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Creating Seams in a Mainframe's Batch Pipelines

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A Case Study of Legacy Displacement In a recent project, we were tasked with designing how...
A Case Study of Legacy Displacement In a recent project, we were tasked with designing how we would replace a Mainframe system with a cloud native application, building a roadmap and a business case to secure funding for the multi-year modernisation effort required. We were wary of the risks and potential pitfalls o...
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Event Interception

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One of our teams was working for a client whose legacy system had stability issues and...
One of our teams was working for a client whose legacy system had stability issues and had become difficult to maintain and slow to update. The organisation was looking to remedy this, and it had been decided that the most appropriate way forward for them was to displace the legacy system with capabilities realised ...
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Inversion of Control Containers and the Dependency Injection Pattern (2004)

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Improving my Emacs experience with completion

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Martin Fowler: 25 Jan 2024I’ve been using Emacs for many years, using it for any writing...
Martin Fowler: 25 Jan 2024I’ve been using Emacs for many years, using it for any writing for my website, writing my books, and most of my programming. (Exceptions have been IntellJ IDEA for Java and RStudio for R.) As such I’ve been happy to see a lot of activity in the last few years to improve Emacs’s capabilities...
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Ship / Show / Ask (2021)

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A modern branching strategy Pull Requests have been widely adopted by many software teams. Some people...
A modern branching strategy Pull Requests have been widely adopted by many software teams. Some people love them, and some people long for the days of Continuous Integration – where you never created branches and your team put their changes together all the time. In some ways, Pull Requests are a game changer. Code ...
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Continuous Integration (2024 Update)

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Legacy Seam

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4 January 2024 When working with a legacy system it is valuable to identify and create...
4 January 2024 When working with a legacy system it is valuable to identify and create seams: places where we can alter the behavior of the system without editing source code. Once we've found a seam, we can use it to break dependencies to simplify testing, insert probes to gain observability, and redirect program f...
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DiffDebugging

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4 December 2023 Regression bugs are newly appeared bugs in features of the software that have...
4 December 2023 Regression bugs are newly appeared bugs in features of the software that have been around for a while. When hunting them, it usually valuable to figure out which change in the software caused them to appear. Looking at that change can give invaluable clues about where the bug is and how to squash it....
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