Hassle with the new Eclipse LocationTech version of JTS (Java Topology Suite)

Jan 31, 2018

TouchKit is now 100% PWA — so what?

I had a discussion at work about PWAs and somehow got an inspiration to do some small enhancements to TouchKit for Vaadin 8. The 5.0.0 version is now available, and you can now easily build 100% PWA apps with it, but what really changed? Should you care?

Matti Tahvonen

Sep 20, 2017

Migrating Articles from Liferay to Medium

Importing existing posts to Medium isn’t easy. Medium supports importing blogs from Wordpress, but nothing more. As I don’t have thousands of entries, I could, of course, do it manually, but then all the posts would be dated for today. The service desk at…

Matti Tahvonen

Sep 13, 2017

Let’s try blogging on Medium

From time to time, I have been writing articles on my personal vaadin.com page. As we are now/soon renewing the website, I wont have that option anymore.

A lot of people have said good words about Medium, so I’ll try to make this my new forum for…

Matti Tahvonen

Apr 13, 2016

Vaadin with Ant, Struts and Spring MVC

I wanted to smoke test a recent JSP integration add-on we prepared for an upcoming webinar on JSP/JSF integration. Lately we also got complaints (for reason!) that we have removed our ANT example build script. We are clueless where the old example is lost and…

Matti Tahvonen

Feb 5, 2016

Having fun with HTML5 and Vaadin

I have been in a terrible flu for a week now. I hate not to be able to go out and enjoy the nice winter weather, but I have also had lots of time to spend with my computer, hacking with HTML5 features and Vaadin. Pretty fun actually. I wanted to try a slider (aka <input…

Matti Tahvonen

Feb 3, 2016

Making your Vaadin Add-on cope with dependency management systems

It is year 2016. Everybody expects Vaadin add-ons, and any other Java library, can be used by simply adding its dependency to the projects build file (Maven, IVY, Gradle) that is using it. Vaadin Directory provides…

Matti Tahvonen

Jul 12, 2015

Using Java 8 default methods to “fix” bloated interfaces

Vaadin and some other Java frameworks tend to have some rather “verbose” interfaces. For example Container and its sub interfaces has lots of methods that you actually don’t need to implement, except with a dummy implementation that…

Matti Tahvonen

Jun 6, 2015

Cross Field Validation in Vaadin

The core Vaadin infamously has no support for cross field validation. It is our second most voted feature among pro support users. The reason why it hasn’t been done is that it is really hard to implement perfectly in Vaadin, mostly for the reason that Vaadin contains “UI…

Matti Tahvonen

May 28, 2015

Using Webjars with Vaadin

Webjars are a handy way to consume various JS libraries in JVM applications. Maven will handle the dependencies and typically those are really easy serve from your web applications. With Servlet 3 containers you don’t even need a specific servlet for that, but typical Vaadin…