Standalone New Relic Ruby agent demonstration

standalone.rb

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

# Instructions:
#  1. Copy newrelic.yml with a valid license key to the same directory as
#     standalone.rb
#  1. rm -rf log
#  2. ruby standalone.rb
#  3. inspect log/newrelic_agent.log

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'newrelic_rpm'
end

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

module The
  class Example
    include ::NewRelic::Agent::Instrumentation::ControllerInstrumentation
    include ::NewRelic::Agent::MethodTracer

    def self.class_method
      class_method_too
    end

    def self.class_method_too; end

    class << self
      include ::NewRelic::Agent::Instrumentation::ControllerInstrumentation
      include ::NewRelic::Agent::MethodTracer
      add_transaction_tracer :class_method, category: :task
      # include 2 metric names so that one (the first) is scoped and the other is unscoped
      add_method_tracer :class_method_too, %w[Custom/MLTtesting/ClassMethod1 Custom/MLTtesting/ClassMethod2]
    end

    def instance_method
      instance_method_too
    end
    add_transaction_tracer :instance_method, category: :task

    def instance_method_too; end
    # include 2 metric names so that one (the first) is scoped and the other is unscoped
    add_method_tracer :instance_method_too, %w[Custom/MLTtesting/InstanceMethod1 Custom/MLTtesting/InstanceMethod2]
  end
end

NewRelic::Agent.manual_start

puts 'Testing...'
5.times do
  The::Example.class_method
  The::Example.new.instance_method
end

puts 'Sleeping 60 secs...'
sleep 60

puts 'Shutdown'
NewRelic::Agent.shutdown