Application of queue technology in message timeout processing and message arrival guarantee in PHP and MySQL

The application of queue technology in message timeout processing and message arrival guarantee in PHP and MySQL

With the continuous development of Internet applications, the processing of a large number of real-time messages has become a An indispensable part of every system. In order to ensure reliable delivery and processing of messages, we need to use queue technology. An important application of queue technology is to implement message timeout processing and message arrival guarantee.

PHP, as a popular server-side programming language, is widely used in web development. MySQL is one of the most popular database management systems today. This article will introduce how to use queue technology in PHP and MySQL to implement message timeout processing and message arrival guarantee, and provide specific code examples.

1. Message timeout processing

In actual applications, we often encounter message processing timeout. For example, if you send an SMS verification code to a user, you need to receive a reply from the user within a certain period of time. If a reply is not received within the specified time, corresponding processing will be required. This problem can be solved well using queue technology.

In MySQL, we can create a message queue table to record the messages that need to be processed and their timeout time. The table structure can be designed as follows:

CREATE TABLE message_queue (
    id INT AUTO_INCREMENT PRIMARY KEY,
    message TEXT,
    timeout TIMESTAMP,
    status ENUM('pending', 'processed', 'timeout') DEFAULT 'pending'
);

In PHP, we can write a script to scan the message queue table and determine whether it has timed out. If it times out, change the status to timeout and handle it accordingly.

<?php

// 连接数据库
$conn = new mysqli('localhost', 'username', 'password', 'database');

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 查询未处理的超时消息
$query = "SELECT * FROM message_queue WHERE status='pending' AND timeout < NOW()";
$result = $conn->query($query);

if ($result->num_rows > 0) {
    // 执行超时处理逻辑
    while ($row = $result->fetch_assoc()) {
        // 处理超时消息
        // ...
        
        // 更新消息状态为timeout
        $update = "UPDATE message_queue SET status='timeout' WHERE id=" . $row['id'];
        $conn->query($update);
    }
}

// 关闭数据库连接
$conn->close();
?>

By executing the above script regularly, timeout messages can be processed in a timely manner to ensure the normal operation of the system.

2. Message Arrival Guarantee

In addition to processing timeout messages, queue technology can also be used to ensure the reliable arrival of messages. In practical applications, if an error or interruption occurs during sending a message, the message may be lost. To solve this problem, we can save the message to a queue and delete it after the message is successfully processed.

In MySQL, we can use a table to act as a queue. The table structure can be designed as follows:

CREATE TABLE message_queue (
    id INT AUTO_INCREMENT PRIMARY KEY,
    message TEXT,
    status ENUM('pending', 'processed') DEFAULT 'pending'
);

In PHP, we can write a function that sends a message to save the message to the queue and return the unique identifier of the message.

<?php

// 连接数据库
$conn = new mysqli('localhost', 'username', 'password', 'database');

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

/**
 * 发送消息并保存到队列中
 * @param string $message 消息内容
 * @return int 消息ID
 */
function send_message($message) {
    global $conn;
    
    // 保存消息到队列表中
    $insert = "INSERT INTO message_queue (message) VALUES ('$message')";
    $conn->query($insert);
    
    // 返回消息ID
    return $conn->insert_id;
}

// 关闭数据库连接
$conn->close();
?>

After the message processing is completed, we can delete it from the queue based on the message ID.

<?php

// 连接数据库
$conn = new mysqli('localhost', 'username', 'password', 'database');

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

/**
 * 处理消息并从队列中删除
 * @param int $message_id 消息ID
 */
function process_message($message_id) {
    global $conn;
    
    // 处理消息逻辑
    // ...
    
    // 删除消息
    $delete = "DELETE FROM message_queue WHERE id=$message_id";
    $conn->query($delete);
}

// 关闭数据库连接
$conn->close();
?>

Through the above code examples, we can implement message timeout processing and message arrival guarantee in PHP and MySQL. These technologies can ensure the reliable delivery and processing of messages and improve the reliability and stability of the system. In practical applications, we can make appropriate adjustments and expansions according to specific needs to meet the needs of the system.

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