Change search indexing to use batches to minimize resource usage (#18451)

lib/chewy/strategy/mastodon.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+module Chewy
+  class Strategy
+    class Mastodon < Base
+      def initialize
+        super
+
+        @stash = Hash.new { |hash, key| hash[key] = [] }
+      end
+
+      def update(type, objects, _options = {})
+        @stash[type].concat(type.root.id ? Array.wrap(objects) : type.adapter.identify(objects)) if Chewy.enabled?
+      end
+
+      def leave
+        RedisConfiguration.with do |redis|
+          redis.pipelined do |pipeline|
+            @stash.each do |type, ids|
+              pipeline.sadd("chewy:queue:#{type.name}", ids)
+            end
+          end
+        end
+      end
+    end
+  end
+end