So, my day didn’t start out with the Oracle general session, which I’m quite happy with in retrospect. Instead the first talk I saw was “Quick and Easy Profiling with Integrated Tools”, about NetBeans profiling support. Very useful stuff, actually, and 6.0 can do some amazing things.

After that, it was time for a packed Josh Bloch’s Effect Java Reloaded, except it wasn’t really reloaded that much yet. I was a little bit disappointed, since most of the stuff was the same as last year. Some parts about the Builder pattern, much info about do’s and don’ts with generics (much of it having to do with type parameters and wildcards). The TypeRef pattern was interesting, but not something I will find very much use of, I think.

After lunch a went to a presentation which I really thought would give me something. “Ruby on Rails Meets the World of Enterprise Applications”. Now, I really hoped this would include some information on the Enterprise problem with regard to Rails. I was very disappointed. The talk was basically about a 3-week application written in Rails that connected to SAP. So the enterprise in question was there because of SAP. That said, the presenter was good, it was just not the subject I had wished for. And by the way, what does this presentation do on JavaOne?

After that, I spent some time looking at Mingle issues with Jon. I decided to go to the upper Haights’ area to shop, and then get back to my hotel room for some programming. As it turned out, I really didn’t go to any more sessions yesterday. After programming, I went to a Swedish Java User Group meeting here (and what a turnout! it seems like there’s over 200 Swedes at JavaOne this year.)

The plan was to get back to the BOF’s after that point; there was especially one I really didn’t want to miss (the Dynamic Languages BOF with Frank Cohen). But, I happened to get invited to the Google party, so I spent the rest of the evening there, meeting lots of interesting people. It was great fun.

And now I’m about to go in and see Charles and Tom do the JRuby on Rails presentation. More information later.

No Comments | By Ola Bini | In: Uncategorized | tags: javaone, jruby. | #

So, as you know, RedMonk arranged an unconference at JavaOne/CommunityOne this year. I couldn’t attend all sessions, but among the ones done were one about dynamic languages, and we got some really good discussions going. We haven’t really finished those discussions yet, though, and it seems we will take it onto a mailing list, but it was a very good environment to start out.

I really hope RedMonk will be able to do this next year too. More info about it can be found here: http://redmonk.com/wiki/index.php/RedMonkUnconference.

1 Comment | By Ola Bini | In: Uncategorized | tags: javaone, redmonk. | #

I am sitting in the alumni lounge, waiting for the sessions of day 2 to begin. I was thinking about attending the Oracle General Session, but decided to take it easy for a while instead.

So, where were I yesterday? Well, the Technical General Session was really interesting. As I mentioned yesterday, Charles and Tor did a great demonstration that was very well received. We also got some more on the technical side of JavaFX. Very nice.

After that, I attended Web Algorithms. It was a very accomplished presentation, detailing a few important things you can use to make life in computing easier, beginning with swap-XOR and credit card validation, going through public key cryptography and looking at Google MapReduce. It was a good presentation, but nothing new in it for me though, which was sort of sad.

The next presentation I went to was about the next generation of Web support in Java. The Servlet 3.0 specification and so on. The presentation was quite vague and didn’t say much new things, really. Ok, so next generation servlets will use annotations, and there will be support for Rest style things and better security and more non-idiotic defaults? Not surprising.

After that presentation I was feeling really tired, so I went back to my hotel and tried to rest some. That didn’t go so well so I finished writing chapter 11 instead. Then it was back to Moscone center to see a BOF on web development in Java EE compared to Ruby on Rails, with tool support. This talk was quite disappointing; it wasn’t that well executed, and it was very un-nuanced in detailing the good and bad parts of Ruby on Rails. It seems that when people do these comparisons they just talk about how easy it is to do CRUD-style applications, but seems to forget that Ruby on Rails can do harder things (http://studios.thoughtworks.com/) and that the benefits from the Ruby language in development productivity scales. If you compare doing a small-sized web app in Java and Rails to each other, you will get some kind of percentage. But if you do a comparison between a medium-sized app in Java and Rails, that percentage will be greater, since the Ruby languages scales development time in a totally different way from Java. Not to mention maintainability after the fact.

Last I went to Neal Gafters BOF on Closures in Java. I really like the way Neal does presentations, but we couldn’t really get into the meat of stuff, since half the people on the BOF didn’t know closures from their elbows. So most of the presentation was spent rehashing what they are and why they’re needed in Java.

After that, I was beat. And now it’s a new day, started with breakfast meeting with Roy Singham. Very interesting and entertaining. I’m more and more convinced that I’m going to love working for ThoughtWorks.

1 Comment | By Ola Bini | In: Uncategorized | tags: javaone. | #

Charles O Nutter and Tor Norbye just got on stage here, and showed of deploying Mephisto as a WAR-file, and then changing it to add text-to-speech functionality, with a Java library that generates an audio file. The total code they wrote on stage was about 10 lines of Ruby… The power of Java and Ruby together: it’s beautiful.

I already knew what they would do, having helped fix many of the issues getting in the way for Mephisto, but it’s still incredibly cool. Charles and Tor got several impromptu applauds from the audience too, so I’m pretty sure people think it’s neat.

Right now, I’m starting to get curious why people continue to use the term “scripting language”. It doesn’t seem to fit either Ruby nor Groovy anymore. Oh well. Nitpicking.

Next up is Arun Gupta. He’s talking about jMaki and Phobos, both very nice usages of JavaScript and other languages.

4 Comments | By Ola Bini | In: Uncategorized | tags: javaone, jruby. | #

I’m sitting in the general session hall, waiting for the first technical general session to begin. Yesterday was CommunityOne, where we had some interesting discussion about dynamic languages within the context of the RedMonk Unconference. Aside from that, the best parts of the day way announcing that Mingle runs on JRuby, and meeting up with all my soon-to-be fellow ThoughtWorkers. They’re a great bunch of people, and we had good fun.

Today was the opening general session, where Rich Green announced some very interesting developments. Among these are the fact that the open sourcing of Java is now complete, that Sun is coopering quite heavily with UN to provide resources for education to areas of the world where this have long been a huge problem. But the most important announcements were about something called JavaFX. I can’t really say I understand it completely yet, but it seems to be an effort to tackle Microsoft Silverlight, and also fix several deficiencies in Swing by providing JavaFX Script (which looks very much like F3. I’m not sure if it actually is F3 or something else.). This obviously begs the question why Sun finds it prudent to invent a new language, instead of using one of the many great efforts existing in the dynamic language communities for this problem. For example, both Groovy, Jython and JRuby have different versions of SwingBuilders, which allow you to rapidly create Swing interfaces with a specialized DSL for this.

Except for that, the general session and keynote was more or less like usual. Very flash, very markety, but still more technical than I imagine other conferences are. And it was fun to see Rich Green being compared to Steve Jobs…

The first technical session I went to was called “Cool Things You Can Do with the Groovy Dynamic Language”, and was presented by Guillaume Laforge and Dierk König. It was a quite good session, but I can’t get away from my general opinions about the Groovy language. So, before I say something about the presentation, I need to describe my feelings for Groovy. Remember, these are my personal opinions, and some are definitely based on feeling without any specific rationalization.

I would really like to like Groovy, but I can’t. I’ve really tried, but I can’t find the Groovy language to my liking. And believe me, for some circumstances, Groovy should be able to fill the gap between Ruby and Java better than JRuby, at least in some cases. The Java integration in JRuby is quite hard, dispatch and overloading makes calling Java code complicated (from an implementation point, not for the user). All of this would be much simpler with the Groovy approach. But no, I still can’t get along with Groovy. The main reason, I believe, is the feeling I get from all code that the language Groovy have grown piecemal, adding stuff that’s neat wherever. I’m not sure this is the actual way Groovy was designed, but it feels like a modern version of Perl. The syntax doesn’t mesh, and there are numerous (small, but nonetheless there) inconsistencies in how things are handled; many of the things that the language provide for you is things that really shouldn’t be part of the language, but part of a library instead.

So, from this point of view, the presentation walked through several new features of Groovy, and lots of things you can do with it. They talked a bit about the new support for annotations and the plans for generics. Some of it was quite cool; I like the builders (but I prefer Markaby to the XMLBuilder), and some of the features are quite handy. But looking back at my earlier feelings I still see a design process more focused on finding problems with Java, and duct taping them with Groovy. (Like this: in Groovy, all exceptions get handled automatically, making it look as if all exceptions are unchecked.) I have no problem with many of these features, but I don’t think it’s a good way to create a general purpose language.

I’ll be back later with more info on the rest of the days sessions.

5 Comments | By Ola Bini | In: Uncategorized | tags: groovy, javaone, jruby. | #

Tomorrow morning I’ll leave Stockholm for San Francisco. I’ll be arriving 5:ish PM at SFO and will stay at the Handlery Union Square Hotel. I will not present at either JavaOne or RailsConf, though, so I will have a fair amount of time for fun stuff. I will attend the RedMonk unconference at CommunityOne, participate in the DynLang event, and then attend regular JavaOne. If you see me (I’ll be wearing my black hat…), please say hi!

Next Saturday me and my coworkers will move out of SF and take a car to Portland, where we plan to arrive on the following Tuesday or Wednesday, just in time for RailsConf. We leave from Portland early Monday after the conference.

Hope to see many of you there! It will be exciting, that’s for sure. I will also try to report as much as possible from all events.

No Comments | By Ola Bini | In: Uncategorized | tags: javaone, jruby, railsconf. | #

The call for papers went out two days ago, and we already have several good proposals in line that will be submitted to JavaOne. Hopefully we will get many interesting talks this year. As far as I know, there are at least 5 JRuby-specific proposals submitted, and there will hopefully be more.

I am sending in two different proposals this year, one about JRubyEE (it’s called “Agile Enterprise Development with JRuby”). That will be interesting to do and I really believe there is much for Java enterprise development to use in JRuby.

The second proposal is for a BOF about several JVM languages called “Lambda on the JVM: JRuby, Jython and Lisp”. I’ll talk about how to utilize different JVM alternative languages to do interesting and useful things. Since this is my venue, I will specialize on languages that are derived from Lisp (implicitly or explicitly). (I include both Ruby and Python in this category).

Hopefully at least one of the proposals will get through.

1 Comment | By Ola Bini | In: Uncategorized | tags: javaone, jruby, presentation. | #