module Fluent module TextFormatter class SprintfFormatter < Formatter Plugin.register_formatter('sprintf', self) include Configurable include HandleTagAndTimeMixin config_param :sprintf_format, :string config_param :sprintf_blank_string, :string, :default => nil config_param :sprintf_blank_record_format, :string, :default => nil def initialize super end def configure(conf) super @time_format = @time_format || '%Y-%m-%d %H:%M:%S' r = /\$\{([^}]+)\}/ @keys = @sprintf_format.scan(r).map{ |key| key.first } @sprintf_format = @sprintf_format.gsub(/\$\{([^}]+)\}/, '%s') if @sprintf_blank_record_format @sprintf_blank_record_keys = @sprintf_blank_record_format.scan(r).map{ |key| key.first } @sprintf_blank_record_format = @sprintf_blank_record_format.gsub(/\$\{([^}]+)\}/, '%s') end begin @sprintf_format % @keys rescue ArgumentError => e raise Fluent::ConfigError, "formatter_sprintf: @sprintf_format is can't include '%'" end end def format(tag, time, record) if record.empty? && @sprintf_blank_record_format return @sprintf_blank_record_format % get_values(@sprintf_blank_record_keys, tag, time, record) end @sprintf_format % get_values(@keys, tag, time, record) end def get_values(keys, tag, time, record) keys.map{ |key| if key == 'tag' tag elsif key == 'time' Time.at(time).strftime(@time_format) else (record[key].nil? || record[key].empty?) ? @sprintf_blank_string : record[key] end } end end end end