Module: Fluent::PluginHelper::CompatParameters

Defined in:
lib/fluent/plugin_helper/compat_parameters.rb

Constant Summary collapse

BUFFER_PARAMS =

This plugin helper is to bring old-fashioned buffer/other configuration parameters to v0.14 plugin API configurations. This helper is mainly to convert plugins from v0.12 API to v0.14 API safely, without breaking user deployment.

{
  "buffer_type" => "@type",
  "buffer_path" => "path",
  "num_threads"                 => "flush_thread_count",
  "flush_interval"              => "flush_interval",
  "try_flush_interval"          => "flush_thread_interval",
  "queued_chunk_flush_interval" => "flush_thread_burst_interval",
  "disable_retry_limit" => "retry_forever",
  "retry_limit"         => "retry_max_times",
  "max_retry_wait"      => "retry_max_interval",
  "buffer_chunk_limit"  => "chunk_limit_size",
  "buffer_queue_limit"  => "queue_length_limit",
  "buffer_queue_full_action" => "overflow_action",
  "flush_at_shutdown" => "flush_at_shutdown",
}
BUFFER_TIME_SLICED_PARAMS = 
{
  "time_slice_format" => nil,
  "time_slice_wait" => "timekey_wait",
}
PARSER_PARAMS = 
{
  "format" => "@type",
  "time_key"    => "time_key",
  "time_format" => "time_format",
  "delimiter"   => "delimiter",
  "json_parser"      => "json_parser", # JSONParser
  "label_delimiter"  => "label_delimiter", # LabeledTSVParser
  "format_firstline" => "format_firstline", # MultilineParser
  "message_key"      => "message_key", # NoneParser
  "with_priority"    => "with_priority", # SyslogParser
}
INJECT_PARAMS = 
{
  "include_time_key" => nil,
  "time_key"      => "time_key",
  "time_format"   => "time_format",
  "timezone"      => "timezone",
  "include_tag_key" => nil,
  "tag_key" => "tag_key",
  "localtime" => nil,
  "utc" => nil,
}
FORMATTER_PARAMS = 
{
  "format" => "@type",
  "delimiter" => "delimiter",
  "force_quotes" => "force_quotes", # CsvFormatter
  "fields" => "fields", # CsvFormatter
  "json_parser" => "json_parser", # JSONFormatter
  "label_delimiter" => "label_delimiter", # LabeledTSVFormatter
  "output_time" => "output_time", # OutFileFormatter
  "output_tag"  => "output_tag", # OutFileFormatter
  "message_key" => "message_key", # SingleValueFormatter
  "add_newline" => "add_newline", # SingleValueFormatter
  "output_type" => "output_type", # StdoutFormatter
}

Instance Method Summary collapse

Instance Method Details

#compat_parameters_buffer(conf, default_chunk_key: '') ⇒ Object 



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# File 'lib/fluent/plugin_helper/compat_parameters.rb', line 105

def compat_parameters_buffer(conf, default_chunk_key: '')
  # return immediately if <buffer> section exists, or any buffer-related parameters don't exist
  return unless conf.elements('buffer').empty?
  return if (BUFFER_PARAMS.keys + BUFFER_TIME_SLICED_PARAMS.keys).all?{|k| !conf.has_key?(k) }

  # TODO: warn obsolete parameters if these are deprecated
  buffer_params = BUFFER_PARAMS.merge(BUFFER_TIME_SLICED_PARAMS)
  attr = compat_parameters_copy_to_subsection_attributes(conf, buffer_params) do |compat_key, value|
    if compat_key == 'buffer_queue_full_action' && value == 'exception'
      'throw_exception'
    else
      value
    end
  end

  chunk_key = default_chunk_key

  if conf.has_key?('time_slice_format')
    chunk_key = 'time'
    attr['timekey'] = case conf['time_slice_format']
                      when /\%S/ then 1
                      when /\%M/ then 60
                      when /\%H/ then 3600
                      when /\%d/ then 86400
                      else
                        raise Fluent::ConfigError, "time_slice_format only with %Y or %m is too long"
                      end
  else
    if chunk_key == 'time'
      attr['timekey'] = 86400 # TimeSliceOutput.time_slice_format default value is '%Y%m%d'
    end
  end

  e = Fluent::Config::Element.new('buffer', chunk_key, attr, [])
  conf.elements << e

  conf
end

#compat_parameters_convert(conf, *types, **kwargs) ⇒ Object 



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# File 'lib/fluent/plugin_helper/compat_parameters.rb', line 86

def compat_parameters_convert(conf, *types, **kwargs)
  types.each do |type|
    case type
    when :buffer
      compat_parameters_buffer(conf, **kwargs)
    when :inject
      compat_parameters_inject(conf)
    when :parser
      compat_parameters_parser(conf)
    when :formatter
      compat_parameters_formatter(conf)
    else
      raise "BUG: unknown compat_parameters type: #{type}"
    end
  end

  conf
end

#compat_parameters_copy_to_subsection_attributes(conf, params, &block) ⇒ Object 



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# File 'lib/fluent/plugin_helper/compat_parameters.rb', line 208

def compat_parameters_copy_to_subsection_attributes(conf, params, &block)
  attr = {}
  params.each do |compat, current|
    next unless current
    if conf.has_key?(compat)
      if block_given?
        attr[current] = block.call(compat, conf[compat])
      else
        attr[current] = conf[compat]
      end
    end
  end
  attr
end

#compat_parameters_formatter(conf) ⇒ Object 



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# File 'lib/fluent/plugin_helper/compat_parameters.rb', line 195

def compat_parameters_formatter(conf)
  return unless conf.elements('format').empty?
  return if FORMATTER_PARAMS.keys.all?{|k| !conf.has_key?(k) }

  # TODO: warn obsolete parameters if these are deprecated
  attr = compat_parameters_copy_to_subsection_attributes(conf, FORMATTER_PARAMS)

  e = Fluent::Config::Element.new('format', '', attr, [])
  conf.elements << e

  conf
end

#compat_parameters_inject(conf) ⇒ Object 



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# File 'lib/fluent/plugin_helper/compat_parameters.rb', line 144

def compat_parameters_inject(conf)
  return unless conf.elements('inject').empty?
  return if INJECT_PARAMS.keys.all?{|k| !conf.has_key?(k) }

  # TODO: warn obsolete parameters if these are deprecated
  attr = compat_parameters_copy_to_subsection_attributes(conf, INJECT_PARAMS)

  if conf.has_key?('include_time_key') && Fluent::Config.bool_value(conf['include_time_key'])
    attr['time_key'] ||= 'time'
    attr['time_type'] ||= 'string'
  end
  if conf.has_key?('time_as_epoch') && Fluent::Config.bool_value(conf['time_as_epoch'])
    attr['time_type'] = 'unixtime'
  end
  if conf.has_key?('localtime') || conf.has_key?('utc')
    if conf.has_key?('localtime') && conf.has_key?('utc')
      raise Fluent::ConfigError, "both of utc and localtime are specified, use only one of them"
    elsif conf.has_key?('localtime')
      attr['localtime'] = Fluent::Config.bool_value(conf['localtime'])
    elsif conf.has_key?('utc')
      attr['localtime'] = !(Fluent::Config.bool_value(conf['utc']))
      # Specifying "localtime false" means using UTC in TimeFormatter
      # And specifying "utc" is different from specifying "timezone +0000"(it's not always UTC).
      # There are difference between "Z" and "+0000" in timezone formatting.
      # TODO: add kwargs to TimeFormatter to specify "using localtime", "using UTC" or "using specified timezone" in more explicit way
    end
  end

  if conf.has_key?('include_tag_key') && Fluent::Config.bool_value(conf['include_tag_key'])
    attr['tag_key'] ||= 'tag'
  end

  e = Fluent::Config::Element.new('inject', '', attr, [])
  conf.elements << e

  conf
end

#compat_parameters_parser(conf) ⇒ Object 



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# File 'lib/fluent/plugin_helper/compat_parameters.rb', line 182

def compat_parameters_parser(conf)
  return unless conf.elements('parse').empty?
  return if PARSER_PARAMS.keys.all?{|k| !conf.has_key?(k) }

  # TODO: warn obsolete parameters if these are deprecated
  attr = compat_parameters_copy_to_subsection_attributes(conf, PARSER_PARAMS)

  e = Fluent::Config::Element.new('parse', '', attr, [])
  conf.elements << e

  conf
end