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.

Adoption of Agile in Eastern Europe

by Ben Linders on  Mar 21, 2015

The gap in agile adoption between Eastern Europe and the US and Western Europe is becoming smaller. Scrum is the most widespread framework, Kanban adoption is growing and SAFe, LeSS, DAD are trending. The way that companies are transitioning to agile is significantly different in Eastern Europe.

The Benefits of Microservices

by Abel Avram on  Mar 06, 2015 1

Gene Kim (moderator), Gary Gruver, Andrew Phillips and Randy Shoup have discussed some of the benefits of microservices in a recent online panel.

Behaviour-Driven Development Combined with Domain-Driven Design

by Jan Stenberg on  Feb 24, 2015

Behaviour-Driven Development (BDD) is very much about conversations and examples but there is a software design part that can be used to bring BDD and Domain-Driven Design (DDD) practices together, combining the conversional bits with a domain-focused design activity, Konstantin Kudryashov explains in a presentation.

Exploring the Causes of Problems with the Analysis of Competing Hypothesis Method

by Ben Linders on  Feb 13, 2015

The analysis of competing hypotheses (ACH) method can be used to evaluate multiple competing hypotheses when investigating problems. The method mitigates cognitive biases that humans experience when exploring the causes of problems.

Aggregates, Entities and Value Objects in Domain-Driven Design

by Jan Stenberg on  Jan 31, 2015

Move as much as possible of the behaviour away from the Entities into Value Objects when working with Aggregates, As more behaviour is needed this is added as new value objects, Paul Rayner recommends in a series of blog posts covering aggregates, entities and value objects, all concepts from Domain-Driven Design (DDD).

Decentralizing Organizations to Deal with Complexity

by Ben Linders on  Dec 16, 2014 11

Niels Pflaeging, founder of the BetaCodex Network, did the opening talk organize for complexity - how to get life back into work on the second day of the Dare Festival Antwerp 2014. He explained how decentralizing organizations is paramount to increase their performance and agility.

Sharing Data Between Bounded Contexts in Domain-Driven Design

by Jan Stenberg on  Nov 25, 2014 1

When using Domain-Driven Design (DDD) separating the concerns of a large system into bounded contexts with each context using its own data store there is often a need to share some common data. One way of doing that is to let each context publish events about changes, events that others can listen to, Julie Lerman recently explained in MSDN Magazine.

Lean Thinking Applied for Organizational Change

by Ben Linders on  Nov 19, 2014

In lean, we co-design and continuously improve processes and tools to better serve individuals and interactions said Claudio Perrone. Lean views problems as a gap between the current situation and the standard and expectation. Am interview with Claudio about problem solving and learning, and on tools that can be used to apply lean thinking for change in organizations.

Exploring the Hexagonal Architecture

by Jan Stenberg on  Oct 31, 2014

Layered systems are an architectural style used essentially to avoid coupling, the biggest enemy of software maintainability, with Ports and Adapters, or a Hexagonal Architecture, an example of such an architecture, Ian Cooper explains in a presentation about architecture styles, specifically the Hexagonal Architecture.

Domain-Driven Design with Onion Architecture

by Jan Stenberg on  Oct 30, 2014

Domain-Driven Design (DDD) together with Onion Architecture is a combination that Wade Waldron believes has increased his code quality dramatically since he started using it a few years back. Using DDD was a kick-off but together with Onion architecture he found his code to be more readable and understandable, and far easier to maintain.

VersionOne and CA Technologies release a new PPM/APM integrated solution

by Katherine Kirk on  Oct 18, 2014

Last week VersionOne and CA Technologies announced that they have integrated their Project and Portfolio Management (PPM) and Agile Project Management (APM) products to provide an enterprise solution which the two organisations say gives users the ability to have a strategic view of a complete portfolio at the executive level no matter what methodology teams might use.

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