Allard Buijze is software architect at Trifork Amsterdam, which delivers software development, consultancy and training services to both national and international organizations. As an architect, he is responsible for the technical choices in his projects and investigates technologies for their potential in the diversity of projects Trifork does. For the last decade, he has been developing and designing enterprise applications for both large-scale and smaller projects. His focus has always been on clean application design, maintainability and testing. The training of co-developers is a very important part thereof.

For several years, he has been investigating and applying CQRS to a number of projects. As a result, he created the Axon Framework, an open source Java framework that helps developers create scalable and extensible applications by providing the building blocks that CQRS based infrastructures typically require. Axon has a growing community and has already been successfully introduced in several projects around the world.

LOCATION: Zürich
KEYWORDS: Concept, Technology

SPEAKER: Allard Buijze   COMPANY: Trifork Amsterdam
SLIDES: 130312_Introduction_to_CQRS_and_Axon_Framework.pdf

Many web applications nowadays are built using the same architectural principles: a layered architecture and, more often than not, an anaemic domain model. Although this style is familiar to many developers and easy to set up, it lacks the capability to help us cope with increasing complexity and doesn't allow applications to scale very well.

In this presentation, Allard will introduce another architectural principle: Command and Query Responsibility Segregation (CQRS). CQRS promotes the decoupling of components that change an application's state (the commands) from the components that provide information about the current state (the queries). This architectural approach makes it easier to handle increasing complexity and ensure the application's ability to scale. You will also see how CQRS can help build high performance applications and provide business value by storing valuable information about the application's history.

During the session, we will also cover the practical aspects and look at what it takes to build a CQRS based application in Java. We will see how the Axon Framework can help Java developers to quickly set up a CQRS infrastructure.

Please note that Allard will also lead a one-day workshop on CQRS and Axon on 13 March 2013 in Zürich. The workshop will help participants to gain deeper knowledge and get practical experience with CQRS concepts and the Axon framework. Workshop and registration details can be found at www.trifork.ch. Don't forget to qualify for a 15% price reduction by mentioning that you are a JUG member in your registration.

After the talk and the following refreshment jug.ch will hold the yearly general meeting.

LEVEL OF TALK: Intermediate
LANGUAGE: Talk: en / Slides: en

Allard Buijze is software architect at Trifork Amsterdam, which delivers software development, consultancy and training services to both national and international organizations. As an architect, he is responsible for the technical choices in his projects and investigates technologies for their potential in the diversity of projects Trifork does. For the last decade, he has been developing and designing enterprise applications for both large-scale and smaller projects. His focus has always been on clean application design, maintainability and testing. The training of co-developers is a very important part thereof.

For several years, he has been investigating and applying CQRS to a number of projects. As a result, he created the Axon Framework, an open source Java framework that helps developers create scalable and extensible applications by providing the building blocks that CQRS based infrastructures typically require. Axon has a growing community and has already been successfully introduced in several projects around the world.

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