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tag: v2_3_5
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require 'yaml'
require 'newrelic/agent/method_tracer'

def to_stderr(s)
  STDERR.puts "** [NewRelic] " + s
end

# Initializer for the NewRelic Agent
config_filename = File.join(File.dirname(__FILE__), '..','..','..','config','newrelic.yml')
begin
  newrelic_config_file = File.read(config_filename)

  newrelic_agent_config = YAML.load(newrelic_config_file)[RAILS_ENV] || {}
  newrelic_agent_config.freeze
  ::NR_CONFIG_FILE = newrelic_agent_config
  
  ::RPM_AGENT_ENABLED = newrelic_agent_config['enabled']
  ::RPM_DEVELOPER = newrelic_agent_config['developer']

  ::RPM_TRACERS_ENABLED = ::RPM_DEVELOPER || ::RPM_AGENT_ENABLED
  
  # Check to see if the agent should be enabled or not
  
  disabled = ENV['NEWRELIC_ENABLE'] && ENV['NEWRELIC_ENABLE'].downcase =~ /false|off|no/
  
  # note if the agent is not turned on via the enabled flag in the
  # configuration file, the application will be untouched, and it will
  # behave exaclty as if the agent were never installed in the first place.
  if !disabled && (::RPM_AGENT_ENABLED || ::RPM_DEVELOPER)
    require 'newrelic/agent'
  
    agent = NewRelic::Agent.instance
    agent.start(newrelic_agent_config)
  
    # When (and only when) RPM is running in developer mode, a few pages
    # are added to your application that present performance information
    # on the last 100 http requests your application has handled, allowing
    # you to diagnose performance problems on your desktop.
    #
    # to see this information, visit http://localhost:3000/newrelic
    if ::RPM_DEVELOPER
      controller_path = File.join(File.dirname(__FILE__), 'ui', 'controllers')
      helper_path = File.join(File.dirname(__FILE__), 'ui', 'helpers')
      $LOAD_PATH << controller_path
      $LOAD_PATH << helper_path
      Dependencies.load_paths << controller_path
      Dependencies.load_paths << helper_path
      config.controller_paths << controller_path
      require 'newrelic_routing'
      
      # inform user that the dev edition is available if we are running inside
      # a webserver process
      if agent.local_port
        to_stderr "NewRelic Agent (Developer Mode) enabled."
        to_stderr "To view performance information, go to http://localhost:#{agent.local_port}/newrelic"
      end
    end
  end
rescue Errno::ENOENT => e
  to_stderr "could not find configuration file #{config_filename}."
  to_stderr "be sure to put newrelic.yml into your config directory."
  to_stderr "Agent is disabled."
rescue Exception => e
  to_stderr "Error parsing #{config_filename}"
  to_stderr "#{e}"
   to_stderr e.backtrace.join("\n")
  to_stderr "Agent is disabled."
end
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