class NewRelic::Agent::RulesEngine::SegmentTermsRule

Constants

ADJACENT_PLACEHOLDERS_REGEX
ADJACENT_PLACEHOLDERS_REPLACEMENT
PREFIX_KEY
TERMS_KEY

Attributes

prefix[R]
terms[R]

Public Class Methods

new(options) click to toggle source
# File lib/new_relic/agent/rules_engine/segment_terms_rule.rb, line 30
def initialize(options)
  @prefix = options[PREFIX_KEY]
  @terms = options[TERMS_KEY]
  @trim_range = (@prefix.size..-1)
end
valid?(rule_spec) click to toggle source
# File lib/new_relic/agent/rules_engine/segment_terms_rule.rb, line 16
def self.valid?(rule_spec)
  rule_spec[PREFIX_KEY].kind_of?(String) &&
    rule_spec[TERMS_KEY].kind_of?(Array) &&
    valid_prefix_segment_count?(rule_spec[PREFIX_KEY])
end
valid_prefix_segment_count?(prefix) click to toggle source
# File lib/new_relic/agent/rules_engine/segment_terms_rule.rb, line 22
def self.valid_prefix_segment_count?(prefix)
  count = prefix.count(SEGMENT_SEPARATOR)
  rindex = prefix.rindex(SEGMENT_SEPARATOR)

  (count == 2 && prefix[rindex + 1].nil?) ||
    (count == 1 && !prefix[rindex + 1].nil?)
end

Public Instance Methods

apply(string) click to toggle source
# File lib/new_relic/agent/rules_engine/segment_terms_rule.rb, line 50
def apply(string)
  rest = string[@trim_range]
  leading_slash = rest.slice!(LEADING_SLASH_REGEX)
  segments = rest.split(SEGMENT_SEPARATOR, -1)
  segments.map! { |s| @terms.include?(s) ? s : ASTERISK }
  transformed_suffix = collapse_adjacent_placeholder_segments(segments)

  "#{@prefix}#{leading_slash}#{transformed_suffix}"
end
collapse_adjacent_placeholder_segments(segments) click to toggle source
# File lib/new_relic/agent/rules_engine/segment_terms_rule.rb, line 60
def collapse_adjacent_placeholder_segments(segments)
  joined = segments.join(SEGMENT_SEPARATOR)
  joined.gsub!(ADJACENT_PLACEHOLDERS_REGEX, ADJACENT_PLACEHOLDERS_REPLACEMENT)
  joined
end
matches?(string) click to toggle source
# File lib/new_relic/agent/rules_engine/segment_terms_rule.rb, line 40
def matches?(string)
  string.start_with?(@prefix) &&
    (prefix_matches_on_segment_boundary?(string) || string.size == @prefix.size)
end
prefix_matches_on_segment_boundary?(string) click to toggle source
# File lib/new_relic/agent/rules_engine/segment_terms_rule.rb, line 45
def prefix_matches_on_segment_boundary?(string)
  string.size > @prefix.size &&
    string[@prefix.chomp(SEGMENT_SEPARATOR).size].chr == SEGMENT_SEPARATOR
end
terminal?() click to toggle source
# File lib/new_relic/agent/rules_engine/segment_terms_rule.rb, line 36
def terminal?
  true
end