Class: Fluent::RetagOutput

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

Instance Method Summary collapse

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_retag.rb', line 8

def configure(conf)
  super
  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
end

#emit(tag, es, chain) ⇒ Object 



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# File 'lib/fluent/plugin/out_retag.rb', line 25

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
  es.each do |time,record|
    Fluent::Engine.emit(tag, time, record)
  end
  chain.next
end