He has since tripled in size and now is attempting to write some OpenMRS code. I need to sign him up for an OpenMRS ID soon so that he has a good username reserved for when he starts submitting patches.

I wrote this quick shell script to loop over the file and do a recursive grep for that key. The key is considered “used” if it exists in the current directory with quotes around it (single or double). This WILL NOT find keys if they are only used programmatically. (e.g. VAR + “.started”)

#!/bin/sh

# Loops over all the keys in the given messages.properties file
# and looks in the current directory for the string in quotes.
# Results are printed to stdout
#
# use: (from the “web” dir in openmrs)
# sh ./findunusedmessages.sh WEB-INF/messages.properties

propfile=$1
props=`awk -F= ‘{print $1}’ $propfile`
count=0
total=0

echo “These property keys were not found in the code base:”
for prop in $props
do
#echo “Looking for property: $prop”
if [ ! -z "$prop" ];
then
total=`expr $total + 1`
output=`grep –exclude-dir=”.svn” -re “[\'\"]$prop[\'\"]” *`
if [ -z "$output" ];
then
echo “$prop”
count=`expr $count + 1`
fi
fi
done

echo “done! Found $count possibly uneeded message keys in $propfile (out of $total total keys)”

Download the file here: findunusedmessages.sh

Overall I was quite pleased with how the training went. There were more people involved that I expected: 40+ were in attendance physically at the Regenstrief building at some point during the week and another 10-15 that participated via the online web casts! One very positive outcome from the week was that Darius and I created a lot of wiki pages directly from the content we were talking about. This gave us a blueprint from which to talk while preserving the content for future users to see. I am still waiting to hear from Michael about the long-term availability of daily recordings.

I really see these types of trainings being a good long term revenue stream for OpenMRS. Obviously it won’t be able to be the only source, but if we had 3-4 trainings a year at various locations around the globe we would be able to hit a large number of developers. (Doing an implementer-centered training is a whole other matter) We learned a lot through this training: get the word out earlier, give out pre-training required reading, and write the entire week’s lesson plans prior to starting the training!

I’ve been attempting to keep up with email while at home, but Andy has been fighting me for computer time!

SET FOREIGN_KEY_CHECKS=0

I put this as the first changeset in a liquibase xml file. This disables the foreign key and constraint checking in mysql. This would work for other db’s as well, but I haven’t looked up their syntax just yet.

Using the synaptic package manager, I installed recordmydesktop.  Eventually I discovered that this was not the gui part of the program and installed gtk-recordmydesktop.

I’ve been very happy with the results.

nightclock.html

After opening the file in your favorite browser you can press F11 to hide all the toolbars.

My first attempt was with Handbrake. That converted the MOV to an MP4 very nicely. However, I wasn’t able to upload those to Blip.tv and have them convert successfully every time to an flv. Blip was timing out on the longer videos and poorly converting the smaller ones.

I then decided to try the command line ffmpeg. There weren’t any gui tools around it that I found in the repo’s, so I just tried the standard

ffmpeg -i inputfilename.mov outputfilename.flv

but that did not work. Apparently JVC doesn’t put all the right properties into the mpg2 for ffmpeg to automatically pick up the properties because I kept getting a Floating point exception.

I assumed I needed to just manually set the full command with all the different video and audio settings, but I didn’t know what those should be.

After a bit more googling I found winff. From that app I copied the command line arguments over, tweaked them a bit, and came out with this:

ffmpeg -i INPUTFILENAME.mov -vcodec libx264 -deinterlace -vpre hq -crf 22 -r 29.97 -s 960×540 -aspect 16:9 -bf 2 -b 2000kb -ac 1 -ar 22050 -ab 96k OUTPUTFILENAME.flv

The trick is to use the libx264 codec instead of the flv one. After uploading these converted movies to Blip.tv I was pleased with the results.

I ran this for a few hours to get through all rows. (Note that it overwrites any uuids that are currently there)

Copy this into a sql script and run it with “source” in mysql at command line.

drop procedure update_uuids;
delimiter //
create procedure update_uuids() begin
set @max = (select max(obs_id) from obs);
set @x = 1;
repeat
set @y = @x + 100000;
update obs set uuid = uuid() where obs_id >=@x and obs_id <@y;
set @x = @y;
until @x > @max
end repeat;
end
//
delimiter ;
call update_uuids();

Tuwei was running v5.0.17 of MySQL. Upgrading to version 5.1.31 made the problem disappear.

WARN – InitializationFilter$InitializationCompletion$1.run(823) |2009-10-02 15:24:21,000| Error while trying to update to the latest database version
org.openmrs.util.DatabaseUpdateException: There was an error while updating the database to the latest. file: liquibase-update-to-latest.xml. Error: Migration failed for change set liquibase-update-to-latest.xml::2::upul:
Reason:
java.sql.SQLException: Can’t create/write to file ‘C:\WINDOWS\TEMP\#sql_fe4_0.MYI’ (Errcode: 17):
Caused By: Precondition Error
at org.openmrs.util.DatabaseUpdater.executeChangelog(DatabaseUpdater.java:145)
at org.openmrs.web.filter.initialization.InitializationFilter$InitializationCompletion$1.run(InitializationFilter.java:817)
at java.lang.Thread.run(Unknown Source)
Caused by: liquibase.exception.MigrationFailedException: Migration failed for change set liquibase-update-to-latest.xml::2::upul:
Reason:
java.sql.SQLException: Can’t create/write to file ‘C:\WINDOWS\TEMP\#sql_fe4_0.MYI’ (Errcode: 17):
Caused By: Precondition Error
at liquibase.ChangeSet.execute(ChangeSet.java:204)
at liquibase.parser.visitor.UpdateVisitor.visit(UpdateVisitor.java:26)
at org.openmrs.util.DatabaseUpdater$1OpenmrsUpdateVisitor.visit(DatabaseUpdater.java:177)
at liquibase.parser.ChangeLogIterator.run(ChangeLogIterator.java:41)
at org.openmrs.util.DatabaseUpdater.executeChangelog(DatabaseUpdater.java:201)
at org.openmrs.util.DatabaseUpdater.executeChangelog(DatabaseUpdater.java:142)
… 2 more
Caused by: liquibase.exception.PreconditionErrorException: Precondition Error
at liquibase.preconditions.ForeignKeyExistsPrecondition.check(ForeignKeyExistsPrecondition.java:36)
at liquibase.preconditions.NotPrecondition.check(NotPrecondition.java:18)
at liquibase.preconditions.AndPrecondition.check(AndPrecondition.java:21)
at liquibase.ChangeSet.execute(ChangeSet.java:169)
… 7 more