Udi Dahan discusses the Command Query Responsibility Segregation (CQRS) pattern and its relationship to Domain Driven Design (DDD), detailing on queries and commands, what they are and how they should be used in an asynchronous programming environment.
The Axon framework is a Java implementation of the Command and Query Responsibility Segregation. InfoQ talked with its creator, Allard Buijze, to find out more.
Udi Dahan talks about Command Query Responsibility Segregation (CQRS) and its relationship to Domain Driven Design (DDD). Dahan also discusses his project, the NServiceBus. NServiceBus is an open-source service bus for Microsoft's .NET environment. In many ways, NServiceBus works like Microsoft's Windows Communication Foundation (WCF) and can be used instead of WCF in some cases.
CQRS is gaining popularity as a pattern suited for applications with high scalability and performance needs. In his article “CQRS On Windows Azure”, Mark Seemann uses an example to explore how to use this pattern with Windows Azure as the platform.
The Axon framework from JTeam - an implementation of the CQRS and EDA patterns - has been released.
