newrelic for em-http-request with em-synchrony

rpm_instrumentation.rb

if defined?(::EM::HTTPMethods) and defined?(::EM::Synchrony)
  module EM::HTTPMethods
    def request_with_newrelic_trace(type, *args, &block)
      uri = @uri.kind_of?(Addressable::URI) ? @uri : Addressable::URI::parse(@uri.to_s)
      metrics = ["External/#{uri.host}/EM::HTTPMethods/#{type.to_s.upcase}","External/#{uri.host}/a
ll"]

      if NewRelic::Agent::Instrumentation::MetricFrame.recording_web_transaction?
        metrics << "External/allWeb"
      else
        metrics << "External/allOther"
      end

      self.class.trace_execution_scoped metrics do
        self.send("#{type}_without_newrelic_trace", *args, &block)
      end

    end
  end

  %w[get head post delete put].each do |type|
    EM::HTTPMethods.class_eval %[
      def #{type}_with_newrelic_trace(*args, &block)
        request_with_newrelic_trace(:#{type}, *args, &block)
      end

      alias #{type}_without_newrelic_trace #{type}
      alias #{type} #{type}_with_newrelic_trace
    ]
  end
end