Reorganize usage data util methods

- Moves the util methods to lib/gitlab/utils
- Moves specs

lib/gitlab/usage_data.rb

 # frozen_string_literal: true
 
-# For hardening usage ping and make it easier to add measures there is in place
-#   * alt_usage_data method
-#     handles StandardError and fallbacks into -1 this way not all measures fail if we encounter one exception
+# When developing usage data metrics use the below usage data interface methods
+# unless you have good reasons to implement custom usage data
+# See `lib/gitlab/utils/usage_data.rb`
 #
-#     Examples:
+# Examples
+#   issues_using_zoom_quick_actions: distinct_count(ZoomMeeting, :issue_id),
+#   active_user_count: count(User.active)
 #   alt_usage_data { Gitlab::VERSION }
-#     alt_usage_data { Gitlab::CurrentSettings.uuid }
-#
-#   * redis_usage_data method
-#     handles ::Redis::CommandError, Gitlab::UsageDataCounters::BaseCounter::UnknownEvent
-#     returns -1 when a block is sent or hash with all values -1 when a counter is sent
-#     different behaviour due to 2 different implementations of redis counter
-#
-#     Examples:
 #   redis_usage_data(Gitlab::UsageDataCounters::WikiPageCounter)
 #   redis_usage_data { ::Gitlab::UsageCounters::PodLogs.usage_totals[:total] }
+
 module Gitlab
   class UsageData
     BATCH_SIZE = 100
-    FALLBACK = -1
 
     class << self
+      include Gitlab::Utils::UsageData
+
       def data(force_refresh: false)
         Rails.cache.fetch('usage_data', force: force_refresh, expires_in: 2.weeks) do
           uncached_data
@@ -382,58 +378,6 @@ module Gitlab
         {} # augmented in EE
       end
 
-      def count(relation, column = nil, batch: true, start: nil, finish: nil)
-        if batch && Feature.enabled?(:usage_ping_batch_counter, default_enabled: true)
-          Gitlab::Database::BatchCount.batch_count(relation, column, start: start, finish: finish)
-        else
-          relation.count
-        end
-      rescue ActiveRecord::StatementInvalid
-        FALLBACK
-      end
-
-      def distinct_count(relation, column = nil, batch: true, start: nil, finish: nil)
-        if batch && Feature.enabled?(:usage_ping_batch_counter, default_enabled: true)
-          Gitlab::Database::BatchCount.batch_distinct_count(relation, column, start: start, finish: finish)
-        else
-          relation.distinct_count_by(column)
-        end
-      rescue ActiveRecord::StatementInvalid
-        FALLBACK
-      end
-
-      def alt_usage_data(value = nil, fallback: FALLBACK, &block)
-        if block_given?
-          yield
-        else
-          value
-        end
-      rescue
-        fallback
-      end
-
-      def redis_usage_data(counter = nil, &block)
-        if block_given?
-          redis_usage_counter(&block)
-        elsif counter.present?
-          redis_usage_data_totals(counter)
-        end
-      end
-
-      private
-
-      def redis_usage_counter
-        yield
-      rescue ::Redis::CommandError, Gitlab::UsageDataCounters::BaseCounter::UnknownEvent
-        FALLBACK
-      end
-
-      def redis_usage_data_totals(counter)
-        counter.totals
-      rescue ::Redis::CommandError, Gitlab::UsageDataCounters::BaseCounter::UnknownEvent
-        counter.fallback_totals
-      end
-
       def installation_type
         if Rails.env.production?
           Gitlab::INSTALLATION_TYPE

lib/gitlab/utils/usage_data.rb

+# frozen_string_literal: true
+
+# Usage data utilities
+#
+#   * distinct_count(relation, column = nil, batch: true, start: nil, finish: nil)
+#     Does a distinct batch count, smartly reduces batch_size and handles errors
+#
+#     Examples:
+#     issues_using_zoom_quick_actions: distinct_count(ZoomMeeting, :issue_id),
+#
+#   * count(relation, column = nil, batch: true, start: nil, finish: nil)
+#     Does a non-distinct batch count, smartly reduces batch_size and handles errors
+#
+#     Examples:
+#     active_user_count: count(User.active)
+#
+#   * alt_usage_data method
+#     handles StandardError and fallbacks into -1 this way not all measures fail if we encounter one exception
+#
+#     Examples:
+#     alt_usage_data { Gitlab::VERSION }
+#     alt_usage_data { Gitlab::CurrentSettings.uuid }
+#
+#   * redis_usage_data method
+#     handles ::Redis::CommandError, Gitlab::UsageDataCounters::BaseCounter::UnknownEvent
+#     returns -1 when a block is sent or hash with all values -1 when a counter is sent
+#     different behaviour due to 2 different implementations of redis counter
+#
+#     Examples:
+#     redis_usage_data(Gitlab::UsageDataCounters::WikiPageCounter)
+#     redis_usage_data { ::Gitlab::UsageCounters::PodLogs.usage_totals[:total] }
+
+module Gitlab
+  module Utils
+    module UsageData
+      extend self
+
+      FALLBACK = -1
+
+      def count(relation, column = nil, batch: true, start: nil, finish: nil)
+        if batch && Feature.enabled?(:usage_ping_batch_counter, default_enabled: true)
+          Gitlab::Database::BatchCount.batch_count(relation, column, start: start, finish: finish)
+        else
+          relation.count
+        end
+      rescue ActiveRecord::StatementInvalid
+        FALLBACK
+      end
+
+      def distinct_count(relation, column = nil, batch: true, start: nil, finish: nil)
+        if batch && Feature.enabled?(:usage_ping_batch_counter, default_enabled: true)
+          Gitlab::Database::BatchCount.batch_distinct_count(relation, column, start: start, finish: finish)
+        else
+          relation.distinct_count_by(column)
+        end
+      rescue ActiveRecord::StatementInvalid
+        FALLBACK
+      end
+
+      def alt_usage_data(value = nil, fallback: FALLBACK, &block)
+        if block_given?
+          yield
+        else
+          value
+        end
+      rescue
+        fallback
+      end
+
+      def redis_usage_data(counter = nil, &block)
+        if block_given?
+          redis_usage_counter(&block)
+        elsif counter.present?
+          redis_usage_data_totals(counter)
+        end
+      end
+
+      private
+
+      def redis_usage_counter
+        yield
+      rescue ::Redis::CommandError, Gitlab::UsageDataCounters::BaseCounter::UnknownEvent
+        FALLBACK
+      end
+
+      def redis_usage_data_totals(counter)
+        counter.totals
+      rescue ::Redis::CommandError, Gitlab::UsageDataCounters::BaseCounter::UnknownEvent
+        counter.fallback_totals
+      end
+    end
+  end
+end

spec/lib/gitlab/usage_data_spec.rb

@@ -549,40 +549,6 @@ describe Gitlab::UsageData, :aggregate_failures do
           end
         end
       end
-
-      describe '#count' do
-        let(:relation) { double(:relation) }
-
-        it 'returns the count when counting succeeds' do
-          allow(relation).to receive(:count).and_return(1)
-
-          expect(described_class.count(relation, batch: false)).to eq(1)
-        end
-
-        it 'returns the fallback value when counting fails' do
-          stub_const("Gitlab::UsageData::FALLBACK", 15)
-          allow(relation).to receive(:count).and_raise(ActiveRecord::StatementInvalid.new(''))
-
-          expect(described_class.count(relation, batch: false)).to eq(15)
-        end
-      end
-
-      describe '#distinct_count' do
-        let(:relation) { double(:relation) }
-
-        it 'returns the count when counting succeeds' do
-          allow(relation).to receive(:distinct_count_by).and_return(1)
-
-          expect(described_class.distinct_count(relation, batch: false)).to eq(1)
-        end
-
-        it 'returns the fallback value when counting fails' do
-          stub_const("Gitlab::UsageData::FALLBACK", 15)
-          allow(relation).to receive(:distinct_count_by).and_raise(ActiveRecord::StatementInvalid.new(''))
-
-          expect(described_class.distinct_count(relation, batch: false)).to eq(15)
-        end
-      end
     end
   end
 
@@ -601,42 +567,4 @@ describe Gitlab::UsageData, :aggregate_failures do
 
     it_behaves_like 'usage data execution'
   end
-
-  describe '#alt_usage_data' do
-    it 'returns the fallback when it gets an error' do
-      expect(described_class.alt_usage_data { raise StandardError } ).to eq(-1)
-    end
-
-    it 'returns the evaluated block when give' do
-      expect(described_class.alt_usage_data { Gitlab::CurrentSettings.uuid } ).to eq(Gitlab::CurrentSettings.uuid)
-    end
-
-    it 'returns the value when given' do
-      expect(described_class.alt_usage_data(1)).to eq 1
-    end
-  end
-
-  describe '#redis_usage_data' do
-    context 'with block given' do
-      it 'returns the fallback when it gets an error' do
-        expect(described_class.redis_usage_data { raise ::Redis::CommandError } ).to eq(-1)
-      end
-
-      it 'returns the evaluated block when given' do
-        expect(described_class.redis_usage_data { 1 }).to eq(1)
-      end
-    end
-
-    context 'with counter given' do
-      it 'returns the falback values for all counter keys when it gets an error' do
-        allow(::Gitlab::UsageDataCounters::WikiPageCounter).to receive(:totals).and_raise(::Redis::CommandError)
-        expect(described_class.redis_usage_data(::Gitlab::UsageDataCounters::WikiPageCounter)).to eql(::Gitlab::UsageDataCounters::WikiPageCounter.fallback_totals)
-      end
-
-      it 'returns the totals when couter is given' do
-        allow(::Gitlab::UsageDataCounters::WikiPageCounter).to receive(:totals).and_return({ wiki_pages_create: 2 })
-        expect(described_class.redis_usage_data(::Gitlab::UsageDataCounters::WikiPageCounter)).to eql({ wiki_pages_create: 2 })
-      end
-    end
-  end
 end

spec/lib/gitlab/utils/usage_data_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Utils::UsageData do
+  describe '#count' do
+    let(:relation) { double(:relation) }
+
+    it 'returns the count when counting succeeds' do
+      allow(relation).to receive(:count).and_return(1)
+
+      expect(described_class.count(relation, batch: false)).to eq(1)
+    end
+
+    it 'returns the fallback value when counting fails' do
+      stub_const("Gitlab::Utils::UsageData::FALLBACK", 15)
+      allow(relation).to receive(:count).and_raise(ActiveRecord::StatementInvalid.new(''))
+
+      expect(described_class.count(relation, batch: false)).to eq(15)
+    end
+  end
+
+  describe '#distinct_count' do
+    let(:relation) { double(:relation) }
+
+    it 'returns the count when counting succeeds' do
+      allow(relation).to receive(:distinct_count_by).and_return(1)
+
+      expect(described_class.distinct_count(relation, batch: false)).to eq(1)
+    end
+
+    it 'returns the fallback value when counting fails' do
+      stub_const("Gitlab::Utils::UsageData::FALLBACK", 15)
+      allow(relation).to receive(:distinct_count_by).and_raise(ActiveRecord::StatementInvalid.new(''))
+
+      expect(described_class.distinct_count(relation, batch: false)).to eq(15)
+    end
+  end
+
+  describe '#alt_usage_data' do
+    it 'returns the fallback when it gets an error' do
+      expect(described_class.alt_usage_data { raise StandardError } ).to eq(-1)
+    end
+
+    it 'returns the evaluated block when give' do
+      expect(described_class.alt_usage_data { Gitlab::CurrentSettings.uuid } ).to eq(Gitlab::CurrentSettings.uuid)
+    end
+
+    it 'returns the value when given' do
+      expect(described_class.alt_usage_data(1)).to eq 1
+    end
+  end
+
+  describe '#redis_usage_data' do
+    context 'with block given' do
+      it 'returns the fallback when it gets an error' do
+        expect(described_class.redis_usage_data { raise ::Redis::CommandError } ).to eq(-1)
+      end
+
+      it 'returns the evaluated block when given' do
+        expect(described_class.redis_usage_data { 1 }).to eq(1)
+      end
+    end
+
+    context 'with counter given' do
+      it 'returns the falback values for all counter keys when it gets an error' do
+        allow(::Gitlab::UsageDataCounters::WikiPageCounter).to receive(:totals).and_raise(::Redis::CommandError)
+        expect(described_class.redis_usage_data(::Gitlab::UsageDataCounters::WikiPageCounter)).to eql(::Gitlab::UsageDataCounters::WikiPageCounter.fallback_totals)
+      end
+
+      it 'returns the totals when couter is given' do
+        allow(::Gitlab::UsageDataCounters::WikiPageCounter).to receive(:totals).and_return({ wiki_pages_create: 2 })
+        expect(described_class.redis_usage_data(::Gitlab::UsageDataCounters::WikiPageCounter)).to eql({ wiki_pages_create: 2 })
+      end
+    end
+  end
+end