Class: Incline::JsonLogFormatter

Inherits:
Logger::Formatter
  • Object
show all
Defined in:
lib/incline/json_log_formatter.rb

Overview

A log formatter that writes entries in JSON format (each line is a valid JSON object).

Constant Summary collapse

AUTO_DEBUG_PATTERNS =

Regular expressions used to auto-classify any matching message as a debug message.

[
    /^rendered\s/i,
    /started\sget\s"\/assets/i
]

Instance Method Summary collapse

Instance Method Details

#call(sev, time, _, msg) ⇒ Object

Overrides the default formatter behavior to log a JSON line.



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# File 'lib/incline/json_log_formatter.rb', line 17

def call(sev, time, _, msg) #:nodoc:
  level = ({
      Logger::DEBUG   => 'DEBUG',
      Logger::INFO    => 'INFO',
      Logger::WARN    => 'WARN',
      Logger::ERROR   => 'ERROR',
      Logger::FATAL   => 'FATAL',
  }[sev] || sev.to_s).upcase

  if msg.present? && AUTO_DEBUG_PATTERNS.find{|pattern| msg =~ pattern}
    return '' if debug_skip?
    level = 'DEBUG'
  end

  if msg.present?
    # And we'll expand exceptions so we get as much info as possible.
    # If you just want the message, make sure you just pass the message.
    if msg.is_a?(::Exception)
      msg = "#{msg.message} (#{msg.class})\n#{(msg.backtrace || []).join("\n")}"
    elsif !msg.is_a?(::String)
      msg = msg.inspect
    end

    msg = rm_fmt msg

    {
        level: level,
        time: time.strftime('%Y-%m-%d %H:%M:%S'),
        message: msg,
        app_name: app_name,
        app_version: app_version,
        process_id: Process.pid,
    }.to_json + "\r\n"
  else
    ''
  end
end