By fkieviet on May 15, 2007
All of last week I was at JavaOne. It was an exhausting but very
interesting week. Like last year, there were many interesting sessions,
too many to list them here. Let me just mention the one I enjoyed most
was the one by Neal Gafter on Closures
for the Java Programming Language (BOF-2358). I can't wait until
they're in the Java language!
Not only did I attend sessions and BOFs, I also presented BOFs. Three of them to be
precise. I recorded the audio on my MP3 player. Unfortunately the
quality of the audio is pretty bad. I'm posting the audio recordings
below. I'm also posting the slides. Here they are:
BOF8847: Developing Components for Java Business Integration: Binding Components and Service Engines
Presented by Frank Kieviet, Alex Fung, Sherry Weng, and Srinivasan
Attendance: about 100
You cannot cover how to write JBI components in just 45 minutes. We
were also not sure about what the audience was interested in. That's
why we assumed that the audience would consist mostly of people who
have never written a JBI component before, and are relatively new to
JBI. That's why we decided to talk mostly about general information on
JBI and JBI components, and highlight the power of JBI and discuss how
to go about developing one.
As an experiment I wanted to try a new format (at least new for me):
rather than slicing up the session into four parts of 10 minutes, we
cast the session into a "discussion forum". Of course the questions and
answers (and even the jokes) were well rehearsed.
Unfortunately, the audio/visual people that control the meeting
rooms, had forgotten to start the session timer. As a result the audio
was cut unexpectedly just a minute before we could finish up.
Nevertheless, I think it was an interesting session.
BOF8745: Leveraging Java EE in JBI and vice versa
Presented by Frank Kieviet and Bhavanishankara Sapaliga
Attendance: about 60
This BOF was originally to be presented by Vikas Awasthi and
Bhavanishankara Sapaliga, but Vikas couldn't make it, so I replaced
him. We focused the session on how JBI and EE can play together, trying
to make it interesting for both JBI application developers as well as
for EE developers. At the end I ran a demo with NetBeans showing three
different scenarios. The demo-gods were with me: the demo went very
smoothly. Unfortunately I forgot to demo how to add an EJB to a
composite application. Another valuable lesson learned.
BOF9982: The java.lang.OutOfMemoryError: PermGen Space error
Presented by Edward Chou and Frank Kieviet
Attendance: about 116
This session was on Thursday night at 10pm. That night was the
JavaOne After dark bash. Free beers, music and snacks for everyone.
Therefore we didn't expect much of an attendance: memory leaks are a
rather dry subject, and why leave the party early to go to this
session? Also, some of our thunder had been stolen by SAP who demo-ed a
tool to track memory leaks in a morning-session earlier that week. So
we were quite surprised when about 116 people turned up for our
session. Most stayed until the very end, and there were also quite a
few interesting questions. Apparently a lot of people struggle with
memory leaks in permgen space -- in my presentation I mention that I
get about a hundred hits on my blog every
day from people who search for this memory exception in Google.