队列技术在PHP与MySQL中的消息过滤和消息中间件的应用

CREATE TABLE `messages` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `message` VARCHAR(255) NOT NULL,
  `status` TINYINT(1) NOT NULL DEFAULT '0',
  `created_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

<?php
// 连接数据库
$mysqli = new mysqli("localhost", "username", "passWord", "database");

// 插入消息
$query = "INSERT INTO messages (message) VALUES ('Message 1'), ('Message 2'), ('Message 3')";
$mysqli->query($query);

// 关闭数据库连接
$mysqli->close();
?>

<?php
// 连接数据库
$mysqli = new mysqli("localhost", "username", "password", "database");

// 获取未处理的消息
$query = "SELECT * FROM messages WHERE status = 0";
$result = $mysqli->query($query);

// 处理消息
while ($row = $result->fetch_assoc()) {
    $message = $row['message'];
    
    // 处理消息的代码
    // ...
    
    // 标记为已处理
    $query = "UPDATE messages SET status = 1 WHERE id = {$row['id']}";
    $mysqli->query($query);
}

// 关闭数据库连接
$mysqli->close();
?>

$ pecl install amqp

<?php
// 创建连接
$connection = new AMQPConnection([
    'host' => 'localhost',
    'port' => '5672',
    'login' => 'guest',
    'password' => 'guest'
]);
$connection->connect();

// 创建通道
$channel = new AMQPChannel($connection);

// 创建交换机
$exchange = new AMQPExchange($channel);
$exchange->setName('my_exchange');
$exchange->setType(AMQP_EX_TYPE_DIRECT); // 直连交换机
$exchange->declareExchange();

// 创建消息
$message = 'Hello, RabbitMQ';

// 发布消息
$exchange->publish($message, 'my_routing_key');

// 关闭连接
$connection->disconnect();
?>

<?php
// 创建连接
$connection = new AMQPConnection([
    'host' => 'localhost',
    'port' => '5672',
    'login' => 'guest',
    'password' => 'guest'
]);
$connection->connect();

// 创建通道
$channel = new AMQPChannel($connection);

// 创建交换机
$exchange = new AMQPExchange($channel);
$exchange->setName('my_exchange');
$exchange->setType(AMQP_EX_TYPE_DIRECT); // 直连交换机
$exchange->declareExchange();

// 创建队列
$queue = new AMQPQueue($channel);
$queue->setName('my_queue');
$queue->declareQueue();
$queue->bind('my_exchange', 'my_routing_key');

// 消费消息
while ($message = $queue->get()) {
    $message->ack();
    
    // 处理消息的代码
    // ...
}
?>