RabbitMQ is a message broker that uses AMQP, an open messaging protocol. It is written in Erlang and supports publishing messages to exchanges which then route the messages to queues based on routing rules. PHP applications can interact with RabbitMQ using libraries like PhpAmqpLib which implements the full AMQP specification and allows PHP code to publish, consume, and manage messages and queues.

1. RabbitMQ
AMQP in PHP
Blaž Strmole, Bled, 12. 2. 2015

2. RabbitMQ
● Message broker
● AMQP in še več
● Napisan v Erlang-u
● Open source

3. AMQP
● Advanced Message Queuing Protocol
● AMQP is a networking protocol that enables
conforming client applications to
communicate with conforming messaging
middleware brokers.

4. AMQP - zgodovina
● Zasnovan 2003
● Najprej ga uporabljajo v finančnih aplikacijah
● Nov 2008 izdajo verzijo 0.9.1
● Nov 2011 izdajo verzijo 1.0
● Okt 2012 potrjen kot OASIS standard
● RabbitMQ uporablja 0.9.1

5. AMQP - model
● Publisher pošlje sporočilo v Exchange
(mailbox).
● Glede na routing se sporočilo distribuira v
Queues.
● Broker ga posreduje Consumer-ju ali pa ga
consumer sam potegne iz queue.
● RabbitMq == Exchange + Queues + Broker

6. AMQP - Exchange
● Sporočila so poslana sem.
● Vedno obstaja privzet Exchange
● Tu se izvaja routing.

7. AMQP - direct routing
● Sporočila gredo v določeno vrsto.
● Uporabno za workerje (gearman).
Publisher Queue Consumer

8. AMQP - fanout routing
● Vsako sporočilo gre v več vrst.
● Naredi se kopija sporočila za vsako vrsto.
Publisher Queue2 Consumer2
Consumer1
Consumer3

9. AMQP - topic routing
● Sporočilo gre v eno ali več vrst.
● Kam gre se določi glede na routing key od
sporočila.
● Pravila se določijo v Exchange.

10. AMQP - header routing
● Sporočilo gre v eno vrsto.
● Kam gre se določi s header atributi.
● Podpira any ali all.
● Direct routing on steroids.

11. AMQP - queues
● Jih je potrebno predhodno določiti (declare).
● Imajo več lastnosti:
– Ime
– Persistenco (durable)
– Exclusive
– Auto-delete
– Argumente

12. AMQP - consumers
● Push
● Pull
● Lahko več na eno vrsto
● Exclusive consumer
● Potrditev prejema sporočila
(acknowledgement)
● Zavrnitev sporočila

13. AMQP - connections
● TCP
● Uporabljajo avtentikacijo
● Lahko tudi TLS (SSL)
● Jih je potrrebno zaključevati (close)

14. RabbitMQ - PHP
● Php-amqplib
– Spisana v PHP (5.3)
– Avtor: Alvaro Videla
– Podpira vse kar RabbitMQ
● Pecl AMQP lib
– Bazira na RabbitMQ C AMQP client lib

15. RabbitMQ – Primer publisher
use PhpAmqpLibConnectionAMQPConnection;
use PhpAmqpLibMessageAMQPMessage;
$connection = new AMQPConnection('localhost', 5672, 'guest', 'guest');
$channel = $connection->channel();
$channel->queue_declare('hello', false, false, false, false);
$msg = new AMQPMessage('Hello World!');
$channel->basic_publish($msg, '', 'hello');
echo " [x] Sent 'Hello World!'n";
$channel->close();
$connection->close();

16. RabbitMQ – Primer consumer
use PhpAmqpLibConnectionAMQPConnection;
$connection = new AMQPConnection('localhost', 5672, 'guest', 'guest');
$channel = $connection->channel();
$channel->queue_declare('hello', false, false, false, false);
$callback = function($msg) {
echo " [x] Received ", $msg->body, "n";
};
$channel->basic_consume('hello', '', false, true, false, false, $callback);
echo ' [*] Waiting for messages. To exit press CTRL+C', "n";
while(count($channel->callbacks)) {
$channel->wait();
}
$channel->close();
$connection->close();

17. Vprašanja?
RabbitMQ, AMQP in PHP