Getting List of Available Drivers from jar Folder

I'm trying to build a very very basic DB admin software for personal use (and if it works I'll turn it into an opensource project for people smarter than me to play with)
And I'm stuck with this problem:
I want the software to load DB Drivers at runtime, from a JAR folder. The same way Eclipse loads it's plugins.
Something like this (folder structure)
MainApp.jar <-- executable
/drivers/mysql.jar
/drivers/oracle.jar
/drivers/etc.jar
When I run MainApp the program should load the list of jars and tell me "you can use: mysql, oracle, and ETC"
But I can't find anything on the matter. I need an instance of the driver to get the properties (name) of it and I need the JDBC url to get an instance of the driver...
Is there any way to achieve this by having just the path to the drivers folder ?
Thanks in advance for any answer.

Basic Steps
- Read files in the folder with the jar extension. There is a class somewhere that does this and returns a list of files.
- Open the jar. You will need to learn about the 'zip' package - look for it in the java API.
- Sequence through the contents of the jar looking for any classes that implement the JDBC API. The base is the Connection interface. this requires loading the classes.
Once you do that an enhancement is to use a class loader to load the files. That way you can unload when done.

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Seriel port #1
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I even get this error message when I try to add cups-pdf (which I also installed oc).
Kind regards,
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Last edited by dencker90 (2011-12-30 17:53:10)

Hey fellow Archers!
The Introduction
The other day, I installed ArchLinux for the ARM processor on my GoFlex Home. Straight away I installed samba, got it set up and everything works like a charm with explosive transfer-rates compared to the old factory-firmware. Also put on a mysql server to centralize my xbmc database and pyload to download large files without having to have my laptop opened all the time. Have to admit, this Arch Linux is a glorious world!
The Setup
Well, after this positive input, now comes my problem. I wanted to share our printer on our LAN, so I did a little search to quickly find CUPS. Installed it together with all the dependencies, like foomatic, python (which was installed as pyload uses it) and all that stuff.
Changed the /etc/cups/cupsd.conf to listen on 0.0.0.0 and started the daemon.. Woohoo! Turned on the printer, opened the web interface, went to administration -> add printer and selected one of the printers available from this list:
Local printers
CUPS-PDF (Virtual PDF Printer)
HP PSC 2350 series USB MY5BNF4423KJ HPLIP (HP PSC 2350 series)
Seriel port #1
HP PSC 2350 series (HP PSC 2350 series)
HP Fax (HPLIP)
Before I proceed, I want to say that I have tried the following with both of the PSC-entries.
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Now, i selected the printer and just let the default values be, pressed continue and got this error message:
"Unable to get list of printer drivers: Unknown"
Well, googled it a bit and tried to blacklist lsusb, as well as chmod /dev/bus/usb/001/002 to 665 (even 777). Still the same error message. Also tried to install the printer with hp-setup -i which let me pick a ppd myself; didn't work either. Gave me an error message saying that it was unable to add the printer to cups. I have run out of options, and the almighty sir Google wont give me any solutions other than those which I have tried.
I even get this error message when I try to add cups-pdf (which I also installed oc).
Kind regards,
Rasmus Dencker
Last edited by dencker90 (2011-12-30 17:53:10)

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Message was edited by: Pierre L.

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It deserves some dukes :) Also, someone can improve on it to make sure it's 100%
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this is the code i am looking for
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Edited by: skul3r on Dec 19, 2008 6:47 AM

Getting List of Available Drivers from jar Folder

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