Refactored WebIdeCommitsCount class

We're adding more redis base counters to the web ide and other
classes. We're refactoring this class in other to use the logic
in other places.

lib/api/commits.rb

@@ -126,7 +126,7 @@ module API
         if result[:status] == :success
           commit_detail = user_project.repository.commit(result[:result])
-          Gitlab::WebIdeCommitsCounter.increment if find_user_from_warden
+          Gitlab::UsageDataCounters::WebIdeCommitsCounter.increment if find_user_from_warden
           present commit_detail, with: Entities::CommitDetail, stats: params[:stats]
         else

lib/gitlab/usage_data.rb

@@ -130,7 +130,7 @@ module Gitlab
       def usage_counters
         {
-          web_ide_commits: Gitlab::WebIdeCommitsCounter.total_count
+          web_ide_commits: Gitlab::UsageDataCounters::WebIdeCommitsCounter.total_count
         }
       end

lib/gitlab/web_ide_commits_counter.rb → lib/gitlab/usage_data_counters/redis_counter.rb

 # frozen_string_literal: true
 module Gitlab
-  module WebIdeCommitsCounter
-    WEB_IDE_COMMITS_KEY = "WEB_IDE_COMMITS_COUNT".freeze
-
-    class << self
+  module UsageDataCounters
+    module RedisCounter
       def increment
-        Gitlab::Redis::SharedState.with { |redis| redis.incr(WEB_IDE_COMMITS_KEY) }
+        Gitlab::Redis::SharedState.with { |redis| redis.incr(redis_counter_key) }
       end
       def total_count
-        Gitlab::Redis::SharedState.with { |redis| redis.get(WEB_IDE_COMMITS_KEY).to_i }
+        Gitlab::Redis::SharedState.with { |redis| redis.get(redis_counter_key).to_i }
+      end
+
+      def redis_counter_key
+        raise NotImplementedError
       end
     end
   end

lib/gitlab/usage_data_counters/web_ide_commits_counter.rb

+# frozen_string_literal: true
+
+module Gitlab
+  module UsageDataCounters
+    class WebIdeCommitsCounter
+      extend RedisCounter
+
+      def self.redis_counter_key
+        'WEB_IDE_COMMITS_COUNT'
+      end
+    end
+  end
+end

spec/lib/gitlab/usage_data_counters/redis_counter_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::UsageDataCounters::RedisCounter, :clean_gitlab_redis_shared_state do
+  context 'when redis_key is not defined' do
+    subject do
+      Class.new.extend(described_class)
+    end
+
+    describe '.increment' do
+      it 'raises a NotImplementedError exception' do
+        expect { subject.increment}.to raise_error(NotImplementedError)
+      end
+    end
+
+    describe '.total_count' do
+      it 'raises a NotImplementedError exception' do
+        expect { subject.total_count}.to raise_error(NotImplementedError)
+      end
+    end
+  end
+
+  context 'when redis_key is defined' do
+    subject do
+      counter_module = described_class
+
+      Class.new do
+        extend counter_module
+
+        def self.redis_counter_key
+          'foo_redis_key'
+        end
+      end
+    end
+
+    describe '.increment' do
+      it 'increments the web ide commits counter by 1' do
+        expect do
+          subject.increment
+        end.to change { subject.total_count }.from(0).to(1)
+      end
+    end
+
+    describe '.total_count' do
+      it 'returns the total amount of web ide commits' do
+        subject.increment
+        subject.increment
+
+        expect(subject.total_count).to eq(2)
+      end
+    end
+  end
+end

spec/lib/gitlab/web_ide_commits_counter_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-
-describe Gitlab::WebIdeCommitsCounter, :clean_gitlab_redis_shared_state do
-  describe '.increment' do
-    it 'increments the web ide commits counter by 1' do
-      expect do
-        described_class.increment
-      end.to change { described_class.total_count }.from(0).to(1)
-    end
-  end
-
-  describe '.total_count' do
-    it 'returns the total amount of web ide commits' do
-      expect(described_class.total_count).to eq(0)
-    end
-  end
-end

spec/requests/api/commits_spec.rb

@@ -281,7 +281,7 @@ describe API::Commits do
       end
       it 'does not increment the usage counters using access token authentication' do
-        expect(::Gitlab::WebIdeCommitsCounter).not_to receive(:increment)
+        expect(::Gitlab::UsageDataCounters::WebIdeCommitsCounter).not_to receive(:increment)
         post api(url, user), params: valid_c_params
       end