mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
731d4392e4
More work still needs to be done on some of these names (render_template.action_view and render_template!.action_view particularly) but this allows (for example) /^sql/ to subscribe to all the various ORMs without further modification Signed-off-by: José Valim <jose.valim@gmail.com>
108 lines
3.5 KiB
Ruby
108 lines
3.5 KiB
Ruby
require 'active_support/core_ext/class/inheritable_attributes'
|
|
require 'active_support/notifications'
|
|
|
|
module Rails
|
|
# Rails::LogSubscriber is an object set to consume ActiveSupport::Notifications
|
|
# on initialization with solely purpose of logging. The log subscriber dispatches
|
|
# notifications to a regirested object based on its given namespace.
|
|
#
|
|
# An example would be ActiveRecord log subscriber responsible for logging queries:
|
|
#
|
|
# module ActiveRecord
|
|
# class Railtie
|
|
# class LogSubscriber < Rails::LogSubscriber
|
|
# def sql(event)
|
|
# "#{event.payload[:name]} (#{event.duration}) #{event.payload[:sql]}"
|
|
# end
|
|
# end
|
|
# end
|
|
# end
|
|
#
|
|
# It's finally registed as:
|
|
#
|
|
# Rails::LogSubscriber.add :active_record, ActiveRecord::Railtie::LogSubscriber.new
|
|
#
|
|
# So whenever a "sql.active_record" notification arrive to Rails::LogSubscriber,
|
|
# it will properly dispatch the event (ActiveSupport::Notifications::Event) to
|
|
# the sql method.
|
|
#
|
|
# This is useful because it avoids spanning several log subscribers just for logging
|
|
# purposes(which slows down the main thread). Besides of providing a centralized
|
|
# facility on top of Rails.logger.
|
|
#
|
|
# Log subscriber also has some helpers to deal with logging and automatically flushes
|
|
# all logs when the request finishes (via action_dispatch.callback notification).
|
|
class LogSubscriber
|
|
mattr_accessor :colorize_logging
|
|
self.colorize_logging = true
|
|
|
|
# Embed in a String to clear all previous ANSI sequences.
|
|
CLEAR = "\e[0m"
|
|
BOLD = "\e[1m"
|
|
|
|
# Colors
|
|
BLACK = "\e[30m"
|
|
RED = "\e[31m"
|
|
GREEN = "\e[32m"
|
|
YELLOW = "\e[33m"
|
|
BLUE = "\e[34m"
|
|
MAGENTA = "\e[35m"
|
|
CYAN = "\e[36m"
|
|
WHITE = "\e[37m"
|
|
|
|
def self.add(namespace, log_subscriber, notifier = ActiveSupport::Notifications)
|
|
log_subscribers << log_subscriber
|
|
|
|
log_subscriber.public_methods(false).each do |event|
|
|
notifier.subscribe("#{event}.#{namespace}") do |*args|
|
|
next if log_subscriber.logger.nil?
|
|
|
|
begin
|
|
log_subscriber.send(event, ActiveSupport::Notifications::Event.new(*args))
|
|
rescue Exception => e
|
|
Rails.logger.error "Could not log #{args[0].inspect} event. #{e.class}: #{e.message}"
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def self.log_subscribers
|
|
@log_subscribers ||= []
|
|
end
|
|
|
|
# Flush all log_subscribers' logger.
|
|
def self.flush_all!
|
|
loggers = log_subscribers.map(&:logger)
|
|
loggers.uniq!
|
|
loggers.each { |l| l.flush if l.respond_to?(:flush) }
|
|
end
|
|
|
|
# By default, we use the Rails.logger for logging.
|
|
def logger
|
|
Rails.logger
|
|
end
|
|
|
|
protected
|
|
|
|
%w(info debug warn error fatal unknown).each do |level|
|
|
class_eval <<-METHOD, __FILE__, __LINE__ + 1
|
|
def #{level}(*args, &block)
|
|
return unless logger
|
|
logger.#{level}(*args, &block)
|
|
end
|
|
METHOD
|
|
end
|
|
|
|
# Set color by using a string or one of the defined constants. If a third
|
|
# option is set to true, it also adds bold to the string. This is based
|
|
# on Highline implementation and it automatically appends CLEAR to the end
|
|
# of the returned String.
|
|
#
|
|
def color(text, color, bold=false)
|
|
return text unless colorize_logging
|
|
color = self.class.const_get(color.to_s.upcase) if color.is_a?(Symbol)
|
|
bold = bold ? BOLD : ""
|
|
"#{bold}#{color}#{text}#{CLEAR}"
|
|
end
|
|
end
|
|
end
|