A good move from Sun

Linda de Michiel and Craig Russel, spec leads for JSR-220 (EJB 3) and JSR-243 (JDO 2.0) have written an open letter to the Java community that they want to unite Java persistence under the umbrella of JSR-220.

The critics will now mumble that JBoss will get (more) influence on the whole Java persistence through their jsr members and through hibernate in special (Hani, I already hear you rotating in your bed).

I think this unification is a good thing, as persistence is critical to many applications and there is no point to have various competing standards that all fill a certain niche and where you can't really tell why you are using one standard and not the other.

Can you tell what is the difference between hibernate, jdo and entity beans? If so, do you know the differences between various jdo implementations? Do you know all the vendor specific details of EntityBeans configuration?

Ewww blogger...

For my previous post I tried to optimise the layout in a way that the tables are not miles away from each other, but no luck :-/
I have no clue what is going wrong, so I just have to accept it as is. Perhaps people are not supposed to blog tables or such...

Some statistics

I have a little web site that had some 2000 visits this month so far. I use awstats to track usage.
Below is an excerpt from some statistics.

Interesting fact: 70% of all users use a screen size of 1024x768 or less!
Also interesting: most browsers have Java and/or PDF support.

Operating Systems	Hits	Percent
Windows	10955	87.8 %
Unknown	562	4.5 %
Macintosh	459	3.6 %
Linux	398	3.1 %
Sun Solaris	89	0.7 %
FreeBSD	4	0 %
NetBSD	1	0 %
Symbian OS	1	0 %

Browsers	Grabber	Hits	Percent
MS Internet Explorer	No	8482	68 %
FireFox	No	2072	16.6 %
Mozilla	No	713	5.7 %
Unknown	?	369	2.9 %
Netscape	No	276	2.2 %
Opera	No	182	1.4 %
Konqueror	No	121	0.9 %
Safari	No	76	0.6 %
Links	No	72	0.5 %
WebCollage (PDA/Phone browser)	No	51	0.4 %
Others		55	0.4 %

Screen sizes	Percent
1024x768	63.3 %
1280x1024	14.6 %
800x600	9.3 %
1152x864	6 %
1400x1050	2 %
Others	4.6 %

Miscellaneous
Browsers with Java support	93.4 %
Browsers with Macromedia Director Support	39.2 %
Browsers with Flash Support	92.5 %
Browsers with Real audio playing support	37.8 %
Browsers with Quicktime audio playing support	39.5 %
Browsers with Windows Media audio playing support	89 %
Browsers with PDF support	84.9 %

SVG: Tree drawing

This article at xml.com describes how trees of data can be drawn in SVG with the help of an xslt stylesheet.
With some additional work, this could surely be converted into a nice DTD printer. A good article nevertheless.

JBoss 4.0 is out

After quite some development time, JBoss 4.0 has been released today.
Even as it was announced to be released rsn some days ago, I didn't believe it.
Now I bets will be accepted when the first patch release will follow :-)

My first time :-)


[echo] D:\devel\sim\server\build/webapp/classes
[javac] Compiling 2 source files to D:\devel\sim\server\build\webapp\classes

[javac] An exception has occurred in the compiler (1.4.2). Please file a bug
at the Java Developer Connection (http://java.sun.com/cgi-bin/bugreport.cgi) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
[javac] java.lang.ArrayIndexOutOfBoundsException: 1886419334
[javac] at com.sun.tools.javac.v8.code.ClassReader.nextInt(ClassReader.java:335)


I am OS X

Just made the "What OS are you" test on http://bbspot.com/News/2003/01/os_quiz.php.

I am

Which OS are You?

Not bad .. I feared to be some Win*. Try it, it is worth a laugh.