Release 8.5.0

CHANGES.txt

@@ -1,5 +1,9 @@
 CHANGES
 
+8.5.0 (Jan 17, 2025)
+- Fixed high cpu usage when unique keys are cleared every 24 hours.
+- Added support for the new impressions tracking toggle available on feature flags, both respecting the setting and including the new field being returned on SplitView type objects. Read more in our docs.
+
 8.4.0 (May 3, 2024)
 - Fixed issue preventing Impressopns and Events posting if client.destroy is called before the post threads started
 - Added support for targeting rules based on semantic versions (https://semver.org/).

LICENSE

@@ -1,4 +1,4 @@
-Copyright © 2024 Split Software, Inc.
+Copyright © 2025 Split Software, Inc.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

lib/splitclient-rb/cache/filter/bloom_filter.rb

@@ -8,31 +8,35 @@ module Filter
       class BloomFilter
         def initialize(capacity, false_positive_probability = 0.001)
           @capacity = capacity.round
-          m = best_m(capacity, false_positive_probability)
-          @ba = BitArray.new(m.round)
+          @m = best_m(capacity, false_positive_probability)
+          reset_filter
           @k = best_k(capacity)
         end
 
         def add(string)
           return false if contains?(string)
 
           positions = hashes(string)
-
           positions.each { |position| @ba[position] = 1 }
 
           true
         end
-      
+
         def contains?(string)
           !hashes(string).any? { |ea| @ba[ea] == 0 }
         end
 
         def clear
-          @ba.size.times { |i| @ba[i] = 0 }
+          @ba = nil
+          reset_filter
         end
-      
+
         private
 
+        def reset_filter
+          @ba = BitArray.new(@m.round)
+        end
+
         # m is the required number of bits in the array
         def best_m(capacity, false_positive_probability)
           -(capacity * Math.log(false_positive_probability)) / (Math.log(2) ** 2)

lib/splitclient-rb/clients/split_client.rb

@@ -267,7 +267,7 @@ def treatments(key, feature_flag_names, attributes = {}, calling_method = 'get_t
         to_return = Hash.new
         sanitized_feature_flag_names.each {|name|
           to_return[name.to_sym] = control_treatment_with_config
-          impressions << @impressions_manager.build_impression(matching_key, bucketing_key, name.to_sym, control_treatment_with_config.merge({ label: Engine::Models::Label::NOT_READY }), { attributes: attributes, time: nil })
+          impressions << { :impression => @impressions_manager.build_impression(matching_key, bucketing_key, name.to_sym, control_treatment_with_config.merge({ :label => Engine::Models::Label::NOT_READY }), false, { attributes: attributes, time: nil }), :disabled => false }
         }
         @impressions_manager.track(impressions)
         return to_return
@@ -278,7 +278,6 @@ def treatments(key, feature_flag_names, attributes = {}, calling_method = 'get_t
         valid_feature_flag_names << feature_flag_name unless feature_flag_name.nil?
       }
       start = Time.now
-      impressions_total = []
 
       feature_flags = @splits_repository.splits(valid_feature_flag_names)
       treatments = Hash.new
@@ -291,15 +290,14 @@ def treatments(key, feature_flag_names, attributes = {}, calling_method = 'get_t
           next
         end
         treatments_labels_change_numbers, impressions = evaluate_treatment(feature_flag, key, bucketing_key, matching_key, attributes, calling_method)
-        impressions_total.concat(impressions) unless impressions.nil?
         treatments[key] =
         {
           treatment: treatments_labels_change_numbers[:treatment],
           config: treatments_labels_change_numbers[:config]
         }
+        @impressions_manager.track(impressions) unless impressions.empty?
       end
       record_latency(calling_method, start)
-      @impressions_manager.track(impressions_total) unless impressions_total.empty?
 
       treatments.merge(invalid_treatments)
     end
@@ -332,50 +330,50 @@ def treatment(key, feature_flag_name, attributes = {}, split_data = nil, store_i
       end
 
       feature_flag = @splits_repository.get_split(feature_flag_name)
-      treatments, impressions = evaluate_treatment(feature_flag, feature_flag_name, bucketing_key, matching_key, attributes, calling_method, multiple)
+      treatments, impressions_decorator = evaluate_treatment(feature_flag, feature_flag_name, bucketing_key, matching_key, attributes, calling_method, multiple)
 
-      @impressions_manager.track(impressions) unless impressions.nil?
+      @impressions_manager.track(impressions_decorator) unless impressions_decorator.nil?
       treatments
     end
 
     def evaluate_treatment(feature_flag, feature_flag_name, bucketing_key, matching_key, attributes, calling_method, multiple = false)
-      impressions = []
+      impressions_decorator = []
       begin
         start = Time.now
         if feature_flag.nil? && ready?
           @config.logger.warn("#{calling_method}: you passed #{feature_flag_name} that " \
             'does not exist in this environment, please double check what feature flags exist in the Split user interface')
-          return parsed_treatment(control_treatment.merge({ label: Engine::Models::Label::NOT_FOUND }), multiple), nil
+          return parsed_treatment(control_treatment.merge({ :label => Engine::Models::Label::NOT_FOUND }), multiple), nil
         end
-        treatment_data =
+
         if !feature_flag.nil? && ready?
-          @evaluator.evaluate_feature_flag(
+          treatment_data = @evaluator.evaluate_feature_flag(
             { bucketing_key: bucketing_key, matching_key: matching_key }, feature_flag, attributes
           )
+          impressions_disabled = feature_flag[:impressionsDisabled]
         else
           @config.logger.error("#{calling_method}: the SDK is not ready, results may be incorrect for feature flag #{feature_flag_name}. Make sure to wait for SDK readiness before using this method.")
-          control_treatment.merge({ label: Engine::Models::Label::NOT_READY })
+          treatment_data = control_treatment.merge({ :label => Engine::Models::Label::NOT_READY })
+          impressions_disabled = false
         end
 
         record_latency(calling_method, start)
-        impression = @impressions_manager.build_impression(matching_key, bucketing_key, feature_flag_name, treatment_data, { attributes: attributes, time: nil })
-        impressions << impression unless impression.nil?
+        impression_decorator = { :impression => @impressions_manager.build_impression(matching_key, bucketing_key, feature_flag_name, treatment_data, impressions_disabled, { attributes: attributes, time: nil }), :disabled => impressions_disabled }
+        impressions_decorator << impression_decorator unless impression_decorator.nil?
       rescue StandardError => e
         @config.log_found_exception(__method__.to_s, e)
-
         record_exception(calling_method)
+        impression_decorator = { :impression => @impressions_manager.build_impression(matching_key, bucketing_key, feature_flag_name, control_treatment, false, { attributes: attributes, time: nil }), :disabled => false }
+        impressions_decorator << impression_decorator unless impression_decorator.nil?
 
-        impression = @impressions_manager.build_impression(matching_key, bucketing_key, feature_flag_name, control_treatment, { attributes: attributes, time: nil })
-        impressions << impression unless impression.nil?
-
-        return parsed_treatment(control_treatment.merge({ label: Engine::Models::Label::EXCEPTION }), multiple), impressions
+        return parsed_treatment(control_treatment.merge({ :label => Engine::Models::Label::EXCEPTION }), multiple), impressions_decorator
       end
 
-      return parsed_treatment(treatment_data, multiple), impressions
+      return parsed_treatment(treatment_data, multiple), impressions_decorator
     end
 
     def control_treatment
-      { treatment: Engine::Models::Treatment::CONTROL }
+      { :treatment => Engine::Models::Treatment::CONTROL }
     end
 
     def control_treatment_with_config

lib/splitclient-rb/engine/common/impressions_manager.rb

@@ -18,19 +18,16 @@ def initialize(config,
           @unique_keys_tracker = unique_keys_tracker
         end
 
-        def build_impression(matching_key, bucketing_key, split_name, treatment, params = {})
-          impression_data = impression_data(matching_key, bucketing_key, split_name, treatment, params[:time])
-
+        def build_impression(matching_key, bucketing_key, split_name, treatment_data, impressions_disabled, params = {})
+          impression_data = impression_data(matching_key, bucketing_key, split_name, treatment_data, params[:time])
           begin
-            case @config.impressions_mode
-            when :debug #  In DEBUG mode we should calculate the pt only.
-              impression_data[:pt] = @impression_observer.test_and_set(impression_data)
-            when :none # In NONE mode we should track the total amount of evaluations and the unique keys.
+            if @config.impressions_mode == :none || impressions_disabled
               @impression_counter.inc(split_name, impression_data[:m])
               @unique_keys_tracker.track(split_name, matching_key)
+            elsif @config.impressions_mode == :debug #  In DEBUG mode we should calculate the pt only.
+              impression_data[:pt] = @impression_observer.test_and_set(impression_data)
             else # In OPTIMIZED mode we should track the total amount of evaluations and deduplicate the impressions.
               impression_data[:pt] = @impression_observer.test_and_set(impression_data)
-
               @impression_counter.inc(split_name, impression_data[:m]) unless impression_data[:pt].nil?
             end
           rescue StandardError => e
@@ -40,24 +37,25 @@ def build_impression(matching_key, bucketing_key, split_name, treatment, params
           impression(impression_data, params[:attributes])
         end
 
-        def track(impressions)
-          return if impressions.empty?
-
-          stats = { dropped: 0, queued: 0, dedupe: 0 }
-          begin
-            case @config.impressions_mode
-            when :none
-              return
-            when :debug
-              track_debug_mode(impressions, stats)
-            when :optimized
-              track_optimized_mode(impressions, stats)
+        def track(impressions_decorator)
+          return if impressions_decorator.empty?
+
+          impressions_decorator.each do |impression_decorator|
+            impression_router.add_bulk([impression_decorator[:impression]])
+            stats = { dropped: 0, queued: 0, dedupe: 0 }
+            begin
+              next if @config.impressions_mode == :none || impression_decorator[:disabled]
+
+              if @config.impressions_mode == :debug
+                track_debug_mode([impression_decorator[:impression]], stats)
+              else
+                track_optimized_mode([impression_decorator[:impression]], stats)
+              end
+            rescue StandardError => e
+              @config.log_found_exception(__method__.to_s, e)
+            ensure
+              record_stats(stats)
             end
-          rescue StandardError => e
-            @config.log_found_exception(__method__.to_s, e)
-          ensure
-            record_stats(stats)
-            impression_router.add_bulk(impressions)
           end
         end
 
@@ -126,11 +124,10 @@ def track_debug_mode(impressions, stats)
 
         def track_optimized_mode(impressions, stats)
           optimized_impressions = impressions.select { |imp| should_queue_impression?(imp[:i]) }
-
+          stats[:dedupe] = impressions.length - optimized_impressions.length
           return if optimized_impressions.empty?
 
           stats[:dropped] = @impressions_repository.add_bulk(optimized_impressions)
-          stats[:dedupe] = impressions.length - optimized_impressions.length
           stats[:queued] = optimized_impressions.length - stats[:dropped]
         end
       end

lib/splitclient-rb/engine/synchronizer.rb

@@ -48,7 +48,7 @@ def start_periodic_data_recording
           events_sender
           start_telemetry_sync_task
         end
-        
+
         impressions_count_sender
         start_unique_keys_tracker_task
       end
@@ -175,7 +175,7 @@ def attempt_splits_sync(target_cn, fetch_options, max_retries, retry_delay_secon
 
       # Starts thread which loops constantly and sends impressions to the Split API
       def impressions_sender
-        ImpressionsSender.new(@impressions_repository, @config, @impressions_api).call unless @config.impressions_mode == :none
+        ImpressionsSender.new(@impressions_repository, @config, @impressions_api).call
       end
 
       # Starts thread which loops constantly and sends events to the Split API
@@ -185,7 +185,7 @@ def events_sender
 
       # Starts thread which loops constantly and sends impressions count to the Split API
       def impressions_count_sender
-        ImpressionsCountSender.new(@config, @impression_counter, @impressions_sender_adapter).call unless @config.impressions_mode == :debug
+        ImpressionsCountSender.new(@config, @impression_counter, @impressions_sender_adapter).call
       end
 
       def start_telemetry_sync_task
@@ -203,7 +203,7 @@ def sync_result(success, remaining_attempts, segment_names = nil)
       def sync_splits_and_segments
         @config.logger.debug('Synchronizing feature flags and segments ...') if @config.debug_enabled
         splits_result = @split_fetcher.fetch_splits
-        
+
         splits_result[:success] && @segment_fetcher.fetch_segments
       end
     end

lib/splitclient-rb/helpers/repository_helper.rb

@@ -13,6 +13,13 @@ def self.update_feature_flag_repository(feature_flag_repository, feature_flags,
             next
           end
 
+          unless feature_flag.key?(:impressionsDisabled)
+            feature_flag[:impressionsDisabled] = false
+            if config.debug_enabled
+              config.logger.debug("feature flag (#{feature_flag[:name]}) does not have impressionsDisabled field, setting it to false")
+            end
+          end
+
           config.logger.debug("storing feature flag (#{feature_flag[:name]})") if config.debug_enabled
           to_add.push(feature_flag)
         end

lib/splitclient-rb/managers/split_manager.rb

@@ -107,7 +107,8 @@ def build_split_view(name, split)
           change_number: split[:changeNumber],
           configs: split[:configurations] || {},
           sets: split[:sets] || [],
-          default_treatment: split[:defaultTreatment]
+          default_treatment: split[:defaultTreatment],
+          impressions_disabled: split[:impressionsDisabled]
         }
     end
 

lib/splitclient-rb/split_factory.rb

@@ -230,33 +230,22 @@ def build_telemetry_synchronizer(flag_sets, flag_sets_invalid)
     end
 
     def build_unique_keys_tracker
-      if @config.impressions_mode != :none
-        @unique_keys_tracker = Engine::Impressions::NoopUniqueKeysTracker.new
-        return
-      end
-
       bf = Cache::Filter::BloomFilter.new(30_000_000)
       filter_adapter = Cache::Filter::FilterAdapter.new(@config, bf)
       cache = Concurrent::Hash.new
       @unique_keys_tracker = Engine::Impressions::UniqueKeysTracker.new(@config, filter_adapter, @impressions_sender_adapter, cache)
     end
 
     def build_impressions_observer
-      if (@config.cache_adapter == :redis && @config.impressions_mode != :optimized) ||
-         (@config.cache_adapter == :memory && @config.impressions_mode == :none)
+      if (@config.cache_adapter == :redis && @config.impressions_mode != :optimized)
         @impression_observer = Observers::NoopImpressionObserver.new
       else
         @impression_observer = Observers::ImpressionObserver.new
       end
     end
 
     def build_impression_counter
-      case @config.impressions_mode
-      when :debug
-        @impression_counter = Engine::Common::NoopImpressionCounter.new
-      else
-        @impression_counter = Engine::Common::ImpressionCounter.new
-      end
+      @impression_counter = Engine::Common::ImpressionCounter.new
     end
 
     def build_impressions_sender_adapter

lib/splitclient-rb/version.rb

@@ -1,3 +1,3 @@
 module SplitIoClient
-  VERSION = '8.4.0'
+  VERSION = '8.5.0'
 end