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Architecture & Design Follow 2015 Followers

Business Processes, Long-Running Services and Microservices

by Jan Stenberg Follow 33 Followers on  Jun 28, 2018 2

During recent years domain events are increasingly being discussed, but we should be discussing commands just as much, Martin Schimak explained at the recent DDD eXchange 2018 conference, where he covered events, command and long-running services in a microservices world, and how process managers and similar tooling can help in running core business logic.

Architecture & Design Follow 2015 Followers

Strategies for Decomposing a System into Microservices

by Jan Stenberg Follow 33 Followers on  Jun 21, 2018

A couple of years ago, Vladik Khononov and his team decided to start using microservices, but a few months later they found themselves in a huge mess. They concentrated on new cool technologies instead of thinking about how to decompose a system into microservices — finding the boundaries and where different functionalities should be located among these boundaries.

DevOps Follow 766 Followers

Too Many Scripts Can Kill Your Continuous Delivery

by Manuel Pais Follow 9 Followers on  Jun 19, 2018

Avantika Mathur spoke at Continuous Lifecycle London last month on the costs associated with an ever increasing number of scripts in a Continuous Delivery pipeline. Besides the cost of maintaining the scripts, the lack of visibility and auditability on exactly what activities are being carried out before deploying a change to production is another major cost not many organizations are aware of.

Architecture & Design Follow 2015 Followers

Designing Reactive Systems Using DDD, Event Storming and Actors

by Jan Stenberg Follow 33 Followers on  Mar 27, 2018

Domain-driven design (DDD) is often used for finding boundaries (bounded contexts) around microservices. But everything in domain-driven design (DDD) is not good for microservice, Lutz Huehnken claimed in a presentation at microxchg 2018 in Berlin where he discussed how DDD, Event Storming and the Akka-based Lagom framework can be used to build reactive systems.

Culture & Methods Follow 621 Followers

Jeff Patton on Fixing Agile Product Ownership

by Shane Hastie Follow 18 Followers on  Mar 23, 2018

At the recent Agile India conference, Jeff Patton gave a keynote talk in which he challenged the way agile development approaches Product Ownership. He holds that product management is a discipline which was around before the Scrum term Product Owner was coined, and the way it has been applied in most agile organisations is, at best, a watered-down approach and real product management is needed.

Architecture & Design Follow 2015 Followers

QCon London: Asynchronous Event Architectures with or without Actors

by Jan Stenberg Follow 33 Followers on  Mar 13, 2018

Synchronous request-response communication in microservices systems can be really complicated. Fortunately, asynchronous event-based architectures can be used to avoid this, Yaroslav Tkachenko claimed in a presentation at QCon London 2018, where he described his experiences with event-driven architectures and how Actors can be used in systems built on this architecture.

Culture & Methods Follow 621 Followers

Alan Cooper on Working Backwards for Better Product Design

by Shane Hastie Follow 18 Followers on  Mar 12, 2018

At the Agile India conference, design expert Alan Cooper gave a keynote talk on Working Backwards in which he described an approach to design and innovation centered on three key elements: know your user and their goals, see possible solutions, and see the big picture.

Culture & Methods Follow 621 Followers

Why Software Developers Should Take Ethics into Consideration

by Ben Linders Follow 23 Followers on  Mar 08, 2018 2

Most of the software that influences the behavior of human beings wasn’t created with strong ethical constructs around it. Software developers should ask themselves ethical questions like “who does this affect?”, “who could get hurt by this?”, and “who does this disadvantage or advantage?”, try to answer them, and be comfortable with questions they can’t answer yet.

Culture & Methods Follow 621 Followers

Q&A with Laura Bell on Continuous Security at QCon London

by Laura Bell Follow 1 Followers , Rafiq Gemmail Follow 6 Followers on  Mar 07, 2018

Q&A with Laura Bell at QCon London. We discuss her keynote, continuous security and her own professional security journey.

Architecture & Design Follow 2015 Followers

Notes From the DDD Europe 2018 Conference

by Jan Stenberg Follow 33 Followers on  Feb 24, 2018

The recently held DDD Europe 2018 conference in Amsterdam was the third in order and saw almost 700 attendees. The conference has a focus on Domain-Driven Design (DDD), and included four keynotes, 19 presentations, one track for open space and 17 sessions focused on live coding or hands-on. Notable speakers included Eric Evans, Dave Snowden, Rebecca Wirfs-Brock and Cyrille Martraire.

Architecture & Design Follow 2015 Followers

Finding Bounded Contexts Using Domain Storytelling

by Jan Stenberg Follow 33 Followers on  Feb 14, 2018

When working with Domain-Driven Design (DDD), bounded context is a core concept. Domain storytelling is a way of finding how people and systems work together within a domain which then can be used to identify the bounded contexts and how they are interconnected, Stefan Hofer and Henning Schwentner explained at the recent DDD Europe 2018 conference in Amsterdam.

Architecture & Design Follow 2015 Followers

Retroactive and Future Events in an Event Sourced System

by Jan Stenberg Follow 33 Followers on  Feb 09, 2018

When Thomas Pierrain started a new project with an asset management company, one important requirement was the ability to go back in time to understand why they took decisions that today look strange. At the recent DDD Europe 2018 conference in Amsterdam, Pierrain discussed his experiences when building an event sourced system that included some temporal challenges.

Architecture & Design Follow 2015 Followers

Evolving CQRS and Event Sourced Systems

by Jan Stenberg Follow 33 Followers on  Feb 07, 2018

After talking with people about upgrading of CQRS and event sourced systems, Michiel Overeem came to the conclusion that many working with event sourced systems lack an understanding and don’t know how to approach the problem. At the recent DDD Europe 2018 conference in Amsterdam he described how this was a trigger for him to do an exploratory research on how to evolve this kind of system.

Architecture & Design Follow 2015 Followers

Eric Evans: Practicing Domain-Driven Design

by Jan Stenberg Follow 33 Followers on  Feb 06, 2018

For Eric Evans, who gave a keynote at the recent DDD Europe 2018 conference in Amsterdam, it’s important to explore and practice building software. He enjoys working with strategic patterns in Domain-Driven Design (DDD), but what he finds really interesting is taking a difficult domain and reason about it differently; breaking out of the mental box trying to find new concepts.

Culture & Methods Follow 621 Followers

How Technical Practices Support Evolutionary Architecture and Continuous Delivery

by Ben Linders Follow 23 Followers on  Dec 21, 2017

Technical practices of XP such as TDD, Refactoring, CI and Pair Programming support emergent design and enable evolving your architecture. The first practice you need for continuous delivery is CI, committing to mainline every day. Being able to write clean, well-factored, and well-tested modular code is the most important skill for developers.

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