Class: Fluent::RemoveEmptyOutput

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

Defined Under Namespace

Classes: PlaceholderExpander, RubyPlaceholderExpander

Constant Summary collapse

BUILTIN_CONFIGURATIONS = 
%W(type tag)

Instance Method Summary collapse

Constructor Details

#initialize ⇒ RemoveEmptyOutput

Returns a new instance of RemoveEmptyOutput.



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

def initialize
  super
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_remove_empty.rb', line 21

def configure(conf)
  super

  @map = {}
  conf.each_pair { |k, v|
    next if BUILTIN_CONFIGURATIONS.include?(k)
    conf.has_key?(k) # to suppress unread configuration warning
    @map[k] = v
  }

  if @tag.nil?
    raise Fluent::ConfigError, "out_remove_empty: `tag` must be specified"
  end
  
  @placeholder_expander =
  if @enable_ruby
      # require utilities which would be used in ruby placeholders
      require 'pathname'
      require 'uri'
      require 'cgi'
      RubyPlaceholderExpander.new(log)
      else
      PlaceholderExpander.new(log)
  end
  
  @hostname = Socket.gethostname
end

#emit(tag, es, chain) ⇒ Object 



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# File 'lib/fluent/plugin/out_remove_empty.rb', line 49

def emit(tag, es, chain)
  tag_parts = tag.split('.')
  tag_prefix = tag_prefix(tag_parts)
  tag_suffix = tag_suffix(tag_parts)
  placeholders = {
    'tag' => tag,
    'tags' => tag_parts,
    'tag_parts' => tag_parts,
    'tag_prefix' => tag_prefix,
    'tag_suffix' => tag_suffix,
    'hostname' => @hostname,
  }
  last_record = nil
  es.each {|time, record|
    last_record = record # for debug log
    new_tag, new_record = reform(@tag, time, record, placeholders)
    Engine.emit(new_tag, time, new_record)
  }
  chain.next
rescue => e
  log.warn "remove_empty: #{e.class} #{e.message} #{e.backtrace.first}"
  log.debug "remove_empty: tag:#{@tag} map:#{@map} record:#{last_record} placeholders:#{placeholders}"
end