RabbitMQ and EasyNetQ

Ken Taylor (@taylorka)reQuire LLC

“Messaging that just works”

RabbitMQ: Who, What?

• Developed by SpringSource • Written in Erlang• Message Broker (MOM)• Advanced Message Queuing Protocol

(AMQP)

RabbitMQ: Who, What?

• NASA NEBULA Cloud Computing• AMQP Sponsors–Microsoft–Bank of America–JPMorgan Chase–Et. Al.

RabbitMQ: Why?

• Distributed• Asynchronous• Easy to use• Highly fault tolerant

RabbitMQ: Why?

"The world is concurrent. Things in the world don't share data. Things communicate with messages. Things fail.“

- Joe Armstrong

RabbitMQ: The Basics

• Exchanges• Queues• Routing• Channels• Virtual Hosts

Mailbox, Postman & Post office

Exchange Types

• Direct• Fanout• Topic• Headers

Direct Exchange

Headers exchange routing

• Ignores routing key• Headers attributes used for routing• Can bind a queue using one or more headers• Can route on other values– Integer – Hash/Dictionary– Others

Topic exchange routing

• Routing to 1 or more queues– Message routing key– Pattern for queue binding

• Multicast Routing• Consumers choose message to receive

Queues

• Store messages• Consumed by applications• Have properties– Durable– Exclusive– Auto-delete

• Declared before use

Channels & Virtual Hosts

• Channels– Lightweight connections that share a single TCP

connection• Virtual Hosts– Allows broker to host multiple environments– Similar to virtual hosts on IIS

EasyNetQ: Who, What?

• Open source (easynetq.com)• Written by Mike Hadlow– github.com/mikehadlow

• NuGet Package• Sponsored by 15below.com

EasyNetQ: Who, What?

• Simple .NET API• Opinionated Implementation– Trades flexibility for simplicity

• Simple conventions– Messages should be represented by .NET types. – Messages should be routed by their .NET type.

EasyNetQ: Why?

• Easy to install• Less code• Serializes to JSON• Simple conventions

DEMO

How can I use it today?

• Download Erlang OTP– Erlang.org

• Download RabbitMQ– Rabbitmq.com

• Install EasyNetQ with NuGet– “Install-Package EasyNetQ”

Questions?

• Important Links– Rabbitmq.com– Erlang.org– EasyNetq.com

• About Me– Ken Taylor (Twitter @taylorka)– Switchspan.com