Coming Up for Air

Merry Christmas, 2018

I hope you all have a merry Christmas. More importantly, I hope you take the time to think about the birth of the child that gives Christmas its meaning.

"The birth of Christ is the timeless event that leads us to believe that the cries of a broken world have actually been heard. A Savior has been born. The vault of Heaven truly has been opened" -- Author Unknown

A Possibly Silly Question about Java Visibility

This morning, I was asked a question by a coworker that we both thought we knew the answer to: if a method is protected, can other classes see that method? The answer surprised us: maybe. :) It’s a pretty simple, basic question, but I thought I’d mention it in case there’s a beginner wondering, or more senior developers, such as myself and my team mate, that just have it wrong. :)

Getting Started with Eclipse MicroProfile, Part 8: The Conclusion

Many times, one of the hardest parts of getting started with a particular piece of technology is figuring out how to get started. :) In this series, I’ve used an extremely simple project to show how to do just that with a number of MicroProfile implementations. Obviously, a real application will have many more concerns than we dealt with in this application, but what this effort gave us is working, runnable, and testable build for six different MicroProfile implementations. What I’d like to do in this final installment in the series, is give some closing thoughts.

Getting Started with Eclipse MicroProfile, Part 6: Hammock

This time around, we’re going to start looking at a slightly different take on MicroProfile implemenations. Whereas Payara Micro, Thorntail, OpenLibery, and TomEE are all based on application servers (albeit stripped down versions), our implementation in this post, Hammock, is based on a CDI container. Rather than start what amounts to an app server under which a web is deployed, we’ll be spinning up a plain ol' CDI container, which will look for CDI beans to load/start/etc. That may sound weird, and I may not be describing it clearly, so let’s just jump in to the code and take a look.

Getting Started with Eclipse MicroProfile, Part 5: TomEE

In this installment of our series, we’re going to take a look at the last of what I think of as the more traditional, app-server-based/-spawned implementations, TomEE. TomEE is a fully Java EE-enabled distribution of the venerable workhorse Tomcat, and comes with support for creating MicroProfile applications, so let’s see what that looks like.

Getting Started with Eclipse MicroProfile, Part 3: Thorntail

In the last installment, we talked about Payara Micro. In this, we’re going to look at Thorntail. Thorntail, née Wildfly Swarm, is based on Wildfly from Red Hat and is said to be "just enough app-server". Much like Payara Micro, Thorntail exposes a battle-tested application server platform, stripped down for microservices usage. Let’s a take a look at what it takes to deploy our application on Thorntail.

Getting Started with Eclipse MicroProfile, Part 1: the Application

To start our investigation, we need an application to work with. Part of the problem with getting started applications is making sure that your example is complicated enough to be interesting, but not so complicated that the greater message is lost in the details of the app. MicroProfile 2.0 is made up of a number of components:

  • MicroProfile Config 1.3

  • MicroProfile Fault Tolerance 1.1

  • MicroProfile Health Check 1.0

  • MicroProfile JWT Authentication 1.1

  • MicroProfile Metrics 1.1

  • MicroProfile OpenAPI 1.0

  • MicroProfile OpenTracing 1.1

  • MicroProfile Rest Client 1.1

  • CDI 2.0

  • Common Annotations 1.3

  • JAX-RS 2.1

  • JSON-B 1.0

  • JSON-P 1.1

To include all of those in this would probably be a bit too much technical weight for a getting started effort, so, for this example, I’ve leaned (probably too far) toward simple. Our application will have a single JAX-RS resource, into which is injected a single CDI bean. The point is to have a working REST endpoint, with an inject "service layer", to show a MicroProfile in action, allowing us to verify that our basic environment is configured and working correctly. From there you are free to load on all the complexity you find you need. That’s exactly what I’ll be doing in a separate project. :)

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