DenverJUG

Wednesday February 9th, 2022

Watch on YouTube: https://www.youtube.com/watch?v=M9AbUTXSmPc

5:30-5:45: Announcements

5:45-7:15: Security Vulnerabilities for Java Developers

Ever seen a security-related issue that you felt should be reported? Unsure of how reporting security issue is different than a regular bug? Developers of any level should know how to report a vulnerability. In this talk, we will talk about what CVEs are, some general vulnerability classifications, look at a few ways you can report security issues, as well as look at a few common mistakes.

Knowing how to report a vulnerability is just half the battle, you also need to keep your applications free of them. We will dig into the recent Log4Shell vulnerability and discuss lessons learned when scrambling to update versions. Finally, we will talk about how this scramble can be avoided by getting notifications when new security issues are announced, and how to keep your applications updated automatically.

This talk is geared toward non-security professionals.

About Brian Demers

Brian Demers is a Developer Advocate at Okta, a Java Champion, and a PMC member for the Apache Shiro project. He spends much of his day contributing to OSS projects in the form of writing code, tutorials, blogs, and answering questions. Along with typical software development, Brian also has a passion for fast builds and automation. Away from the keyboard, Brian is a beekeeper and can likely be found playing board games.

You can find Brian on Twitter at @briandemers (https://twitter.com/briandemers).

7:15-7:30: Q & A

The live streaming of this meetup is sponsored by Okta (https://developer.okta.com/).

Wednesday, January 12th, 2022

Watch on YouTube: https://www.youtube.com/watch?v=3LH9tJ6qSGQ

5:30-5:45: Announcements

5:45-7:15: Coding Interviews for Java Developers

In the year 2000 – Joel Spolsky released his first “guerilla guide to interviewing” (most current version from 2006) https://www.joelonsoftware.com/2006/10/25/the-guerrilla-guide-to-interviewing-version-30/

This really started to set the standard for the modern software engineer interview. In particular, this quote set the tone:

“Most of the time in the interview, though, should be spent letting the candidate prove that they can write code.”

Somewhere along the line, we started to suspect that maybe there were a lot of SE candidates who couldn’t actually write code, so making candidates write code became a standard practice.

Not all of us are performers or perform well under pressure, or with someone watching. Some of us don’t spend our nights and weekends working on toy problems, and the day-to-day code we work on is anything but a toy problem, or we work in an application framework or work on code that’s in maintenance mode where we’re not really writing tons of new code from scratch – when was the last time you wrote a main() method? So the coding exercise is an alien environment.

I’ll talk about general advice for live coding, as well as some strategies for succeeding in these coding exercises, particularly the live coding variety, with an emphasis on pitfalls for using Java in live coding interviews and strategies for getting around them.

About Gordon Weakliem

Gordon Weakliem has worked as a professional software developer for over 25 years. He has worked in distributed systems since the days when CORBA was the next big thing, and has worked extensively with HTTP based services, as well as large scale distributed data platforms. He has worked in the travel industry at companies like Sabre, Galileo, and Vrbo, and currently works for SiriusXM / Pandora Media supporting the Marketing team with big data analytics. In addition, Gordon is a Senior Interview Engineer with Karat, an online interview platform, and has conducted hundreds of coding interviews.

You can find Gordon on LinkedIn at @gweakliem (https://www.linkedin.com/in/gweakliem/).

7:15-7:30: Q & A

The live streaming of this meetup is sponsored by Okta (https://developer.okta.com/).

Watch on YouTube: https://youtu.be/TTc7rZACvQk

5:30-5:45: Announcements

5:45-7:15: Moving Java Forward…Together

The last 25 years have shown that Java has enriched the world we live in. Applications of all shapes and all sizes target a wide and diverse set of use cases. The foundation is strong! But, how will the next 25 years and beyond look like? That future is influenced so much by you, the developer community. And this session will focus on what you can do to participate to ensure the future remains bright. Learn about the many channels you can use to move Java forward.

About Sharat Chander

Sharat Chander (Senior Director, Java Developer Advocacy) has been driving the Java ecosystem forward for over 20 years. His focus is to help raise the value of the Java community, which helps keep the technology relevant for now and the future, as well as grow the visibility of Java to drive its adoption worldwide.

You can find Sharat on Twitter at https://twitter.com/Sharat_Chander.

7:15-7:30: Q & A

The live streaming of this meetup is sponsored by Okta (https://developer.okta.com/).

Wednesday October 13, 2021

Watch on YouTube: https://www.youtube.com/watch?v=yynucMPwmRk, September 8th,  2021 starting at 5:30pm MT

5:30-5:45: Announcements

5:45-7:15: Spinnaker and Kubernetes

Back in 2005, when an unknown program called Hudson came onto the scene, I was pretty excited. I had used CruiseControl up to that point and was getting pretty comfortable with the notion of Continuous Integration. Hudson had terrific graphics and an intuitive UI, unlike Cruise Control with XML-laden directives. I thought the future was here. Then some cracks started showing, particularly in the delivery aspect of Hudson. I had used a Tomcat plugin, but trying to get a jar, use various environments, became a juggling act. Then came Docker, and I loved it because we get to deploy an image! No more SSHing into a box and messing things up. We had immutability.

Now, we have Kubernetes, a system that takes these immutable containers and monitors them, among other great features. Jenkins still has its place but as CI, Continuous Integration. In this presentation, I will demonstrate Spinnaker, a system developed by Netflix for CD, Continuous Delivery. I will demonstrate how to set up, deploy, monitor, rollback, and scale our pods with the ease of just selecting an item on a menu.

Topics include:

– Discuss Artifacts and Accounts
– Administering with Halyard
– Run a Jenkins Job to Triggering a Kubernetes Job
– Manage Deployments
– Baking

About Daniel Hinojosa

Daniel is a programmer, consultant, instructor, speaker, and recent author. With over 20 years of experience, he does work for private, educational, and government institutions. He is also currently a speaker for the No Fluff Just Stuff tour. Daniel loves JVM languages like Java, Groovy, and Scala; but also dabbles with non-JVM languages like Haskell, Ruby, Python, LISP, C, C++. He is an avid Pomodoro Technique Practitioner and makes every attempt to learn a new programming language every year. For downtime, he enjoys reading, swimming, Legos, football, and barbecuing.

You can find Daniel on Twitter at @dhinojosa (https://twitter.com/dhinojosa).

7:15-7:30: Q & A

The live streaming of this meetup is sponsored by Okta (https://developer.okta.com/).

Details

Wednesday May 12th, 2021

Watch on YouTube: https://www.youtube.com/watch?v=6NHBI2MojA8

5:30-5:45: Announcements

5:45-7:15: How and Why to Upgrade to Java 16 or 17

Java upgrades are sometimes seen as difficult and many applications are still running on an older version of Java. This session describes Java’s current six months release process and why applications should use a recent Java version.

After that, I’ll explain the challenges of upgrading and provide some useful tips to make the process easier. Concrete examples (including solutions) will be used to show you how to upgrade your application to Java 16 or 17.

About Johan Janssen

Johan is working as a software architect at Sanoma Learning. He has been working for various demanding companies where rapidly delivering high-quality software was very important. Johan regularly writes articles and presents about various subjects, but mainly around Java. He has spoken in 20 countries at more than 40 different conferences such as JavaOne, GOTO Amsterdam/Berlin/Copenhagen, Devoxx BE/UK/PL, JavaZone, J-Fall, Jfokus, JavaLand, Scala Days Berlin/New York. Johan received the JavaOne Rock Star and Oracle Code One Star awards.

You can find Johan on Twitter @johanjanssen42 (https://twitter.com/johanjanssen42).

7:15-7:30: Q & A

The live streaming of this meetup is sponsored by Okta (https://developer.okta.com/).

Wednesday, April 14, 2021
Watch on YouTube: https://www.youtube.com/watch?v=ddK4Wu1fY4I

5:30-5:45: Announcements

5:45-7:15: Managing State in Elastic Microservices

Scaling stateless services is easy, but scaling their stateful data stores, not so much. This is true whether you are using an “old fashioned” relational database, or one of the popular, “modern” KV data stores, such as MongoDB or Redis.

In this presentation, we will discuss some of the issues with state management in elastic microservices today, and look into how Coherence Community Edition, with its Helidon and Eclipse MicroProfile integration, provides a better alternative you can use tomorrow.

About Aleks Seović

Aleks Seović is an architect at Oracle, where he works on Oracle Coherence, a leading in-memory data grid product, and contributes to the Helidon microservices framework. Most recently, Aleks led the design and implementation of the Helidon gRPC framework, as well as CDI and Eclipse MicroProfile support in Coherence. He currently leads the implementation of Coherence native clients, GraphQL support, and Spring integration.

Prior to joining Oracle in 2016, Aleks led a boutique consultancy practice, where he worked with customers around the world to help them implement mission-critical applications on top of Coherence.

Aleks is the author of “Oracle Coherence 3.5” (Packt Publishing, 2010) and frequently speaks about and evangelizes Coherence at industry conferences, Java and .NET user group events, and Coherence SIGs.

You can find Aleks on Twitter @aseovic (https://twitter.com/aseovic).

7:15-7:30: Q & A

The live streaming of this meetup is sponsored by Okta (https://developer.okta.com/).

Online Event – Wednesday March 10, 2021. Watch live at https://www.youtube.com/watch?v=TbCOVruJGHc

Foojay (http://foojay.io) is the new Java community platform with everything you need to do your daily Java development work — with reference materials on the latest OpenJDK versions, vendors, and distributions, together with insights into the latest quarterly updates, articles, blogs, tips and tricks, and much more. And all for free, accompanied by a Slack channel for discussion on all things Java and OpenJDK. Follow @foojaio on Twitter (https://twitter.com/foojayio).

To celebrate and introduce Foojay.io, members of the Foojay community are doing a JUG tour and one of the stops is right here. Come join in, learn about Foojay, and hear Steve Chin speak on JavaFX.

5:45-7:15: Modern Java Clients with JavaFX: The Definitive Guide

This session is for professionals building Java applications for desktop, mobile, and embedded devices in the Cloud age. It will help you to build enhanced visual experiences and to deploy modern, easy to maintain, client applications across a variety of platforms.

These applications can take advantage of the latest user interface components, 3D technology, and cloud services to create immersive visualizations and allow high-value data manipulation. Learn how to leverage the latest open-source Java client technologies to build rich, responsive, and modern UIs from the authors of the definitive Java Client reference.

About Steve Chin

Stephen Chin is Senior Director of Developer Relations at JFrog, author of Raspberry Pi with Java, The Definitive Guide to Modern Client Development, and Pro JavaFX Platform. He has keynoted numerous Java conferences around the world including Oracle Code One (formerly JavaOne), where he is an 8-time Rock Star Award recipient. Stephen is an avid motorcyclist who has done evangelism tours in Europe, Japan, and Brazil, interviewing hackers in their natural habitat and posting the videos on http://nighthacking.org/. When he is not traveling, he enjoys teaching kids how to do embedded and robot programming together with his teenage daughter.

You can find Steve on Twitter @steveonjava (https://twitter.com/steveonjava).

7:15-7:30: Q & A

The live streaming of this meetup is sponsored by Okta (https://developer.okta.com/).