More JavaFx Fun

Here is another JavaFx demo that I've been building. It is a simple implementation of John Conway's "Game of Life".

http://en.wikipedia.org/wiki/Conway's_Game_of_Life

The demo is a simple simulator, just click on the boxes to turn them "on" or "off". When you are ready, click on the "start" button to begin the simulation. You can increase the speed at which the simulation runs by moving the slider up and down. You can also step through the simulation by clicking the "Enter" or "Return" key.

Here are the links

Java WebStart: link
Java Applet: link

Here's a link to the source code, link.

Free Spring / Groovy Training Videos

Here are some links to a few nice Spring and Groovy training videos.

SpringSource Free Training Videos

http://www.springsource.com/training/freeonline

There are currently three videos.

Metaprogramming with Groovy by Jeff Brown
OSGi and Modular Applications by Joris Kuipers
Developing Aspects with AOP by Jeff Brown

Good stuff, check'em out!

Excellent Grails Posts

Just wanted to quickly point out this excellent series of posts by Peter Ledbrook detailing some of the gotchas when working with Grails & GORM. Veteran or neophyte this is a good read for any Grails developer.

http://blog.springsource.com/2010/06/23/gorm-gotchas-part-1/

http://blog.springsource.com/2010/07/02/gorm-gotchas-part-2/

http://blog.springsource.com/2010/07/28/gorm-gotchas-part-3/

Clonezilla & Windows

I was trying to restore a Windows Clonezilla image today and encountered a weird error. Windows would boot, but it would not start. Instead the following error would be shown.

autochk program not found

Fortunately I was able to boot into Ubuntu and mount the partition, so I could verify that my data was safe.

After searching on Google, I found some information on using a DOS tool to modify the partition to type 7 (link).

Not having access to a DOS boot disk, I decided to see if I could do the same think in Linux which turned out to be quite simple.

STANDARD DISCLAIMER

I'M NOT RESPONSIBLE IF YOU DESTROY YOUR DATA

PLEASE BE VERY CAREFUL WHEN USING FDISK!!! DO NOT ATTEMPT THIS UNLESS YOU KNOW WHAT YOU ARE DOING AND THEN THINK TWICE!!

Should you still want to proceed, here's how you can do it.

First, boot into Linux. If you do not have a dual-boot system, simply use one of the many Linux boot CD's. Once up and running in Linux, as root, execute the following commands.

First, execute "fdisk -l" this will list your current drives and partitions. Find the drive which contains the problem partition. In my case this was /dev/sda, it could be "sdb", "hda", "hdb" or something else that follows that pattern.

Second, execute "fdisk /dev/sda". Substitute your disk name for "/dev/sda". This will launch fdisk.

Now fdisk will be running so the following command will be executed in the fdisk shell. First, execute "p" to print the partition table. In my case, the problem partition, "/dev/sda2" was incorrectly listed as a Linux partition.

To fix this problem, use the "t" option and set the partition type to 7 (which is the partition type for NTFS).

Now, execute "p" again, to make sure the type is correctly set to NTFS. If all looks good, execute "w" to write out the changes then quit fdisk.

Everything should be OK now, simply restart and you should be able to boot successfully into Windows.