Method: Datadog::Tracing::Sampling::RuleSampler.parse

Defined in:
lib/datadog/tracing/sampling/rule_sampler.rb

.parse(rules, rate_limit, default_sample_rate) ⇒ Object 



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# File 'lib/datadog/tracing/sampling/rule_sampler.rb', line 55

def self.parse(rules, rate_limit, default_sample_rate)
  parsed_rules = JSON.parse(rules).map do |rule|
    sample_rate = rule['sample_rate']

    begin
      sample_rate = Float(sample_rate)
    rescue
      raise "Rule '#{rule.inspect}' does not contain a float property `sample_rate`"
    end

    kwargs = {
      name: rule['name'],
      service: rule['service'],
      resource: rule['resource'],
      tags: rule['tags'],
      sample_rate: sample_rate,
      provenance: if (provenance = rule['provenance'])
                    # `Rule::PROVENANCE_*` values are symbols, so convert strings to match
                    provenance.to_sym
                  else
                    Rule::PROVENANCE_LOCAL
                  end,
    }

    kwargs.compact!

    SimpleRule.new(**kwargs)
  end

  new(parsed_rules, rate_limit: rate_limit, default_sample_rate: default_sample_rate)
rescue => e
  Datadog.logger.warn do
    "Could not parse trace sampling rules '#{rules}': #{e.class.name} #{e.message} at #{Array(e.backtrace).first}"
  end

  nil
end