Jakub Holy

Jakub is an experienced Java[EE] developer working for a lean & agile consultancy in Norway. He is interested in code quality, developer productivity, testing, and in how to make projects succeed.

Core Java
Jakub HolyNovember 28th, 2018
0 296
Java: Simulating various connection problems with Toxiproxy
Simulate various connection problems with Toxiproxy and Java’s HttpURLConnection to see what kind of errors get produced: connect timed out vs. read timed out…
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Clojure
Jakub HolyNovember 6th, 2018
0 225
Clojure – comparison of gnuplot, Incanter, oz/vega-lite for plotting usage data
What is the best way to plot memory and CPU usage data (mainly) in Clojure? I will compare gnuplot, Incanter…
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DevOps
Jakub HolyOctober 7th, 2015
0 109
An answer to CircleCI’s Why we’re no longer using Core.typed
CircleCI has recently published a very useful post “Why we’re no longer using Core.typed” that raises some important concerns w.r.t. Typed…
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Software Development
Jakub HolySeptember 2nd, 2015
0 28
Shipping a Refactoring & Feature One Tiny Slice at a Time, to Reduce Risk
You don’t need to finish a feature and your users don’t need to see it to be able to release…
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Software Development
Jakub HolyMarch 23rd, 2015
0 34
There will be failures – On systems that live through difficulties instead of turning them into a catastrophy
Our systems always depend on other systems and services and thus may and will be subject to failures – network…
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Software Development
Jakub HolyJanuary 29th, 2015
4 128
Challenging Myself With Coplien’s Why Most Unit Testing is Waste
James O. Coplien has written in 2014 the thought-provoking essay Why Most Unit Testing is Waste and further elaborates the topic…
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Software Development
Jakub HolyNovember 12th, 2014
0 31
Tiny, Tiny Steps – Experience Report Developing A Feature In Minimal Value-Adding Increments
A post for those who want to see what an iterative, MVP-driven development of a feature looks like. Once upon…
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Clojure
Jakub HolyMay 2nd, 2014
0 34
Clojure: How To Prevent “Expected Map, Got Vector” And Similar Errors
What my Clojure code is doing most of the time is transforming data. Yet I cannot see the shape of…
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DevOps
Jakub HolyMarch 19th, 2014
0 37
Frustration-Driven Development – Towards DevOps, Lean, Clojure
My wife has mentioned that she likes my passion for doing things right in software development. That made me thinking,…
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Thank you!