Module: ActiveSupport::TaggedLogging

Defined in:
activesupport/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 



58
59
60
61
62
63
 
# File 'activesupport/lib/active_support/tagged_logging.rb', line 58

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 



71
72
73
74
 
# File 'activesupport/lib/active_support/tagged_logging.rb', line 71

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

#tagged(*tags) ⇒ Object 



67
68
69
 
# File 'activesupport/lib/active_support/tagged_logging.rb', line 67

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