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http:// twitter.com/ GianArb Queue system gianarb92@gmail .com Gianluca Arbezzano 1 Gianluca Arbezzano @ GianArb http://github.com/gianarb
| Date post: | 28-Nov-2014 |
| Category: |
Technology |
| Upload: | gianluca-arbezzano |
| View: | 731 times |
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Queue system
[email protected] Gianluca Arbezzano
Gianluca Arbezzano@GianArbhttp://github.com/gianarb
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TODO
• Send a mail• Upload big file• Imports• Messagging• …
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Only one Role
You DON’T MAKE to user wait
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Queue System
• Queue• Producer• Consumer• Message
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Queue
ZendQueue\Queue
// Create an array queue adapter$adapter = new ArrayAdapter();
// Create a queue object$queue = new Queue('queue1', $adapter);
Adapter• Db• MongoDb• MongoCappedCollection• ArrayAdapter• TODO: Redis• TODO: RabbitMQ
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Message Queue
Message queues provide an asynchronous communications protocol, meaning that the sender and receiver of the message do not need to interact with the message queue at the same time.
Cit. Wikipedia
ZendQueue\Message\Message implement Zend\Stdlib\Message
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Producer• Send messages quickly
Consumer
• Receive messages• Usually it’s a worker that consumes one
message at time.
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Queue System, when?
Registration Query Mail
• Time-shifts job processing when the “CPU” is less busy• Distributed computing• In a web app allows to run tasks in backgroundreducing the http request time
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Workflow
Registration QuerySend
Message in queue
Send mail
Send mail
Send mail
Send mail
Send mailWORKER
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Worker (old way)
use ZendQueue\Queue;
do {$messages = $queue->receive();//do some worksleep(1);
} while (…)
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Role
• Your adapter implement awaitMessage()• || your queue can emulate await
$adapter->awaitMessages(Queue $queue, $callback, ReceiveParameters $params = null)
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Worker
use ZendQueue\Queue;use ZendQueue\QueueEvent;
$queue->getEventManager()->attach(QueueEvent::EVENT_RECEIVE, function (QueueEvent $e) use ($queue) { $message = $e->getMessages()->current(); //do some work $queue->delete($message);});
//Wait for incoming messages$queue->await();
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Use case overview
• Short run jobs• Long run jobs• Schedule jobs (like cron jobs)
• Enterprise service bus
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Links!
• Use casehttps://github.com/ripaclub/ZendQueue/wiki/Example-Usage
• Proposalhttps://github.com/ripaclub/ZendQueue/wiki/ZendQueue-Proposal
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