ActiveSupport::TaggedLogging

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.

Class Public methods

new(logger)

📝 Source code

# File activesupport/lib/active_support/tagged_logging.rb, line 61
    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

🔎 See on GitHub

Instance Public methods

flush()

📝 Source code

# File activesupport/lib/active_support/tagged_logging.rb, line 74
    def flush
      clear_tags!
      super if defined?(super)
    end

🔎 See on GitHub

tagged(*tags)

📝 Source code

# File activesupport/lib/active_support/tagged_logging.rb, line 70
    def tagged(*tags)
      formatter.tagged(*tags) { yield self }
    end

🔎 See on GitHub