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I'm trying to understand the concepts behind DDD, but I find it hard to understand just by reading books as they tend to discuss the topic in a rather abstract way. I would like to see some good implementations of DDD in code, preferably in C#.
Are there any good examples of projects practicing DDD in the open source world?
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Domain Driven Design (DDD) has recently gained additional popularity, as evidenced by new books, conference talks, and even complete conferences dedicated to it), and lots of trainings – including some by our very own colleagues here at INNOQ.
Domain-driven design is perfect for applications that have complex business logic. However, it might not be the best solution for applications with minor domain complexity but high technical complexity. Applications with great technical complexity can be very challenging for business-oriented domain experts.
An aggregate is a domain-driven design pattern. It's a cluster of domain objects (e.g. entity, value object), treated as one single unit. A car is a good example. It consists of wheels, lights and an engine.
Modern Software Architecture with Domain Driven Design (DDD). Introduction on DDD and its relation to Microservices, Reactive Systems, BPM, Agile, CQRS and Event Sourcing. Welcome to the first issue on Modern Software Architecture.
Eric Evans and a Swedish consulting company have released a sample application based on the shipping example that Eric uses throughout the book. It's in Java, but the concepts are well documented on the project page.
http://dddsample.sourceforge.net/
However, be warned that DDD is more about the journey than the destination. Understand that the sample code you are looking took many forms before it became what you see now. You did not see the awkward models that were used initially and you're missing the steps taken to refactor the model based on insight gained along the way. While the building blocks are important in DDD, Eric belives they are over-emphasized, so take all samples with a grain of salt.
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I'm not sure how complete it is, but I found the NDDD Sample on Google Code.
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