Simplify by using Gitlab::SafeRequestStore

These are clear wins.

app/controllers/concerns/with_performance_bar.rb

@@ -10,11 +10,7 @@ module WithPerformanceBar
   def peek_enabled?
     return false unless Gitlab::PerformanceBar.enabled?(current_user)
 
-    if RequestStore.active?
-      RequestStore.fetch(:peek_enabled) { cookie_or_default_value }
-    else
-      cookie_or_default_value
-    end
+    Gitlab::SafeRequestStore.fetch(:peek_enabled) { cookie_or_default_value }
   end
 
   private

app/models/concerns/cacheable_attributes.rb

@@ -27,11 +27,7 @@ module CacheableAttributes
     end
 
     def cached
-      if RequestStore.active?
-        RequestStore[:"#{name}_cached_attributes"] ||= retrieve_from_cache
-      else
-        retrieve_from_cache
-      end
+      Gitlab::SafeRequestStore[:"#{name}_cached_attributes"] ||= retrieve_from_cache
     end
 
     def retrieve_from_cache

app/models/legacy_diff_note.rb

@@ -20,11 +20,7 @@ class LegacyDiffNote < Note
   end
 
   def project_repository
-    if RequestStore.active?
-      RequestStore.fetch("project:#{project_id}:repository") { self.project.repository }
-    else
-      self.project.repository
-    end
+    Gitlab::SafeRequestStore.fetch("project:#{project_id}:repository") { self.project.repository }
   end
 
   def diff_file_hash

app/models/project.rb

@@ -2272,11 +2272,7 @@ class Project < ActiveRecord::Base
       end
     end
 
-    if RequestStore.active?
-      RequestStore.fetch("project-#{id}:branch-#{branch_name}:user-#{user.id}:branch_allows_collaboration") do
-        check_access.call
-      end
-    else
+    Gitlab::SafeRequestStore.fetch("project-#{id}:branch-#{branch_name}:user-#{user.id}:branch_allows_collaboration") do
       check_access.call
     end
   end

lib/banzai/filter/external_issue_reference_filter.rb

@@ -97,9 +97,7 @@ module Banzai
       private
 
       def external_issues_cached(attribute)
-        return project.public_send(attribute) unless RequestStore.active? # rubocop:disable GitlabSecurity/PublicSend
-
-        cached_attributes = RequestStore[:banzai_external_issues_tracker_attributes] ||= Hash.new { |h, k| h[k] = {} }
+        cached_attributes = Gitlab::SafeRequestStore[:banzai_external_issues_tracker_attributes] ||= Hash.new { |h, k| h[k] = {} }
         cached_attributes[project.id][attribute] = project.public_send(attribute) if cached_attributes[project.id][attribute].nil? # rubocop:disable GitlabSecurity/PublicSend
         cached_attributes[project.id][attribute]
       end

lib/feature.rb

@@ -28,11 +28,7 @@ class Feature
     end
 
     def persisted_names
-      if RequestStore.active?
-        RequestStore[:flipper_persisted_names] ||= FlipperFeature.feature_names
-      else
-        FlipperFeature.feature_names
-      end
+      Gitlab::SafeRequestStore[:flipper_persisted_names] ||= FlipperFeature.feature_names
     end
 
     def persisted?(feature)
@@ -76,8 +72,8 @@ class Feature
     end
 
     def flipper
-      if RequestStore.active?
-        RequestStore[:flipper] ||= build_flipper_instance
+      if Gitlab::SafeRequestStore.active?
+        Gitlab::SafeRequestStore[:flipper] ||= build_flipper_instance
       else
         @flipper ||= build_flipper_instance
       end

lib/gitlab/current_settings.rb

@@ -2,11 +2,7 @@ module Gitlab
   module CurrentSettings
     class << self
       def current_application_settings
-        if RequestStore.active?
-          RequestStore.fetch(:current_application_settings) { ensure_application_settings! }
-        else
-          ensure_application_settings!
-        end
+        Gitlab::SafeRequestStore.fetch(:current_application_settings) { ensure_application_settings! }
       end
 
       def fake_application_settings(attributes = {})

lib/gitlab/diff/position.rb

@@ -101,18 +101,14 @@ module Gitlab
         return @diff_file if defined?(@diff_file)
 
         @diff_file = begin
-          if RequestStore.active?
-            key = {
-              project_id: repository.project.id,
-              start_sha: start_sha,
-              head_sha: head_sha,
-              path: file_path
-            }
-
-            RequestStore.fetch(key) { find_diff_file(repository) }
-          else
-            find_diff_file(repository)
-          end
+          key = {
+            project_id: repository.project.id,
+            start_sha: start_sha,
+            head_sha: head_sha,
+            path: file_path
+          }
+
+          Gitlab::SafeRequestStore.fetch(key) { find_diff_file(repository) }
         end
       end
 

lib/gitlab/git/wiki.rb

@@ -115,11 +115,7 @@ module Gitlab
       def version(commit_id)
         commit_find_proc = -> { Gitlab::Git::Commit.find(@repository, commit_id) }
 
-        if RequestStore.active?
-          RequestStore.fetch([:wiki_version_commit, commit_id]) { commit_find_proc.call }
-        else
-          commit_find_proc.call
-        end
+        Gitlab::SafeRequestStore.fetch([:wiki_version_commit, commit_id]) { commit_find_proc.call }
       end
 
       def assert_type!(object, klass)

lib/gitlab/issuables_count_for_state.rb

 module Gitlab
   # Class for counting and caching the number of issuables per state.
   class IssuablesCountForState
-    # The name of the RequestStore cache key.
+    # The name of the Gitlab::SafeRequestStore cache key.
     CACHE_KEY = :issuables_count_for_state
 
     # The state values that can be safely casted to a Symbol.
@@ -10,12 +10,7 @@ module Gitlab
     # finder - The finder class to use for retrieving the issuables.
     def initialize(finder)
       @finder = finder
-      @cache =
-        if RequestStore.active?
-          RequestStore[CACHE_KEY] ||= initialize_cache
-        else
-          initialize_cache
-        end
+      @cache = Gitlab::SafeRequestStore[CACHE_KEY] ||= initialize_cache
     end
 
     def for_state_or_opened(state = nil)

lib/gitlab/performance_bar/peek_query_tracker.rb

@@ -23,7 +23,7 @@ module Gitlab
         end
 
         subscribe('sql.active_record') do |_, start, finish, _, data|
-          if RequestStore.active? && RequestStore.store[:peek_enabled]
+          if Gitlab::SafeRequestStore.store[:peek_enabled]
             # data[:cached] is only available starting from Rails 5.1.0
             # https://github.com/rails/rails/blob/v5.1.0/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb#L113
             # Before that, data[:name] was set to 'CACHE'