Module: Fluent::Mixin::RewriteTagName

Includes:
RecordFilterMixin
Defined in:
lib/fluent/mixin/rewrite_tag_name.rb

Defined Under Namespace

Classes: PlaceholderExpander

Constant Summary collapse

DEFAULT_HOSTNAME_COMMAND = 
'hostname'

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#hostname_command ⇒ Object

Returns the value of attribute hostname_command.



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# File 'lib/fluent/mixin/rewrite_tag_name.rb', line 5

def hostname_command
  @hostname_command
end

#tag ⇒ Object

Returns the value of attribute tag.



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# File 'lib/fluent/mixin/rewrite_tag_name.rb', line 5

def tag
  @tag
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/mixin/rewrite_tag_name.rb', line 9

def configure(conf)
  super

  @placeholder_expander = PlaceholderExpander.new
  hostname_command = @hostname_command || DEFAULT_HOSTNAME_COMMAND
  hostname = `#{hostname_command}`.chomp
  @placeholder_expander.set_hostname(hostname)
end

#filter_record(tag, time, record) ⇒ Object 



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# File 'lib/fluent/mixin/rewrite_tag_name.rb', line 18

def filter_record(tag, time, record)
  super
  if @tag
    rewrite_tag!(tag)
  end
end

#rewrite_tag!(tag) ⇒ Object 



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# File 'lib/fluent/mixin/rewrite_tag_name.rb', line 25

def rewrite_tag!(tag)
  @placeholder_expander.set_tag(tag)
  emit_tag = @placeholder_expander.expand(@tag)
  tag.sub!(tag, emit_tag)
end