FITS with Nailgun?

[jpstroop]

Related to #18: FITS contains a script, fits-ngserver.sh that starts a Nailgun server, which would save us having to spin up the JVM for every call to FITS. We'd probably get a good performance boost.

me@here:~ $ fits-ngserver.sh $NAILGUN_JAR &
[1] 9820
me@here:~ $ You may now run FITS by typing: ng edu.harvard.hul.ois.fits.Fits [options]
Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar 
NGServer started on all interfaces, port 2113.

me@here:~ $ time ng-nailgun edu.harvard.hul.ois.fits.Fits -i Desktop/pul-logo-tall-md-trans_0.png -o /tmp/sample.xml

real    0m1.854s // <------------------------------
user    0m0.000s
sys 0m0.000s
NGSession 1: 127.0.0.1: edu.harvard.hul.ois.fits.Fits exited with status 0
me@here:~ $ time ng-nailgun edu.harvard.hul.ois.fits.Fits -i Desktop/pul-logo-tall-md-trans_0.png -o /tmp/sample.xml

real    0m0.464s // <------------------------------
user    0m0.000s
sys 0m0.000s
NGSession 2: 127.0.0.1: edu.harvard.hul.ois.fits.Fits exited with status 0

[narogers]

Another alternative might be to run FITS as a service (https://github.com/harvard-lts/FITSservlet). I have been experimenting with it from the command line using CURL and it appears to be much more performant than fit.sh for a limited test run of TIFFs, RAW images, and JPEGs.

[narogers]

This is what I've done to get it working with a configurable option that calls local FITS if the file size is over a certain threshold (currently 500MB). It isn't perfect but shows that it shouldn't be too much work to implement.

https://github.com/ClevelandArtGIT/cma-archives/blob/master/app/services/cma/characterization_service.rb