[kepler-dev] Environment Variables and System Properties

[Scott Zimmer]

I am trying to set both system properties and environment variables from 
within Kepler on a Linux machine.  I am executing my workflows through 
KeplerWebService but I can get the same behavior if I type this command 
from the command line in the directory KEPLERHOME.

  java -Djava.awt.headless=true -classpath 
build-area/lib/ant.jar:kepler.jar org.kepler.build.runner.Kepler -server 
-repository=optensityARP -runwf -nogui       
/tmp/kar/50.17.219.137:8080_knb_services_QueryService/7341.417.2.kar

I have a file 
KEPLERHOME/kepler-2.2/resources/system.properties/kepler.properties with 
the following single line
WSX=yum

I have another file KEPLERHOME/kepler-2.2/module-info/environment.txt 
with the following single line
QAZ=/tmp/

I built a workflow with an actor that contains the following lines of code:
System.out.println("Environment");
System.out.println(System.getenv().toString());
System.out.println("Properties");
System.out.println(System.getProperties());

When I run this actor, neither WSX or QAZ appears in the result that is 
printed to the screen.  Am I missing something about how to set 
environment variables?  I also know that the code Run.java in 
org.kepler.build is printing to the screen "Set environment variable: 
QAZ = /tmp/" yet it doesn't appear to be set when my actor tries to 
access it.

My use case requires me to load a custom module which includes actors 
that call native libraries and need to add entries to PATH, and 
LD_LIBRARY_PATH as well as have a variable XUGGLE_HOME set as an 
environment variable.  I can easily set these variables using export 
PATH, export LD_LIBRARY_PATH, and export XUGGLE_HOME, but I want these 
variables to be loaded at run time so that new modules can be added with 
different environment variables without a need to reconfigure the 
machines where they are running.

Scott

-- 
Scott Zimmer
Optensity, Inc.
(512) 299-7218