

// ...

4. Increase stability

In a live chat In the system, stability is very important. In order to improve the stability of the system, monitoring and fault tolerance mechanisms can be added to the server. The following is a simple example:

// ...

use WorkermanLibTimer;

$worker->onWorkerStart = function() {
    // 每隔5秒检测是否有连接超时，超时则关闭连接
    Timer::add(5, function() {
        global $worker;
        $time_now = time();
        foreach($worker->connections as $connection) {
            if($time_now - $connection->lastMessageTime > 10) {
                $connection->close();
            }
        }
    });
};

// ...

By regularly detecting the last communication time of the connection, you can close the timeout connection to avoid resource waste and unexpected situations.

3. Summary

This article shares the experience of using Workerman to develop a highly stable instant chat system and provides relevant code examples. The advantage of Workerman lies in its high performance, high concurrency processing capabilities and multi-process model, which is suitable for development needs in fields such as real-time communication. I hope these experiences can be helpful to developers when implementing their own instant chat systems.

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