This document discusses using RabbitMQ for messaging between applications. It begins with an introduction to the presenter and agenda. It then contrasts traditional RPC-style calls with messaging and covers some benefits of messaging like decoupling and flexibility. Common messaging patterns like publish/subscribe, topics, and work queues are introduced. The AMQP protocol and RabbitMQ implementation are explained. Finally, a demo of RabbitMQ is promised along with Q&A.

1. Multiply Like Rabbits with
RabbitMQ

2. WHO AM I?
• Luis Majano
• Born in El Salvador ------------------>
• Architecture + Software Design
• CEO of Ortus Solutions
• Adobe Community Professional
• Creator of all things Box:
ColdBox, ContentBox, CommandBox....

3. AGENDA
• Traditional RPC Calls
• What is Messaging all about
• Different Implementations
• AMQP Protocol
• RabbitMQ
• Demo

4. TRADITIONAL RPC STYLE CALLS
Obj Obj
Obj

6. • Blocks Requests
• Asynchronous, partial solution, still 1-1 relationship
• Sender always knows about receiver
• Receiver knows about sender
PROBLEMS WITH RPC
How can we decouple knowledge?
How can we apply messaging patterns to our apps?

7. Messaging (EMB)
Producer
Consumer Consumer Consumer
Messaging Bus - Broker
Can be
any system or
language
Can be
any system or
language
Doesn’t
care about
consumers
Asynchronous
Does not get a
response

8. • Producers lack knowledge -> Decouple
• Cross platforms-technologies -> Flexibility
• Event Driven Programming -> Scalability
• Queueing for later delivery
• Asynchronous
• Load balancing
• Hulkyfied services

9. Usages and Patterns

10. Direct Messaging

11. Work Queues

12. Publish/Subscribe

13. Topics/Routing

14. Protocols
JMS AMQP STOMP

15. AMQP - www.amqp.org
• Advanced Message Queuing Protocol
• != JMS
• Standard binary protocol
• Exchanges
• Queuing
• Routing
• Reliable
• Secure
• Several Implementations
RabbitMQ
ActiveMQ
Qpid
StormMQ

16. AMQP Messaging Broker
Erlang
Extremely fast, reliable and secure
Languages: c#, erlang, java, python, ruby, node, etc
Accepts and forwards messages
Its like a post box, post office and postman

17. HOW IT WORKS?
Producer
Message
(Body+Routing Key)
Exchange (Bindings via Routing Key)
Body = binary, json,
anything
stock.
prices
stock.
run
log.
error
cluster
Queues are bound to exchanges with patterns
Routing key =
Bindings
Queues

18. • Direct
• Routing key = queue name
• No mapping or extra fluff just a passthrough
• Similar to JMS
• Topic
• Binding pattern (routing key) is match against the queue name
• Not full regex
• Ex: log.*, log#
• Not like JMSTopics, forget JMS, this is not JMS
• Fanout + More
EXCHANGETYPES

19. LOAD BALANCING + ACK
Worker
Queue
Consumer
Consumer
Consumer
Messages are
round-robin
to each
consumer
Consumer
need to ack

20. DEMOTIME
• Java Producer
• Java Consumer
• CFML Consumer
• NodeJS Consumer
• JavaScript Consumer
• CFML Producer

21. Q & A
• RabbitMQ In Action Book
• http://www.rabbitmq.com
• http://tryrabbitmq.com/
• https://github.com/RabbitMQSimulator/RabbitMQSimulator
• http://koo.fi/blog/2013/02/18/web-messaging-with-rabbitmq-web-stomp-and-
sockjs/
• https://github.com/robharrop/presentations.git