My little son Orlando is now at the age of close to a year walking on his own without any help from us and also without holding a chair or other helpers.
I am very proud :-)
Sunday, October 17, 2004
Wednesday, October 13, 2004
Eclipse plugin horror
I am currently working with webservices. Bruce Scharlau has a nice picture of a graph how the various elements in a .wsdl file are linked together. This picture is generated by a plugin contributed by IBM. The eclipse page also has a download link to it.
Now I am downloading this 55MB zip file, then some EMF stuff and and and.. Sometimes data is flowing in at incredible speeds ro 3kBytes/sec (over DSL!). Then some parts of the download are missing and the update has to start again .. In the end, this sort of action takes ages *sigh*
I really like Eclipse, but this is nightmarish.
And the worst: the feature to generate the diagram is not even available due to some error or incompatibility or missing whatever.
Now I am downloading this 55MB zip file, then some EMF stuff and and and.. Sometimes data is flowing in at incredible speeds ro 3kBytes/sec (over DSL!). Then some parts of the download are missing and the update has to start again .. In the end, this sort of action takes ages *sigh*
I really like Eclipse, but this is nightmarish.
And the worst: the feature to generate the diagram is not even available due to some error or incompatibility or missing whatever.
Monday, October 04, 2004
BlogThis for FireFox PR available
Under Mozilla Update :: Extensions -- More Info: BlogThis, the BlogThis context menu extension is finally available again for Firefox.
This tool works like the BlogThis! button in the Google Toolbar for IE.
This tool works like the BlogThis! button in the Google Toolbar for IE.
Tuesday, September 28, 2004
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?
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?
Saturday, September 25, 2004
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...
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.
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 % |
Tuesday, September 21, 2004
SVG: Tree drawing
Monday, September 20, 2004
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 :-)
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 :-)
Monday, September 06, 2004
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)
Wednesday, September 01, 2004
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.
I am
Which OS are You?
Not bad .. I feared to be some Win*. Try it, it is worth a laugh.
Tuesday, August 31, 2004
SVG: Batik and <tspan>
Currently I need many drawings in PDF to be able to include them in documents produced by PDFLaTeX. With Batik, there is a tool to convert SVG to PDF.
The Idea to use SVG came as Together can write this as the only vector format. And when producing class diagrams etc. with Together, the PDF result is excellent. Unfortunately Together is no general purpose drawing tool.
After some investigation I found Sodipodi, which is a nice tool with some downsides. But ok, it can produce SVG. When doing some tests, the Fonts always looked ugly (the top line in this pdf). I did some testing around and found that Sodipodi does the following
After removing the <tspan> elements, the text can no longer be moved around in the Sodipodi canvas, but looks like it should (bottom line in this pdf).
As <tspan> is pretty valid in SVG, this seems to be a problem in Batik or FOP, which is used by Batik to produce PDF. Especially as the conversion to PNG works as it should.
The Idea to use SVG came as Together can write this as the only vector format. And when producing class diagrams etc. with Together, the PDF result is excellent. Unfortunately Together is no general purpose drawing tool.
After some investigation I found Sodipodi, which is a nice tool with some downsides. But ok, it can produce SVG. When doing some tests, the Fonts always looked ugly (the top line in this pdf). I did some testing around and found that Sodipodi does the following
<text ....>
<tspan>This is some text</tspan>
</text>
After removing the <tspan> elements, the text can no longer be moved around in the Sodipodi canvas, but looks like it should (bottom line in this pdf).
As <tspan> is pretty valid in SVG, this seems to be a problem in Batik or FOP, which is used by Batik to produce PDF. Especially as the conversion to PNG works as it should.
Saturday, August 28, 2004
The "I want it now" syndrome
Have you ever worked in an Open Source project?
Then you probably know the folks that report a bug with "ultra critical" and "I need it yesterday". The bug report sometimes says "xxx doesn't work". When you then ask what doesn't work -- silence. Nothing. Or even flaming that one could have answered earlier.
I understand, that not everybody is able to fix things themselves. And I also understand that if you use a tool that stops working, it is very important to get it fixed at that moment.
But most people that work on Open Souce earn their living by doing other things, perhaps even having a second job in the evening. So you cannot expect them sitting behind the trouble ticket system all day long just waiting for that very urgent problem coming in.
If a tool has such a big value for you and your production chain, then get a support contract upfront or try to pay someone to help you when the problem arises. Some call that risk-management.
Then you probably know the folks that report a bug with "ultra critical" and "I need it yesterday". The bug report sometimes says "xxx doesn't work". When you then ask what doesn't work -- silence. Nothing. Or even flaming that one could have answered earlier.
I understand, that not everybody is able to fix things themselves. And I also understand that if you use a tool that stops working, it is very important to get it fixed at that moment.
But most people that work on Open Souce earn their living by doing other things, perhaps even having a second job in the evening. So you cannot expect them sitting behind the trouble ticket system all day long just waiting for that very urgent problem coming in.
If a tool has such a big value for you and your production chain, then get a support contract upfront or try to pay someone to help you when the problem arises. Some call that risk-management.
Friday, August 27, 2004
Things the world doesn't need
Heise newsticker reports that Cherry now offers a Linux Keyboard (click here for a larger image)!
That keyboard has keys for page forward/backward, as if ALT-/ woudn't work. It also has cut / copy / paste keys.
Ok.. nice idea. But the bad think about all those keys is that they cannot be reached without moving the hand away from the ten-finger writing position.
But I am sure, it will be a success, as it has a penguin key.
P.S.: When do they offer keyboards with a BSD daemon or a steaming java cup printed on? :-)
That keyboard has keys for page forward/backward, as if ALT-
Ok.. nice idea. But the bad think about all those keys is that they cannot be reached without moving the hand away from the ten-finger writing position.
But I am sure, it will be a success, as it has a penguin key.
P.S.: When do they offer keyboards with a BSD daemon or a steaming java cup printed on? :-)
Friday, August 20, 2004
Maven woes again
As Xdoclet uses Maven to produce the final documentation and web site, I thought I could enable the maven-statcvs-plugin to get to fancy line of code charts.
But instead:
When looking at the documentation, I found out, that this plugin uses a cvs command found on the host, while the maven-changelog-plugin uses a built-in cvs client.
This explains why maven takes that much space *sigh*.
Even worse: both plugins get the change log from the cvs server. Instead of fetching it one time only and then processing it twice, the load on the server is doubled!
But instead:
[java] StatCvs-XML - CVS statistics generation
[java]
[java] java.lang.NullPointerException
[java] at net.sf.statcvs.Main.getModuleName(Main.java:193)
When looking at the documentation, I found out, that this plugin uses a cvs command found on the host, while the maven-changelog-plugin uses a built-in cvs client.
This explains why maven takes that much space *sigh*.
Even worse: both plugins get the change log from the cvs server. Instead of fetching it one time only and then processing it twice, the load on the server is doubled!
Friday, August 13, 2004
Java code analysis tools
Today I stumbled over some stupid errors and thought "why doesn't eclipse tell me about that?" so I remembered Findbugs and was first looking for a findbugs output xml to html stylesheet (there is one posted in the forum at sf.net). I also saw that there is an eclipse plugin. So I was trying to get findbugs with its plugin to work together with Eclipse 3.0, but did not have success because I misunderstood part of the the documentation.
While googling for help, I came across PMD and thought to give it a try.
The plugin works nicely and is easy to set up and run.
But after running it over my source file, I was disappointed, because it mostly was a different incarnation of checkstyle. It was telling me that some variable names were too short, others too long bla bla bla.
But it did not find the real problem of the following code snippet:
PMD complains that o1 and o2 are too short that is all, but does not detect the NPE when o1 and o2 are both null.
Ok, this might be too tricky. Lets try something simpler:
Even here, PMD only complains about the short variable name, but doesn't find the NPE.
I am sure, that a tool like PMD can help a lot in improving code quality, but is basically useless for bug hunting.
And for my need to convert the findbugs output into a html page, I wrote an extremly simple xslt stylesheet.
While googling for help, I came across PMD and thought to give it a try.
The plugin works nicely and is easy to set up and run.
But after running it over my source file, I was disappointed, because it mostly was a different incarnation of checkstyle. It was telling me that some variable names were too short, others too long bla bla bla.
But it did not find the real problem of the following code snippet:
Object o1 = getBla(..);
Object o2 = getBla(..);
if (o1==null && o2 !=null) {
// do something
}
else {
if (!o1.equals(o2)) // something else
}
PMD complains that o1 and o2 are too short that is all, but does not detect the NPE when o1 and o2 are both null.
Ok, this might be too tricky. Lets try something simpler:
Object o = null;
System.out.println("below is a NPE");
o.equals(null);
Even here, PMD only complains about the short variable name, but doesn't find the NPE.
I am sure, that a tool like PMD can help a lot in improving code quality, but is basically useless for bug hunting.
And for my need to convert the findbugs output into a html page, I wrote an extremly simple xslt stylesheet.
Thursday, August 12, 2004
A-Team finally free of charges
reports here that the heroes of my youth, the A-Team is finally cleared of all charges by the US Military.
Enjoy the article :-)
Tuesday, August 10, 2004
Downside of ubiquitous reachability
We were having some strange problems with some framework. I got the number of an expert from "his" sales guy a few days ago and I was trying to reach the expert now. Around 3pm yesterday (German time) I dialed +49 171 ... (German mobile phone number). After a few beeps I heard the voice of that guy. I started ".. bla bla bla.." then I heard "you know .. it is 6am here where I am .. you just woke me up".
I felt somewhat guilty that I did phone him and that I did not directly hang up. On the other hand I was pissed, as I did phone during normal office hours (in Germany) and cant know the German numbers are redirected to the US (California probably). If that guy doesn't want to be woken up, then he should shut down his phone).
I felt somewhat guilty that I did phone him and that I did not directly hang up. On the other hand I was pissed, as I did phone during normal office hours (in Germany) and cant know the German numbers are redirected to the US (California probably). If that guy doesn't want to be woken up, then he should shut down his phone).
Friday, August 06, 2004
Bahncard - I am impressed
German Railways, Deutsche Bahn offers a reduction system, Bahncard, where you buy a voucher that gives you 50% reduction on the normal railways fee.
In the past, ordering a bahncard took a week or longer and they sent you a slip of paper as preliminary Bahncard until they were able to print the plastic card.
This time things were different: including the delivery of the Bahncard by German Post, it only took one and a half days from ordering the Bahncard at the web site until I had the card in my hands. I am really impressed and hope that other services of the Bahn will ameliorate as well.
In the past, ordering a bahncard took a week or longer and they sent you a slip of paper as preliminary Bahncard until they were able to print the plastic card.
This time things were different: including the delivery of the Bahncard by German Post, it only took one and a half days from ordering the Bahncard at the web site until I had the card in my hands. I am really impressed and hope that other services of the Bahn will ameliorate as well.
Tuesday, August 03, 2004
20 years Email in Germany
20 years ago, Germany got connected to the CSNet. This article shows the first email that reached Germany.
Why do I write this? Because the CS Department of U Karlsruhe later 'outsourced' this part into one of the first German Internet providers 'Xlink' that later became of the now bancrupt KPNQwest. I had the pleasure to follow parts of this live from '93 on @Xlink.
Why do I write this? Because the CS Department of U Karlsruhe later 'outsourced' this part into one of the first German Internet providers 'Xlink' that later became of the now bancrupt KPNQwest. I had the pleasure to follow parts of this live from '93 on @Xlink.
Sunday, August 01, 2004
A must have for Firefox
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