Domain Events and Eventual Consistency

by Jan Stenberg on  Sep 27, 2015 1

Eventual consistency is a design approach for improving scalability and performance. Domain events, a tactical element in Domain-Driven Design (DDD), can help in facilitating eventual consistency, Florin Preda and Mike Mogosanu writes in separate blog posts, each describing the advantages achievable.

Nexus Guide for Scrum is Published

by Ben Linders on  Sep 10, 2015 2

Nexus is a framework for developing and sustaining large software development projects. The Nexus Guide can be used next to the Scrum Guide to scale Scrum and support the integrated effort of multiple software development teams.

Playing Games with the Agile Essentials

by Ben Linders on  Sep 07, 2015

The agile essentials from Ivar Jacobson International is a starter kit of agile practices, provided as a deck of cards. Teams can play games with these cards to learn agile practices and inspect and adapt their way of working.

Dino Esposito on CQRS, Messages and Events

by Jan Stenberg on  Aug 31, 2015 1

Command Query Responsibility Segregation (CQRS) is the starting point of a change that will have a profound impact on system architecture, Dino Esposito claims in three articles in MSDN Magazine. It’s the first step in an evolution transitioning software architects from the idea of “models-to-persist” to the idea of “events-to-log” and about event-based data instead of data snapshots.

Introducing DDD in a Project at “Which?”

by Jan Stenberg on  Aug 16, 2015 1

After failing with two proof of concept, mainly with scalability issues, when trying to renew their main website the business decided to take a more agile and incremental approach and in a restart of the project inspired by Domain-Driven Design (DDD) having developers talk with domain experts, Chris Patuzzo explains describing the principles of DDD in the context of a real project.

Six Ways of Improving Behaviour-Driven Development

by Jan Stenberg on  Jul 31, 2015

Remembering that automation is a side benefit and not the reason for BDD is one improvement to more closely follow the recommendations of BDD thought leaders, Joe Colantonio explains noticing six ways of improving work with a BDD mindset.

10 Common DDD Mistakes to Avoid

by Jan Stenberg on  Jul 12, 2015 2

Not interacting with domain experts is one of a common set of mistakes done when using Domain-Driven Design (DDD), finding and correcting them early on may save a team time, Daniel Whittaker claims describing ten mistakes he regularly see developers do.

Udi Dahan on Reuse in Business Logic and Microservices

by Jan Stenberg on  Jul 05, 2015 3

Reuse has been a watch word for almost everything that has happened in system development during the last thirty years, but reuse is like cyanide; in really small portions it can be healthy, using it too much it starts doing a lot of damage, Udi Dahan claimed in his presentation giving a different perspective on business logic at this year’s DDD Exchange conference in London.

DDD, Events and Microservices

by Jan Stenberg on  Jun 29, 2015 1

To make microservices awesome Domain-Driven Design (DDD) is needed, the same mistakes made 5-10 years ago and solved by DDD are made again in the context of microservices, David Dawson claimed in his presentation at this year’s DDD Exchange conference in London.

Protocol-Oriented Programming in Swift

by Sergio De Simone on  Jun 18, 2015 2

At WWDC 2015, Dave Abrahams, of C++/Boost fame and now lead of the Swift Standard Library group at Apple, introduced Swift as a Protocol-oriented language, and showed how protocols can be used to improve your code.

DDD and Living Documentation

by Jan Stenberg on  Jun 15, 2015 4

Creating documentation is boring, it's often obsolete and misleading but with a new mindset both your documentation and code can improve, Cyrille Martraire explained in a presentation showing how to create living documentation when working with Domain-Driven Design (DDD) at this year’s DDD Exchange conference in London.

Eric Evans on DDD, Microservices and Boundaries

by Jan Stenberg on  Jun 14, 2015 4

There is tremendous value in microservices, probably giving us the best environment we have ever had for doing Domain-Driven Design (DDD), Eric Evans stated in his keynote at this year’s DDD Exchange conference in London. Iteration is the most important key to good design and microservices is the second attempt, after SOA, to get things right.

Domain-Driven Design the Wrong Way

by Jan Stenberg on  Apr 26, 2015 2

Applications claimed to have been built using Domain-Driven Design (DDD) in reality often consists of entities or DTOs separating data and logic together with services containing a mix of business and infrastructure logic, Gabriel Schenker states, noting that this also often applies early on to projects building new applications. Lack of knowledge is one major reason for this, Schenker believes.

Avoid a Canonical Data Model

by Jan Stenberg on  Apr 12, 2015 16

Standardizing on common models for business objects that are exchanged within an enterprise, e.g. Customer, Order and Product together with the attributes and associations they have, might seem compelling but for Stefan Tilkov this creation of Canonical Data Models (CDMs) is a horrible idea which he strongly advices against.

Clarifying Domain-Driven Design Using a Trading Application Example

by Jan Stenberg on  Mar 24, 2015

Domain-Driven Design (DDD) is an approach to building software emphasizing collaboration between domain experts, developers and others involved in order to meet business objectives, Naresh Bhatia explains introducing the DDD base concepts exemplifying with Bullsfirst, an example system of medium complexity from the financial trading domain.

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