Module: TraceView::Config

Defined in:
lib/traceview/config.rb

Overview

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

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

Constant Summary collapse

@@config = 
{}
@@instrumentation = 
[:action_controller, :action_view, :active_record,
:cassandra, :dalli, :em_http_request, :excon, :faraday,
:grape, :httpclient, :nethttp, :memcached, :memcache, :mongo,
:moped, :rack, :redis, :resque, :rest_client, :sequel,
:typhoeus]
@@http_clients =

Subgrouping of instrumentation

[:excon, :faraday, :httpclient, :nethttp, :rest_client, :typhoeus]

Class Method Summary collapse

Class Method Details

.[](key) ⇒ Object 



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# File 'lib/traceview/config.rb', line 171

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

.[]=(key, value) ⇒ Object 



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# File 'lib/traceview/config.rb', line 175

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

  if key == :sampling_rate
    TraceView.logger.warn 'sampling_rate is not a supported setting for TraceView::Config.  ' \
                     'Please use :sample_rate.'

  elsif key == :sample_rate
    unless value.is_a?(Integer) || value.is_a?(Float)
      fail 'traceview :sample_rate must be a number between 1 and 1000000 (1m)'
    end

    # Validate :sample_rate value
    unless value.between?(1, 1e6)
      fail 'traceview :sample_rate must be between 1 and 1000000 (1m)'
    end

    # Assure value is an integer
    @@config[key.to_sym] = value.to_i
    TraceView.set_sample_rate(value) if TraceView.loaded

  elsif key == :include_url_query_params
    # Obey the global flag and update all of the per instrumentation
    # <tt>:log_args</tt> values.
    @@http_clients.each do |i|
      @@config[i][:log_args] = value
    end

  elsif key == :include_remote_url_params
    # Obey the global flag and update all of the per instrumentation
    # <tt>:log_args</tt> values.
    @@config[:rack][:log_args] = value
  end

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

.initialize(_data = {}) ⇒ Object 



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# File 'lib/traceview/config.rb', line 30

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

  # Beta instrumentation disabled by default
  TraceView::Config[:em_http_request][:enabled] = false

  # Set collect_backtraces defaults
  TraceView::Config[:action_controller][:collect_backtraces] = true
  TraceView::Config[:active_record][:collect_backtraces] = true
  TraceView::Config[:action_view][:collect_backtraces] = true
  TraceView::Config[:cassandra][:collect_backtraces] = true
  TraceView::Config[:dalli][:collect_backtraces] = false
  TraceView::Config[:em_http_request][:collect_backtraces] = false
  TraceView::Config[:excon][:collect_backtraces] = true
  TraceView::Config[:faraday][:collect_backtraces] = false
  TraceView::Config[:grape][:collect_backtraces] = true
  TraceView::Config[:httpclient][:collect_backtraces] = true
  TraceView::Config[:memcache][:collect_backtraces] = false
  TraceView::Config[:memcached][:collect_backtraces] = false
  TraceView::Config[:mongo][:collect_backtraces] = true
  TraceView::Config[:moped][:collect_backtraces] = true
  TraceView::Config[:nethttp][:collect_backtraces] = true
  TraceView::Config[:redis][:collect_backtraces] = false
  TraceView::Config[:resque][:collect_backtraces] = true
  TraceView::Config[:rest_client][:collect_backtraces] = false
  TraceView::Config[:sequel][:collect_backtraces] = true
  TraceView::Config[:typhoeus][:collect_backtraces] = false

  # 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: TraceView::API::Util.blacklisted?)
  @@config[:blacklist] = []

  # Access Key is empty until loaded from config file or env var
  @@config[:access_key] = ''

  # Logging of outgoing HTTP query args
  #
  # This optionally disables the logging of query args of outgoing
  # HTTP clients such as Net::HTTP, excon, typhoeus and others.
  #
  # This flag is global to all HTTP client instrumentation.
  #
  # To configure this on a per instrumentation basis, set this
  # option to true and instead disable the instrumenstation specific
  # option <tt>log_args</tt>:
  #
  #   TraceView::Config[:nethttp][:log_args] = false
  #   TraceView::Config[:excon][:log_args] = false
  #   TraceView::Config[:typhoeus][:log_args] = true
  #
  @@config[:include_url_query_params] = true

  # Logging of incoming HTTP query args
  #
  # This optionally disables the logging of incoming URL request
  # query args.
  #
  # This flag is global and currently only affects the Rack
  # instrumentation which reports incoming request URLs and
  # query args by default.
  @@config[:include_remote_url_params] = true

  # The TraceView Ruby gem 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

  # Do Not Trace
  # These two values allow you to configure specific URL patterns to
  # never be traced.  By default, this is set to common static file
  # extensions but you may want to customize this list for your needs.
  #
  # dnt_regexp and dnt_opts is passed to Regexp.new to create
  # a regular expression object.  That is then used to match against
  # the incoming request path.
  #
  # The path string originates from the rack layer and is retrieved
  # as follows:
  #
  #   req = ::Rack::Request.new(env)
  #   path = URI.unescape(req.path)
  #
  # Usage:
  #   TraceView::Config[:dnt_regexp] = "lobster$"
  #   TraceView::Config[:dnt_opts]   = Regexp::IGNORECASE
  #
  # This will ignore all requests that end with the string lobster
  # regardless of case
  #
  # Requests with positive matches (non nil) will not be traced.
  # See lib/traceview/util.rb: TraceView::Util.static_asset?
  #
  @@config[:dnt_regexp] = "\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|ttf|woff|svg|less)$"
  @@config[:dnt_opts]   = Regexp::IGNORECASE

  # In Rails, raised exceptions with rescue handlers via
  # <tt>rescue_from</tt> are not reported to the TraceView
  # dashboard by default.  Setting this value to true will
  # report all raised exception regardless.
  @@config[:report_rescued_errors] = false

  # Environment support for OpenShift.
  if ENV.key?('OPENSHIFT_TRACEVIEW_TLYZER_IP')
    # We're running on OpenShift
    @@config[:tracing_mode] = 'always'
    @@config[:reporter_host] = ENV['OPENSHIFT_TRACEVIEW_TLYZER_IP']
    @@config[:reporter_port] = ENV['OPENSHIFT_TRACEVIEW_TLYZER_PORT']
  else
    # The default configuration
    @@config[:tracing_mode] = 'through'
    @@config[:reporter_host] = '127.0.0.1'
    @@config[:reporter_port] = '7831'
  end

  @@config[:verbose] = ENV.key?('TRACEVIEW_GEM_VERBOSE') ? true : false
end

.merge!(data) ⇒ Object 



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# File 'lib/traceview/config.rb', line 167

def self.merge!(data)
  self.update!(data)
end

.method_missing(sym, *args) ⇒ Object 



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# File 'lib/traceview/config.rb', line 215

def self.method_missing(sym, *args)
  class_var_name = "@@#{sym}"

  if sym.to_s =~ /(.+)=$/
    self[$1] = args.first
  else
    # Try part of the @@config hash first
    if @@config.key?(sym)
      self[sym]

    # Then try as a class variable
    elsif self.class_variable_defined?(class_var_name.to_sym)
      self.class_eval(class_var_name)

    # Congrats - You've won a brand new nil...
    else
      nil
    end
  end
end

.show ⇒ Object

Return the raw nested hash.



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# File 'lib/traceview/config.rb', line 26

def self.show
  @@config
end

.update!(data) ⇒ Object 



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# File 'lib/traceview/config.rb', line 161

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