DenverJUG

Wednesday, January 11 2023

Hello Denver Java Enthusiasts!

We’re starting at a new location in 2023 – Thrive Workplace in Cherry Creek. If you’re looking for a co-working location, they’re excellent!

We figure it’s best to start small and grow to a bigger space as needed. There is paid parking nearby the venue. We look forward to seeing you!

5:30-6:00: Food, Soda, Beer, and Networking

6:00-6:15: Announcements

6:15-7:45: Java meets TypeScript: building a full-stack reactive web app with Spring Boot

As Java developers, we know the benefits of type-safety when building apps. The problem? Usually, that type-safety ends when we leave the server. What if it didn’t have to be that way?

In this presentation, you’ll learn how to build a full-stack reactive web app through live code examples. We’ll use Spring Boot and Java on the backend and React with TypeScript on the frontend, connecting the two with the new Hilla framework from Vaadin.

About Marcus Hellberg:

Marcus is a long-time Java and web developer, always curious to learn new things. He’s interested in combining modern web technologies and Java. Marcus loves teaching developers about cool new technologies and has presented at over 100 conferences and user groups around the world. He currently leads Developer Relations at Vaadin.

You can find Marcus on Twitter at @marcushellberg.

7:45: Door prizes sponsored by JFrog and Intellij.

The post-event festivities are sponsored by Okta.

This event will be held in Boulder at Rule 4(Directions):

3002 Bluff St #100
Boulder, CO 80301

It’s our first in-person event in quite some time and the speaker is Venkat! There will be no live stream or recording. It’ll be worth the drive and carpooling is a great way to build community. 😊

See the Boulder meetup page for more information. The information below is copied from this page.

Exception Handling in Functional and Reactive Programming

Functional and reactive programming is gaining popularity and use. One hurdle developers face using these approaches is in exception handling. Dealing with exceptions in these styles is confusing in the beginning and is often messy and error prone.

In this presentation we will step back and take a closer look at exception handling, about their role in functional and reactive programming, and discuss the dos and don’ts for exception handling. We will learn using concrete examples and live coding to illustrate the problem and the possible solutions.

Venkat is an international rock star, always insightful, informative, entertaining and a dry sly sense of humor!

About Venkat Subramaniam

Dr. Venkat Subramaniam is an award-winning author, founder of Agile Developer, Inc., and an instructional professor at the University of Houston.

He has trained and mentored thousands of software developers in the US, Canada, Europe, and Asia, and is a regularly-invited speaker at several international conferences. Venkat helps his clients effectively apply and succeed with sustainable agile practices on their software projects.

Venkat is a (co)author of multiple technical books, including the 2007 Jolt Productivity award winning book Practices of an Agile Developer. You can find a list of his books at agiledeveloper.com. You can reach him by email at venkats@agiledeveloper.com or on Twitter at @venkat_s.

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

5:30-5:45: Announcements

5:45-7:15: Foundational Kubernetes and Container Security

Security is a complex topic that can slow your team down, by adding too much complexity. This talk will cover some basic steps to improve your container and Kubernetes security posture. Come learn the foundational security basics that are critical for running applications in Kubernetes.

About Chris Love

Chris Love is a Google Cloud Certified hybrid Multi-cloud Fellow, and a Co-founder of Lionkube. He has over 25 years of software and IT engineering experience with companies including Google, Oracle, VMWare, Cisco, Johnson & Johnson, and others. As a thought leader within Kubernetes and the DevOps community, Chris Love has contributed to many open source projects including Kubernetes, kops (former AWS SIG lead), Bazel (contributed to Kubernetes rules), and Terraform (an early contributor to the VMware plugin). His professional interests include, IT culture transformation, containerization technologies, automated testing frameworks and practices, Kubernetes, Golang AKA Go and other programming languages. Love also enjoys speaking around the world about DevOps, Kubernetes, and Technology; as well as mentoring people in the IT and Software industry.

Outside of work Love enjoys skiing, volleyball, yoga, and other outdoor activities that come with living in Colorado. He’s also a practicing martial artist for over 20 years.

If you’re interested in having virtual coffee or have questions for Chris, you can contact him at @chrislovecnm on Twitter or LinkedIn.

5:30-5:45: Announcements

5:45-7:15: What does a Java Developer Need to Know about DevOps???

A day in the life of a Java dev includes coding up new features and fixing bugs. But what happens after you’ve committed your code, and why would/should a developer care?

The process of developing and delivering an application to production can be an overwhelming task with a number of steps. Melissa will explain the DevOps methodology, discuss DevOps implementations, and walk through what all is involved. After learning about dependency management, CI/CD, supply chain security, production packaging and updates, it will be clear why a Java developer would (and SHOULD!) want to be aware of what is going on in their software delivery pipeline. Learn how a strong knowledge of DevOps will inform and guide your decisions as a developer!

About Melissa McKay

Melissa is passionate about Java, DevOps and Continuous Delivery. She loves sharing her knowledge with the community as a developer, speaker, and author. Melissa has been recognized as a Java Champion and Docker Captain, is an international speaker at events including Kubecon and DockerCon, and is co-author of the recently released O’Reilly title, DevOps Tools for Java Developers.

You can find Melissa on Twitter at @melissajmckay.

5:30-5:45: Announcements

5:45-7:15: Reactive Domain-Driven Design Made Explicit

There is a better way forward than most developers have been taught by reading blog-driven example code. Those examples are often watered-down, how-to pitches on using some technical mechanism, but in their brevity provide some of the worst software design examples going. Even so, those examples are copied and embedded in the code that soon becomes a Big Ball of Mud. Since my “red book” was published, with the title Implementing Domain-Driven Design,” DDD has gained global popularity. That’s great and all, and certainly one of my authoring goals. Yet, with motivations in expediency, the vast majority of those who claim to use DDD have latched on to some of its tactical tools and called it good. And truly, it is not good. Certainly DDD is a “better way forward,” but only if applied with strategic thinking and engagement with business experts that leads to software innovation. It’s generally the technical patterns, such as CQRS and Event Sourcing, that attract developers. While very useful, such patterns are orthogonal to DDD, not the embodiment of it. In this 90-minute talk, full of live diagramming and expert advice, learn the essence of DDD and how to leverage the open source, purpose-build platform SDK that channels developers along the correct domain-driven path. This is uniformly achieved by enabling fluency of expression in rapidly-built Bounded Contexts and their supporting domain models that reflect accurate Ubiquitous Languages, all packaged into an instantly deployable Reactive, Event-Driven, fully-integrated, Microservices architecture. As a bonus, you’ll gain a vital understanding of how to maintain broadly distributed Domain Events and other elements for type- and version-safe information exchange. Success, win, success, win.

About Vaughn Vernon

Vaughn Vernon is the founder and chief architect of VLINGO XOOM, the OSS rapid development platform SDK supporting DOMA- and DDD-friendly Reactive, Event-Driven, and Microservices Architectures. A software developer and architect with more than 35 years of experience in a broad range of business domains, Vaughn is a leading expert in Domain-Driven Design (DDD) and champion of simplicity and reactive systems. Vaughn is the author of four books, including Implementing Domain-Driven Design, Domain-Driven Design Distilled, and Reactive Messaging Patterns with the Actor Model, all published by Pearson-Addison-Wesley. Most recently Pearson/Addison-Wesley has commissioned him for the Vaughn Vernon Signature Series, within which his fourth book Strategic Monoliths and Microservices— Driving Innovation Using Purposeful Architecture is published.

You can find Vaughn on Twitter at @VaughnVernon.

7:15-7:30: Q & A

The live streaming of this meetup is sponsored by Okta.