Module: TraceView::Loading

Defined in:
lib/traceview/loading.rb

Overview

This module houses all of the loading functionality for the traceview gem.

Note that this does not necessarily have to include initialization routines (although it can).

Actual initialization is often separated out as it can be dependent on on the state of the stack boot process. e.g. code requiring that initializers, frameworks or instrumented libraries are already loaded…

Class Method Summary collapse

Class Method Details

.load_access_key ⇒ Object

Load the TraceView access key (either from system configuration file or environment variable) and calculate internal RUM ID



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# File 'lib/traceview/loading.rb', line 44

def self.load_access_key
  if ENV.key?('TRACEVIEW_CUUID')
    # Preferably get access key from environment (e.g. Heroku)
    TraceView::Config[:access_key] = ENV['TRACEVIEW_CUUID']
    TraceView::Config[:rum_id] = TraceView::Util::Base64URL.encode(Digest::SHA1.digest('RUM' + TraceView::Config[:access_key]))
  else
    # ..else read from system-wide configuration file
    if TraceView::Config.access_key.empty?
      config_file = '/etc/tracelytics.conf'
      return unless File.exist?(config_file)

      File.open(config_file).each do |line|
        if line =~ /^tracelyzer.access_key=/ || line =~ /^access_key/
          bits = line.split(/=/)
          TraceView::Config[:access_key] = bits[1].strip
          TraceView::Config[:rum_id] = TraceView::Util::Base64URL.encode(Digest::SHA1.digest('RUM' + TraceView::Config[:access_key]))
          break
        end
      end
    end
  end
rescue StandardError => e
  TraceView.logger.error "Trouble obtaining access_key and rum_id: #{e.inspect}"
end

.require_api ⇒ Object

Load the traceview tracing API



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# File 'lib/traceview/loading.rb', line 72

def self.require_api
  pattern = File.join(File.dirname(__FILE__), 'api', '*.rb')
  Dir.glob(pattern) do |f|
    require f
  end
  require 'traceview/api'

  begin
    TraceView::API.extend_with_tracing
  rescue LoadError => e
    TraceView.logger.fatal "[traceview/error] Couldn't load api: #{e.message}"
  end
end