Class: Fluent::BurrowFilter

Inherits:
Filter
  • Object
show all
Defined in:
lib/fluent/plugin/filter_burrow.rb

Instance Method Summary collapse

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/filter_burrow.rb', line 30

def configure(conf)
  super

  # Validate action
  actions = ['replace','overlay','inplace','prefix']
  if not actions.include? @action
    raise Fluent::ConfigError, "Invalid 'action', must be one of #{actions.join(',')}"
  end

  # Validate action-based restrictions
  if @action == 'inplace' and @keep_key
    raise Fluent::ConfigError, "Specifying 'keep_key' with action 'inplace' is not supported"
  end
  if @action == 'prefix' and not @data_prefix
    raise Fluent::ConfigError, "You must specify 'data_prefix' with action 'prefix'"
  end

  # Prepare fluent's built-in parser
  @parser = Fluent::Plugin.new_parser(@format)
  @parser.configure(conf) if @parser.respond_to?(:configure)
end

#filter(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/filter_burrow.rb', line 63

def filter(tag, time, record)
  raw_value = record[@key_name]
  if raw_value then
    new_time, new_values = nil, nil
    @parser.parse(raw_value) do |parsed_time, parsed_values|
      new_time   = parsed_time
      new_values = parsed_values
    end

    if new_values then
      original_time = record[@record_time_key]
      new_time ||= original_time

      # Overlay new record on top of original record?
      new_record = case @action
      when 'inplace'
        record.merge({@key_name => new_values})
      when 'overlay'
        record.merge(new_values)
      when 'replace'
        new_values
      when 'prefix'
        record.merge({@data_prefix => new_values})
      end

      # Keep the key?
      if ['overlay','replace','prefix'].include? @action
        if not @keep_key and new_record.has_key?(@key_name)
          new_record.delete(@key_name)
        end
      end

      # Preserve 'time' key?
      if @keep_time
        new_record[@record_time_key] = original_time
      end

      new_record
    end
  end
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/filter_burrow.rb', line 58

def shutdown
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/filter_burrow.rb', line 53

def start
  super
end