Jading is a build and execution tool for cascading.jruby that handles packaging all the dependencies of your scripts into a jar for execution on a Hadoop cluster.
The primary entry point to Jading is the script "jade." This script operates in two modes, build and execution. The first allows you to produce jade jars, which contain everything you need to run a cascading.jruby job on a Hadoop cluster. The second is a convenience wrapper for hadoop jar that selects the correct "runner" code from Jading's library to run your job remotely.
Running:
jade \
-g jruby-openssl \
-g json \
-l lib/operators/target/custom-cascading-operators-0.0.2.jar \
-l lib/operators/target/emr \
lib/jobs/helpers \
lib/ruby/cli.rb \
lib/ruby/barnum_date.rb \
lib/jobs/cascading/nightly/index_events.rb
Produces jade.jar in the current directory, which can be executed on a Hadoop cluster using:
jade -e index_events.rb yesterday_path=2012_04_26 input_prefix=hdfs://logs.etsy.com ...
For more details, see jade -h and Getting Started in the wiki.