Module: ActiveSupport::TaggedLogging

Defined in:
lib/active_support/tagged_logging.rb

Overview

Wraps any standard Logger object to provide tagging capabilities.

logger = ActiveSupport::TaggedLogging.new(Logger.new(STDOUT))
logger.tagged('BCX') { logger.info 'Stuff' }                            # Logs "[BCX] Stuff"
logger.tagged('BCX', "Jason") { logger.info 'Stuff' }                   # Logs "[BCX] [Jason] Stuff"
logger.tagged('BCX') { logger.tagged('Jason') { logger.info 'Stuff' } } # Logs "[BCX] [Jason] Stuff"

This is used by the default Rails.logger as configured by Railties to make it easy to stamp log lines with subdomains, request ids, and anything else to aid debugging of multi-user production applications.

Defined Under Namespace

Modules: Formatter

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.new(logger) ⇒ Object 



59
60
61
62
63
64
 
# File 'lib/active_support/tagged_logging.rb', line 59

def self.new(logger)
  # Ensure we set a default formatter so we aren't extending nil!
  logger.formatter ||= ActiveSupport::Logger::SimpleFormatter.new
  logger.formatter.extend Formatter
  logger.extend(self)
end

Instance Method Details

#flush ⇒ Object 



72
73
74
75
 
# File 'lib/active_support/tagged_logging.rb', line 72

def flush
  clear_tags!
  super if defined?(super)
end

#tagged(*tags) ⇒ Object 



68
69
70
 
# File 'lib/active_support/tagged_logging.rb', line 68

def tagged(*tags)
  formatter.tagged(*tags) { yield self }
end