Stubbing in jruby version

mostly to get used to jruby, I suppose, but I need to know how to use
the official rabbitmq java client in this context, too.

sylvilagus/jruby/.gitignore

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+/tmp/
+/lib/java/*.jar

sylvilagus/jruby/.rbenv-version

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+jruby-1.6.7.2

sylvilagus/jruby/Rakefile

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+require 'open-uri'
+
+directory './tmp'
+
+file './tmp/rabbitmq-java-client-bin-2.8.7.tar.gz' => ['./tmp'] do |f|
+  open('http://www.rabbitmq.com/releases/rabbitmq-java-client/v2.8.7/rabbitmq-java-client-bin-2.8.7.tar.gz') do |f|
+    open('./tmp/rabbitmq-java-client-bin.tar.gz', 'w') do |out|
+      out.write(f.read)
+    end
+  end
+end
+
+file './tmp/rabbitmq-java-client-bin-2.8.7' => ['./tmp/rabbitmq-java-client-bin-2.8.7.tar.gz'] do
+  Dir.chdir('./tmp') do
+    `tar xzvf rabbitmq-java-client-bin.tar.gz`
+  end
+end
+
+file './lib/java/rabbitmq-client.jar' => ['./tmp/rabbitmq-java-client-bin-2.8.7'] do
+  Dir['./tmp/rabbitmq-java-client-bin-2.8.7/*.jar'].each do |jar|
+    FileUtils.mv(jar, './lib/java', :verbose => true)
+  end
+end
+
+desc 'Download and copy over the rabbitmq client jar'
+task :rabbitmq_client_jar => ['./lib/java/rabbitmq-client.jar']
+
+task :default => [:rabbitmq_client_jar]