InfoQ Homepage Methodologies Content on InfoQ
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The Swift Method: A Framework for Software Modernization Using DDD
The Swift Method is a set of techniques for analyzing complex legacy systems, and determining the work required to gradually modernize key components or the whole system.
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Sense and Nonsense in Event Thinking and Microservices
Modularity in the systems we are building is very important, but there are anti-modularity forces that we must deal with to be able to achieve this modularity. In a presentation at the recent Event-driven Microservices Conference, held by AxonIQ, Allard Buijze shared his thoughts and experience building systems based on DDD, CQRS, microservices and event sourcing.
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Design and Implementation of a DDD-Based Modular Monolith
Kamil Grzybek recently published a project where he has designed, implemented, and in detail described a monolithic application with a Domain-Driven Design (DDD) approach. His goal is to show how a monolithic application can be designed and implemented in a modular way. He also discusses some architectural considerations and design patterns he has found useful in the application.
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Eric Evans Wants to Improve the Language of DDD
Eric Evans wants architects to actively engage in improving the language used when modeling and designing complex systems. Some of the fundamental terms used in DDD, such as Bounded Contexts, are often misunderstood. Evans wants to see an active community try to address these concerns, with the goal that DDD "should be a real, living body of thought."
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Migrating a Retail Monolith to Microservices: Sebastian Gauder at MicroXchg Berlin
In his presentation at MicroXchg in Berlin, Sebastian Gauder described how he and his teams migrated an existing food retail monolith at REWE, a large German company, into several business domains with 270 microservices, while increasing the number of teams from two up to 48. He also discussed the different design goals and rules they setup to make this possible.
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Are Frameworks Good or Bad, or Both?
Preferring frameworks or libraries is somewhat controversial, Frans van Buul, Evangelist at AxonIQ, the company behind Axon Framework, writes in a recent blog post. Many argue in the favour of libraries but Van Buul thinks that a framework can be very valuable when building business applications. He believes this to be especially true for applications based on CQRS, DDD and event sourcing.
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O’Reilly Publishes “The State of Microservices Maturity” Report
Microservices are evolving from fad to trend, according to “The State of Microservices Maturity” survey, published by O’Reilly. The report showed an overall positive attitude towards microservices among practitioners surveyed. One significant finding is that DevOps and microservices feed off each other, so that the success of one contributes heavily to the success of the other.
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Readable Code - Why, How and When You Should Write It
Most people would say they want readable code, and may even prefer readability over functionality. But when it comes down to asking people to define readability, opinions will start to diverge. At Explore DDD 2018 , Laura Savino covered why we want readable code, what it really means to be readable, and when readability absolutely must take priority over other considerations.
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Basic Concepts and the Future of Axon, a CQRS and Event Sourcing Framework
At the recent Event-Driven Microservices Conference in Amsterdam, Allard Buijze described in a presentation the basic concepts, the history and future of Axon, a framework for systems based on DDD, event sourcing and CQRS. The adoption of Axon Framework is growing rapidly and recently hit one million downloads.
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Michael Feathers Wants Error Elimination to Be a Design Driver
Michael Feathers finds errors fascinating, but acknowledges that most developers don't spend a lot of time focusing on them. He also thinks most error handling is kind of giving up. Although best known for his books about working with legacy code, Feathers used his keynote presentation at Explore DDD 2018 to discuss how eliminating errors can be a design driver for software systems.
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Eric Evans Says Domain-Driven Design (DDD) Isn't Done
During his keynote at Explore DDD, Eric Evans said "DDD isn't done." Over the past fifteen years since Domain-Driven Design was published, DDD hasn't stood still, and there is still much to do to keep DDD evolving.
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13th Annual State of Agile Survey is Open
The 13th annual State of Agile survey has been announced by CollabNet VersionOne. This yearly survey explores the worldwide adoption of agile.
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How No and Low Code Approaches Support Business Users and Professional Developers
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.
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Business Processes, Long-Running Services and Microservices
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.
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Strategies for Decomposing a System into Microservices
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.