Archive for June, 2010

LXC 0.7 in Gentoo Linux – updated

LXC 0.7 is available as an upgrade in Gentoo Linux. After you get it you may have a surprise… no console output after lxc-start. It seems it is not a bug but a feature :) (as always with software). To get back the output just add -s lxc.console=$(tty) to the command line, like: # lxc-start [...]

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Posted in: Linux | June 25, 2010
| 5 Comments

Adding error messages in JSF

When developing applications with JSF, there is the need to display error messages back to the user, if a user submitted form contains errors, or if the processing of the data went wrong. For this request, JSF meets the <h:message/> tag.

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Posted in: Java, Web Development | June 22, 2010
| 2 Comments

osCommerce jQuery price calculator

Let’s assume that we have to build a price calculator for a osCommerce website, that needs to have price based on dimensions(input from user – length, width), attributes,
for each attribute there are more than 1 options with different prices for each option.

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Posted in: Javascrip/AJAX, PHP | June 21, 2010
| 4 Comments

Uncaught System Error:org/apache/jaxme/JMElement in JNLP

Wanting to implement a .jnlp jar for an application i run into this error that popped out in an error dialog “Uncaught System Error:org/apache/jaxme/JMElement” and after this, that project was blocked.

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Posted in: Java | June 11, 2010
| 4 Comments

SQL Transactions in Java

1. Rollback all data on import from a table if a row is corrupted.You have a list of sql queries as a parameter:

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Posted in: Java | June 11, 2010
| 4 Comments

LXC with Gentoo Linux

VMWare (Server, Player, ESX), VirtualBox, KVM/QEMU  are just a few of the virtualization technologies you can use if you need to run a generic virtual machine. Each has strong and weak points, each adds some overhead when running the virtual machine, each can prove useful in a given scenario. I’ve used more or less extensively [...]

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Posted in: Linux | June 3, 2010
| 8 Comments