Category Archives: Conferences

[2020 dev nexus] keynote – dueling banjos

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Burr Sutter (RedHat) and Ray Tsang (Google)

Freddy and Nancy played guitar/banjo to start

For more, see table of contents

Live demos

  • Ray
    • demo Kubernettes on Google Cloud
    • spring boot
    • jib-maven-plugin (use container registry instead of dockerfile)
  • Burr
    • demo OpenShift (Kubernettes implementation) running on Amazon, Azure and Google
    • quarkus
    • graalvm
  • deployed each other’s containers into the other one’s cluster
  • showed traffic redirection between cloud providers fronted both with a load balancer
  • audience load balancer – Can play at kubejava.com during the demo. Stopped it from the back end; good way to get everyone to pay attention again
  • move between clouds. took amazon instance down. showed auto failover to one of the others when unpaused

My take

Fun start to the day. We had music (banjos), a golden switch, a game and a high energy cloud presentation. Well, Or maybe it was two presentations concurrently.. 

2020 dev nexus – table of contents

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About the conference

  • 2400 attendees
  • celebrating 25 years of Java
  • This year, another conference NGAlt (angular conference) was run partially concurrently I got three attendees from that conference at my workshop yesterday. 
  • Duke! Oracle shipped the Duke costume. Duke was on stage during the opening remarks.

Wednesday

Thursday

Friday

[2019 oracle code one] cloud native

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A Cloud-Native Dev is Eating my Cheese! (How to get it back?)

Speakers: Eder Ignatowic & Alex Porcelli

For more blog posts, see The Oracle Code One table of contents

Requirements for Cloud Native

  • Microservices scenarios
  • Java tools and frameworks not optimized for cold starts and low memory consumptions

Problems now

  • We pre-fetch a lot in memory
  • New developers perspective
  • Java developers need a lot of RAM on laptop

History

  • 199x – early adopters – Java cool, big/reliable servers, app servers, app always up, JVM optimized for the long run
  • 200x – majority, cloud computing, commodity hardware. expect failure
  • 201x – late majority

Cloud generations

  • 199x – Virtualization – hypervisor, app servers as best practice (JavaEE). Tomcat/Jetty as outliers
  • 200x – Containers – Microservices, Docker, SpringBoot, go/node as outliners
  • 201x – Orchestration – Microservices maturity, Kubernetes, Go/node skyrocketing, Operator/Service Mesh as outliner.

Advantages of Java

  • Microprofile standard
  • Lots of libraries
  • Tons of developers
  • IDE/Tooling

Quarkus

  • Java EE standards + NodeJS Dev experience (no restart)
  • Size of a Go binary
  • Can use GraalVM

Kogito

  • Build automation tool
  • Based on Drools
  • jBPM

Demo

  • Used VS Code
  • Showed Kognito business rule – uses custom DSL

My take

It was fine, but not what I expected. My brain was full before I walked in so seeing a demo was hard. I’d seen a Quarkus demo recently. It’s still cool. (I left early and missed the end)