NewInstance

Last time I used .ear packaging there was no support for sharing information between web applications: you needed to use web services, rest, etc. This evening I just made a search on the internet to check if things are better now. It seems that nothing is changed.
I found that some application servers have implemented proprietary [...]

Apparently, with JDK 7 we will have Strings in switch statements. I got a SCPJ certification long time back, but if someone asks me to write a switch statement in a job interview today, I could probably fail: I begun writing Java code in 2000, and I bet I used switch statement six or seven [...]

Registration/Login is the #1 usability problem on websites.
I hate security paranoia when it is not needed (ok, I can understand a bank…)
My suggestions to avoid boring the people using our software:

Let the user choose the preferred password. Don’t assign it your own (especially with random chars!!!). User will forget it and abandon the damn […]

Yesterday we had a business meeting in London. We flew there and we had the chance to walk through the city and enjoy the nightlife. In my previous visits to London I never appreciated the city very much: too noisy, to rainy, too expensive, too much people wearing formal. Sometime you can feel like being […]

Today I found a cute code snippet on Alex’s Blog and Euxx:
1public class Weird {
2
3 public static void main(String[] args) {
4 throw null;
5 }
6
7}

It compiles and trows a NullPointerException:

Exception in thread “main” java.lang.NullPointerException
at Weird.main(Weird.java:4)

I think that it is strange that […]

Forcing fsck on next reboot

$ sudo touch /forcefsck
$ sudo reboot

Merging PDFs

$ sudo apt-get install pdftk
$ pdftk file1.pdf file2.pdf file3.pdf file4.pdf cat output merge.pdf

Formatting USB disks/memories

mkfs -t vfat -V -I -c /dev/sdb -n LABEL
eject /dev/sdb

Fixing Oracle Repository GPG/PGP Key Error
The error (in Synaptic or during “apt-get update”):

W: GPG error: http://oss.oracle.com unstable Release: The following signatures […]

I bought a Sony PSP during last winter, and I am very happy of that. The videgames are amazing, I didn’t imagine that there were games so impressive on a so little machine. In particular I appreciated Ridge Racer, Final Fantasy the war of the Lions, God of War: Chains of Olympus, and many more.
Recently […]

It's sometime useful to access the version information from inside the program, for example to show that to the user, to manage upgrades or to identify the running version when a user reports a bug, etc. When you build using maven, inside your artifacts it is included the pom file and the a property file [...]

If you ever had the need to trace HTTP requests (and if you ever did advanced web development you did!), you probably found invaluable tools like TCPTrace for Windows.
On Linux I found a good replacement:

Download apache axis: axis-bin-1_4.tar.gz
Install it where you prefer.
Create a script to launch tcpmon

#! /bin/sh
export JAVA_HOME=/usr/lib/jvm/java-6-sun
$JAVA_HOME/bin/java -cp ~/tools/axis-1_4/lib/axis.jar org.apache.axis.utils.tcpmon

It’s also possible […]

The error:
Selecting from Eclipse, Preferences>Team>SVN and select SVN interface: JavaHL(JNI) on Linux you get:

Failed to load JavaHL Library.
These are errors that were encountered:
no libsvnjavahl-1 in java.library.path
no svnjavahl-1 in java.library.path
no svnjavahl in java.library.path
java.library.path = /usr/lib/jvm/java-6-sun-1.6.0.03/jre/lib/i368/client::/usr/lib/jvm/java-6-sun-1.6.0.03/jre/lib/i386::/usr/lib/xulrunner-addons:/usr/lib/xulrunner/addons:/usr/java/packages/lib/i386:/lib:/usr/lib

The solution:
install Java bindings for Subversion libraries:
$ sudo apt-get install libsvn-java
This will install required JNI libraries on /usr/lib/jni.
Then, add this path […]