Merge branch 'master' into 'docs-hard-tabs'docs-hard-tabs

# Conflicts:
#   doc/administration/pseudonymizer.md
#   doc/administration/uploads.md

1 files changed, 50 insertions, 0 deletions

diff --git a/config/initializers/elastic_client_setup.rb b/config/initializers/elastic_client_setup.rb
new file mode 100644
index 00000000000..2ecb7956007
--- /dev/null
+++ b/config/initializers/elastic_client_setup.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+# Be sure to restart your server when you modify this file.
+
+require 'gitlab/current_settings'
+
+Gitlab.ee do
+  Elasticsearch::Model::Response::Records.prepend GemExtensions::Elasticsearch::Model::Response::Records
+  Elasticsearch::Model::Adapter::Multiple::Records.prepend GemExtensions::Elasticsearch::Model::Adapter::Multiple::Records
+  Elasticsearch::Model::Indexing::InstanceMethods.prepend GemExtensions::Elasticsearch::Model::Indexing::InstanceMethods
+
+  module Elasticsearch
+    module Model
+      module Client
+        # This mutex is only used to synchronize *creation* of a new client, so
+        # all including classes can share the same client instance
+        CLIENT_MUTEX = Mutex.new
+
+        cattr_accessor :cached_client
+        cattr_accessor :cached_config
+
+        module ClassMethods
+          # Override the default ::Elasticsearch::Model::Client implementation to
+          # return a client configured from application settings. All including
+          # classes will use the same instance, which is refreshed automatically
+          # if the settings change.
+          #
+          # _client is present to match the arity of the overridden method, where
+          # it is also not used.
+          #
+          # @return [Elasticsearch::Transport::Client]
+          def client(_client = nil)
+            store = ::Elasticsearch::Model::Client
+
+            store::CLIENT_MUTEX.synchronize do
+              config = Gitlab::CurrentSettings.elasticsearch_config
+
+              if store.cached_client.nil? || config != store.cached_config
+                store.cached_client = ::Gitlab::Elastic::Client.build(config)
+                store.cached_config = config
+              end
+            end
+
+            store.cached_client
+          end
+        end
+      end
+    end
+  end
+end