Class: Datadog::Tracing::Configuration::Dynamic::TracingSamplingRules

Inherits:
SimpleOption
  • Object
show all
Defined in:
lib/datadog/tracing/configuration/dynamic.rb

Overview

Dynamic configuration for ‘DD_TRACE_SAMPLING_RULES`.

Instance Attribute Summary

Attributes inherited from Option

#env_var, #name

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TracingSamplingRules

Returns a new instance of TracingSamplingRules.



58
59
60
 
# File 'lib/datadog/tracing/configuration/dynamic.rb', line 58

def initialize
  super('tracing_sampling_rules', 'DD_TRACE_SAMPLING_RULES', :rules)
end

Instance Method Details

#call(tracing_sampling_rules) ⇒ Object

Ensures sampler is rebuilt and new configuration is applied



63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
 
# File 'lib/datadog/tracing/configuration/dynamic.rb', line 63

def call(tracing_sampling_rules)
  # Modify the remote configuration value that it matches the
  # local environment variable it configures.
  if tracing_sampling_rules
    tracing_sampling_rules.each do |rule|
      next unless (tags = rule['tags'])

      # Tag maps come in as arrays of 'key' and `value_glob`.
      # We need to convert them into a hash for local use.
      tag_array = tags.map! do |tag|
        [tag['key'], tag['value_glob']]
      end

      rule['tags'] = tag_array.to_h
    end

    # The configuration is stored as JSON, so we need to convert it back
    tracing_sampling_rules = tracing_sampling_rules.to_json
  end

  super(tracing_sampling_rules)
  Datadog.send(:components).reconfigure_live_sampler
end