Web Front-End CQRS

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Emil Cardell

My Web Front-End CQRS slides from Devsum 2012

Technology Business

Command and Query
Responsibility Segregation

Commands can’t return data
Queries can only return data

Command Handlers
Event Handlers
Service bus
Message queue
Event stores
Projections

NServiceBus
MassTransit
MsMQ
EventStore
RabbitMQ
Common Domain

Emil Cardell
@emilcardell
unwillingcoder.tumblr.com

Reliability is to never loose
data and to never go down
even if hardware goes down

Scalability to scale linear by
distributing you application
to multiple servers

Separate in to parts only
responsible for one thing

It gives us focus to deliver
value faster

How does a distributed
system effect the UI?

Speak the same language as
our domain. There is nothing
in our domain called
controller.

Separation of concerns
one class = one function
RESTish
methods = http methods

Have courage to experiment,
respect your peers and keep
it simple

Emil Cardell
@emilcardell
unwillingcoder.tumblr.com

http://mvc.fubu-project.org/
http://jquery.com/
http://benalman.com/projects/jquery-
message-queuing-plugin/

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