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Experiences Using Event Storming

by Jan Stenberg on  Jun 30, 2016

In the context of Domain-Driven Design (DDD), Event Storming is incredibly useful and valuable, Dan North claimed in his presentation at the recent DDD eXchange conference in London, explaining the basic mechanics of Event Storming and sharing his experiences from modelling different systems during the last few years.

Eric Evans: Is Domain-Driven Design Beneficial for Software Development?

by Jan Stenberg on  Jun 16, 2016 1

The last couple of years the interest in Domain-Driven Design (DDD) has increased, Eric Evans noted in his keynote at the recent DDD eXchange conference in London. He thinks that we are in a time when developers care more about design, partially because we are working more with distributed systems where models have a higher value.

Working with Domain Experts in a DDD World

by Jan Stenberg on  May 31, 2016

Conversations with domain experts and the language used are central in Domain-Driven Design (DDD), but often this is hard because we don’t speak the same language, explained Cyrille Martraire in his presentation at the Domain-Driven Design Europe conference earlier this year when sharing his experiences working with domain experts in DDD-driven environments.

Vaughn Vernon: Challenges in Software Development of Today

by Jan Stenberg on  May 21, 2016

Projects and development teams are struggling with poorly designed systems, with many developers dedicated to patching systems just to keep them alive. Largely the software development culture is broken, Vaughn Vernon claimed in his presentation at the Domain-Driven Design Europe conference earlier this year, talking about problems he has encountered but also about solutions to these problems.

Using Domain-Driven Design When Creating Microservices

by Jan Stenberg on  Feb 16, 2016

Microservices and Domain-Driven Design (DDD) are not only about Bounded contexts, although a fundamental tool for defining granularity of microservices there are other important concepts as well. Correspondingly DDD is just not about entities and repositories, Michael Plöd claimed in his presentation at the recent microXchg conference in Berlin showing how DDD can be used creating microservices.

Combining User Story Mapping with Domain-Driven Design

by Jan Stenberg on  Dec 20, 2015 1

User Story Mapping can be a simple yet valuable pattern when adopting Domain-Driven Design (DDD) in projects dealing with complex domains. It can help creating shared domain knowledge among developers and domain experts, Eriksen Costa claims in a blog post discussing advantages combining User Story Mapping with Domain-Driven Design (DDD).

Moving from a Monolithic to a Microservices Architecture

by Jan Stenberg on  Dec 13, 2015 1

Moving from a monolith to microservices the only value business stakeholders care about is reducing cost. It will not increase or protect revenue and neither scaling nor distribution are good reasons that will convince the business, Ian Cooper claimed in his presentation at this year’s Microservices Conference in London describing guidelines moving from a monolith to a microservices architecture.

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.

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 2

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.

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.

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.

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