Class: Fluent::Plugin::RewriteOutput

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#rewrite_rule ⇒ Object (readonly)

Returns the value of attribute rewrite_rule.



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# File 'lib/fluent/plugin/out_rewrite.rb', line 15

def rewrite_rule
  @rewrite_rule
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_rewrite.rb', line 17

def configure(conf)
  require 'fluent/plugin/rewrite_rule'

  super

  if @remove_prefix
    @removed_prefix_string = @remove_prefix + '.'
    @removed_length = @removed_prefix_string.length
  end
  if @add_prefix
    @added_prefix_string = @add_prefix + '.'
  end

  @rewrite_rule = Fluent::RewriteRule.new(self, conf)
end

#process(tag, es) ⇒ Object 



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# File 'lib/fluent/plugin/out_rewrite.rb', line 33

def process(tag, es)
  _tag = tag.clone

  if @remove_prefix and
    ((tag.start_with?(@removed_prefix_string) && tag.length > @removed_length) || tag == @remove_prefix)
    tag = tag[@removed_length..-1] || ''
  end

  if @add_prefix
    tag = tag && tag.length > 0 ? @added_prefix_string + tag : @add_prefix
  end

  es.each do |time, record|
    filtered_tag, record = @rewrite_rule.rewrite(tag, record)
    if filtered_tag && record && _tag != filtered_tag
      router.emit(filtered_tag, time, record)
    else
      if @enable_warnings
        $log.warn "Can not emit message because the tag(#{tag}) has not changed. Dropped record #{record}"
      end
    end
  end
end