Class: Fluent::Plugin::FilterSplitFilter

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

Instance Method Summary collapse

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/filter_filter_split.rb', line 37

def configure(conf)
  super
  if !@keep_keys.empty? && !@remove_keys.empty?
    raise Fluent::ConfigError, 'Cannot set both keep_keys and remove_keys.'
  end
  if @keep_other_key && !@keep_keys.empty?
    raise Fluent::ConfigError, 'Cannot set keep_keys when keep_other_key is true.'
  end
  if !@keep_other_key && !@remove_keys.empty?
    raise Fluent::ConfigError, 'Cannot set remove_keys when keep_other_key is false.'
  end
end

#filter_stream(tag, es) ⇒ Object 



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# File 'lib/fluent/plugin/filter_filter_split.rb', line 50

def filter_stream(tag, es)
  new_es = Fluent::MultiEventStream.new
  es.each do |time, record|
    begin
      unless record.key?(@split_key)
        new_es.add(time, record)
        next
      end

      keyvalues = if @keep_other_key
                    other_keyvalues(record)
                  else
                    remained_keyvalues(record)
                  end

      unless record[@split_key].is_a?(Array)
        new_es.add(time, record)
        log.warn "failed to split with <#{@split_key}> key because the target field is not Array: <#{record[@split_key]}>."
        next
      end

      record[@split_key].each do |v|
        unless keyvalues.empty?
          if v.is_a?(Hash)
            v.merge!(keyvalues)
          else
            v = {"#{@split_key}": v}.merge(keyvalues)
          end
        else
          unless v.is_a?(Hash)
            v = {"#{@split_key}" => v}
          end
        end
        new_es.add(time, v)
      end
    rescue => e
      router.emit_error_event(tag, time, record, e)            
      log.warn "failed to split with <#{@split_key} key." , error: e
    end
  end
  new_es
end