Running Rake Tasks In WAS without JRuby

Question

Related to : Executing rake tasks on an exploded war on tomcat without jruby being installed

I'm trying to run rake tasks in my Tomcat server that doesn't have JRuby installed. I'm using warbler to create a war file.

Using the answer to the linked question, I ran:

java -cp lib/jruby-core*.jar:lib/jruby-stdlib*.jar org.jruby.Main -S rake -T

This gets me the error:

Exception in thread "main" java.lang.NoClassDefFoundError: org/jruby/Main
Caused by: java.lang.ClassNotFoundException: org.jruby.Main
    at java.net.URLClassLoader$1.run(URLClassLoader.java:217)

ls lib gets me:

ems-gems-activerecord-jdbc-adapter-1.2.2-lib-arjdbc-jdbc-adapter_java.jar
gems-gems-jdbc-sqlite3-3.7.2-lib-sqlite-jdbc-3.7.2.jar
gems-gems-jruby-jars-1.6.8-lib-jruby-core-1.6.8.jar
gems-gems-jruby-jars-1.6.8-lib-jruby-stdlib-1.6.8.jar
gems-gems-jruby-rack-1.1.10-lib-jruby-rack-1.1.10.jar
gems-gems-json-1.7.5-java-lib-json-ext-generator.jar
gems-gems-json-1.7.5-java-lib-json-ext-parser.jar
gems-gems-therubyrhino_jar-1.7.4-jar-rhino-1.7R4.jar
gems-gems-warbler-1.3.6-lib-warbler_jar.jar
jruby-core-1.6.8.jar
jruby-rack-1.1.10.jar
jruby-stdlib-1.6.8.jar
ojdbc6.jar

Opening up the jruby-core-1.6.8.jar file, I can see that there is indeed a org/jruby/Main.class file.

As one can see from the file listing, there is no jruby-complete jar file, so I can't run the command from https://stackoverflow.com/a/9982556/684934

What am I doing wrong, and is there by now a better way to do this?

yetanothersullivan yetanothersullivan · Accepted Answer · 2012-11-01T06:32:25

I was working on a similar problem 2 months ago, so things may have changed, but I needed to include all the jars in my class path, had to use bin stubs, and had to set GEM_HOME to get everything working. It may have been simpler, but the posts you referenced didn't work for me either.

I actually had jruby installed, (but I was only using it to build the concatenated class path), so my setup was something like:

cd /path/to/application/
export GEM_HOME=/path/to/application/gems
export CLASSPATH=$(jruby -e 'puts Dir["lib/*.jar"].join(":")')

RAILS_ENV=production java -cp $CLASSPATH org.jruby.Main bin/rake -T

Also useful, the jruby-jars gem can be included in your gemfile to set the version of jruby that warbler includes (I was using gem 'jruby-jars', '1.7.0.preview2' as 1.7.0 wasn't released yet)

Running Rake Tasks In WAS without JRuby

1 Answers