Contents

# vim:fileencoding=utf-8

require 'mono_logger'

module ResqueScheduler
  # Just builds a logger, with specified verbosity and destination.
  # The simplest example:
  #
  #   ResqueScheduler::LoggerBuilder.new.build
  class LoggerBuilder
    # Initializes new instance of the builder
    #
    # Pass :opts Hash with
    #   - :mute if logger needs to be silent for all levels. Default - false
    #   - :verbose if there is a need in debug messages. Default - false
    #   - :log_dev to output logs into a desired file. Default - STDOUT
    #   - :format log format, either 'text' or 'json'. Default - 'text'
    #
    # Example:
    #
    #   LoggerBuilder.new(
    #     :mute => false, :verbose => true, :log_dev => 'log/scheduler.log'
    #   )
    def initialize(opts={})
      @muted = !!opts[:mute]
      @verbose = !!opts[:verbose]
      @log_dev = opts[:log_dev] || $stdout
      @format = opts[:format] || 'text'
    end

    # Returns an instance of MonoLogger
    def build
      logger = MonoLogger.new(@log_dev)
      logger.level = level
      logger.formatter = send(:"#{@format}_formatter")
      logger
    end

    private

    def level
      if @verbose && !@muted
        MonoLogger::DEBUG
      elsif !@muted
        MonoLogger::INFO
      else
        MonoLogger::FATAL
      end
    end

    def text_formatter
      proc do |severity, datetime, progname, msg|
        "resque-scheduler: [#{severity}] #{datetime.iso8601}: #{msg}\n"
      end
    end

    def json_formatter
      proc do |severity, datetime, progname, msg|
        require 'json'
        JSON.dump(
          {
            :name => 'resque-scheduler',
            :progname => progname,
            :level => severity,
            :timestamp => datetime.iso8601,
            :msg => msg
          }
        ) + "\n"
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
resque-scheduler-2.5.5	lib/resque_scheduler/logger_builder.rb