Messaging with amqp and rabbitmq
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This document discusses AMQP and RabbitMQ for messaging. AMQP is a networking protocol that enables client applications to communicate with messaging middleware brokers. Brokers receive messages from publishers and route them to consumers. RabbitMQ is an open source message broker that implements AMQP. It discusses using RabbitMQ with various languages like Ruby via libraries like Bunny. It provides examples of broker types, exchanges and queues.
![USING BUNNY
require “bunny”!
#connect to rabbitmq!
conn = Bunny.new!
conn.start!
#create channel!
channel = conn.create_channel!
#create / subscribe to a queue!
queue = ch.queue(“hello”)!
exchange = ch.default_exchange!
#bind queue to an exchange!
queue.bind(exchange, :routing_key =>
severity)
exchange.publish("Hello
World!", :routing_key => queue.name)
queue.subscribe(:block => true) do |
delivery_info, properties, body|!
puts " [x] Received #{body}"!
!
# cancel the consumer to exit!
delivery_info.consumer.cancel!
end](https://image.slidesharecdn.com/messagingwithamqpandrabbitmq-140828124713-phpapp01/85/Messaging-with-amqp-and-rabbitmq-21-320.jpg)
Messaging with amqp and rabbitmq
- 1. MESSAGING WITH AMQP AND RABBITMQ
- 2. What is AMQP? AMQP (Advanced Message Queuing Protocol) is a networking protocol that enables conforming client applications to communicate with conforming messaging middleware brokers.
- 3. WHAT ARE BROKERS Messaging brokers receive messages from publishers (applications that publish them, also known as producers) and route them to consumers (applications that process them).
- 4. EXAMPLE OF BROKERS • RabbitMQ (by VMWARE)! • Microsoft's Windows Azure Service Bus! • Red Hat Enterprise MRG! • StormMQ
- 5. Lorem Ipsum Dolor RABBITMQ Open Source message broker / queueing system written in Erlang implementing AMQP
- 6. Who Uses AMQP • JPMorgan - 1 billion AMQP messages per day; used in dozens of mission critical systems worldwide! • VMware - Makes extensive use of RabbitMQ in its virtualization products and cloud service! • Google! • UIDAI, Government of India - the largest online identity project in the world aiming to provide each of India's 1.2 billion residents with a unique identity number! • AT&T, Smith Electric Vehicles, Mozilla, RED HAT cloud services
- 8. INDUSTRIES Telecommunications, Defense, Manufacturing, Internet and Cloud Computing
- 9. Installing RABBitMQ • MAC OSX - brew install rabbitmq ! • Windows - download the exe
- 11. Enabling the admin console • rabbitmq-plugins enable rabbitmq_management! ! • http://http://localhost: 15672/
- 12. How to talk to RABBITMQ An AMQP Client. Available in most languages.
- 13. Ruby clients • Bunny! • Ruby AMQP Gem
- 14. INSTALLING BUNNY • gem install bunny ! • add to gem file -> gem ‘bunny’
- 15. Lorem Ipsum Dolor AMQP-MODEL • messages can be anything,! plain text, json, bytes, etc.! • Publisher and Consumer are typically decoupled in big apps
- 16. Exchanges and Exchange Types • Direct exchange - specific routing key! • Fanout exchange - braodcast! • Topic exchange - regex style routing key! • Headers exchange
- 17. DIRECT EXCHANGE
- 18. Lorem Ipsum Dolor DIRECT EXCHANGE 2
- 19. Lorem Ipsum Dolor FAN-OUT • leaderboard updates or other global events! • Sport news sites can use score updates to mobile clients in near real-time! • Group chats can distribute messages between participants
- 20. Lorem Ipsum Dolor TOPIC EXCHANGE • delimeter is dots! • * = 1! • # = anything
- 21. USING BUNNY require “bunny”! #connect to rabbitmq! conn = Bunny.new! conn.start! #create channel! channel = conn.create_channel! #create / subscribe to a queue! queue = ch.queue(“hello”)! exchange = ch.default_exchange! #bind queue to an exchange! queue.bind(exchange, :routing_key => severity) exchange.publish("Hello World!", :routing_key => queue.name) queue.subscribe(:block => true) do | delivery_info, properties, body|! puts " [x] Received #{body}"! ! # cancel the consumer to exit! delivery_info.consumer.cancel! end
- 23. FANOUT ❖ cd pubsub! ❖ ruby receive_logs.rb > logs_from_rabbit.log! ❖ ruby receive_logs.rb! ❖ ruby emit_log.rb! ❖ ruby emit_log.rb "Hello my peeps"
- 24. DIRECT (3 receivers) ❖ cd ../routing/! ❖ ruby receive_logs_direct.rb warning error > logs_from_rabbit.log! ❖ ruby receive_logs_direct.rb info warning error! ❖ ruby receive_logs_direct.rb info warning! ❖ ruby emit_log_direct.rb error “Message 1”! ❖ ruby emit_log_direct.rb warning “Message 2”
- 25. TOPIC ❖ cd ../topic/! ❖ ruby receive_logs_topic.rb "#"! ❖ ruby receive_logs_topic.rb "kern.*"! ❖ ruby receive_logs_topic.rb "*.critical"! ❖ ruby receive_logs_topic.rb "kern.*" "*.critical"! ❖ ruby emit_log_topic.rb "kern.critical" "A critical kernel error"
- 26. THE END
- 27. RESOURCES ❖ http://www.amqp.org/! ❖ http://www.rabbitmq.com/! ❖ http://www.rabbitmq.com/getstarted.html! ❖ http://www.rabbitmq.com/tutorials/amqp-concepts.html! ❖ http://rubybunny.info/! ❖ http://rubybunny.info/articles/getting_started.html! ❖ read the bunny docs! ❖ http://www.rubyinside.com/rabbitmq-a-fast-reliable-queuing-option-for- rubyists-1681.html