Class: Fluent::DeparserOutput

Inherits:
Output
  • Object
show all
Defined in:
lib/fluent/plugin/out_deparser.rb

Instance Method Summary collapse

Instance Method Details

#april_fool_emit(tag, es, chain) ⇒ Object


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# File 'lib/fluent/plugin/out_deparser.rb', line 12

def april_fool_emit(tag, es, chain)
  es.each {|time,record|
    keys = record.keys.shuffle
    new_record = {@key_name => keys.map{|k| record[k]}.join(' ')}
    Fluent::Engine.emit(@tag, time, new_record)
  }
  chain.next
end

#configure(conf) ⇒ Object


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# File 'lib/fluent/plugin/out_deparser.rb', line 26

def configure(conf)
  if conf['tag'] == 'april.fool'
    conf['format'] = '%s'
    conf['format_key_names'] = 'x'
  end

  super

  if @tag == 'april.fool'
    m = method(:april_fool_emit)
    (class << self; self; end).module_eval do
      define_method(:emit, m)
    end
    return
  end

  if not @tag and not @remove_prefix and not @add_prefix
    raise Fluent::ConfigError, "missing both of remove_prefix and add_prefix"
  end
  if @tag and (@remove_prefix or @add_prefix)
    raise Fluent::ConfigError, "both of tag and remove_prefix/add_prefix must not be specified"
  end
  if @remove_prefix
    @removed_prefix_string = @remove_prefix + '.'
    @removed_length = @removed_prefix_string.length
  end
  if @add_prefix
    @added_prefix_string = @add_prefix + '.'
  end

  @format_key_names = @format_key_names.split(',')
  begin
    dummy = @format % (["x"] * @format_key_names.length)
  rescue ArgumentError
    raise Fluent::ConfigError, "mismatch between placeholder of format and format_key_names"
  end
end

#emit(tag, es, chain) ⇒ Object


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# File 'lib/fluent/plugin/out_deparser.rb', line 64

def emit(tag, es, chain)
  tag = if @tag
          @tag
        else
          if @remove_prefix and
              ( (tag.start_with?(@removed_prefix_string) and tag.length > @removed_length) or tag == @remove_prefix)
            tag = tag[@removed_length..-1]
          end 
          if @add_prefix 
            tag = if tag and tag.length > 0
                    @added_prefix_string + tag
                  else
                    @add_prefix
                  end
          end
          tag
        end
  if @reserve_data
    es.each {|time,record|
      record.update({@key_name => (@format % @format_key_names.map{|k| record[k]})})
      Fluent::Engine.emit(tag, time, record)
    }
  else
    es.each {|time,record|
      new_record = {@key_name => (@format % @format_key_names.map{|k| record[k]})}
      Fluent::Engine.emit(tag, time, new_record)
    }
  end
  chain.next
end