5 files changed, 12 insertions, 12 deletions
diff --git a/actionview/lib/action_view/dependency_tracker.rb b/actionview/lib/action_view/dependency_tracker.rb
index 6e8c7f8203..7716955fd9 100644
--- a/actionview/lib/action_view/dependency_tracker.rb
+++ b/actionview/lib/action_view/dependency_tracker.rb
@@ -1,9 +1,9 @@
-require 'thread_safe'
+require 'concurrent'
 require 'action_view/path_set'
 
 module ActionView
   class DependencyTracker # :nodoc:
-    @trackers = ThreadSafe::Cache.new
+    @trackers = Concurrent::Map.new
 
     def self.find_dependencies(name, template, view_paths = nil)
       tracker = @trackers[template.handler]
diff --git a/actionview/lib/action_view/digestor.rb b/actionview/lib/action_view/digestor.rb
index 9a8a4feb2e..12e9723a02 100644
--- a/actionview/lib/action_view/digestor.rb
+++ b/actionview/lib/action_view/digestor.rb
@@ -1,11 +1,11 @@
-require 'thread_safe'
+require 'concurrent'
 require 'action_view/dependency_tracker'
 require 'monitor'
 
 module ActionView
   class Digestor
     cattr_reader(:cache)
-    @@cache          = ThreadSafe::Cache.new
+    @@cache          = Concurrent::Map.new
     @@digest_monitor = Monitor.new
 
     class PerRequestDigestCacheExpiry < Struct.new(:app) # :nodoc:
@@ -28,7 +28,7 @@ module ActionView
         cache_key = ([ options[:name], options[:finder].details_key.hash ].compact + Array.wrap(options[:dependencies])).join('.')
 
         # this is a correctly done double-checked locking idiom
-        # (ThreadSafe::Cache's lookups have volatile semantics)
+        # (Concurrent::Map's lookups have volatile semantics)
         @@cache[cache_key] || @@digest_monitor.synchronize do
           @@cache.fetch(cache_key) do # re-check under lock
             compute_and_store_digest(cache_key, options)
diff --git a/actionview/lib/action_view/lookup_context.rb b/actionview/lib/action_view/lookup_context.rb
index fba9a44cb1..8b7ede250a 100644
--- a/actionview/lib/action_view/lookup_context.rb
+++ b/actionview/lib/action_view/lookup_context.rb
@@ -1,4 +1,4 @@
-require 'thread_safe'
+require 'concurrent'
 require 'active_support/core_ext/module/remove_method'
 require 'active_support/core_ext/module/attribute_accessors'
 require 'action_view/template/resolver'
@@ -62,7 +62,7 @@ module ActionView
       alias :object_hash :hash
 
       attr_reader :hash
-      @details_keys = ThreadSafe::Cache.new
+      @details_keys = Concurrent::Map.new
 
       def self.get(details)
         if details[:formats]
diff --git a/actionview/lib/action_view/renderer/partial_renderer.rb b/actionview/lib/action_view/renderer/partial_renderer.rb
index 1f9e960488..39c8658ffe 100644
--- a/actionview/lib/action_view/renderer/partial_renderer.rb
+++ b/actionview/lib/action_view/renderer/partial_renderer.rb
@@ -1,5 +1,5 @@
 require 'action_view/renderer/partial_renderer/collection_caching'
-require 'thread_safe'
+require 'concurrent'
 
 module ActionView
   class PartialIteration
@@ -283,8 +283,8 @@ module ActionView
   class PartialRenderer < AbstractRenderer
     include CollectionCaching
 
-    PREFIXED_PARTIAL_NAMES = ThreadSafe::Cache.new do |h, k|
-      h[k] = ThreadSafe::Cache.new
+    PREFIXED_PARTIAL_NAMES = Concurrent::Map.new do |h, k|
+      h[k] = Concurrent::Map.new
     end
 
     def initialize(*)
diff --git a/actionview/lib/action_view/template/resolver.rb b/actionview/lib/action_view/template/resolver.rb
index 28967f40a6..7859c58b43 100644
--- a/actionview/lib/action_view/template/resolver.rb
+++ b/actionview/lib/action_view/template/resolver.rb
@@ -3,7 +3,7 @@ require "active_support/core_ext/class"
 require "active_support/core_ext/module/attribute_accessors"
 require "action_view/template"
 require "thread"
-require "thread_safe"
+require "concurrent"
 
 module ActionView
   # = Action View Resolver
@@ -35,7 +35,7 @@ module ActionView
 
     # Threadsafe template cache
     class Cache #:nodoc:
-      class SmallCache < ThreadSafe::Cache
+      class SmallCache < Concurrent::Map
         def initialize(options = {})
           super(options.merge(:initial_capacity => 2))
         end