RabbitMQ is a message broker that was created in 2007. It facilitates communication between message producers and consumers. Producers publish messages to exchanges, which then route the messages to queues based on bindings. Consumers receive messages from queues. There are different types of exchanges, including direct exchanges which route based on message keys, fanout exchanges which broadcast messages to all queues, and topic exchanges which route based on pattern matching of message routing keys. The document provides code examples for producing and consuming messages using RabbitMQ in Java.

1. RabbitMQ
3th WEEK
SATURDAY, JULY 06, 2013 – SUNDAY, JULY 07, 2013
GEEK ACADEMY 2013

2. RABBITMQ
GEEK ACADEMY 2013

3. MQ History
1985 1993
TIB IBM MQSeries RabbitMQ
2006

4. A
B
C
D
E
Consumers
Producers
Broker
Exchanges
Queues
F
G
H
I
J
Bindings
Channel
Direct Exchange
Fanout Exchange
Topic Exchange
KEY WORDS

5. 01. EXCHANGES
Exchanges are where producers publish their messages.
02. QUEUES
Queues are where the messages end up and are received by consumers.
03. BINDINDS
Bindings are how the messages get routed from the exchange to
particular queues
AMQP ELEMENTS

6. CONSUMERS AND PRODUCERS
10
%
100
%
10
%
10%
10
%
10
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10%
NOT ABOUT
ECONOMICS
AM LP CM KM YH R M HT
Producers create messages and publish (send)
them to a broker server. Then the broker will
determine who(consumers) should get a copy of
messages.
Message = Payload + Label

7. FLOWS
MessageProducer Exchange
QueueBinding Consumer

8. "lightweight connections
that share a single TCP
connection".
CHANNELS
What?

9. DEFAULT EXCHANGE
producer broker consumer
consumer
consumer
geeky2
geeky1
geeky3

10. Demo
ConnectionFactory factory = new ConnectionFactory();
factory.setHost(RABBITMQ_HOST);
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
boolean durable = true;
channel.queueDeclare(queue, durable, false, isAutoDelete, null);
Producer:
o channel.basicPublish( "", queue, null, message.getBytes());
Consumer:
o QueueingConsumer consumer = new QueueingConsumer(channel);
o channel.basicConsume(queue, autoAck, consumer);
o QueueingConsumer.Delivery delivery = consumer.nextDelivery();
o String message = new String(delivery.getBody());

11. DIRECT EXCHANGE
producer broker
consumer
consumer
geeky.jvm
geeky.groovy
geeky.jvm
geeky.java

12. Demo
ConnectionFactory factory = new ConnectionFactory();
factory.setHost(RABBITMQ_HOST);
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "direct");
Producer:
o channel.basicPublish( exchangeName, serevity, null, message.getBytes());
Consumer:
o channel.queueBind(queueName, EXCHANGE_NAME, severity);
o QueueingConsumer consumer = new QueueingConsumer(channel);
o channel.basicConsume(queue, autoAck, consumer);
o QueueingConsumer.Delivery delivery = consumer.nextDelivery();
o String message = new String(delivery.getBody());

13. FANOUT EXCHANGE
producer broker consumer
consumer
consumer
Hello
geeky
Hello
geeky
Hellogeeky

14. Demo
ConnectionFactory factory = new ConnectionFactory();
factory.setHost(RABBITMQ_HOST);
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
channel.exchangeDeclare(EXCHANGE_NAME, "fanout");
Producer:
o channel.basicPublish( EXCHANGE_NAME, "", null, message.getBytes());
Consumer:
o String queueName = channel.queueDeclare().getQueue();
o channel.queueBind(queueName, EXCHANGE_NAME, "");
o QueueingConsumer consumer = new QueueingConsumer(channel);
o channel.basicConsume(queue, isAck, consumer);
o QueueingConsumer.Delivery delivery = consumer.nextDelivery();
o String message = new String(delivery.getBody());

15. TOPIC EXCHANGE
producer broker consumer
consumer
consumer
geeky.#
*.java.*
*.groovy.*
*.*.spring

16. Demo
ConnectionFactory factory = new ConnectionFactory();
factory.setHost(RABBITMQ_HOST);
Connection connection = factory.newConnection();
Channel channel = connection.createChannel();
boolean durable = true;
channel.exchangeDeclare(EXCHANGE_NAME, "topic");
Producer:
o channel.basicPublish( EXCHANGE_NAME, routingKey, null,
message.getBytes());
Consumer:
o String queueName = channel.queueDeclare().getQueue();
o channel.queueBind(queueName, EXCHANGE_NAME, bindingKey);
o QueueingConsumer consumer = new QueueingConsumer(channel);
o channel.basicConsume(queue, isAck, consumer);
o QueueingConsumer.Delivery delivery = consumer.nextDelivery();
o String message = new String(delivery.getBody());

17. Rabbitmqctl
o rabbitmqctl start
o rabbitmqctl stop
o rabbitmqctl list_queues
o rabbitmqctl list_exchanges
o rabbitmqctl list_bindings
o rabbitmqctl list_users
o rabbitmqctl add_user [username] [password]
o rabbitmqctl delete_user [username]
o rabbitmqctl changepassword [username] [new password]

18. 01. http://www.springsource.org/spring-amqp
03.http://www.rabbitmq.com
04.http://hg.rabbitmq.com/rabbitmq-java-client/
READ MORE...
02.https://github.com/SpringSource/spring-amqp
05.https://github.com/up1/geeky_week3_demo

19. GEEK ACADEMY 2013

20. THANK YOU FOR
YOUR TIME
GEEK ACADEMY 2013