Xtext, Robots and Quirk Busters in San Francisco

Spring is around the corner and it is time for another EclipseCon NA.

This year I will be pretty busy: As some of my colleagues unfortunately cannot make it, I took over their sessions, resulting in one talk or tutorial per conference day. And as we decided to bring our XRobots game to our booth, that will likely keep me occupied for the rest of the conference. But I am really looking forward to it!

On Monday morning, Holger and me are giving a tutorial on Xtext for Beginners. Remember to bring your Laptop, as you are going to get your hands dirty implementing your first domain-specific language to create a Web-Application. Harbour A - Monday, 09:00 to 12:00.

On Tuesday, I am going to tell you why it is hard to integrate diagram editors with Xtext or an existing text-based IDE, and show how you can improve the user experience of a combined textual and graphical IDE. I will use FXDiagram, a framework that focuses on UX and keeping the developer in charge. It has made made great progress recently, so it is ready for adoption. Diagrams, Xtext and UX, Grand Peninsula EFG - Tuesday, 14:15 to 14:50



Wednesday is Xtext Day, an entire track exclusively on Xtext. I am going to substitute Moritz in the talk on Scoping, Linking and Indexing. From my experience, this is one of the first hurdles a language implementer has to take when using Xtext. Bayside AB - Wednesday, 15:00 to 15:35

XRobots is a robot sumo fight game. Players can challenge each other in writing the best script to push the opponent off the ring or tip him over. We are providing the game almost during the entire conference at our booth. All you need to participate is a web browser and some ambition to win :-) It has already been a huge success at EclipseCon Europe and Devoxx Belgium, so we hope the North Americans are as geek as the Europeans. If you want to know how we implemented it, you have to attend my session The Making of XRobots, Grand Peninsula EFG - Thursday, 14:30 to 15:05.

XRobots at EclipseCon Europe 2014

EclipseCon Europe 2014 was special to me: Miro, Holger and me had been preparing a robot game for our booth, and I was very curious whether it would work as expected and more than that whether people would like it. It turned out to be a blast: Some attendees even spent the after hours to work on their programs offline, and returned to our booth the next day to prove it. And even for those who didn't choose to compete, it was still a great show to watch.

The game works as follows: You write a script to control a robot in a wrestling fight. You win the game when your robot turns the opponent over or pushes it outside of the ring. Within the script, you can define how your robot should react on specific conditions, e.g. when it is close to the opponent. The robots can move, rotate, drive curves and lift up their scoop. You can read the own and the opponent’s position, view direction and speed.

The DSL is of course implemented with Xtext. You only need a web browser to join the game. We have enhanced Holger’s Xtext in the Web code to provide a web-editor with the usual Xtext goodies such as live validation, content assist, syntax highlighting, hovers etc. It worked really well and we plan to spend more time on Xtext in the web soon. As we have embedded the expression library Xbase, you can use all kind of expression and control structures.

To run your script you have enter a token which is shown on the game display at our booth. As soon as both robots are assigned, the scripts are executed by an interpreter on our game server, which makes two Lego Mindstorms robots engage in a fight.

The involved tools include Lejos, Xtend, Xtext with Xbase, Eclipse, Orion, Jetty, JavaFX and more. To locate the robots precisely enough we had to go for a video solution based on OpenCV. The Making-Of has been rather exciting, so we decided to file a talk on this for EclipseCon NA 2015. If you plan to attend and want to hear the story, vote for it!

The robots’ next gig will be at Devoxx in Antwerp next week. Of course we’ll bring them to  EclipseCon 2015 in San Francisco, too.

Apart from the robots, EclipseCon Europe 2014 was again gorgeous. The three sessions I gave went fine, I met a lot of really nice people and for the first time I had the time to watch the amazing Circus Eclipse. Thanks to the organizers and to the community to make EclipseCon such a great event.

PS: Our talk The Making of XRobots has been selected as one of three early birds for EclipseCon NA 2015! See you there!

Xtext, Xtend, JavaFX and Robots

It is autumn again and EclipseCon Europe 2014 is just around the corner. To me as an Eclipse committer from Germany ECE always feels a bit like meeting the family. In fact, I have been attending for seven years in a row now. I even remember the times when it was called Eclipse Summit Europe. Oh man, I am getting old…

As every year, my colleagues and me are contributing the program: I have counted 14 sessions by itemis and I am going to give three myself. Of course there is a lot about Xtext and Xtend, but also on other topics like Java performance or home automation. And itemis is sponsoring again.

For me it starts Tuesday morning: Sven and me are going to give a tutorial on Functional Programming With Xtend. Xtend — the JVM language developed at Eclipse — offers a great set of features to exploit the benefits of functional programming without the verbosity of Java. This session not only gives an introduction on functional programming in general but it is also a good opportunity to look beyond Duke’s nose. Bring your laptop, you are going to get your hands dirty!

No EclipseCon without me on graphical editing: In Diagrams, Xtext and UX I am going demonstrate how you can add diagrams to your textual Xtext languages without adding usability pains. I am going to use the JavaFX based framework FXDiagram which offers superior UI metaphors for the end users in combination with more freedom for the developer. Watch it in action on Tuesday afternoon.

On Wednesday, Holger and me are going to show you what’s New & Noteworthy in Xtext. We have recently finalized the Xbase API for DSLs with expressions, concurrency in the IDE has been reworked, we have parallelized the builder and much more. We plan to give a sneak preview of the IntelliJ support as well.

But the ultimate reason why you must attend EclipseCon Europe 2014 is going to be at our booth. Miro, Holger and me have created a new game for you using all the technologies above (and more). So be prepared to encounter these two guys.