works but suboptimal due to remanent log_subscribers

app/controllers/scores_controller.rb

@@ -5,7 +5,7 @@ class ScoresController < ApplicationController
   before_action :set_score, only: %i[show edit update destroy]
 
   def index
-    logger.info('inside controller')
+    logger.info('inside controller22')
     @q = Score.all.ransack(q_params)
     @pagy, @scores = pagy(@q.result)
   end

config/environments/development.rb

@@ -89,7 +89,7 @@ Rails.application.configure do # rubocop:disable Metrics/BlockLength
     end
   elsif Rails.application.server?
     config.after_initialize do
-      Semantic::DevLoader.new('toto1')
+      config.dev_loader = Semantic::DevLoader.new('toto1')
     end
   end
 end

config/initializers/hot_changes.rb

@@ -2,5 +2,8 @@ return unless Rails.application.server?
 
 Rails.application.config.after_initialize do
   Hot::Constants.on_change(:log_active_record) { |bool| ActiveRecord::Base.logger.level = bool ? :debug : :fatal }
-  Hot::Constants.on_change(:log_action_view) { |bool| ActionView::Base.logger.level = bool ? :debug : :fatal }
+  Hot::Constants.on_change(:log_action_view) do |bool|
+    ActionView::Base.logger.level = bool ? :debug : :fatal
+    Rails.application.config.dev_loader.launch
+  end
 end

lib/semantic/dev_loader.rb

@@ -3,15 +3,21 @@ module Semantic
   class DevLoader
     def initialize(session_key)
       @session_key = session_key
+      @subscribers = {}
 
       RailsSemanticLogger::ActionController::LogSubscriber.logger.level = :fatal # useful for remanent Rack::Log started
 
+      launch
+    end
+
+    def launch
       once_and_reload do
+        append_ansi_formatter
+
         Semantic::NotificationUtil.clear_subscribers(/\.action_controller$/)
         Semantic::NotificationUtil.clear_subscribers(/\.action_view$/)
-
-        append_ansi_formatter
         reset_subscribers
+
         register_action_controller
         register_action_view
       end
@@ -51,17 +57,19 @@ module Semantic
     end
 
     def register_hook(sub_instance, hook, method = hook)
-      @subscribers << ActiveSupport::Notifications.subscribe("#{hook}.#{sub_instance.event_group}") do |event|
+      @subscribers[sub_instance.class] ||= []
+      @subscribers[sub_instance.class] << ActiveSupport::Notifications.subscribe("#{hook}.#{sub_instance.event_group}") do |event|
         sub_instance.send(method, event)
       end
     end
 
     def reset_subscribers
-      if defined?(@subscribers)
-        @subscribers.each { |sub| ActiveSupport::Notifications.unsubscribe(sub) }
-        @subscribers.clear
-      else
-        @subscribers = []
+      return if @subscribers.empty?
+
+      @subscribers.each_pair do |clazz, subs|
+        # puts "reset #{subs.size} subscribers for class <#{clazz}>"
+        subs.each { |sub| ActiveSupport::Notifications.unsubscribe(sub) }
+        subs.clear
       end
     end
   end

lib/semantic/subscribers/action_view.rb

@@ -7,22 +7,23 @@ module Semantic
 
       def initialize
         super(:action_view)
+        logger.level = Hot::Constants.log_action_view ? :debug : :fatal
       end
 
       def render_partial(event)
-        # logger.info('Rendered partial')
+        # logger.info {'Rendered partial'}
       end
 
       def render_template(event)
-        logger.debug('Rendered template')
+        logger.debug { 'Rendered template' }
       end
 
       def render_collection(event)
-        logger.debug('Rendered collection')
+        logger.debug { 'Rendered collection' }
       end
 
       def render_layout(event)
-        logger.debug('Rendered layout')
+        logger.debug { 'Rendered layout' }
       end
     end
   end