Contents

# frozen_string_literal: true

module Zipkin
  module Samplers
    # Probabilistic sampler
    #
    # Sample a portion of traces using trace_id as the random decision
    class Probabilistic
      def initialize(rate: 0.001)
        if rate < 0.0 || rate > 1.0
          raise "Sampling rate must be between 0.0 and 1.0, got #{rate.inspect}"
        end
        @boundary = TraceId::TRACE_ID_UPPER_BOUND * rate
      end

      def sample?(trace_id:, **)
        @boundary >= trace_id.to_i(16)
      end
    end
  end
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
zipkin-1.6.3	lib/zipkin/samplers/probabilistic.rb
zipkin-1.6.2	lib/zipkin/samplers/probabilistic.rb
zipkin-1.6.1	lib/zipkin/samplers/probabilistic.rb
zipkin-1.6.0	lib/zipkin/samplers/probabilistic.rb