Java Hellenic User Group Resources

Here you will find material from the JHUG events.

2022

December

• Evolving 20+ years codebase by George Gkogkolis slides
• Transactional Outbox with a twist by Chris Aslanoglou slides

2021

October recap in Greek

• Prepare for what Looms ahead by Heinz Kabutz video

April blog post

• JVM performance tuning by Thomas Pliakas slides
• An unconventional path to innovation by Babis Makrynikolas video

March blog post

• Test && commit || revert by Nikos Voulgaris slides
• Let’s talk about Bean Mapping by Periklis Ntanasis slides

2020

December blog post

• Micronaut in 15 minutes by Paris Apostolopoulos slides
• IO Thread vs Worker thread demystified by Georgios Andrianakis slides
• Emacs for Java developers by Ioannis Canellos slides
• Advent of Code in Java by Spyros Anastasopoulos slides

June recap in Greek

• Tale of a Kernel bug by Alexandros Sapranidis slides
• Java programming for fun by Spyros Anastasopoulos slides
• Google Cloud Run.pdf by Paris Apostolopoulos slides
• Contributing to open source software by Ioannis Canellos slides

May recap in Greek

• How a Java 8 backport wreaked havoc by Georgios Andrianakis slides
• Eurobank during COVID-19_v1.1 by Ioannis Kormaris and Anestis Georgiadis slides
• Effective Code Reviews by Alexandros Ntousias slides
• Compatibility testing Hazelcast.pdf by Vassilis Bekiaris slides

2019

November blog post

• Faster, Cheaper, Leaner: Horizontally Scaling a CI Pipeline by Giorgos Saslis slides
• Java Memory Management, Bedtime Stories by Evi Hatzidaki

September blog post

• Quarkus workshop by Georgios Andrianakis video

April blog post

• Introduction to Quarkus by Georgios Andrianakis slides video
• Software testing anti-patterns by Kostis Kapelonis slides video

February

• How to improve the quality of your application by Ioannis Kolaxis slides video
• Hands-on TDD by Nikos Voulgaris video

2018

December blog post

• JUnit 5 by Thomas Pliakas video
• High performance asynchronous transaction orchestration with Java Reactive frameworks by Nikos Papadopoulos and Vasilis Petropoulos slides video

October blog post

• Notes on Java security by Dimitris Glynos slides video
• Java is still free by Spyros Anastasopoulos slides
• Getting (a bit) familiar with Data Science by Ioannis Foukarakis slides video

September blog post

• Microservices architecture in action by Ioannis Kormaris slides video
• An overview of IntelliJ IDEA by Zisis Pontikas slides video

February blog post

• A short introduction to the Kotlin language by Antonis Lilis slides
• Istio by Georgios Andrianakis slides

2017

November blog post

• Using JCache to speed up your apps by Vassilis Bekiaris slides
• Docker, Kubernetes & Java Microservices by Apostolos Polymenakos and Giorgos Sikalias slides video

October blog post

• Microservices with Spring Boot by Sam Shemirani slides video
• An introduction to Java 9 by Ioannis Kolaxis slides video

May blog post

• An introduction to Cassandra database part 2 by Petros Kaklamanis slides video
• ReactiveProgramming by Spyros Anastasopoulos slides video

March blog post

• Refactoring in practice by Panagiotis Kapralos slides video
• Microbenchmarking with JMH by Georgios Kalfopoulos slides video

2016

December

• Writing maintenable software part 2 by Marios Kogias slides video
• An introduction to Cassandra database by Petros Kaklamanis slides video

October blog post

• Microservices in a data science world by Nikos Dimos slides video
• Writing maintenable software by Marios Kogias slides video
• GC performance tuning by Thomas Pliakas slides
• Data Science Vignettes in Java by Rui Miguel Forte slides

April blog post

• Spock vs JUnit by Kostis Kapelonis slides video
• Gradle for java developers by Kostis Saidis slides video