Use the New Relic Ruby agent to report 10,000 spans within a minute

span_events.rb

#!/usr/bin/env ruby
# frozen_string_literal: true

# Instructions:
#  1. Copy a valid newrelic.yml file to the same directory as span_events.rb
#  2. Make sure at least the following parameters are set in newrelic.yml:
#    - license_key: <your license key>
#    - audit_log.enabled: true
#    - span_events.max_samples_stored: 10000
#  3. ruby span_events.rb
#  4. Check the stdout output to confirm that a capacity of 10,000 spans was
#     successfully configured and that 10,000 spans were indeed reported.
#  5. Count the number of '"type":"Span"' occurrences in the
#     log/newrelic_audit.log file to confirm it is 10,000:
#
#       grep -o '"type":"Span"' log/newrelic_audit.log|wc -l
#
#  NOTE: Be sure to delete the log directory before repeating the steps.

require 'bundler/inline'

puts 'Bundling the New Relic Ruby agent...'
gemfile do
  source 'https://rubygems.org'
  gem 'newrelic_rpm'
end

require 'new_relic/agent'
require 'tasks/newrelic'

module The
  # The::Example - repro demo class
  class Example
    include ::NewRelic::Agent::Instrumentation::ControllerInstrumentation
    include ::NewRelic::Agent::MethodTracer

    def transaction_creating_method
      12_000.times { span_creating_method }
    end
    add_transaction_tracer :transaction_creating_method, category: :task

    def span_creating_method
      11 + 38
    end
    add_method_tracer :span_creating_method
  end
end

NewRelic::Agent.manual_start

puts 'Testing...'

sec = NewRelic::Agent.instance.span_event_aggregator.instance_variable_get(:@buffer).instance_variable_get(:@capacity)
puts "The New Relic Ruby agent's span event capacity is internally showing as maxing out at #{sec} events"

start_time = Time.now
The::Example.new.transaction_creating_method
stop_time = Time.now
puts "Elapsed #{stop_time - start_time}"

s = NewRelic::Agent.instance.span_event_aggregator.instance_variable_get(:@buffer).instance_variable_get(:@seen)
i = NewRelic::Agent.instance.span_event_aggregator.instance_variable_get(:@buffer).instance_variable_get(:@items).size
puts "The New Relic Ruby agent's span event buffer believes it has seen #{s} spans and is prepared to report on " \
  "#{i} spans"

puts 'Shutting down the New Relic Ruby agent...'
NewRelic::Agent.shutdown