Add AbstractContext#default_executor

to be able to override executor class wide

Author: pitr-ch

lib/concurrent/actor/context.rb

@@ -77,6 +77,12 @@ def default_reference_class
         Reference
       end
 
+      # override to se different default executor, e.g. to change it to global_operation_pool
+      # @return [Executor]
+      def default_executor
+        Concurrent.configuration.global_task_pool
+      end
+
       # tell self a message
       def tell(message)
         reference.tell message

lib/concurrent/actor/core.rb

@@ -55,7 +55,7 @@ def initialize(opts = {}, &block)
           @context_class = Child! opts.fetch(:class), AbstractContext
           allocate_context
 
-          @executor = Type! opts.fetch(:executor, Concurrent.configuration.global_task_pool), Executor
+          @executor = Type! opts.fetch(:executor, @context.default_executor), Executor
           raise ArgumentError, 'ImmediateExecutor is not supported' if @executor.is_a? ImmediateExecutor
 
           @reference = (Child! opts[:reference_class] || @context.default_reference_class, Reference).new self