在业务中有时会碰到延迟操作，如下单后半小时未支付则取消订单、下单后十五分钟未支付则发短信提醒等等。那这样的需求如何去实现呢。
相关学习推荐：PHP编程从入门到精通
我们以订单创建15分钟后未支付，给用户发送邮件为场景进行学习
//创建订单的逻辑/**
* 随机创建订单
*/$order = [
'order_number' => mt_rand(100,10000).date("YmdHis"),
'user_id' => mt_rand(1, 100),
'order_amount' => mt_rand(100, 1000),];
/**@var $manager Illuminate\Database\Capsule\Manager **/
$conn = $manager;$insertResult = $conn::table("order")
->insert($order);print_r($insertResult);延迟处理逻辑
while(true) {
// 未支付订单列表
$orderList = $conn::table("order")
->where("created_time", '<=', date("Y-m-d H:i:s", strtotime("-15 minutes")))
->where('sended_need_pay_notify', '=', 2)
->where('status', '=', 1)
->select(['user_id', 'id'])
->orderBy("id", 'asc')
->get();
$orderList = json_decode(json_encode($orderList), true);
foreach ($orderList as $orderInfo) {
sendEmail($orderInfo['user_id']);
$conn::table('order')
->where('id', '=', $orderInfo['id'])
->update(['sended_need_pay_notify' => 1]);
logs("update-success-orderId-". $orderInfo['id']."-userId-".$orderInfo['user_id']);
}
sleep(10);}执行处理脚本
gaoz@nobodyMBP delay_mq_demo % php first_while_handler.php send email to 73 success ... 2020-06-24 11:37:36:update-success-orderId-3-userId-73
这种方式吧实现简单，但是不优雅，同时大批量订单产生也会遇到问题。
// 创建订单的逻辑try
{
/**
* 随机创建订单
*/
$order = [
'order_number' => mt_rand(100,10000).date("YmdHis"),
'user_id' => mt_rand(1, 100),
'order_amount' => mt_rand(100, 1000),
];
/**@var $manager Illuminate\Database\Capsule\Manager **/
$conn = $manager;
$insertId = $conn::table("order")
->insertGetId($order);
$body = json_encode(['order_id' => $insertId, 'created_time' => date("Y-m-d H:i:s")]);
$publishMessage = new TopicMessage(
$body );
// 设置消息KEY
$publishMessage->setMessageKey("MessageKey");
// 定时消息, 定时时间为3分钟后
$publishMessage->setStartDeliverTime(time() * 1000 + 3 * 60 * 1000);
$result = $this->producer->publishMessage($publishMessage);
print "Send mq message success. msgId is:" . $result->getMessageId() . ", bodyMD5 is:" . $result
-
>getMessageBodyMD5() . "\n";
} catch (\Exception $e) {
print_r($e->getMessage() . "\n");
}消费逻辑 同样是在消费者中处理
foreach ($messages as $message) {
$receiptHandles[] = $message->getReceiptHandle();
$messageBody = $message->getMessageBody();
$orderInfo = json_decode($messageBody, true);
if (!empty($orderInfo['order_id'])) {
$orderId = $orderInfo['order_id'];
/**@var $manager Illuminate\Database\Capsule\Manager * */
$conn = $manager;
$orderInfo = $conn::table("order")
->select(['id', 'user_id'])
->where('id', '=', $orderId)
->where('status', '=', 1)
->first();
if (!empty($orderInfo)) {
$orderInfo = json_decode(json_encode($orderInfo), true);
sendEmail($orderInfo['user_id']);
$conn::table('order')
->where('id', '=', $orderInfo['id'])
->update(['sended_need_pay_notify' => 1]);
logs("update-success-orderId-" . $orderInfo['id'] .
"-userId-" . $orderInfo['user_id']);
}
}
}启动生产一条消息
gaoz@nobodyMBP delay_mq_demo % php rocket_mq_handler_producer.php Send mq message success. msgId is:76CF2135696C3D4EAC698A9FA1E1879D, bodyMD5 is:63448B50AA7B8AF47B07AA7CE807E3D3 gaoz@nobodyMBP delay_mq_demo %
启动消费者慢慢等待
gaoz@nobodyMBP delay_mq_demo % php rocket_mq_handler_consumer.php
No message, contine long polling!RequestId:5EF752583441411C74869BA9
No message, contine long polling!RequestId:5EF7525B3441411C74869FE2
No message, contine long polling!RequestId:5EF7525E3441411C7486A42C
No message, contine long polling!RequestId:5EF752613441411C7486A7D9
consume finish, messages:send email to 95 success ...2020-06-27 12:08:05:update-success-orderId-8-userId-95
Array(
[0] => 76CF2135696C3D4EAC698A9FA1E1879D-MCAxNTkzMjY2NzkxNDM5IDMwMDAwMCAzIDAgYmpzaGFyZTUtMDggNSAw)
ack这种方式有现有的服务可以使用，减少开发时间
// 生产者$exchange = 'order15min_notify_exchange';
$queue = 'order15minx_notify_queue';$dlxExchange = "dlx_order15min_exchange";
$dlxQueue = "dlx_order15min_queue";
$connection = new AMQPStreamConnection(getenv('RABBIT_HOST'), getenv('RABBIT_PORT'), getenv("RABBIT_USER"), getenv("RABBIT_PASS"), getenv("RABBIT_VHOST"));
$channel = $connection->channel();$channel->exchange_declare($exchange, AMQPExchangeType::DIRECT, false, true, false);
$channel->exchange_declare($dlxExchange, AMQPExchangeType::DIRECT, false, true, false);// 设置队列的过期时间// 正常队列$table = new \PhpAmqpLib\Wire\AMQPTable();// 消息有效期$table->set('x-message-ttl', 3*60*1000);$table->set("x-dead-letter-exchange", $dlxExchange);$channel->queue_declare($queue, false, true, false, false, false, $table);$channel->queue_bind($queue, $exchange);// 死信队列$channel->queue_declare($dlxQueue, false, true, false, false, false);$channel->queue_bind($dlxQueue, $dlxExchange);/**
* 随机创建订单
*/$order = [
'order_number' => mt_rand(100,10000).date("YmdHis"),
'user_id' => mt_rand(1, 100),
'order_amount' => mt_rand(100, 1000),];/**@var $manager Illuminate\Database\Capsule\Manager **/$conn = $manager;$insertId = $conn::table("order")
->insertGetId($order);$messageBody = json_encode(['order_id' => $insertId, 'created_time' => date("Y-m-d H:i:s")]);
$message = new AMQPMessage($messageBody, array('content_type' => 'text/plain', 'delivery_mode' => AMQPMessage::DELIVERY_MODE_PERSISTENT));
$channel->basic_publish($message, $exchange);消费者
$dlxExchange = "dlx_order15min_exchange";$dlxQueue = "dlx_order15min_queue";
$connection = new AMQPStreamConnection(getenv('RABBIT_HOST'), getenv('RABBIT_PORT'), getenv("RABBIT_USER"), getenv("RABBIT_PASS"), getenv("RABBIT_VHOST"));
$channel = $connection->channel();
$channel->queue_declare($dlxQueue, false, true, false, false);$channel->exchange_declare($dlxExchange, AMQPExchangeType::DIRECT, false, true, false);
$channel->queue_bind($dlxQueue, $dlxExchange);/**
* @param \PhpAmqpLib\Message\AMQPMessage $message
*/function process_message($message){
echo "\n--------\n";
echo $message->body;
echo "\n--------\n";
$orderInfo = json_decode($message->body, true);
if (!empty($orderInfo['order_id'])) {
$orderId = $orderInfo['order_id'];
/**@var $conn Illuminate\Database\Capsule\Manager * */
$conn = getdb();
$orderInfo = $conn::table("order")
->select(['id', 'user_id'])
->where('id', '=', $orderId)
->where('status', '=', 1)
->first();
if (!empty($orderInfo)) {
$orderInfo = json_decode(json_encode($orderInfo), true);
sendEmail($orderInfo['user_id']);
$conn::table('order')
->where('id', '=', $orderInfo['id'])
->update(['sended_need_pay_notify' => 1]);
logs("update-success-orderId-" . $orderInfo['id'] . "-userId-" . $orderInfo['user_id']);
}
}
$message->delivery_info['channel']->basic_ack(
$message->delivery_info['delivery_tag']);}$channel->basic_consume($dlxQueue, $consumerTag, false, false, false, false, 'process_message');启动消费者
gaoz@nobodyMBP delay_mq_demo % php rabbit_mq_handler_consumer.php
--------
{"order_id":7,"created_time":"2020-06-27 11:50:08"}
--------
send email to 2 success ...
2020-06-27 11:56:55:update-success-orderId-7-userId-2分别启动消费者、生产者就可以了，这里面消息的流转可以看到
消息先进入到正常队列，过期后进入了死信队列而被消费
代码示例：github.com/nobody05/delay_mq_demo
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