CQRS: Designing the Event Store
Posted by Erik Rozendaal mid-afternoon: December 5th, 2009
One of the things I like about CQRS is that many of the infrastructure components become simpler, at least compared to the classical ORM approach. However, some of these components have not seen widespread use in existing enterprise applications and will be new to most people. One such component is the Event Store that is used for persistence of the (transactional) domain in CQRS.
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Domain-Driven Design and Command-Query Separation example application
Posted by Erik Rozendaal in the early morning: December 3rd, 2009
Ever since attending Greg Young's Unshackle Your Domain talk at QCon '08 in San Francisco and a later two-day training course given by Greg Young I've wanted to build a sample application that made use of the principles of Command-Query Responsibility Separation (CQRS).
However, other interesting things intervened and I never got around to doing this.
But every few months we have a one day internal training course at Xebia Software Development and after Sjors Grijpink and I proposed to give a training on DDD and CQRS we got some time to actually prepare and implement a CQRS example application.
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Poster Presentations at the Dutch Java Users Group J-Fall meeting
Posted by Erik Rozendaal in the early morning: November 18th, 2009
Besides organizing a Scala workshop at the J-Fall meeting we also presented five technical posters to serve as discussion points for anyone interested (or just walking by). Unlike traditional meeting sessions we could interact directly, somewhat similar to open space sessions.
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QCon San Francisco 2008 – Unleash Your Domain
Posted by Erik Rozendaal in the late afternoon: November 22nd, 2008
The talk "Unshackle Your Domain" given by Greg Young was the highlight of QCon for me. An architectural approach that is relatively easy to understand, incredibly scalable, and supports a rich domain model. (more...)
QCon San Francisco 2008 – Calling Java
Posted by Erik Rozendaal at around evening time: November 21st, 2008
After two days of QCon you get the feeling that no one is talking about Java anymore. C#, Erlang, F#, Groovy, Ruby, and Scala seem to have taken over. The only new Java stuff being talked about are libraries, application servers, or just IDE improvements. No one is talking about the Java language.
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QCon San Francisco 2008 – Architects & Agilists
Posted by Erik Rozendaal in the wee hours: November 21st, 2008
The QCon San Francisco 2008 conference was opened with an interesting keynote by Rebecca Parsons and Martin Fowler. In their talks they addressed the often strained relationship between traditional architects and agile development and how to improve this relationship to the benefit of both the agile development team and architects. These benefits include cross-project and cross-department knowledge exchange, sharing of the architects many years of experience with the developers, and only working on the architecture that is actually needed. (more...)
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