I’ve opened a Github account where i keep some stuff I’ve been playing with recently. At the moment is mostly related to doing DDD with CQRS and Event Sourcing.

I’ve created a sample project to demonstrate the concepts. Here is a short description of the sample:

Sample project demonstrating CQRS & Event Sourcing
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The sample uses the following projects from Jonathan Oliver (https://github.com/joliver)

* EventStore
* NanoServiceBus
* CommonDomain
* StorageAccess

For more information on CQRS and Event Sourcing http://cqrsinfo.com/

A short description of the projects in the sample:

a. Write Side

    1. Sample.DomainModel
        – the domain model for the sample
        – this model is persisted using event sourcing and does not need to handle reads ( queries )
        since they are done on the read side.
        – the resulting event stream is the "source of truth" data.

    2. Sample.AppService
        – the handlers for the commands our domain knows to execute

    3. Sample.AppServiceHost
        – infrastructure for wiring up the command handlers to NanoServiceBus
        – this is the actual instance of the service that needs to be running for the write side to process
        commands.

b. Read Side

    1. Sample.ReadModel
        – the read model on witch queries are executed
        – this model should be mapped as close as possible to the views
        – this model can be regenerated from the event stream

    2. Sample.Denormalizer
        – the event handlers for the domain events that are published by the DomainModel on the Write Side
        – this handlers keep the read model in sync with the event stream
        – a better name for it is welcome

    3. Sample.DenormalizerHost
        – infrastructure for wiring up the event handlers to NanoServiceBus
        – this process needs to run for the read side to be updated.

c. Infrastructure
    1. Sample.Messages
        – definitions for commands and events that are handled or published by the Domain Model
    2. Sample.Client.Web
        – ASP.NET MVC3 application that demonstrates how to integrate the Write Side & the Read Side in an application.

TODO
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- Add more complex objects to the domain
- Review transaction management on integration points
- use ConfOrm for mapping the read model

I’d be glad if other shared their comments on the code there.