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92 lines
3.1 KiB
92 lines
3.1 KiB
module Semantic
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# use the Zeitwerk autoloader to reattach_appender for development autoreloading feature
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class DevLoader
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def initialize(session_key)
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@session_key = session_key
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force_preload_module
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RailsSemanticLogger::ActionController::LogSubscriber.logger.level = :fatal # useful for remanent Rack::Log started
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once_and_reload do
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clear_subscribers(/\.action_controller$/)
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clear_subscribers(/\.action_view$/)
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append_ansi_formatter
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reset_subscribers
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register_log_subscriber
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end
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end
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private
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def once_and_reload(&)
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yield
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Rails.autoloaders.main.on_load('ApplicationController', &)
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end
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def force_preload_module
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self.class.module_parent.constants.each { |const| self.class.module_parent.const_get(const) }
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end
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def append_ansi_formatter
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SemanticLogger.clear_appenders!
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formatter = Semantic::AnsiFormatter.new
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SemanticLogger.add_appender(io: $stdout,
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formatter:,
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filter: ->(log) { !formatter.reject(log) })
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end
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def register_log_subscriber
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register_to_action_controller(:start_processing)
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register_to_action_controller(:process_action, :finish_processing)
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register_to_action_controller(:redirect_to)
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%i[send_file send_data halted_callback unpermitted_parameters send_stream write_fragment
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read_fragment expire_fragment exist_fragment?].each do |hook|
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register_to_action_controller(hook, :any_hook)
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end
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end
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def register_to_action_controller(hook, method = hook)
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@subscribers << ActiveSupport::Notifications.subscribe("#{hook}.action_controller") do |event|
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@log_subscriber.send(method, event)
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end
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end
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def subscriber_patterns(subscriber)
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subscriber.patterns.respond_to?(:keys) ? subscriber.patterns.keys : subscriber.patterns
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end
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def unattach(subscriber, pattern)
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subscriber_patterns(subscriber).each do |sub_pattern|
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ActiveSupport::Notifications.notifier.listeners_for(sub_pattern).each do |sub|
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next unless sub.instance_variable_get(:@delegate) == subscriber
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next unless pattern.match(sub_pattern)
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puts "FOUND subscriber=#{subscriber} for sub_pattern=#{sub_pattern} with logger #{subscriber.logger.name}"
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puts subscriber.class.module_parent.const_source_location(subscriber.class.to_s)&.first
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ActiveSupport::Notifications.unsubscribe(sub)
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end
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end
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ActiveSupport::LogSubscriber.subscribers.delete(subscriber)
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end
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# pattern could be either a string 'start_processing.action_controller' or a regex /\.action_controller$/
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def clear_subscribers(pattern)
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ActiveSupport::LogSubscriber.subscribers.each { |sub| unattach(sub, pattern) }
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end
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def reset_subscribers
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if defined?(@subscribers)
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@subscribers.each do |sub|
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ActiveSupport::Notifications.unsubscribe(sub)
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end
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@subscribers.clear
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else
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@subscribers = []
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end
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@log_subscriber = Semantic::LogSubscriber.new(@session_key)
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end
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end
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end
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