ThisShouldNeverHappenException

But some exceptions are meant to happen

Tuesday, 29 May 2018

Python subprocess stdout and stderr

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In our machine learning pipeline we have number of python subprocesses being started from main python process. Originally subprocess were st...
Monday, 16 October 2017

Scala type alias in Apache Spark

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There is one feature in Scala that I see quite rarely - type aliases. While it can be easily misused and bring only confusion into Scala pr...
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Thursday, 16 March 2017

Apache Spark sample and coalesce

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It is wasteful to work with large number of small partitions of data, especially when S3 is used as data storage. IO then becomes unaccepta...
Monday, 20 June 2016

Maven, SBT, Gradle local repository sharing

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I've run into environment where different project were using different build tools - Maven, Gradle and SBT. Problem was how to reuse bu...
Tuesday, 22 March 2016

Fun with Spring Boot auto-configuration

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I favour configuration as straighforward as possible. Unfortunately Spring Boot is pretty much opposite as it employs lots of auto-configu...
Friday, 18 March 2016

Join unrelated entities in JPA

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With SQL, you can join pretty much any two tables on almost any columns that have compatible type. This is not the possible in JPA as it re...
Monday, 16 November 2015

Upgrading Querydsl 3 to 4

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Querydsl is for some time now my weapon of choice when it comes to writing typesafe JPA queries . Main advantage is great readibility of c...
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Martin Vanek
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