事情就是这样。
我正在使用PHP AMQP读取Rabbitmq的结果队列,以便处理发送的每封电子邮件的重要信息。完成后,我需要删除该消息或将其标记为已写入,以便下次读取队列时不会收到已处理的消息。
由于Rabbitmq服务器每小时发送超过10000封电子邮件,每次我读取队列以处理结果发送时,脚本至少可以运行5分钟,以便处理队列中的所有消息,因此在完成后,在这5分钟内,有数百条新消息被放置。这使得我无法在脚本完成后清除队列,因为它会删除脚本运行期间未处理的消息位置。
这让我只有一个选择。在我的AMQP脚本处理或读取消息后,标记或删除消息。
有办法做到这一点吗?(这是脚本)
<?php
/**
* result.php
* Script that connects to RabbitMQ, and takes the result message from
* the result message queue.
*/
// include the settings
require_once('settings.php');
// try to set up a connection to the RabbitMQ server
try
{
// construct the connection to the RabbitMQ server
$connection = new AMQPConnection(array(
'host' => $hostname,
'login' => $username,
'password' => $password,
'vhost' => $vhost
));
// connect to the RabbitMQ server
$connection->connect();
}
catch (AMQPException $exception)
{
echo "Could not establish a connection to the RabbitMQ server.'n";
}
// try to create the channel
try
{
// open the channel
$channel = new AMQPChannel($connection);
}
catch (AMQPConnectionException $exception)
{
echo "Connection to the broker was lost (creating channel).'n";
}
// try to create the queue
try
{
// create the queue and bind the exchange
$queue = new AMQPQueue($channel);
$queue->setName($resultbox);
$queue->setFlags(AMQP_DURABLE);
$queue->bind('exchange1', 'key1');
$queue->declare();
}
catch (AMQPQueueException $exception)
{
echo "Channel is not connected to a broker (creating queue).'n";
}
catch (AMQPConnectionException $exception)
{
echo "Connection to the broker was lost. (creating queue)/'n";
}
// Get the message from the queue.
while ($envelope = $queue->get()) {
//Function that processes the message
process_message($envelope->getBody());
}
$queue->purge();
// done, close the connection to RabbitMQ
$connection->disconnect();
?>
成功处理后确认消息$queue->ack()
,甚至使用AMQP_AUTOACK
标志消费/获取消息。
UPD:
基于您的代码:
1.确认消息while ($envelope = $queue->get()) {
//Function that processes the message
process_message($envelope->getBody());
$queue->ack($envelope->getDeliveryTag());
}
2.使用AMQP_AUTOACK
标志获取:while ($envelope = $queue->get(AMQP_AUTOACK)) {
//Function that processes the message
process_message($envelope->getBody());
}
p.S.:
检查AMQPQueue::消费文档,看起来这里更合适。
3.您可以在处理后消费和确认消息:$queue->consume(function ($envelope, $queue) {
process_message($envelope->getBody());
$queue->ack($envelope->getDeliveryTag());
});
4.或使用AMQP_AUTOACK
标志消费,但当处理失败时,您将无法再次处理消息:$queue->consume(function ($envelope, $queue) {
process_message($envelope->getBody());
$queue->ack($envelope->getDeliveryTag());
}, AMQP_AUTOACK);
结论:我建议使用#3解决方案,但这取决于您。