redstorm/examples/simple/ruby_version_topology.rb

require 'red_storm'

# this example topology only prints the Ruby version string. No tuple is emitted.

module RedStorm
  module Examples
    class VersionSpout < RedStorm::SimpleSpout
      output_fields :dummy
      on_init do
        log.info("***************** RUBY_VERSION=#{RUBY_VERSION}")
        log.info("***************** JRUBY_VERSION=#{JRUBY_VERSION}")
        log.info("***************** VERSION=#{VERSION}")
        log.info("***************** RUBY_ENGINE=#{RUBY_ENGINE}")
        log.info("***************** RUBY_PLATFORM=#{RUBY_PLATFORM}")
      end
      on_send {}
    end

    class RubyVersionTopology < RedStorm::SimpleTopology
      spout VersionSpout
            
      configure do |env|
        debug true

        # force the JRuby version property for this topology. this will only affect remote cluster execution
        # for local execution use the --1.8|--1.9 switch when launching
        # set "topology.worker.childopts", "-Djruby.compat.version=RUBY1_9"
      end

      on_submit do |env|
        if env == :local
          sleep(5)
          cluster.shutdown
        end
      end
    end
  end
end