This document discusses RabbitMQ, an open source message broker. It describes how RabbitMQ allows applications to communicate asynchronously by sending and receiving messages through queues. It provides examples of different RabbitMQ exchange types including fanout, direct, and topic exchanges to illustrate how messages can be routed from producers to consumers. The examples are implemented in PHP using the AMQP library to demonstrate basic usage of RabbitMQ for message queuing and scaling applications.

1. What RabbitMQ
Can Do For You
James Titcumb
PHPNW14 Unconference

2. Who is this guy?
James Titcumb
www.jamestitcumb.com
www.protected.co.uk
www.phphants.co.uk
@asgrim

3. What is message
queueing?

4. Separation of Concerns

5. Scaling with Rabbit
Application RabbitMQ
Background processing

6. Scaling with Rabbit
Application RabbitMQ
Background processing
Background processing

7. Scaling with Rabbit
Application RabbitMQ
Background processing
Background processing
Background processing

8. Scaling with Rabbit
Application RabbitMQ
Background processing
Background processing
Background processing
Background processing

9. Scaling with Rabbit
Application RabbitMQ
Background processing
Background processing
Background processing
Background processing
Background processing

10. Some real world uses?

11. Installing RabbitMQ
(on precise64, other OSs may vary)

12. Using Apt
● add apt repo
○ deb http://www.rabbitmq.com/debian/ testing main
● add signing key
○ http://www.rabbitmq.com/rabbitmq-signing-key-public.asc
● apt-get update
● apt-get install rabbitmq-server
● rabbitmq-plugins enable rabbitmq_management
● sudo service rabbitmq-server restart

14. Basic Message Queuing

15. Objective: Basic Queuing
test_queue
1 2 3 4 5
Producer Consumer

16. composer.json
{
"require": {
"videlalvaro/php-amqplib": "2.*"
}
}
then composer install

17. Please wait, connecting...
use PhpAmqpLibConnectionAMQPConnection;
$connection = new AMQPConnection(
'localhost',
5672,
'guest',
'guest',
'/'
);
$channel = $connection->channel();

18. basic/producer.php
use PhpAmqpLibMessageAMQPMessage;
$channel->queue_declare(
'test_queue',
false,
true,
false, false);
$message = new AMQPMessage('my test message');
$channel->basic_publish($message, '', 'test_queue');

19. basic/consumer.php
$channel->basic_consume(
'test_queue', // Queue to consume
'', // Consumer identifier
false,
true, // No-ack means messages are "auto acknowledged"
false, // Exclusive - no other consumers can use the queue
false,
function(AMQPMessage $message) {
echo $message->body . "n";
}
);
while (count($channel->callbacks)) {
$channel->wait();
}

20. What to expect...

21. Exchanges: Fanout

22. Objective: Fanout Exchange
test_exchange
amq.KfgPZ3PE
amq.cK5Cp3FC
Consumer
Consumer
Producer
1
1
2
2
3
3
4
4
5
5

23. fanout/producer.php
use PhpAmqpLibMessageAMQPMessage;
$channel->exchange_declare(
'test_exchange',
'fanout',
false, false, false);
$message = new AMQPMessage('my test message #' . $id);
$channel->basic_publish($message, 'test_exchange');

24. fanout/consumer.php
$q = $channel->queue_declare(
'', // Lets RabbitMQ pick a name for queue
false, false, false,
true // Delete this queue
);
$queue_name = $q[0];
$channel->exchange_declare(
'test_exchange', 'fanout', false, false, false);
$channel->queue_bind($queue_name, 'test_exchange');

26. Temporary Queues
Producer test_exchange
Messages
go nowhere

27. Exchanges: Direct

28. Objective: Direct Exchange
test_direct
BK = banana, apple
BK = apple
Consumer
Consumer
Producer
BK = orange, banana,
apple
Consumer

29. Objective: Direct Exchange
test_direct
BK = banana, apple
BK = apple
Consumer
Consumer
Producer
MESSAGE
ROUTING KEY
= ORANGE
BK = orange, banana,
apple
Consumer

30. Objective: Direct Exchange
test_direct
BK = banana, apple
BK = apple
Consumer
Consumer
Producer
MESSAGE
ROUTING KEY
= BANANA
BK = orange, banana,
apple
Consumer

31. Objective: Direct Exchange
test_direct
BK = banana, apple
BK = apple
Consumer
Consumer
Producer
MESSAGE
ROUTING KEY
= APPLE
BK = orange, banana,
apple
Consumer

32. direct/producer.php
$channel->exchange_declare(
'test_direct', 'fanout', false, false, false);
$messageContent = 'my test message, key=' . $routingKey;
$message = new AMQPMessage($messageContent);
$channel->basic_publish($message, 'test_direct', $routingKey);

33. direct/consumer.php
$q = $channel->queue_declare('', false, false, false, true);
$queue_name = $q[0];
$channel->exchange_declare(
'test_direct', 'direct', false, false, false);
// Bind for each routing key we want (BINDING KEY)
$channel->queue_bind($queue_name, 'test_direct', 'apple');
$channel->queue_bind($queue_name, 'test_direct', 'orange');
$channel->queue_bind($queue_name, 'test_direct', 'banana');

35. Exchanges: Topic

36. Objective:
Topic Exchange
test_topic
BK = *.vegetable
BK = #
Consumer
Consumer
Producer
BK = green.#
Consumer
BK = *.grass.* / *.*.long
Consumer

37. Objective:
Topic Exchange
test_topic
BK = *.vegetable
BK = #
Consumer
Consumer
Producer
RED.VEGETABLE
BK = green.#
Consumer
BK = *.grass.* / *.*.long
Consumer

38. Objective:
Topic Exchange
test_topic
BK = *.vegetable
BK = #
Consumer
Consumer
Producer
GREEN.VEGETABLE
BK = green.#
Consumer
BK = *.grass.* / *.*.long
Consumer

39. Objective:
Topic Exchange
test_topic
BK = *.vegetable
BK = #
Consumer
Consumer
Producer
GREEN.GRASS.LONG
BK = green.#
Consumer
BK = *.grass.* / *.*.long
Consumer

40. Have a go yourself!
https://github.com/asgrim/rmq-slides

41. Questions?

42. Thanks for watching!
James Titcumb
@asgrim