Use the uri:classloader:/ custom path for setting up JARS_HOME and $LOAD_PATH

This will help the submitted topology operate much more like an embedded JRuby
use-case thanks to the recent improvements that @mkristian has made in JRuby
core

Fixes #12

build.gradle

@@ -19,7 +19,7 @@ apply plugin: 'java'
 apply plugin: 'com.github.jruby-gradle.jar'
 apply plugin: 'com.jfrog.bintray'
 
-version = '0.8.1'
+version = '0.9.0'
 group = 'com.github.jruby-gradle'
 description = "RedStorm integrates Ruby code via JRuby into the Storm distributed computation system"
 defaultTasks 'check', 'assemble'

lib/red_storm/topology_launcher.rb

@@ -37,6 +37,15 @@ class TopologyLauncher
     end
 
     env = args[0].to_sym
+
+    # If we're in the "cluster" mode that means we're running in an embedded JRuby
+    # and we should modify our environment to suit that, see:
+    # <https://github.com/jruby-gradle/redstorm/issues/12>
+    if env == :cluster
+      Dir.chdir('uri:classloader:/')
+      ENV['JARS_HOME'] = 'uri:classloader:/jars'
+      $LOAD_PATH.unshift('uri:classloader://')
+    end
     class_path = args[1]
 
     launch_path = Dir.pwd