We’ve all come across many buzz words, new hyped techniques, and “The next big thingâ€? in our reading. For the last few years I 've been seeing a lot about CQRS, Domain Driven Development, and Event Sourcing and thought it was time to find out what all the hype was about. In this talk we will discuss the Pattern of event sourcing and CQRS and what some of the advantages/disadvantages are when implementing this pattern. We will also do a high level code walk through using Java with the Axon Framework to implement this pattern in a microservice. Speaker Bio Justin Strittmatter, Senior Software Engineer, MBO Partners We thank Techlahoma for generously providing the materials for the meeting, including the projector, pizza, chairs and to ProtoTekOKC for providing the cool environment. We are meeting at Techlohoma again this month as the new location does not have A/C yet. Stay tuned for details on the new location.

Due to a lack of speaker this month, the July 12, 2016 meeting has been cancelled. Please check back for information about our August 9, 2016 meeting.

It’s hard to ignore the growing number of Functional Programming languages. Haskell, Scala, Clojure, F#, Erlang, R, and many more. But what is Functional Programming and why should you care? This talk sets out to demystify FP, debunk common misconceptions, and highlight ways FP can solve certain problems. Stuck with Java or C#. No worries! Functional programming doesn’t require a purely functional programming language. It’s a different way of building. Let’s get functional! Speaker Bio Jordan Parmer, Software Engineer, Oseberg We thank Techlahoma for generously providing the materials for the meeting, including the projector, pizza, and chairs.

When it comes to the JVM these days, there are enough language choices to choke a horse. The good folks at Jetbrains, though, felt there was room for another and gave the world Kotlin. While it may seem like a new language (it hit 1.0 only this year), Kotlin has actually been in development for several years and is already in production in some significant applications. In this session, you’ll get a gentle introduction to this newish language, taking a whirlwind tour of all the great features in Java’s newest competitor. We’ll have slides! We’ll have source code! We’ll probably even have some weak attempts at humor, and when we’re done, you should know enough to get you started with this great language. Unless you left early. Speaker Bio Jason Lee, Sr. Principal Software Engineer, NetSuite, Inc. We thank Techlahoma for generously providing the materials for the meeting, including the projector, pizza, and chairs.

Most Java developers have heard of Scala and many have even tried it out. In this talk we will be doing a high-level discussion of the features that are unique to Scala and what make it a powerful language for consideration above Java and other JVM languages. Speaker Bio Matt Hicks

Continuous delivery is a central theme in the DevOps movement, and certainly a central component of the culture. It is the set of engineering techniques, practices, processes, and tools for releasing changes to software services frequently and reliably.# We 'll review the concepts involved in CD, take a look a working CD pipeline for an example application, and discuss how this could apply to other projects. Speaker Bio Ryan Hoegg Pizza, Chairs, etc. We thank Techlahoma for generously providing the materials for the meeting, including the projector, pizza, and chairs.

Speaker Bio: Jeremy Green Pizza, Chairs, etc. We thank Techlahoma for generously providing the materials for the meeting, including the projector, pizza, and chairs.

This is an updated version of a legacy refactoring demonstration. We 'll have a look at some code that is a mess (what code isn 't) and then work through the code using two different approaches. One, using JMockIt - a power mocking tool, the second, plain vanilla legacy refactoring. We 'll compare and contrast the differences and then see how well the power mocking tool holds after the plain old legacy refactoring approach. We 'll touch on some of the important things to keep in mind when working with legacy code and, more importantly, the smallest unit of reasonable legacy refactoring. Speaker Bio: Brett Schuchert Pizza, Chairs, etc. We thank Techlahoma for generously providing the materials for the meeting, including the projector, pizza, and chairs.

Property based testing is a method for generating large numbers of random values to test the property, or characteristics, of a class. Jeff will show how to use this to your advantage in test-first development. Speaker Bio Jeff Bowman Christmas Party We will have our annual JUG Christmas Party. Presents have been provided by the JUG and Hoegg Consulting. We may play a quick game of Dirty Santa, or we may just do giveaways. You will just have to come to find out which. Pizza, Chairs, etc. We thank Techlahoma for generously providing the materials for the meeting, including the projector, pizza, and chairs.

Producing good software is a goal many of us strive for by honing our skills at design principles, language mastery, architecture, methodologies, and expert use of libraries, frameworks, and platforms. Satisfied with our code, we then figure out how to deploy it, or we hand it over to an operations team who handles running it in production. Running software in production is the whole point! We can apply a lot of our skills and practices from software development to its deployment, and to the infrastructure on which it runs. Docker is "an open platform for distributed applications for developers and sysadmins" that provides a standardized way to package applications with the specification of their environment. This means everything from the operating system to the application server is specified in code, and will be identical between your environments. Speaker Bio Kenyatta Clark Pizza, Chairs, etc. We thank Techlahoma for generously providing the materials for the meeting, including the projector, pizza, and chairs.