Prasun from barter.li talking about how they implemented RabbitMQ chat in their app

2. Building RabbitMQ based Chat on
barter.li Android App

3. Why RabbitMQ for Chat
● Fast, reliable, guaranteed & scalable chat
● Mobile, Web compatibility
● Messages, pics, audio, video transfer etc.
● No dependence on Google services

4. RabbitMQ
● Uses AMPQ protocol
● Built with Erlang
Founded by Rabbit Technologies in year 2007

5. Why AMPQ
● IBM MQSeries
● Microsoft Message Queue
● Java Message Service

6. Other Vendors
● Apache qpid
● Apache apollo
● Windows Azure Service Bus

7. AMPQ
● Started by JPMorgan Chase with iMatix Corporation and
evolved to develop an open standard
● Allows different MQ vendors communicate with each other

8. Why Erlang?
● Developed by Ericsson
● Good at distributed computing
● Used by Facebook, What’s App
● Open Telecom Platform

9. Important Things
● Queues
● Exchanges
● Bindings

10. Exchanges
● Topic
● Fanout
● Direct
● Headers

11. Android and Rabbitmq
● The java client library is not mobile optimized
● Unreliable tcp (Transmission Control Protocol) connection
● Heavy weight

12. Issues Faced
● Need to handle frequent tcp connection failure
● Different device login and round robin issues
● Maybe not meant for chat

13. Solution
● Heartbeat for tcp issues
● Unique queue names for different devices with same id.
● Fanout messaging

14. Alternatives
● MQTT: Message Queuing Telemetry Transport
● Faye: Simple pub/sub messaging

15. References
● https://groups.google.com/forum/#!forum/ruby-amqp
● http://www.linkedin.com/groups/RabbitMQ-2830653
● https://github.com/intrepidkarthi/RabbitMQ-Android-Chat
● http://rubyamqp.info/
● rabbitmq.1065348.n5.nabble.com/previous-connection-is-NOT-automatically-
closed-if-IP-different-td31096.html

18. Android
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