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Culture & Methods Follow 671 Followers

How No and Low Code Approaches Support Business Users and Professional Developers

by Ben Linders Follow 25 Followers on  Jul 12, 2018 2

No code approaches aim to support business users in developing and maintaining their own applications, where low code simplifies the developer’s work and makes them more productive. Both approaches enable faster development at lower costs. As the distinction between these approaches is becoming smaller, business users and developers can team up and use them together.

Architecture & Design Follow 2125 Followers

Business Processes, Long-Running Services and Microservices

by Jan Stenberg Follow 34 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 2125 Followers

Strategies for Decomposing a System into Microservices

by Jan Stenberg Follow 34 Followers on  Jun 21, 2018 2

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.

Architecture & Design Follow 2125 Followers

Designing Reactive Systems Using DDD, Event Storming and Actors

by Jan Stenberg Follow 34 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.

Architecture & Design Follow 2125 Followers

QCon London: Asynchronous Event Architectures with or without Actors

by Jan Stenberg Follow 34 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.

Architecture & Design Follow 2125 Followers

Notes From the DDD Europe 2018 Conference

by Jan Stenberg Follow 34 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 2125 Followers

Finding Bounded Contexts Using Domain Storytelling

by Jan Stenberg Follow 34 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 2125 Followers

Retroactive and Future Events in an Event Sourced System

by Jan Stenberg Follow 34 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 2125 Followers

Evolving CQRS and Event Sourced Systems

by Jan Stenberg Follow 34 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 2125 Followers

Eric Evans: Practicing Domain-Driven Design

by Jan Stenberg Follow 34 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.

JavaScript Follow 383 Followers

Firefox Quantum Commits to Cross-Browser Extension Architecture

by Kevin Ball Follow 3 Followers on  Dec 19, 2017 1

With the Firefox 57 “Quantum” release, Firefox now only supports extensions based on the WebExtensions API, joining Chrome and Edge in supporting extension development with pure HTML, CSS, and JavaScript based on a cross-browser shared extension architecture.

Architecture & Design Follow 2125 Followers

Selecting an Event Architecture

by Jan Stenberg Follow 34 Followers on  Aug 24, 2017

When designing a distributed system, maybe based on microservices, and you are considering an event architecture, there are several models and technologies available. When choosing how to implement the architecture the non-functional requirements are a main factor, David Dawson claims when describing different styles of event architectures in a recent blog post.

Culture & Methods Follow 671 Followers

First Annual Retrospective Report Published

by Ben Linders Follow 25 Followers on  Aug 07, 2017

The First Annual Retrospective Report provides a deeper understanding of how retrospectives are used in the real world. The results indicate that retrospectives lead to improved team communication and productivity and help to create an environment of trust. Major challenges are that topics discussed cannot be solved by the team and people do not feel comfortable speaking up.

Architecture & Design Follow 2125 Followers

Process Managers in Event-Based Systems

by Jan Stenberg Follow 34 Followers on  Jul 28, 2017 1

Publishing events to notify about changes in a domain keeps different domains decoupled from each other, but if there really is a logical flow of events it becomes implicit and hard to follow. A better solution is to use a Process Manager to keep track of the overall process, Bernd Rücker stated in his presentation at this year’s DDD eXchange conference.

Architecture & Design Follow 2125 Followers

Capture - Embed - Protect, Guidelines for Domain-Driven Design

by Jan Stenberg Follow 34 Followers on  Jul 07, 2017

When using the core philosophy and the practices of DDD as guidelines for software design and development, they can be summarized in three principles: Capture – Embed – Protect, Steven A. Lowe claimed in his presentation at this year’s DDD eXchange conference. Capture the domain model. Embed the model in the code. Protect the domain model from corruption from other domains.

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