|
| 1 | +require 'concurrent' |
| 2 | + |
| 3 | +module SplitIoClient |
| 4 | + module Cache |
| 5 | + module Repositories |
| 6 | + class RuleBasedSegmentsRepository < Repository |
| 7 | + attr_reader :adapter |
| 8 | + DEFAULT_CONDITIONS_TEMPLATE = [{ |
| 9 | + conditionType: "ROLLOUT", |
| 10 | + matcherGroup: { |
| 11 | + combiner: "AND", |
| 12 | + matchers: [ |
| 13 | + { |
| 14 | + keySelector: nil, |
| 15 | + matcherType: "ALL_KEYS", |
| 16 | + negate: false, |
| 17 | + userDefinedSegmentMatcherData: nil, |
| 18 | + whitelistMatcherData: nil, |
| 19 | + unaryNumericMatcherData: nil, |
| 20 | + betweenMatcherData: nil, |
| 21 | + dependencyMatcherData: nil, |
| 22 | + booleanMatcherData: nil, |
| 23 | + stringMatcherData: nil |
| 24 | + }] |
| 25 | + } |
| 26 | + }] |
| 27 | + TILL_PREFIX = '.rbsegments.till' |
| 28 | + RB_SEGMENTS_PREFIX = '.rbsegment.' |
| 29 | + REGISTERED_PREFIX = '.segments.registered' |
| 30 | + |
| 31 | + def initialize(config) |
| 32 | + super(config) |
| 33 | + @adapter = case @config.cache_adapter.class.to_s |
| 34 | + when 'SplitIoClient::Cache::Adapters::RedisAdapter' |
| 35 | + SplitIoClient::Cache::Adapters::CacheAdapter.new(@config) |
| 36 | + else |
| 37 | + @config.cache_adapter |
| 38 | + end |
| 39 | + unless @config.mode.equal?(:consumer) |
| 40 | + @adapter.set_string(namespace_key(TILL_PREFIX), '-1') |
| 41 | + @adapter.initialize_map(namespace_key(REGISTERED_PREFIX)) |
| 42 | + end |
| 43 | + end |
| 44 | + |
| 45 | + def update(to_add, to_delete, new_change_number) |
| 46 | + to_add.each{ |rule_based_segment| add_rule_based_segment(rule_based_segment) } |
| 47 | + to_delete.each{ |rule_based_segment| remove_rule_based_segment(rule_based_segment) } |
| 48 | + set_change_number(new_change_number) |
| 49 | + end |
| 50 | + |
| 51 | + def get_rule_based_segment(name) |
| 52 | + rule_based_segment = @adapter.string(namespace_key("#{RB_SEGMENTS_PREFIX}#{name}")) |
| 53 | + |
| 54 | + JSON.parse(rule_based_segment, symbolize_names: true) if rule_based_segment |
| 55 | + end |
| 56 | + |
| 57 | + def rule_based_segment_names |
| 58 | + @adapter.find_strings_by_prefix(namespace_key(RB_SEGMENTS_PREFIX)) |
| 59 | + .map { |rule_based_segment_names| rule_based_segment_names.gsub(namespace_key(RB_SEGMENTS_PREFIX), '') } |
| 60 | + end |
| 61 | + |
| 62 | + def set_change_number(since) |
| 63 | + @adapter.set_string(namespace_key(TILL_PREFIX), since) |
| 64 | + end |
| 65 | + |
| 66 | + def get_change_number |
| 67 | + @adapter.string(namespace_key(TILL_PREFIX)) |
| 68 | + end |
| 69 | + |
| 70 | + def set_segment_names(names) |
| 71 | + return if names.nil? || names.empty? |
| 72 | + |
| 73 | + names.each do |name| |
| 74 | + @adapter.add_to_set(namespace_key(REGISTERED_PREFIX), name) |
| 75 | + end |
| 76 | + end |
| 77 | + |
| 78 | + def exists?(name) |
| 79 | + @adapter.exists?(namespace_key("#{RB_SEGMENTS_PREFIX}#{name}")) |
| 80 | + end |
| 81 | + |
| 82 | + def clear |
| 83 | + @adapter.clear(namespace_key) |
| 84 | + end |
| 85 | + |
| 86 | + def contains?(segment_names) |
| 87 | + return false if rule_based_segment_names.empty? |
| 88 | + |
| 89 | + return segment_names.to_set.subset?(rule_based_segment_names.to_set) |
| 90 | + end |
| 91 | + |
| 92 | + private |
| 93 | + |
| 94 | + def add_rule_based_segment(rule_based_segment) |
| 95 | + return unless rule_based_segment[:name] |
| 96 | + |
| 97 | + if check_undefined_matcher(rule_based_segment) |
| 98 | + @config.logger.warn("Rule based segment #{rule_based_segment[:name]} has undefined matcher, setting conditions to default template.") |
| 99 | + rule_based_segment[:conditions] = RuleBasedSegmentsRepository::DEFAULT_CONDITIONS_TEMPLATE |
| 100 | + end |
| 101 | + |
| 102 | + @adapter.set_string(namespace_key("#{RB_SEGMENTS_PREFIX}#{rule_based_segment[:name]}"), rule_based_segment.to_json) |
| 103 | + end |
| 104 | + |
| 105 | + def check_undefined_matcher(rule_based_segment) |
| 106 | + for condition in rule_based_segment[:conditions] |
| 107 | + for matcher in condition[:matcherGroup][:matchers] |
| 108 | + if !SplitIoClient::Condition.instance_methods(false).map(&:to_s).include?("matcher_#{matcher[:matcherType].downcase}") |
| 109 | + @config.logger.error("Detected undefined matcher #{matcher[:matcherType].downcase} in feature flag #{rule_based_segment[:name]}") |
| 110 | + return true |
| 111 | + end |
| 112 | + end |
| 113 | + end |
| 114 | + return false |
| 115 | + end |
| 116 | + |
| 117 | + def remove_rule_based_segment(rule_based_segment) |
| 118 | + @adapter.delete(namespace_key("#{RB_SEGMENTS_PREFIX}#{rule_based_segment[:name]}")) |
| 119 | + end |
| 120 | + end |
| 121 | + end |
| 122 | + end |
| 123 | +end |
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