Module: Uberinstaller::Loggable

Included in:
Commander, Exception::Exception, Installer, PackageManager::Base, Parser, Platform, Runner
Defined in:
lib/uberinstaller/logger.rb

Overview

Handle application log

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Class Attribute Details

.level ⇒ Object

Log output level. Can be one of Logger::DEBUG, Logger::INFO, Logger::WARN, Logger::ERROR ( default Logger::ERROR )



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# File 'lib/uberinstaller/logger.rb', line 35

def level
  @level
end

.log_path ⇒ Object

Path in which log files are saved ( default STDOUT )



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# File 'lib/uberinstaller/logger.rb', line 35

attr_accessor :level, :log_path

Class Method Details

.configure_logger_for(classname) ⇒ Object

Create and configure a logger for the specified Class

Parameters:

  • classname (String) —

    the name of the class for which a logger instance must be retrieved

Returns:

  • (Object) —

    the instance of the logger class for the specified Class



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# File 'lib/uberinstaller/logger.rb', line 49

def configure_logger_for(classname)
  # handle case in which log path does not exists
  begin
    logger = Logger.new(@log_path)
  rescue Errno::ENOENT
    FileUtils.mkdir_p File.dirname @log_path
    retry
  end

  logger.progname = classname
  logger.level = @level
  logger.formatter = proc { |severity, datetime, progname, msg|
    case severity
    when 'DEBUG'
      spaciator = "    *"
      after_space = ""
      colored = "white"
      extra = ""
    when 'INFO'
      spaciator = "   **"
      after_space = " "
      colored = ""
      extra = ""
    when 'WARN'
      spaciator = "  ***"
      after_space = " "
      colored = "yellow"
      extra = ""
    when 'ERROR'
      spaciator = " ****"
      after_space = ""
      colored = "red"
      extra = ""
    when 'FATAL'
      spaciator = "*****"
      after_space = ""
      colored = "red"
      extra = "bold"
    else
      spaciator = "     "
      after_space = ""
      colored = ""
      extra = ""
    end

    formatted_output = " #{spaciator} [#{severity}]#{after_space} [#{datetime}] -- #{msg} { #{progname} }\n"
    if @log_path == STDOUT or @log_path == STDERR
      if colored.empty? 
        formatted_output
      else
        if extra.empty?
          formatted_output.send(colored)
        else
          formatted_output.send(colored).send(extra)
        end
      end
    else
      formatted_output
    end
  }
  logger
end

.logger_for(classname) ⇒ Object

Return the logger for a specific Class. If the instance is not found, creates it.

Parameters:

  • classname (String) —

    the name of the class for which a logger instance must be retrieved

Returns:

  • (Object) —

    the instance of the logger class for the specified Class



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# File 'lib/uberinstaller/logger.rb', line 41

def logger_for(classname)
  @loggers[classname] ||= configure_logger_for(classname)
end

Instance Method Details

#logger ⇒ Object

Global, memoized, lazy initialized instance of a logger

This is the magical bit that gets mixed into your classes. Respond to Logger function.

Returns:

  • (Object) —

    an instance of the logger class



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# File 'lib/uberinstaller/logger.rb', line 25

def logger
  classname = (self.is_a? Module) ? self : self.class.name
  @logger ||= Loggable.logger_for(classname)
end