DubJug (original) (raw)

DubJug

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What is DubJUG?

The Dublin Java User Group (DubJUG) is a community of software developers working with JVM languages. Proudly supported by our many partners, our events are designed to bridge the Java knowledge gap, helping our community of developers upskill with practical workplace skills, and at the same time local businesses to access stronger team members with the know-how to get engineering problems solved.

Our monthly events offer insight and best practice into real-world technology use delivered by world renowned Java experts - the ones you'd typically only see at major international conferences. DubJUG also fosters local networking among Java professionals.

EVENTS

Since 2007, we have literally held hundreds of events, from evening meetups to weekend coding parties. Bringing developers together is truly magic. Not only are the events a source of knowledge, they are also a vibrant atmosphere to meet new friends, colleagues and prospective partners.

"I’ve actually attended several DubJUG events and really enjoyed them. As I’m transitioning my career from manufacturing engineering to Java development (at junior level), the talks have been incredibly helpful. They've not only deepened my knowledge but also helped me prepare for interviews."
Renan Correa

DubJUG 267 - Live at Squarespace Dublin HQ

17 Jun 2026

Our June meetup sees us live, in-person at Squarespace's Dublin HQ!

Come join Java senior software expert, Diana Nanuti (former Devoxx UK speaker), along with Squarespace engineers Shradha Shankar and Darragh Clarke who will shed light on the technology being adopted in their day-to-day working lives.

Past

DubJUG 266 - Kadi McKean & Frithjof Hoffmann

26 May 2026

Meet ReversingLabs Kadi McKean and Frithjof Hoffmann for DubJUG 266 on Tuesday 26th May for an intriguing night of software security stories - simple stuff that has gone so wrong, you'll wonder how these companies, well... got it so wrong!

Past

265 - Trash & Rest

06 May 2026

DubJUG 265, our live in-person event presents Professor Ž (aka Željko Kozina!) Hear why Netflix dumped REST in favour of GraphQL and explore how memory management improves performance, the different parts of Java memory and the various garbage collectors.

Book your seat below ⤵️⤵️⤵️

Past

264 - Java AI Tools at Gong HQ

16 Apr 2026

Our live in-person event, DubJUG 264, was hosted by our partner Gong’s HQ on the evening of April 16th.

Check out the full talk details by Gong software engineer Vanja Tesin and engineering manager Anthony Brady - and get the recordings below ⤵️⤵️⤵️

Past

262 - How we optimized Santa's travels in Java with Timefold

27 Jan 2026

We're back to get 2026 ignited not with a flame, but an explosion. January sees not one, not two, but three Java Champions visiting Dublin as we again join forces with the JChampions conference to bring you the best!

The third and final visitor coming to present his JChampions talk, Optimizing Santa's travels in Java with Timefold, live in-person on the evening of January 27th is BeJUG host Tom Cools.

Tom also presents a special bonus talk for our attendees "Braving the Change: Recalibrating to new realities," which he recently presented at Devoxx in Belgium.

Past

261 - Effective Pattern Matching in Java plus Bonus Talk

22 Jan 2026

First up is author extraordinaire Cay Horstmann, live in-person on the evening of January 22nd as he presents his JChampions talk plus a special bonus talk for our attendees.

Past

DubJUG 2510 - Bruno Souza

19 Nov 2025

We're privileged and fortunate to welcome Bruno Souza back to the Dublin Java User Group the evening of November 19th. Bruno is known worldwide helping Java developers accelerate their careers beyond coding. It's a night not to be missed if you're in a rut, want inspirational strategies to get ahead, or even to become a Java rockstar yourself!

Past

DubJUG 257 - Haoyi Li

22 May 2025

Author and world renowned open source contributor Haoyi Li visited the Dublin Java User group on 22nd May on a rare visit to Dublin.

At this event Haoyi discussed how the experimental build tool "Mill" bridges the gaps of Maven and Gradle, followed by a deep dive into some techniques the Mill build tool uses to optimize developer experience. Full details below, along with a recording of the event.

Check out our [next event here >>>](https://ti.to/dublin-java-user-group/)

Past

DubJUG 256 - Nicolas Fränkel

10 Apr 2025

On a rare visit to Dublin by Nicolas Fränkel, we learned about OpenTelemetry Tracing, along with a walkthrough of End-to-End Pull Request Testing on Kubernetes.

As always, drinks and pizza were provided courtesy of our premier partners, Integral Ad Science, Stackand.Co Recruiters and FINEOS.

FULL TALK DETAILS BELOW ⤵️

Past

DubJUG 255 - The Duke Turns 30

13 Mar 2025

We joined Azul Systems FOOJAY and DubJUG on the evening of Thursday 13th March for DubJUG's Watch Party of Duke Turns 30, a celebrating 30 years of Java

Past

DubJUG 254 - In-Person with Simon Brown

27 Feb 2025

We joined on the evening of Thursday 27th February as author of Software Architecture for Developers, and creator of the C4 Software Architecture Model, Simon Brown delivered two great talks live, in-person.

ABSTRACTS BELOW ⤵️

Past

DubJUG 253 - JChampions Series - In-Person with Elias Nogueira

27 Jan 2025

We joined on the evening of Monday 27th January as Dutch based Brazilian Java Champion, Elias Nogueira delivered two great Java testing talks, one of which was streamed worldwide as part of the JChampions Conference 2025.

ABSTRACTS BELOW ⤵️

Past

DubJUG October - Steve Poole Came Back!

24 Oct 2024

On the run up to Halloween 2024, Java Champion Steve Poole made a long-awaited return to the Dublin Java User Group to scare the bejesus out of you, the java developer.

ABSTRACTS BELOW ⤵️

Past

DubJUG with Red Hat's Sergey Beryozkin

27 Aug 2024

This month, we welcomed long-time open source committer Sergey Beryozkin to the Dublin Java User Group. Currently working at Red Hat, Sergey has a deep interest in OpenId Connect and JSON Web Token (JWT) security.

ABSTRACTS BELOW ⤵️

Past

DubJUG with Oracle's Juarez Barbosa Junior

25 Jun 2024

It had been several years since we last had the great pleasure of welcoming Juarez Barbosa Junior to the Dublin Java User Group. On that occasion, we welcomed him back for a session on blazingly fast GenAI app development using Spring AI.

ABSTRACTS BELOW ⤵️

Past

Apache Kafka Night

07 Mar 2024

We welcomed local Brasilian developer Igor De Souza for a night of Kafka fun!

ABSTRACTS BELOW ⤵️

Past

DubJUG - Java Champion Kevin Dubois

14 Nov 2023

On the evening of Tuesday November 14th we welcomed Red Hat developer Kevin Dubois to join the Dublin Java User Group at TechMeetup.space in the city centre.

ABSTRACTS BELOW ⤵️

Past

DubJUG - Java Champion Gerrit Grunwald

31 Oct 2023

Java Champion and Azul developer, Gerrit Grunwald (aka Hansolo) joined us on the evening of Tuesday October 31st at TechMeetup.space in Dublin city centre.

Past

DubJUG - Java Champion Venkat Subramaniam

23 Oct 2023

On a rare appearance in Ireland Java Champion extraordinaire Venkat Subramanian treated us to a 90 minute deep-dive on Refactoring from Imperative to Functional Style.

ABSTRACT BELOW ⤵️

Past

DubJUG - Oracle's Kris Foster

21 Sep 2023

We hope you joined us the evening of Thursday September 21st, as the Dublin Java User Group welcomed Kris Foster LIVE in-person at TechMeetup.space to give you solid advice on how to get the most out of your Java applications.

ABSTRACTS BELOW ⤵️

Past

DubJUG - Java Champion Bruno Souza

17 Jul 2023

We hope you joined us July 17th, as the Dublin Java User Group welcomed Java Champion Bruno Souza LIVE in-person at TechMeetup.space to share secrets of life beyond a senior Java developer.

ABSTRACTS BELOW ⤵️

Past

March 2023 - Blockchain & AI Talks

22 Mar 2023

This month the Dublin Java User Group welcomed two local Dublin speakers, Shritesh Jamulkar (Blockchain Corda) and Ahmad Albarqawi (Intelligent Java AI) LIVE in-person at TechMeetup.space.

Past

February 2023 Java Champion Maarten Mulders

28 Feb 2023

We hope you joined us February 28th, as the Dublin Java User Group welcomed Java Champion Maarten Mulders LIVE in-person at TechMeetup.space to present two talks, 'What's Cooking in Maven', and 'React in 50 minutes'.

Past

November 2022 - Maurice Naftalin

23 Nov 2022

We hope you joined us in-person on the evening of Wednesday 23rd November at TechMeetup.Space, Dublin city centre, was multi-award winning Java Rockstar and Java Champion, Maurice Naftalin. The event was in-person and livestream.

During the day Maurice was running a heavily subsidised Lambda training session - every software developer should be proficient in this area - spaces limited - [details](https://ti.to/dublin-java-user-group/nov-2022-lambdas-streams-collectors-course)

Past

Learn Lambdas, Streams & Collectors with Maurice

23 Nov 2022

Interested in learning about lambdas streams and collectors in depth?

These powerful Java features allow you to implement complex operations clearly and concisely. This one-day course introduces the ideas of lambdas and streams, and then takes you from the basics to advanced use cases.

Past

October 2022 - Java Champion Holly Cummins

02 Nov 2022

Java Champion Holly Cummins was joining us in-person on the evening of Wednesday 2nd November at TechMeetup.Space. She presented 'Cloud Chaos and Microservices Mayhem,' and her brand new, never presented before talk, 'Writing Greener Java Applications.'

Past

September 2022 - Java Champion Matt Raible

28 Sep 2022

Matt Raible, Java Champion, and Okta Developer advocate was back at the Dublin Java User Group on Wednesday 28th September - we had one almighty in-person deep dive - Micro Frontends for Java Developers. Livestream recorded

Past

September 2022 - Java Champion Ixchel Ruiz

14 Sep 2022

In September 2022 Java Champion Ixchel Ruiz joined us from Switzerland to present two outstanding talks, 'DevOps for Java Developers', and 'Framework Agnostic REST API Testing', both choices of our platinum members.

Read below for full details...

# **REGISTRATION NOTES**

The Dublin Java User Group events are designed to enrich the knowledge and careers of developers and technology professionals. By booking your seat, you agree to the [booking conditions](http://dubjug.org/booking.php)

**PUBLIC HEALTH:** We aim to provide a safe space to meet in-person - please do not attend this event if you are currently or in the last ten days prior to the event, experienced symptoms of cold, flu, Covid-19, winter vomiting. Thank you.

**MORE DUBLIN JAVA USER GROUP EVENTS**
**Meet JavaOne Rockstars and Java Champions! Check out our other Dublin Java User Group events** - [**DubJUG.org**](https://dubjug.org)

Past

August 2022 - IBM's Grace Jansen

24 Aug 2022

IBM's Developer Advocate and Java Champion, Grace Jansen visited the Dublin Java User Group to give 'hands-on' help with open-source technologies and tools (including MicroProfile, Jakarta EE, Open Liberty, OpenJ9, and more!) for the 15 factors needed to build cloud native applications.

Past

June 2022 - Java Champion Simon Ritter

29 Jun 2022

The midsummer of June 2022 saw Java Champion Simon Ritter join us in Dublin, presenting two fabulous sessions; The Art of Java Language Pattern Matching, and Java on CRaC: Superfast JVM Application Start-up.

Past

April 2022 - JavaOne Rockstar, Steve Poole

28 Apr 2022

On Thursday 28th April 2022, the Dublin Java User Group hosted Security Champion and JavaOne Rockstar Steve Poole at TechMeetup.Space in tcube, No.1 O'Connell Street, Dublin.

It was an insightful night dedicated to Cybercrime and its bigger more dangerous cousin: Cyber-warfare. We explored the drivers behind the radical shift, the software arsenal available and how and why you, the software developers, are both target and unwitting helpers.

##SESSION ABSTRACTS BELOW....

Past

March 2022 - Java Champion Ivar Grimstad

31 Mar 2022

The Dublin Java User Group hosted Java Champion and Jakarta EE Developer Advocate at Eclipse Foundation, Ivar Grimstad, on Thursday 31st March at TechMeetup.Space in tcube, No.1 O'Connell Street, Dublin.

**REGISTRATION NOTES**

**PUBLIC HEALTH:** We aim to provide a safe space to meet - please do not attend this event if you are currently or in the last ten days prior to the event, experienced symptoms of cold, flu, Covid-19, winter vomiting. Thank you.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](https://dubjug.org)

Past

January 2022 - jChampions Conference Watch Party

20 Jan 2022

The Dublin Java User Group hosted a WATCH PARTY of the jChampions Conference 2022 on the afternoons and evenings of Thursday 20th, Friday 21st, Monday 24th, and Tuesday 25th January at TechMeetup.Space in tcube, No.1 O'Connell Street..

**Monday's session will also see local Java Champion Rafael del Nero present his session live from DubJUG.**

**REGISTRATION NOTES**

**COVID-19:** Attendees must be "fully vaccinated", bringing your cert and ID with you. People will be seated 2m apart which means spaces are limited. Pre-booking, therefore, is essential. No booking or Covid cert - no entry!

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](https://dubjug.org)

Past

December 2021 - Barry Evans

21 Dec 2021

Local Java developer and DubJUG Co-Lead, Barry Evans, presented DubJUG’s first in-person event (since March 2020) on the evening of December 21st.

**REGISTRATION NOTES**

You must be fully vaccinated, bringing your cert and ID with you. Spaces are limited.

**PLATINUM MEMBERSHIP**

Due to the overwhelming demand to attend, our events are always full. Priority booking is offered to our Platinum Members. Email Team@DubJUG.org if you'd like to know more about becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](https://dubjug.org)

Past

September 2021 - Microsoft's Bruno Borges

30 Sep 2021

Java Champion Bruno Borges visited the Oracle Dublin Java User Group in September. Bruno explained why Microsoft acknowledges and supports the adoption of custom Java runtimes crafted for specific application needs rather than the use of general-purpose Java runtimes.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](https://dubjug.org)

Past

Java25 - Celebrating Java's 25th Anniversary

27 Aug 2020

Java celebrated its 25th anniversary that year, and the Dublin Java User Group marked the occasion with a day-long mini-conf, #Java25, on Thursday 27th August in Dublin city centre for 100 developers.

**REGISTRATION NOTES**

Past

April 2020 - John Ferguson Smart

21 Apr 2020

Test expert John Ferguson Smart visited DubJUG in April — details were shared ahead of the event.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

March 2020 - DeepCodesAI's Frank Fischer

10 Mar 2020

Frank Fischer, head of Developer Relations at DeepCode, the Zurich-based company that uses AI to identify bugs before they happen, came to present at the Dublin Java User Group in the city centre on the evening of Tuesday, March 10th.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

Dec 2019 - Java Champion Otavio Santana

04 Dec 2019

Brazilian Java Champion and Duke Award Winner, Otavio Santana visited the Oracle Dublin Java User Group in December. Subscribers were notified when the talks were announced.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

Nov 2019 - Testing Java Microservices with Andy Gumbrecht

06 Nov 2019

Co-author of the highly acclaimed *Testing Java Microservices*, Andy Gumbrecht visited the Oracle Dublin Java User Group in November. Focusing on testing, attendees learned some neat embedded Kafka and Mongo, Arquillian, and GitLab pipeline tests.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

Oct 2019 - Quarkus & Revisiting Effective Java in 2019

04 Nov 2019

We have another Java Champion visiting us in October. Edson Yanaga is Director of Developer Experience for Red Hat. In this double bill, Yanaga, as he is affectionately known the world over, will embark upon a live coding session before your very eyes with the supersonic subatomic Java, Quarkus, a Kubernetes Native Java stack tailored for GraalVM & OpenJDK HotSpot, crafted from the best of breed Java libraries and standards. Right!

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

Oct 2019 - Micronaut Framework with Ryszard Perkowski

08 Oct 2019

“For our first event of October, Polish Java developer Ryszard Perkowski, aka Rick, visited the Oracle Dublin Java User Group for the first time. He presented new kid on the block, Micronaut — a competitor to Spring.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

Sept 2019 - Hazelcast Riaz Mohammed

18 Sep 2019

\*\*“Hazelcast’s Riaz Mohammed made his return to the Oracle Dublin Java User Group to walk attendees through how to set up an end-to-end enterprise-grade platform to operationalize Artificial Intelligence using the open-source Hazelcast technology.

The Oracle DubJUG event took place at 19:00 on Wednesday 18th September.

# **Whoaaaa! STOP THE PRESS....**

At this event, we will be giving away a free [**Voxxed Days Microservices**](https://voxxeddays.com/microservices/) conference and workshop taking place in Paris October 21-23. The ticket is worth 840 euro!

You need to be at the Oracle DubJUG event to be in with a chance to get your hands on this fabulous prize - our developer-only event takes place at 19:00 on Wednesday 18th September in Dublin city centre.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

Sept 2019 - Java Champion Matt Raible

10 Sep 2019

Java Champion and author of *The JHipster Mini-Book* and *Spring Live*, Matt Raible, returned to share his expert knowledge — delivering an amazing array of information that enabled new beginnings in many Java careers.

The Oracle DubJUG event took place at 19:00 on Tuesday 10th September.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

July 2019 - Microprofile and Istio with Java Champion Emily Jiang

31 Jul 2019

We warmly welcomed Java Champion Emily Jiang to the Oracle Dublin Java User Group on Wednesday 31st July. Emily, who works in IBM’s Hursley Lab, is a regular speaker at global events such as Code One, DevNexus, JAX London, Voxxed, Devoxx US, Devoxx Belgium, Devoxx UK, Devoxx France, and EclipseCon.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

July 2019 - Oleg Selajev - GraalVM for Java Developers

16 Jul 2019

Lead developer advocate at Oracle Labs and Java Champion, Oleg Selajev, took a hop from his native Estonia for a tour of Ireland in July. Oleg explained GraalVM.

This Oracle DubJUG event took place at 19:00 on Tuesday 16th July in Dublin city centre.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

June 2019 - Lightweight Microservices with Microprofile and Raspberry PIs

19 Jun 2019

Our June event saw Tomitribe’s Director of Engineering, Jean-Louis Monteiro, join us at the Oracle Dublin Java User Group to share his knowledge of Eclipse MicroProfile. Members left with a solid understanding of lightweight microservices and stateless microservice security via JWT, TomEE, and MicroProfile.

FINEOS developer Boris Lulic won this month’s Platinum Member prize — a year’s subscription to IntelliJ.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

May 2019 - Infinite Streams, Hot Fluxes, Live Queries and Tailable Cursor Brian Matthews

02 May 2019

Brian Matthews of Búraló Technologies returned to the Oracle Dublin Java User Group on Thursday 2nd May. At the time, he was consulting at Synchronoss Technologies, working remotely from the comfort of his home in Rostov-on-Don, Russia.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

April 2019 - Write Now, Run Anytime with Neil C Smith & Gherkin with John Ferguson Smart

10 Apr 2019

A man known the world over for live-coding lambdas in venues to make breakbeat music, PraxisLive’s Neil C Smith, came to the Oracle Dublin Java User Group on Wednesday 10th April. Joining him at our sixth event of 2019 was John Ferguson Smart, O’Reilly and Manning author of *BDD in Action*, *Java Power Tools*, and *Jenkins: The Definitive Guide*.

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

March 2019 - Java with Stephen Chin

21 Mar 2019

Our fifth event of 2019 saw Director of the Oracle Groundbreakers Team, global keynote speaker, and Java Rockstar Stephen Chin come to the Oracle Dublin Java User Group on Thursday 21st March. Known the world over for his stage antics and hair-raising motorcycle expeditions, it was a once-in-a-lifetime opportunity (well, ‘once’ unless you could afford to go to the global conferences outside of Ireland!) to meet Stephen on our turf.

##**SCROLL DOWN FOR DETAILED TALK ABSTRACTS**

**REGISTRATION NOTES**

**PLATINUM MEMBERSHIP**

##**MORE DUBLIN JAVA USER GROUP EVENTS**
\*\*Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - \*\* [**DubJUG.org**](http://dubjug.org)

Past

March 2019 - Mark Reinhold & Brian Goetz

06 Mar 2019

Our fourth event of 2019 saw Oracle’s keynote speakers Mark Reinhold and Brian Goetz make a journey to the Oracle Dublin Java User Group on Wednesday 6th March. The full talk abstracts were shared below...

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Are you interested in enriching your career and business with knowledge given by the world's most recognised Java Rockstars and Java Champions? If so, check out our Oracle Dublin Java User Group events here - [DubJUG.org](http://dubjug.org)\*\*

Past

February 2019 - Serverless Java Challenges & Project Helidon with David Delabassee

06 Feb 2019

Our third event of 2019 saw Oracle’s Serverless Developer Relations teamster David Delabassee return to the Dublin Java User Group on Wednesday 6th February. The full talk abstracts were shared below...

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
\*\*Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - \*\* [**DubJUG.org**](http://dubjug.org)

Past

January 2019 - Java Features & Modularity with Sander Mak

24 Jan 2019

Our second event of 2019 saw consultant Sander Mak visit us from Holland to talk to us about Java on 24th January. The full talk abstracts were shared below. The Dublin 2 venue was revealed on booking.
.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
\*\*Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - \*\* [**DubJUG.org**](http://dubjug.org)

Past

January 2019 - The Oracle Blockchain Cloud Service / Juarez Barbosa Jr

22 Jan 2019

Our first evening event of 2019 sees Oracle Developer Advocate Juarez Barbosa Junior talk to us on the Oracle Blockchain, 22nd January.
Check out the full talk abstracts below. The Dublin 2 venue is revealed on booking.
.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - ** [**DubJUG.org**](http://dubjug.org)

Past

Java 11 HTTP Client / Java 9 Platform Module System (JPMS)

20 Dec 2018

\*\*“On 20th December 2018, we went totally Java. The talks were presented by Oracle’s Chris Hegarty and Workday engineer and DubJUG member Anton Balaniuc.

The full talk abstracts were shared below. The Dublin 2 venue was revealed on booking.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
\*\*Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - \*\* [**DubJUG.org**](http://dubjug.org)

Past

Eclipse Collections Kata - Barry Evans

13 Dec 2018

On 13th December 2018, DubJUG co-lead Barry Evans presented the Eclipse Collections Kata workshop for members of the Oracle Dublin Java User Group.

The full talk abstracts were shared below. The Dublin 2 venue was revealed on booking.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
\*\*Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - \*\* [**DubJUG.org**](http://dubjug.org)

Past

Benjamin Nothdurft

15 Nov 2018

On 15th November 2018, we welcomed Benjamin Nothdurft to the Oracle Dublin Java User Group.

Benjamin was working for Codecentric at the time, and had formerly been with ePages, the German eCommerce provider that helped over 140,000 businesses get their online shops open.

The full talk abstracts were shared below. The Dublin 2 venue was revealed on booking.
.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
\*\*Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - \*\* [**DubJUG.org**](http://dubjug.org)

Past

Oracle IOT Workshop

30 Oct 2018

On 30th October 2018, we welcomed Tim Graves to the Oracle Dublin Java User Group. Tim worked on architecting cloud-native solutions, including the use of the Oracle IoT Cloud Service to bring data into the environment and enable the creation of digital replicas of physical devices.

The full talk abstracts were shared below. The Dublin 2 venue was revealed on booking.
.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
\*\*Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - \*\* [**DubJUG.org**](http://dubjug.org)

Past

elastic Guys Philipp Krenn and David Pilato

11 Oct 2018

For October’s Oracle Dublin Java User Group event, we were privileged to welcome Elastic guys Philipp Krenn and David Pilato, who showed how Elastic can enhance legacy apps and how to monitor Spring Boot applications.

This event took place at 19:00 on Thursday 11th October.

The full talk abstracts were shared below.

**REGISTRATION NOTES**

The Oracle Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE ORACLE DUBLIN JAVA USER GROUP EVENTS**
**Java developers who are interested in this meetup are also attending other Oracle Dublin Java User Group meetups - check them at** [**DubJUG.org**](http://dubjug.org)

Past

Pivotal+Microsoft JUG Tour Europe 2018

08 Oct 2018

We were privileged to host the Irish leg of the Pivotal+Microsoft JUG Tour Europe 2018.

This event took place on 8th October 2018 at Dogpatch Labs — doors opened at 18:15, with presentations starting at 19:00 sharp.

The full talk abstracts were shared below.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events** - [**DubJUG.org**](http://dubjug.org)

Past

Venkat

22 Sep 2018

On 22nd September 2018, we were incredibly privileged to welcome Dr. Venkat Subramaniam to Dublin and to the Dublin Java User Group again.

The full talk abstracts were shared below. The Dublin 2 venue was revealed on booking.
.

**REGISTRATION NOTES**

BOOKING FOR THIS EVENT CLOSES AT 10:00am SATURDAY.

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
\*\*Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - \*\* [**DubJUG.org**](http://dubjug.org)

Past

Scott Sosna's Visualising Open Data with NEO4J

13 Sep 2018

For September’s DubJUG event, we were privileged to welcome Scott Sosna, who works at Dell EMS Greater Minneapolis and also served on the Content Review Committee for JavaOne.

This event took place at 19:00 on Thursday 13th September.

The full talk abstracts were shared below..

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
**Java developers who are interested in this meetup are also attending other Dublin Java User Group meetups - check them at** [**DubJUG.org**](http://dubjug.org)

Past

Java Champion Matt Raible

12 Sep 2018

It had been over ten years since we first met Java Champion and author of *The JHipster Mini-Book* and *Spring Live*, Matt Raible, and we were delighted and privileged to welcome him again to share his expert knowledge in his session ‘Bootiful Development with Spring Boot and React’.

This event took place at 19:00 on Thursday 12th September.

The full talk abstracts were shared below.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
\*\*Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - \*\* [**DubJUG.org**](http://dubjug.org)

Past

Java Rockstar & Java Champion Sebastian Daschner

09 Aug 2018

For our first DubJUG August event, we were privileged to welcome from Germany Java Champion, Java Rockstar, and Oracle Developer Champion Sebastian Daschner, who shared his expert knowledge in two talks: ‘Cloud Native, Service-Meshed Java Enterprise With Istio’ and ‘7 Principles of Productive Software Developers’.

This event took place at 19:00 on Thursday 9th August.

The full talk abstracts were shared below.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

##**MORE DUBLIN JAVA USER GROUP EVENTS**
\*\*Interested in meeting Java Rockstars? Check out our other Dublin Java User Group events - \*\* [**DubJUG.org**](http://dubjug.org)

Past

Java - Containers and Serverless

26 Jul 2018

For the last DubJUG event in July, we welcomed Matthew Gilliard, who works at Oracle UK. Matthew shared his expert knowledge around containers and serverless.

This event took place at 19:00 on Thursday 26th July.

The full talk abstracts were shared below.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals\*. Due to the overwhelming demand to attend our events they are always full.

We reserve the right to cancel bookings if you are not aligned to our intended audience. No refunds are given for ticket cancellations or no-shows. Check your diary carefully before booking!

Email Team@DubJUG.org if you're interested in becoming a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

Past

Docker Workshop with Barry Evans

19 Jul 2018

Due to demand and a 'sold-out' workshop in June, DubJUG co-lead Barry Evans is giving you the chance to attend his highly interactive hands-on workshop Docker for Java Developers on the evening of July 19th.

Check out the full workshop abstract below. Doors 18:15 / Prompt Start 19:00.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Due to the overwhelming demand to attend our events they are always full so make sure you're subscribed to the wait-list to get the release notification of this and future Dublin Java User Group events.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

Past

Building Reactive Microservices with Spring Boot 2.0

05 Jul 2018

For the DubJUG May event, we welcomed back Brian Matthews, long-term DubJUG member and now JUG leader in Rostov-on-Don, Russia, who presented on building reactive microservices using the soon-to-be-released 2.0 version of Spring Boot, along with cloud-native applications.

Doors opened at 18:15, and talks started at 19:00.

The full talk abstracts were shared below.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

Past

Live Coding with Spring Music: Top 5 Ways to Deploy Java to the Cloud

27 Jun 2018

For the DubJUG June event, we welcomed back Brian Benz, a Microsoft Advocate on Java technologies. This presentation built upon his highly acclaimed talk at DubJUG in November 2017, followed by a session on serverless.

The full talk abstracts were shared below.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

Past

Cache Abstraction with Hazelcast

13 Jun 2018

For our second DubJUG event in June, we welcomed Riaz Mohammed from Hazelcast, the leading in-memory data management company, who discussed Hazelcast’s integration with Spring. Alongside Riaz, DubJUG member Anton Balaniuc from Workday provided insight into Java 8 Streams.

This event was sponsored by Hazelcast. Attendees had a chance to win an Amazon Echo.

The full talk abstracts were shared below.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

Past

Docker Workshop with Barry Evans

07 Jun 2018

On the evening of 7th June, DubJUG co-lead Barry Evans ran a highly interactive hands-on workshop giving a brief introduction to using Docker for Java Developers.

The full workshop abstract was shared below. Doors opened at 18:15, with a prompt start at 19:00.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

Past

vJUG - Jenkins X with James Strachan / Java 8 Streams with Anton Balaniuc

05 Jun 2018

Our first DubJUG in June saw a ‘tune-in’ to vJUG’s online meetup with James Strachan, where he covered Jenkins X, followed by a presentation on Java 8 Streams by local developer and DubJUG Platinum Member Anton Balaniuc.

The full talk abstracts were shared below.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

**Doors for this event open at 16:30. If you can't make this early start time tune-in to the [vJUG stream here](http://virtualjug.com/)\*\*

Past

Building Reactive Microservices with Spring Boot 2.0

24 May 2018

The full talk abstracts were shared below.

**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted Platinum Member of the Ireland's longest running, most respected and most active Java User Group.

Past

Serverless Deep Dive with Bert Ertman

24 Apr 2018

Our April event welcomed fellow and Director of Technology Outreach at Luminis, Bert Ertman. A frequent speaker on Java, cloud, and software architecture all over the world, Bert is a book author and serial conference organizer. Bert Ertman was awarded the coveted title of Java Champion in 2008, and is a JavaOne RockStar speaker and Duke’s Choice award winner.

# **Serverless Deep Dive**

##Doors Open 18:15 (evening session)

##**Serverless Deep Dive**

No server can be more easily managed than no server. Therefore: meet Serverless, a paradigm that truly approaches the Pay-as-You-Go philosophy once promised by the Cloud.

In this deep dive Bert will explore the Serverless paradigm by diving into the Serverless manifesto first and by explaining the differences between Serverless, FaaS, and PaaS., and then looking at the different Cloud vendors and what they have to offer in the Serverless space.

After the theoretical first part, Bert will start developing some functions with AWS Lambda, since it is, he says, by far the easiest entry point into the world of Serverless. Then he will take a step back to discuss how existing architectures (ie modern web applications) will be impacted. Where does it actually make sense to use this kind of technology and where doesn't it.

Finally Bert will end with a number of drawbacks to consider and to make it a balanced story of both pros and cons.

Besides AWS Lambda, he'll look at alternatives like Apache OpenWhisk and recently announced Project Fn as well.

This talk thoroughly explores Serverless, its impact on existing architectures, and assesses it's usability for Mobile Back-ends as a Service (MBaaS), Functions-as-a-Service (FaaS) and for Microservices hosted in the cloud. Internet connectivity permitting, there will be lots of demos too..

You can follow Bert on twitter at [**@BertErtman**](https://twitter.com/BertErtman), [**@Lumiis\_EU**](https://twitter.com/Luminis\_eu)

# **The Dublin Java User Group - Sponsor Messages**

**Stackand.Co** enrich the professional lives of Java / Scala software professionals - with over 20 years experience in the Irish ICT market, they have helped many great people elevate their careers.

Perhaps they can do the same for you working with companies [**like this one?**](https://recruit.zoho.com/recruit/ViewJob.na?digest=7NZDPrAwelZRR7pgbV1JQlg7fAI9NqhUofQ6ctM2P.8-&embedsource=Embed)

Website: [**Stackand.Co**](http://stackand.co) / Twitter: [**StackanddotCo**](https://twitter.com/stackanddotco)

**GuruTeam** delivers high end ICT learning, mentoring and consultancy services, in Ireland, the UK and worldwide. Their expert instructors formulate bespoke training to suit their clients and can deliver programmes on or offsite.

New courses for 2018 include Blockchain with Ethereum / Corda (presented by Ben Evans), Machine Learning for Java and Python developers, IoT, GDPR, Hands-on Web Security for Java Developers as well as Modern Security with Ben Evans, Angular 5 and more

Website: [**GuruTeamIrl.com**](http://guruteamirl.com) / Twitter: [**GuruTeamIreland**](https://twitter.com/guruteamireland)

**Equifax Technology Ireland** is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: [**Equifax.com**](https://equifax.com) / Twitter: [**Equifax**](https://twitter.com/equifax)

**Version 1** is a trusted technology partner to major domestic and international customers across all industry sectors in the UK and Ireland. Their Java practice has grown to over 120 people over the last few years, and continues to grow. Many of their Java customers use a significant amount of open-source tools and technologies, and therefore Version 1 work with the community to hear other Java success stories, learn more about people’s experiences, and bring in Java experts and champions to get the latest on what’s going on in that space.”

Website: [**Version1.com**](https://version1.com) / Twitter: [**Version1Tweets**](https://twitter.com/Version1Tweets)

**Teckro** are rethinking every element of clinical research - the people, the processes, the technologies used. By making it possible for all relevant information to be instantly accessible to every active member of a clinical trial and for the entire study teams to be connected effortlessly, they are broadening the possibilities of what can be achieved. This means drugs and treatments for the world’s most complex diseases are being developed quicker, and Teckro's long-term goal of continuously improving healthcare for everyone is realised.

Teckro's partnership with DubJUG means that they can interact and exchange ideas with some of Dublin’s best developers.

Website: [**Teckro.com**](http://Teckro.com) / Twitter: [**TeckroOfficial**](https://twitter.com/teckroofficial?lang=en)

**Sonorplex** add the edge to event attendance with their innovative 'Mark and Review' video platform. Download the Sonorplex app on your smartphone, attend DubJUG, and click points of interest in realtime. Your own personal 'marked' copy will be available for reviewing within hours, allowing you to relive the presentations again and again!

Website: [**Sonorplex.com**](https://sonorplex.com) / Twitter: [**Sonorplex**](https://twitter.com/sonorplex)

**tcube** provides city-centre co-working / hotdesks and fully serviced office space for ICT professionals and companies specifically. Their community knits so well together remote workers, contractors, city visitors and entrepreneurs / startups immediately become a part of a network of like-minded people who are able and willing to help one another. Offices in Fleet Street, Trinity Street and Grafton Street provide great locations with a huge benefit when it comes to hiring and retaining millennials.

Website: [**tcubedublin.com**](https://tcubedublin.com) / Twitter: [**tcubeDublin**](https://twitter.com/tcubedublin)

.
##**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted platinum member of the Ireland's longest running and most respected Java User Group.

We reserve the right to cancel bookings if the attendee is not aligned to the intended audience. No refunds for cancellations, no-shows or misalignments.

Past

vJUG - A Craftsman’s Guide to Designing a Clean Architecture

19 Apr 2018

We welcomed a Virtual Java User Group screening at the Dublin Java User Group.

##Marcus Biel

# **A Craftsman’s Guide to Designing a Clean Architecture**

##Doors Open 16:30 for 17:00 start.
.

In 2018, it seems like Microservices are the de facto standard for a system architecture, but do they really live up to the hype?

The talk will show you an alternative approach - how we can tame complexity with the help of a clean, monolithic architecture that is modular to the core. Java has been deliberately built from the ground up on a modular basis: Methods, classes, packages. Additionally, the module system was introduced in Java 9. Modularity is based on the fundamental concepts of high cohesion and low coupling. We will look at these concepts, as well as some further measures, in detail. We'll check out what they are, how they are related to one another, and what the best practices are for applying them on all levels of the architecture.

The talk will show you how you can apply these basic concepts to develop a clean, monolithic architecture, based on Java 9 modules and the hexagonal architecture pattern. Finally, we'll learn how to achieve a clean microservice architecture based on a modular architecture.

About Marcus Biel

Marcus is a Clean Code evangelist who has authored a series of video tutorials that focus on teaching others how to create the cleanest and most well-structured code possible. As a conference speaker, he shares his ideas on Java Clean Code development. Marcus is also an author, technical book reviewer and JCP member. In 2017, Marcus was named TOP 13 Java influencer worldwide by jaxenter.com (http://bit.ly/top20JavaInfluencers). On his website Clean Code Academy, he offers comprehensive online training for Java Clean Coding (https://join.cleancodeacademy.com/).

You can follow Marcus on twitter at [**@MarcusBiel**](https://twitter.com/marcusbiel)

# **The Dublin Java User Group - Sponsor Messages**

**Stackand.Co** enrich the professional lives of Java / Scala software professionals - with over 20 years experience in the Irish ICT market, they have helped many great people elevate their careers.

Perhaps they can do the same for you working with companies [**like this one?**](https://recruit.zoho.com/recruit/ViewJob.na?digest=7NZDPrAwelZRR7pgbV1JQlg7fAI9NqhUofQ6ctM2P.8-&embedsource=Embed)

Website: [**Stackand.Co**](http://stackand.co) / Twitter: [**StackanddotCo**](https://twitter.com/stackanddotco)

Website: [**GuruTeamIrl.com**](http://guruteamirl.com) / Twitter: [**GuruTeamIreland**](https://twitter.com/guruteamireland)

**Equifax Technology Ireland** is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: [**Equifax.com**](https://equifax.com) / Twitter: [**Equifax**](https://twitter.com/equifax)

Website: [**Version1.com**](https://version1.com) / Twitter: [**Version1Tweets**](https://twitter.com/Version1Tweets)

Teckro's partnership with DubJUG means that they can interact and exchange ideas with some of Dublin’s best developers.

Website: [**Teckro.com**](http://Teckro.com) / Twitter: [**TeckroOfficial**](https://twitter.com/teckroofficial?lang=en)

Website: [**Sonorplex.com**](https://sonorplex.com) / Twitter: [**Sonorplex**](https://twitter.com/sonorplex)

Website: [**tcubedublin.com**](https://tcubedublin.com) / Twitter: [**tcubeDublin**](https://twitter.com/tcubedublin)

.
##**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted platinum member of the Ireland's longest running and most respected Java User Group.

We reserve the right to cancel bookings if the attendee is not aligned to the intended audience. No refunds for cancellations, no-shows or misalignments.

Past

Starting out with JUnit 5

11 Apr 2018

.
On the evening of 11th April, DubJUG co-lead Barry Evans ran a workshop built upon a session he attended at JavaOne.

Barry presented *Starting Out with JUnit 5*.

Doors opened at 18:15 (evening session).

Barry's workshop builds upon a JavaOne session he attended that was run by Jeanne Boyarsky, author of the official Oracle OCA/OCP study guides.

The difference between JUnit 4 and 5 is far bigger than the difference between 3 and 4. [**JUnit 5 was released**](https://junit.org/junit5/docs/5.0.0/user-guide/#release-notes-5.0.0) on 10th September 2017, so it is high time to learn about next-generation JUnit.

Attendees in this session will migrate a JUnit 4 application to JUnit 5, while learning what’s changed and the new styles of unit testing that JUnit 5 enables.

**NOTE: THIS IS A BRING YOUR OWN LAPTOP HANDS-ON LAB.**
.

**About Barry**

Barry is a seasoned web application engineer with over ten years experience developing enterprise applications in the financial sector. Presently, he is an Oracle Certified Senior Applications Consultant at DubJUG partner Version 1.

Barry is interested in meeting other JUG leaders, finding out what brings Java developers together, and to help the Dublin JUG in Ireland grow by getting involved with the global Java community.

You can follow him on twitter at [**@Bazza\_NI**](https://twitter.com/bazza\_ni)

# **The Dublin Java User Group - Sponsor Messages**

**Stackand.Co** enrich the professional lives of Java / Scala software professionals - with over 20 years experience in the Irish ICT market, they have helped many great people elevate their careers.

Perhaps they can do the same for you working with companies [**like this one?**](https://recruit.zoho.com/recruit/ViewJob.na?digest=7NZDPrAwelZRR7pgbV1JQlg7fAI9NqhUofQ6ctM2P.8-&embedsource=Embed)

Website: [**Stackand.Co**](http://stackand.co) / Twitter: [**StackanddotCo**](https://twitter.com/stackanddotco)

**Equifax Technology Ireland** is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: [**Equifax.com**](https://equifax.com) / Twitter: [**Equifax**](https://twitter.com/equifax)

Website: [**GuruTeamIrl.com**](http://guruteamirl.com) / Twitter: [**GuruTeamIreland**](https://twitter.com/guruteamireland)

Website: [**Version1.com**](https://version1.com) / Twitter: [**Version1Tweets**](https://twitter.com/Version1Tweets)

Teckro's partnership with DubJUG means that they can interact and exchange ideas with some of Dublin’s best developers.

Website: [**Teckro.com**](http://Teckro.com) / Twitter: [**TeckroOfficial**](https://twitter.com/teckroofficial?lang=en)

Website: [**Sonorplex.com**](https://sonorplex.com) / Twitter: [**Sonorplex**](https://twitter.com/sonorplex)

Website: [**tcubedublin.com**](https://tcubedublin.com) / Twitter: [**tcubeDublin**](https://twitter.com/tcubedublin)

.
##**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted platinum member of the Ireland's longest running and most respected Java User Group.

We reserve the right to cancel bookings if the attendee is not aligned to the intended audience. No refunds for cancellations, no-shows or misalignments.

[**SORRY EVENT FINISHED - CLICK HERE TO VIEW UPCOMING JAVA EVENTS**](https://ti.to/dublin-java-user-group/)

Past

Class Loaders, Spring and Java with Simon Maple

28 Mar 2018

Our March event was special! We hosted Java Champion and JavaOne Rockstar Simon Maple, Virtual JUG founder, London Java Community co-leader, RebelLabs author, and Duke’s Choice award winner.

Simon presented..

# **Do You Really Get Class Loaders**

##and

# **Productive and Effective Development with Spring and Java EE**

##Doors Open 18:15 (evening session)

Simon is an experienced speaker, having presented at JavaOne, JavaZone, Jfokus, DevoxxUK, DevoxxFR, JavaZone, JMaghreb and many more including many JUG tours. His passion is around user groups and communities.

When not traveling, Simon enjoys spending quality time with his family, cooking and eating great food.

You can follow him on twitter at [**@sjmaple**](https://twitter.com/sjmaple) and[**@virtualjug**](https://twitter.com/virtualjug)
.

##**Do You Really Get Class Loaders**

Class loaders are at the core of the Java language. Java EE containers, OSGi, NetBeans modules, Tapestry 5, Grails, and many others use class loaders heavily. Yet if something went wrong, would you know how to solve it?

This session takes a tour of the Java class loading mechanism, from both the JVM and developer points of view.

It looks at typical class loading problems and how to solve them. ClassNoDefError, IncompatibleClassChangeError, LinkageError, and many others are symptoms of specific things going wrong that you can usually find and fix.

For each problem, the presentation goes through a hands-on demo with a corresponding solution. It also takes a look at how and why class loaders leak and how you can remedy that.

##**Productive and Effective Development with Spring and Java EE**

This live coding session shines some light on a range of productivity tools that make software development a pleasure rather than a chore.

Simon will live-code two applications. The first, a Java EE application with JBoss Forge that uses JPA, Bean Validation, REST, and Angular, is tested with Arquillian from within JBoss Forge. You’ll see how a Java EE microservice can be developed in Forge and run with JBoss Swarm.

The second application is developed on Spring Boot, and you’ll see how to develop and run a Spring application with JRebel. You’ll learn how to write code productively with tools designed for developers.

# **The Dublin Java User Group - Sponsor Messages**

**Stackand.Co** enrich the professional lives of Java / Scala software professionals - with over 20 years experience in the Irish ICT market, they have helped many great people elevate their careers.

Perhaps they can do the same for you working with companies [**like this one?**](https://recruit.zoho.com/recruit/ViewJob.na?digest=7NZDPrAwelZRR7pgbV1JQlg7fAI9NqhUofQ6ctM2P.8-&embedsource=Embed)

Website: [**Stackand.Co**](http://stackand.co) / Twitter: [**StackanddotCo**](https://twitter.com/stackanddotco)

**Equifax Technology Ireland** is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: [**Equifax.com**](https://equifax.com) / Twitter: [**Equifax**](https://twitter.com/equifax)

Website: [**GuruTeamIrl.com**](http://guruteamirl.com) / Twitter: [**GuruTeamIreland**](https://twitter.com/guruteamireland)

Website: [**Version1.com**](https://version1.com) / Twitter: [**Version1Tweets**](https://twitter.com/Version1Tweets)

Teckro's partnership with DubJUG means that they can interact and exchange ideas with some of Dublin’s best developers.

Website: [**Teckro.com**](http://Teckro.com) / Twitter: [**TeckroOfficial**](https://twitter.com/teckroofficial?lang=en)

Website: [**Sonorplex.com**](https://sonorplex.com) / Twitter: [**Sonorplex**](https://twitter.com/sonorplex)

Website: [**tcubedublin.com**](https://tcubedublin.com) / Twitter: [**tcubeDublin**](https://twitter.com/tcubedublin)

.
##**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted platinum member of the Ireland's longest running and most respected Java User Group.

We reserve the right to cancel bookings if the attendee is not aligned to the intended audience. No refunds for cancellations, no-shows or misalignments.

[**SORRY EVENT FINISHED - CLICK HERE TO VIEW UPCOMING JAVA EVENTS**](https://ti.to/dublin-java-user-group/)

Past

Microservices in Action at the Dutch National Police & Vert.x

22 Feb 2018

For our second DubJUG event of 2018, we were very honoured to have Java Champion, JavaOne Rockstar, and leader of the NLJUG, Bert Jan Schrijver, come to Dublin to share his immense knowledge with our community. But this was not academic stuff! He shared real-life project cases, discussed why and how the Dutch National Police force implemented microservices, and why a startup uses the Vert.x event-driven, non-blocking, and polyglot toolkit for building reactive applications.

Bert Jan presented...

# **Microservices in Action at the Dutch National Police**

##and

# **Building Microservices with Vert.x**

##Doors Open 18:15 (evening session)

.
.

#**About Bert Jan Schrijver**

Bert Jan is a software craftsman at Dutch software consultancy JPoint and CTO at OpenValue. He has a strong focus on Java, Continuous Delivery and DevOps.

Bert Jan is a Java Champion, JavaOne Rock Star speaker and user group leader for NLJUG, the Dutch Java User Group. He loves to share his experience by speaking at conferences, writing for the Dutch Java magazine and helping out Devoxx4Kids with teaching kids how to code.

Follow Bert Jan on twitter at [**@bjschrijver**](https://twitter.com/bjschrijver)

.
.

# **Microservices in Action at the Dutch National Police**

Microservices? At the Police? Definitely!

At the Cloud, Big Data and Internet division of the Dutch National Police, 3 DevOps teams use the latest open source technology to build high tech web applications. These applications are used to support digital investigation and incident response with data from open, online sources and are built using Spring Boot, Angular 2.x, Spark, Kafka and Jenkins 2.

In this session, Bert Jan will share their experiences and real-world use cases for microservices. He will explain the architecture, why it was chosen, which challenges were faced and how this brought the three teams together to work on one product, loosely based on the models used by Spotify and Netflix.

Bert Jan will also share how the principles of DevOps and Continuous Delivery were applied, and how security, build pipelines, test automation, performance tests, automated deployments and monitoring were handled.

You'll leave this session with an understanding of how this approach enabled the team to have the agility of a startup within the large Police organisation.
.

# **Building Microservices with Vert.x**

Vert.x is a toolkit for building reactive applications on the JVM. It is event driven, non blocking and polyglot, which makes it an excellent platform for building microservices. It was awarded for 'Most Innovative Java Technology' at the JAX Innovation awards.

In this talk, Bert Jan will share experiences and real-world use cases from a Dutch company that started building reactive web applications with Vert.x about 4 years ago. You'll learn the concepts behind Vert.x, why Vert.x was chosen, how it is being used and the challenges that were faced.

Topics include the anatomy of the projects, (micro)services architecture, deployment model and DevOps, scalability, the upgrade from Vert.x 2 to Vert.x 3 and cooperation with the team behind Vert.x.

At the end of this session, you'll know enough about Vert.x to get started yourself right away!

##**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Due to the overwhelming demand to attend our events they are always full. On occasion, a small attendance fee may be required.

The organisers reserve the right to cancel the booking if the attendee is not aligned to the intended audience.

# **The Dublin Java User Group - Sponsor Messages**

**Stackand.Co** enrich the professional lives of Java / Scala software professionals - with over 20 years experience in the Irish ICT market, they have helped many great people elevate their careers.

Perhaps they can do the same for you working with companies [**like this one?**](https://recruit.zoho.com/recruit/ViewJob.na?digest=7NZDPrAwelZRR7pgbV1JQlg7fAI9NqhUofQ6ctM2P.8-&embedsource=Embed)

Website: [**Stackand.Co**](http://stackand.co) / Twitter: [**StackanddotCo**](https://twitter.com/stackanddotco)

**Equifax Technology Ireland** is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: [**Equifax.com**](https://equifax.com) / Twitter: [**Equifax**](https://twitter.com/equifax)

**GuruTeam's** 'crème de la crème' instructors deliver an enthusing and valuable learning experience, equipping attendees with the vital skills applicable to their careers, and bringing true business value to organisations they work with.

Upcoming courses include CI with Jenkins, Apache Hadoop, Data Science & Big Data Analytics, Spring, GIT, Linux Foundation™, Angular 2, and OpenStack™

Website: [**GuruTeamIrl.com**](http://guruteamirl.com) / Twitter: [**GuruTeamIreland**](https://twitter.com/guruteamireland)

Website: [**Version1.com**](https://version1.com) / Twitter: [**Version1Tweets**](https://twitter.com/Version1Tweets)

Teckro's partnership with DubJUG means that they can interact and exchange ideas with some of Dublin’s best developers.

Website: [**Teckro.com**](http://Teckro.com) / Twitter: [**TeckroOfficial**](https://twitter.com/teckroofficial?lang=en)

Website: [**Sonorplex.com**](https://sonorplex.com) / Twitter: [**Sonorplex**](https://twitter.com/sonorplex)

Website: [**tcubedublin.com**](https://tcubedublin.com) / Twitter: [**tcubeDublin**](https://twitter.com/tcubedublin)

[**SORRY EVENT FINISHED - CLICK HERE TO VIEW UPCOMING JAVA EVENTS**](https://ti.to/dublin-java-user-group/)

Past

Java EE 7 Meets Java 8 / Clustering MicroProfile Application using CDI and JCache

17 Jan 2018

With Java 8 EE taking way longer to release than first expected, it seemed like Java 9 EE could have been some time off, and since there were many companies in Dublin using Java 7, their engineers were interested in our first DubJUG event of 2018, which saw Senior Java EE Engineer Roberto Cortez from the Seattle-based startup Tomitribe talk about how Java EE 7 meets Java 8, and clustering MicroProfile applications using CDI and JCache.

Roberto presented...

# **Java EE 7 Meets Java 8**

##and

# **Cluster your MicroProfile Application using CDI and JCache**

##Doors Open 18:15 (evening session)

.
.

#**About Roberto Cortez**

Robert was born in Venezuela, but has spent most of his life in Coimbra, Portugal. With a degree in Informatics Engineering (equivalent to the Bologna Master’s degree) from the Department of Informatics Engineering of the University of Coimbra, he has been working as a Java Developer for 10 years in business areas like Finance, Insurance and Government.

Roberto works with many Java based technologies like JavaEE, Spring, Hibernate, GWT, JBoss AS and Maven just to name a few, always relying on IntelliJ IDEA, which he says is his favourite IDE.

As a Freelancer / Independent Contractor he travels the world to customers, but also to speak at Java conferences. The direct contact with the Java community made him want to become an active member in the community itself. For that reason, he created the Coimbra Java User Group, and started to contribute to Open Source on Github so he can share some of the knowledge that he has gained over the years.

After working for a few major corporations, he became eager to help and grow something from the ground up, so currently works with Seattle based start-up Tomitribe which focus on developing and supporting TomEE, a Java Application server based on Tomcat with Java EE support.

Follow Roberto on twitter at [**@radcortez**](https://twitter.com/radcortez)

.
.

# **Java EE 7 Meets Java 8**

The last few years have been pretty exciting for Java with new versions of EE and SE platforms.

Java EE, introduced a new API to build WebSockets; a new API to parse, process and generate JSON; a new Client API in JAX-RS to invoke REST services, and finally the Batch Processing API to build batch applications.

Java SE brought us the long awaited Lambda expressions; the powerful Streams API to perform operations like filtering, mapping or sorting in a very easy and fluent way, and a brand new Date Time API, to deal with the complexities of Timezones and Periods.

This session will combine all of these elements together and show you how to easily develop an application using Java SE 8 with Java EE 7, with live coding and samples.

.
.

# **Cluster your MicroProfile Application using CDI and JCache**

Microprofile is a new platform definition that optimizes Enterprise Java for a Microservices Architecture and delivers application portability across multiple runtimes. You can use a subset of the Java EE specifications to develop Microprofile applications, with JAX-RS, CDI and JSON-P. Now you need to make it highly available and scalable across a large number of machines.

The session will feature a live coding demo where we will turn this Microprofile application, into a fully clustered application using only standard Java API’s. Finally, to show you how light it is, we will run the entire cluster in a set up of Raspberry PI’s.

##**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Due to the overwhelming demand to attend our events they are always full. On occasion, a small attendance fee may be required.

The organisers reserve the right to cancel the booking if the attendee is not aligned to the intended audience.

# **The Dublin Java User Group - Sponsor Messages**

**Stackand.Co** enrich the professional lives of Java / Scala software professionals - with over 20 years experience in the Irish ICT market, they have helped many great people elevate their careers.

Perhaps they can do the same for you working with companies [**like this one?**](https://recruit.zoho.com/recruit/ViewJob.na?digest=7NZDPrAwelZRR7pgbV1JQlg7fAI9NqhUofQ6ctM2P.8-&embedsource=Embed)

Website: [**Stackand.Co**](http://stackand.co) / Twitter: [**StackanddotCo**](https://twitter.com/stackanddotco)

**Equifax Technology Ireland** is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: [**Equifax.com**](https://equifax.com) / Twitter: [**Equifax**](https://twitter.com/equifax)

Upcoming courses include CI with Jenkins, Apache Hadoop, Data Science & Big Data Analytics, Spring, GIT, Linux Foundation™, Angular 2, and OpenStack™

Website: [**GuruTeamIrl.com**](http://guruteamirl.com) / Twitter: [**GuruTeamIreland**](https://twitter.com/guruteamireland)

Website: [**Version1.com**](https://version1.com) / Twitter: [**Version1Tweets**](https://twitter.com/Version1Tweets)

Teckro's partnership with DubJUG means that they can interact and exchange ideas with some of Dublin’s best developers.

Website: [**Teckro.com**](http://Teckro.com) / Twitter: [**TeckroOfficial**](https://twitter.com/teckroofficial?lang=en)

Website: [**Sonorplex.com**](https://sonorplex.com) / Twitter: [**Sonorplex**](https://twitter.com/sonorplex)

Website: [**tcubedublin.com**](https://tcubedublin.com) / Twitter: [**tcubeDublin**](https://twitter.com/tcubedublin)

[**SORRY EVENT FINISHED - CLICK HERE TO VIEW UPCOMING JAVA EVENTS**](https://ti.to/dublin-java-user-group/)

Past

Java Challenges - An Interactive Quiz Testing You!

13 Dec 2017

Our last event of 2017 saw Barry Evans and Rafael Chinelato Del Nero present *10 Java Challenges*, an interactive Java quiz that stretched attendees’ grey matter. Representing the Dublin Java User Group, the duo had first presented *Java Challenges* at JavaOne and had since put developers in Belfast, Brazil, and Bangladesh to the test — so it was about time they challenged you guys in Dublin too. Well done to Synchronoss guys Brian Matthews and Fatih Aydin, who scored 8/10!

# **Java Challenges**

##by

# **Barry Evans and Rafael Chinelato Del Nero**

##Doors Open 18:15

**Your Speakers**

**Barry Evans** is a seasoned web application engineer with over 10 years experience developing enterprise applications predominantly in the financial sector. Presently, he is an Oracle Certified Senior Applications Consultant at DubJUG partner Version 1, where he has been using Java SE, Spring, and ORM to build middleware for RIA apps written in Adobe Flex & AS3, Angular JS, and HTML 5.

Recently OCP Java SE 8 certified, he is keen to increase his knowledge with Java EE and is working towards the OCMJEA certification.

Barry is also interested in meeting other JUG leaders, finding out what brings Java developers together, and to help the Dublin JUG in Ireland grow by getting involved with the global Java community.

You can follow him on twitter at [**@Bazza\_NI**](https://twitter.com/bazza\_ni)

**Rafael Chinelato Del Nero** believes there are many techniques involved in creating high-quality software that developers are often unaware of. His life's purpose is to help Java developers use best programming practices to code quality software for stress-free projects with fewer bugs

He is creator of [**NoBugsProject**](https://twitter.com/search?q=nobugsproject&src=typd), and is the author of "No Bugs, No Stress - Create a Life Changing Software Without Destroying Your Life."

You can follow him on twitter at [**@RafaDelNero**](https://twitter.com/RafaDelNero)

##**Java Challenges - Learn the Concepts Behind 10 Java Challenges and Eliminate Stressful Bugs**

Bugs are a daily stress in our work as Java developers. Those pesky bugs hide behind important Java concepts; there is no way out of this.

**But can we have fun hunting them? You bet!**

How about solving a series of Java puzzles and challenges as a way to learn concepts and save a lot of time finding those tricky bugs?

Together with Barry and Rafael, attendees can solve fun Java challenges and gain a clear understanding of what causes the most stressful Java bugs—and have fun eliminating them from your projects.

##**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Due to the overwhelming demand to attend our events they are always full. On occasion, a small attendance fee may be required.

The organisers reserve the right to cancel the booking if the attendee is not aligned to the intended audience.

# **The Dublin Java User Group - Sponsor Messages**

**Stackand.Co** enrich the professional lives of Java / Scala software professionals - with over 20 years experience in the Irish ICT market, they have helped many great people elevate their careers.

Perhaps they can do the same for you working with companies [**like this one?**](https://recruit.zoho.com/recruit/ViewJob.na?digest=7NZDPrAwelZRR7pgbV1JQlg7fAI9NqhUofQ6ctM2P.8-&embedsource=Embed)

Website: [**Stackand.Co**](http://stackand.co) / Twitter: [**StackanddotCo**](https://twitter.com/stackanddotco)

**Equifax Technology Ireland** is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: [**Equifax.com**](https://equifax.com) / Twitter: [**Equifax**](https://twitter.com/equifax)

Upcoming courses include CI with Jenkins, Apache Hadoop, Data Science & Big Data Analytics, Spring, GIT, Linux Foundation™, Angular 2, and OpenStack™

Website: [**GuruTeamIrl.com**](http://guruteamirl.com) / Twitter: [**GuruTeamIreland**](https://twitter.com/guruteamireland)

Website: [**Version1.com**](https://version1.com) / Twitter: [**Version1Tweets**](https://twitter.com/Version1Tweets)

Teckro's partnership with DubJUG means that they can interact and exchange ideas with some of Dublin’s best developers.

Website: [**Teckro.com**](http://Teckro.com) / Twitter: [**TeckroOfficial**](https://twitter.com/teckroofficial?lang=en)

Website: [**Sonorplex.com**](https://sonorplex.com) / Twitter: [**Sonorplex**](https://twitter.com/sonorplex)

Website: [**tcubedublin.com**](https://tcubedublin.com) / Twitter: [**tcubeDublin**](https://twitter.com/tcubedublin)

[**SORRY EVENT FINISHED - CLICK HERE TO VIEW UPCOMING JAVA EVENTS**](https://ti.to/dublin-java-user-group/)

Past

Class Loaders, Spring and Java with Simon Maple

06 Dec 2017

Our March event was special! We hosted Java Champion and JavaOne Rockstar Simon Maple, founder of the Virtual JUG, co-leader of the London Java Community, RebelLabs author, and Duke’s Choice award winner.

Simon presented...

# **Do You Really Get Class Loaders**

##and

# **Productive and Effective Development with Spring and Java EE**

##Doors Open 18:15 (evening session)

.
Simon is an experienced speaker, having presented at JavaOne, JavaZone, Jfokus, DevoxxUK, DevoxxFR, JavaZone, JMaghreb and many more including many JUG tours. His passion is around user groups and communities.

When not traveling, Simon enjoys spending quality time with his family, cooking and eating great food.

You can follow him on twitter at [**@sjmaple**](https://twitter.com/sjmaple), [**@virtualjug**](https://twitter.com/virtualjug) and [**@zeroturnaround**](https://twitter.com/zeroturnaround)

##**Do You Really Get Class Loaders**

This session takes a tour of the Java class loading mechanism, from both the JVM and developer points of view.

For each problem, the presentation goes through a hands-on demo with a corresponding solution. It also takes a look at how and why class loaders leak and how you can remedy that.

##**Productive and Effective Development with Spring and Java EE**

This live coding session shines some light on a range of productivity tools that make software development a pleasure rather than a chore.

##**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Better still, email Team@DubJUG..org and we'll tell you how to become a coveted platinum member of the Ireland's longest running and most respected Java User Group.

We reserve the right to cancel bookings if the attendee is not aligned to the intended audience.

# **The Dublin Java User Group - Sponsor Messages**

**Stackand.Co** enrich the professional lives of Java / Scala software professionals - with over 20 years experience in the Irish ICT market, they have helped many great people elevate their careers.

Perhaps they can do the same for you working with companies [**like this one?**](https://recruit.zoho.com/recruit/ViewJob.na?digest=7NZDPrAwelZRR7pgbV1JQlg7fAI9NqhUofQ6ctM2P.8-&embedsource=Embed)

Website: [**Stackand.Co**](http://stackand.co) / Twitter: [**StackanddotCo**](https://twitter.com/stackanddotco)

**Equifax Technology Ireland** is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: [**Equifax.com**](https://equifax.com) / Twitter: [**Equifax**](https://twitter.com/equifax)

Upcoming courses include CI with Jenkins, Apache Hadoop, Data Science & Big Data Analytics, Spring, GIT, Linux Foundation™, Angular 2, and OpenStack™

Website: [**GuruTeamIrl.com**](http://guruteamirl.com) / Twitter: [**GuruTeamIreland**](https://twitter.com/guruteamireland)

Website: [**Version1.com**](https://version1.com) / Twitter: [**Version1Tweets**](https://twitter.com/Version1Tweets)

Teckro's partnership with DubJUG means that they can interact and exchange ideas with some of Dublin’s best developers.

Website: [**Teckro.com**](http://Teckro.com) / Twitter: [**TeckroOfficial**](https://twitter.com/teckroofficial?lang=en)

Website: [**Sonorplex.com**](https://sonorplex.com) / Twitter: [**Sonorplex**](https://twitter.com/sonorplex)

Website: [**tcubedublin.com**](https://tcubedublin.com) / Twitter: [**tcubeDublin**](https://twitter.com/tcubedublin)

[**SORRY EVENT FINISHED - CLICK HERE TO VIEW UPCOMING JAVA EVENTS**](https://ti.to/dublin-java-user-group/)

Past

Java 9 and the Eclipse Collection with Nikhil Nanivadekar

28 Nov 2017

Towards the end of November, we hosted the lead of the Eclipse Collections project, Nikhil Nanivadekar, as he whistle-stopped around Europe and beyond. Nikhil, who is also a VP at Goldman Sachs, was a regular sight at the world’s top Java conferences.

Nikhil presented...

# **How to Make a Project Java 9-Compatible**

##and

# **Collections.compare: JDK, Eclipse, Guava, Apache...**

##Doors Open 18:15 (evening session)

.
Nikhil Nanivadekar is a Vice President in Private Wealth Management in the Technology division of Goldman Sachs, and is also the project lead and committer for Eclipse Collections. He graduated in 2012 from University of Utah with a Masters in Mechanical Engineering with specialization in Robotics and Controls.

He has presented at JavaOne, DevoxxUS and Java User Group meetups. He is passionate about robotics has conducted robotics workshops at JCrete4Kids, JavaOne4Kids and Devoxx4Kids.

You can follow him on twitter at [**@NikhilNanivade**](https://twitter.com/NikhilNanivade)

##**How to Make a Project Java 9-Compatible**

Java 9 brings numerous changes that might break existing applications. This presentation is a case study of making a third-party Java Collections library (Eclipse Collections) Java 9–compatible.

You will get an overview of all the steps taken and the evolution of the final, Java 9–compatible product. These steps are essentially similar to those you might have to take to upgrade your application to use JDK 9.

The session covers available tooling and simple yet practical tips and tricks that will help you in the upgrade process.

##**Collections.compare: JDK, Eclipse, Guava, Apache...**

Collections are a staple in any programming language: the need to collect, sort, or iterate over values is needed by nearly all developers. The Java language introduced the Collections framework long ago. It has plenty to offer, but many find it lacking: the number of collection libraries as active open source projects demonstrates the need for something else.

This session does a holistic comparison of the most-common collections (pun intended!) frameworks, what they have to offer, and what you should consider for your next project. It also shows common programmer use cases; how each library handles them; and the impact on memory, processing power, and ease of use/coding.

Come and let us help you choose the right bag for your tricks!

##**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

Due to the overwhelming demand to attend our events they are always full. On occasion, a small attendance fee may be required.

The organisers reserve the right to cancel the booking if the attendee is not aligned to the intended audience.

# **The Dublin Java User Group - Sponsor Messages**

**Stackand.Co** enrich the professional lives of Java / Scala software professionals - with over 20 years experience in the Irish ICT market, they have helped many great people elevate their careers.

Perhaps they can do the same for you working with companies [**like this one?**](https://recruit.zoho.com/recruit/ViewJob.na?digest=7NZDPrAwelZRR7pgbV1JQlg7fAI9NqhUofQ6ctM2P.8-&embedsource=Embed)

Website: [**Stackand.Co**](http://stackand.co) / Twitter: [**StackanddotCo**](https://twitter.com/stackanddotco)

**Equifax Technology Ireland** is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: [**Equifax.com**](https://equifax.com) / Twitter: [**Equifax**](https://twitter.com/equifax)

Upcoming courses include CI with Jenkins, Apache Hadoop, Data Science & Big Data Analytics, Spring, GIT, Linux Foundation™, Angular 2, and OpenStack™

Website: [**GuruTeamIrl.com**](http://guruteamirl.com) / Twitter: [**GuruTeamIreland**](https://twitter.com/guruteamireland)

Website: [**Version1.com**](https://version1.com) / Twitter: [**Version1Tweets**](https://twitter.com/Version1Tweets)

Teckro's partnership with DubJUG means that they can interact and exchange ideas with some of Dublin’s best developers.

Website: [**Teckro.com**](http://Teckro.com) / Twitter: [**TeckroOfficial**](https://twitter.com/teckroofficial?lang=en)

Website: [**Sonorplex.com**](https://sonorplex.com) / Twitter: [**Sonorplex**](https://twitter.com/sonorplex)

Website: [**tcubedublin.com**](https://tcubedublin.com) / Twitter: [**tcubeDublin**](https://twitter.com/tcubedublin)

[**SORRY EVENT FINISHED - CLICK HERE TO VIEW UPCOMING JAVA EVENTS**](https://ti.to/dublin-java-user-group/)

Past

Top Ways to Deliver Java Code to the Cloud

31 Oct 2017

Our final October meetup was presented by Las Vegas-based Microsoft Developer Advocate Brian Benz, who showed some of the easiest ways for Java developers to deliver their code to the cloud using Linux command line tools.

Brian was a Senior Developer Advocate at Microsoft, helping Java developers get the most out of Azure. Before joining Microsoft, he had been a solution architect, consultant, developer, author, and presenter at IBM, Deloitte, and other companies.

You could follow him on Twitter at @bbenz.

##**Top Ways to Deliver Your Java Code to the Cloud**

Brian will highlight the easiest ways for Java developers to deliver their code to the cloud and the best ways to reliably make updates and maintain production cloud code.

The focus will be on real-world examples using Linux command line tools, open source tools such as Jenkins, and other free SDKs and tools available on GitHub.

The examples, tools and demos that he shows will be applicable to any cloud platform, and all are available on GitHub. He will show Microsoft Azure running the samples - this is a technical talk that will focus on the code.

##**REGISTRATION NOTES**

The Dublin Java User Group meetups are designed to enhance the knowledge of developers and technology professionals.

To reduce the number of people who do not show up, there is a small attendance cost. But sure, you'll get the value back in knowledge, beer and pizza! We also offer a limited number of free tickets.

Due to the overwhelming demand to attend our events they are always full so make sure you're subscribed to the wait-list to get the release notification.

We reserve the right to cancel bookings if the attendee is not aligned to the intended audience.

**Doors Open 18:15 / Presentations 19:00**

# **The Dublin Java User Group - Sponsor Messages**

**Stackand.Co** enrich the professional lives of Java / Scala software professionals - with over 20 years experience in the Irish ICT market, they have helped many great people elevate their careers.

Perhaps they can do the same for you working with companies [**like this one?**](https://recruit.zoho.com/recruit/ViewJob.na?digest=7NZDPrAwelZRR7pgbV1JQlg7fAI9NqhUofQ6ctM2P.8-&embedsource=Embed)

Website: [**Stackand.Co**](http://stackand.co) / Twitter: [**StackanddotCo**](https://twitter.com/stackanddotco)

**Equifax Technology Ireland** is the Research and Development arm of global credit scoring organisation Equifax - it has recently opened a technology centre in the Bloodstone Building, Dublin 2.

Now looking for developers!

Website: [**Equifax.com**](https://equifax.com) / Twitter: [**Equifax**](https://twitter.com/equifax)

Upcoming courses include CI with Jenkins, Apache Hadoop, Data Science & Big Data Analytics, Spring, GIT, Linux Foundation™, Angular 2, and OpenStack™

Website: [**GuruTeamIrl.com**](http://guruteamirl.com) / Twitter: [**GuruTeamIreland**](https://twitter.com/guruteamireland)

Website: [**Version1.com**](https://version1.com) / Twitter: [**Version1Tweets**](https://twitter.com/Version1Tweets)

Teckro's partnership with DubJUG means that they can interact and exchange ideas with some of Dublin’s best developers.

Website: [**Teckro.com**](http://Teckro.com) / Twitter: [**TeckroOfficial**](https://twitter.com/teckroofficial?lang=en)

Website: [**Sonorplex.com**](https://sonorplex.com) / Twitter: [**Sonorplex**](https://twitter.com/sonorplex)

Website: [**tcubedublin.com**](https://tcubedublin.com) / Twitter: [**tcubeDublin**](https://twitter.com/tcubedublin)

[**SORRY EVENT FINISHED - CLICK HERE TO VIEW UPCOMING JAVA EVENTS**](https://ti.to/dublin-java-user-group/)