Module: Oboe::Config

Defined in:
lib/oboe/config.rb

Overview

This module exposes a nested configuration hash that can be used to configure and/or modify the functionality of the oboe gem.

Use Oboe::Config.show to view the entire nested hash.

Constant Summary collapse

@@config = 
{}
@@instrumentation = 
[ :cassandra, :dalli, :nethttp, :memcached, :memcache, :mongo,
:moped, :rack, :resque, :action_controller, :action_view, 
:active_record ]

Class Method Summary collapse

Class Method Details

.[](key) ⇒ Object 



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# File 'lib/oboe/config.rb', line 83

def self.[](key)
  @@config[key.to_sym]
end

.[]=(key, value) ⇒ Object 



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# File 'lib/oboe/config.rb', line 87

def self.[]=(key, value)
  @@config[key.to_sym] = value

  if key == :sampling_rate
    Oboe.logger.warn "WARNING: :sampling_rate is not a supported setting for Oboe::Config.  Please use :sample_rate."
  end

  if key == :sample_rate
    # When setting SampleRate, note that it's been manually set
    # OBOE_SAMPLE_RATE_SOURCE_FILE == 1
    @@config[:sample_source] = 1 

    unless value.is_a?(Integer) or value.is_a?(Float)
      raise "oboe :sample_rate must be a number between 1 and 1000000 (1m)" 
    end
   
    # Validate :sample_rate value
    unless value.between?(1, 1e6)
      raise "oboe :sample_rate must be between 1 and 1000000 (1m)" 
    end

    # Assure value is an integer
    @@config[key.to_sym] = value.to_i
 
    Oboe.set_sample_rate(value)
  end

  # Update liboboe if updating :tracing_mode
  if key == :tracing_mode
    Oboe.set_tracing_mode(value)
  end
end

.initialize(data = {}) ⇒ Object 



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# File 'lib/oboe/config.rb', line 25

def self.initialize(data={})
  # Setup default instrumentation values
  @@instrumentation.each do |k|
    @@config[k] = {}
    @@config[k][:enabled] = true
    @@config[k][:collect_backtraces] = false
    @@config[k][:log_args] = true
  end

  # Set collect_backtraces defaults
  Oboe::Config[:action_controller][:collect_backtraces] = true
  Oboe::Config[:active_record][:collect_backtraces] = true
  Oboe::Config[:action_view][:collect_backtraces] = true
  Oboe::Config[:cassandra][:collect_backtraces] = true
  Oboe::Config[:dalli][:collect_backtraces] = false
  Oboe::Config[:memcache][:collect_backtraces] = false
  Oboe::Config[:memcached][:collect_backtraces] = false
  Oboe::Config[:mongo][:collect_backtraces] = true
  Oboe::Config[:moped][:collect_backtraces] = true
  Oboe::Config[:nethttp][:collect_backtraces] = true
  Oboe::Config[:resque][:collect_backtraces] = true

  # Special instrument specific flags
  #
  # :link_workers - associates enqueue operations with the jobs they queue by piggybacking
  #                 an additional argument that is stripped prior to job proecessing 
  #                 !!Note: Make sure both the queue side and the Resque workers are instrumented
  #                 or jobs will fail
  #                 (Default: false)
  @@config[:resque][:link_workers] = false

  # Setup an empty host blacklist (see: Oboe::API::Util.blacklisted?)
  @@config[:blacklist] = []

  # The oboe Ruby client has the ability to sanitize query literals
  # from SQL statements.  By default this is disabled.  Enable to
  # avoid collecting and reporting query literals to TraceView.
  @@config[:sanitize_sql] = false

  # The default configuration
  default_config = {
    :tracing_mode => "through",
    :reporter_host => "127.0.0.1",
    :sample_rate => 300000,
    :verbose => false 
  }
  update!(default_config)
  
  # For Initialization, mark this as the default SampleRate
  @@config[:sample_source] = 2 # OBOE_SAMPLE_RATE_SOURCE_DEFAULT
end

.method_missing(sym, *args) ⇒ Object 



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# File 'lib/oboe/config.rb', line 120

def self.method_missing(sym, *args)
  if sym.to_s =~ /(.+)=$/
    self[$1] = args.first
  else
    self[sym]
  end
end

.show ⇒ Object

Return the raw nested hash.



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# File 'lib/oboe/config.rb', line 21

def self.show
  @@config
end

.update!(data) ⇒ Object 



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# File 'lib/oboe/config.rb', line 77

def self.update!(data)
  data.each do |key, value|
    self[key] = value
  end
end