A Makerslide based delta 3D printer
Posted by Jim Morris on Sun Dec 16 16:47:33 -0800 2012
UPDATE the project is currently hosted on Github
... Show more ...Openbeam self balancing robot
Posted by Jim Morris on Mon Dec 03 02:26:22 -0800 2012
Having some time on my hands I have taken up several hobbies. One is 3D printing, and the other is restarting my robot hobby.
The 3D printing is a whole other story, and I'll probably blog about my adventures in modifying and building a Delta printer soon.
... Show more ...Groovy bean dialogs
Posted by Jim Morris on Tue Feb 21 16:36:46 -0800 2012
I really wanted to share this one as it is so cool.
I have been writing some database GUI admin tools using Groovy and I use SwingBuilder to build the UI as it tends to be easier than using Swing directly.
... Show more ...How to implement Polymorphic protocol buffers in Java
Posted by Jim Morris on Wed Nov 23 00:08:34 -0800 2011
I decided to use Googles Protocol Buffers for a new server. I have been writing custom binary protocols for over 15 years for my various servers, as well as using XML and JSON on occasions.
I prefer binary protocols as they tend to be lean and mean when it comes to bandwidth.
... Show more ...How to setup SyntaxHighlighter in Rails 3.1.1
Posted by Jim Morris on Sat Nov 12 01:36:29 -0800 2011
Or how to get Rails 3.1.1 assets in vendor/assets to work in
production.
Turn off forgery protection when using caching
Posted by Jim Morris on Sat Dec 18 01:04:06 -0800 2010
This one does not seem to be documented, and I just got bit.
After porting my
blog engine to Rails
3, I noticed that after a while comments were being rejected with an
ActionController::InvalidAuthenticityToken error.
Upgrading a Rails 2.2.2 app to Rails 3
Posted by Jim Morris on Fri Dec 17 15:27:17 -0800 2010
After porting my blog engine from Merb to Rails3 code here I thought I'd upgrade my Snow Dogs R Us Site (aka dogz.us) to Rails 3.
It was written in Rails 2.2.2 so I figured it would not be too hard, well it was easier to port my Merb App than it was my Rails app!
... Show more ...Upgrading a Ubuntu Dapper 6.06 server to Lucid 10.06 with software RAID 1
Posted by Jim Morris on Mon Nov 29 23:06:57 -0800 2010
I needed to upgrade a remote server that was running Dapper to Lucid, as Dapper is no longer supported (or will soon be EOL'd). This server uses a software RAID 1, and that seems to be the problem.
I tried to do this over the network via ssh in a screen, however after it upgraded to Hardy it failed to boot.
... Show more ...A Simple Challenge Response authentication scheme for Rails3
Posted by Jim Morris on Mon Nov 29 23:06:41 -0800 2010
UPDATE the following is for pre rails 3.1, there is an addendum at the end for rails 3.1+
I have ported my blog engine (that hosts this site), from Merb to Rails 3. You would expect it to be fairly simple as Rails 3 is meant to be the next version of Merb.
... Show more ...Running Erlang OTP applications as Daemons on Ubuntu Servers
Posted by Jim Morris on Sun Sep 19 17:26:42 -0700 2010
Recently I needed to deploy an Erlang OTP application to a production server, and was surprised at the lack of official documentation on how to do that. My requirements are to have the application run on system startup, and if the application crashes to have it automatically be restarted, some optional requirements are to have rotated logs and to get email notifications if the application does crash.
Erlang itself has several layers of supervision to keep its processes running, however on occasion the VM itself may crash, if it runs out of memory for instance. I would want the entire appliction to be restarted in that case.
... Show more ...
