DDD Perth 2016 Agenda

Command Query Responsibility Segregation (CQRS) is an important architectural pattern for enterprise applications. It offers a number of important benefits for more complex and collaborative applications. This presentation will give a quick introduction to and overview of CQRS within a Domain Driven Design (DDD) context. CQRS applications can also benefit from the use of Event Sourcing (ES). This presentation will give an introduction to and overview of CQRS using Event Sourcing. However, the second part of the presentation will be an investigation of whether events are the ultimate and most timeless way to persist application state (without actually persisting application state). The ability to construct and reconstruct data stores on the read-side enables post-hoc optimisations of data representation for queries. The ability to change paradigms on the application write-side means that the data representation is perhaps even more powerful and timeless than relational stores.