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Sunday, January 13, 2019 • maven java jenkins

I first observed this behavior on our build server running Jenkins. We have two build jobs, building snapshot versions. Project A and B. Project B depends on A. Always dealing with snapshots. Jenkins ran the standard mvn clean install command. Now, when both jobs were running in parallel on Jenkins, sometimes project B failed during compilation or running unit tests with weird ClassNotFound exceptions. The missing classes were from project A, of course.

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Wednesday, December 26, 2018 • alphatronic retro

This more than 30 years old Triumph-Adler Alphatronic P2 is still working. It can also play music. Here is a video how it plays the song Silent Night. This song is this year 200 years old.

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Saturday, May 26, 2018 • wine delphi linux

Maybe you have an Windows program, but you don’t want to start your Windows virtual machine (or boot into Windows) everytime to use it. There is wine which provides a compatibility layer for Windows programs so that they can run on Linux and other operating systems.

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Sunday, February 18, 2018 • calendar algorithm

When you create a calendar, like OOoCalendar, it’s nice, if the calendar already calculates holidays. One of the holidays, that is every year on a somewhat different date is Easter. There are many other Christian holidays that depend on the Easter day like 40 days after Easter is Ascension Day.

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Sunday, December 3, 2017 • java timezone olson

Do you know the “Olson database”? It’s the database in which all the timezones of the world are described. The timezones of the present - and also of the past. See the wikipedia article tz database for more information.

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