The Micronaut guides are really pretty good. So far, I’ve found just about everything I need. The biggest obstacle so far has been that, at times, the content was scattered across several guides and usually in the wrong language: I’m interested in Kotlin, but the guides seem to be mostly in Java or Groovy. This isn’t surprising, as budgets are limited, of course. What I would like to do here, then, is provide a small sample app, written in Kotlin, that demonstrates how to set up the project, configure and use JPA, and secure the app with JWT.
Recently, I’ve been experimenting with Micronaut, a new-ish "modern, JVM-based, full-stack framework for building modular, easily testable microservice and serverless applications" from the makers of Grail. So far, I’ve been really impressed. The documentation has been excellent, and the framework is very easy to get started with. I have, though, run in to some trouble writing tests, or, more accurately running tests. I spent far too much time trying to figure it out until I finally broke down and asked, and it turns out that it’s IDEA’s fault. While that’s a bit annoying, there is a workaround, which I’d like to document briefly here.
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.
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. :)
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.
Up next in our series comes an offering from, to me, a somewhat surprising source, Oracle, and that offering is Helidon. I first heard about in September 2018, and while it’s still pre-1.0, it looks extremely promising.
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.
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.
Having looked at Thorntail last time, we’ll take a look at OpenLiberty this time. OpenLiberty is the open source project under which, as I understand the state of things, IBM’s WebSphere Liberty is developed. In this installment, we’ll give its MicroProfile support a quick spin.
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.
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- Jason Lee in depth: Mojarra and Scales
- Jason Lee: Postmortem for JavaOne 2008
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- IEC donates custom JSF component to Mojarra Scales