Class: Fluent::Config::Element

Inherits:
Hash
  • Object
show all
Defined in:
lib/fluent/config/element.rb

Constant Summary collapse

RESERVED_PARAMETERS_COMPAT = 
{
  '@type' => 'type',
  '@id' => 'id',
  '@log_level' => 'log_level',
  '@label' => nil,
}
RESERVED_PARAMETERS = 
RESERVED_PARAMETERS_COMPAT.keys

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, arg, attrs, elements, unused = nil) ⇒ Element

Returns a new instance of Element.



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# File 'lib/fluent/config/element.rb', line 23

def initialize(name, arg, attrs, elements, unused = nil)
  @name = name
  @arg = arg
  @elements = elements
  super()
  attrs.each { |k, v|
    self[k] = v
  }
  @unused = unused || attrs.keys
  @v1_config = false
  @corresponding_proxies = [] # some plugins use flat parameters, e.g. in_http doesn't provide <format> section for parser.
  @unused_in = false # if this element is not used in plugins, correspoing plugin name and parent element name is set, e.g. [source, plugin class].

  # it's global logger, not plugin logger: deprecated message should be global warning, not plugin level.
  @logger = defined?($log) ? $log : nil
end

Instance Attribute Details

#arg ⇒ Object

Returns the value of attribute arg.



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# File 'lib/fluent/config/element.rb', line 40

def arg
  @arg
end

#corresponding_proxies ⇒ Object

Returns the value of attribute corresponding_proxies.



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# File 'lib/fluent/config/element.rb', line 40

def corresponding_proxies
  @corresponding_proxies
end

#elements(*names, name: nil, arg: nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/fluent/config/element.rb', line 51

def elements(*names, name: nil, arg: nil)
  raise ArgumentError, "name and names are exclusive" if name && !names.empty?
  raise ArgumentError, "arg is available only with name" if arg && !name

  if name
    @elements.select{|e| e.name == name && (!arg || e.arg == arg) }
  elsif !names.empty?
    @elements.select{|e| names.include?(e.name) }
  else
    @elements
  end
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/fluent/config/element.rb', line 40

def name
  @name
end

#unused ⇒ Object

Returns the value of attribute unused.



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# File 'lib/fluent/config/element.rb', line 40

def unused
  @unused
end

#unused_in ⇒ Object

Returns the value of attribute unused_in.



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# File 'lib/fluent/config/element.rb', line 40

def unused_in
  @unused_in
end

#v1_config ⇒ Object

Returns the value of attribute v1_config.



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# File 'lib/fluent/config/element.rb', line 40

def v1_config
  @v1_config
end

Class Method Details

.unescape_parameter(v) ⇒ Object 



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# File 'lib/fluent/config/element.rb', line 211

def self.unescape_parameter(v)
  result = ''
  v.each_char { |c| result << LiteralParser.unescape_char(c) }
  result
end

Instance Method Details

#+(o) ⇒ Object 



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# File 'lib/fluent/config/element.rb', line 85

def +(o)
  e = Element.new(@name.dup, @arg.dup, o.merge(self), @elements + o.elements, (@unused + o.unused).uniq)
  e.v1_config = @v1_config
  e
end

#==(o) ⇒ Object

This method assumes o is an Element object. Should return false for nil or other object



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# File 'lib/fluent/config/element.rb', line 77

def ==(o)
  self.name == o.name && self.arg == o.arg &&
    self.keys.size == o.keys.size &&
    self.keys.reduce(true){|r, k| r && self[k] == o[k] } &&
    self.elements.size == o.elements.size &&
    [self.elements, o.elements].transpose.reduce(true){|r, e| r && e[0] == e[1] }
end

#[](key) ⇒ Object 



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# File 'lib/fluent/config/element.rb', line 110

def [](key)
  @unused_in = false # ditto
  @unused.delete(key)

  if RESERVED_PARAMETERS.include?(key) && !has_key?(key) && has_key?(RESERVED_PARAMETERS_COMPAT[key])
    @logger.warn "'#{RESERVED_PARAMETERS_COMPAT[key]}' is deprecated parameter name. use '#{key}' instead." if @logger
    return self[RESERVED_PARAMETERS_COMPAT[key]]
  end

  super
end

#add_element(name, arg = '') ⇒ Object 



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# File 'lib/fluent/config/element.rb', line 64

def add_element(name, arg = '')
  e = Element.new(name, arg, {}, [])
  e.v1_config = @v1_config
  @elements << e
  e
end

#check_not_fetched(&block) ⇒ Object 



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# File 'lib/fluent/config/element.rb', line 122

def check_not_fetched(&block)
  each_key { |key|
    if @unused.include?(key)
      block.call(key, self)
    end
  }
  @elements.each { |e|
    e.check_not_fetched(&block)
  }
end

#dump_value(k, v, nindent) ⇒ Object 



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# File 'lib/fluent/config/element.rb', line 189

def dump_value(k, v, nindent)
  if secret_param?(k)
    "#{nindent}#{k} xxxxxx\n"
  else
    if @v1_config
      case param_type(k)
      when :string
        "#{nindent}#{k} \"#{self.class.unescape_parameter(v)}\"\n"
      when :enum, :integer, :float, :size, :bool, :time
        "#{nindent}#{k} #{v}\n"
      when :hash, :array
        "#{nindent}#{k} #{v}\n"
      else
        # Unknown type
        "#{nindent}#{k} #{v}\n"
      end
    else
      "#{nindent}#{k} #{v}\n"
    end
  end
end

#each_element(*names, &block) ⇒ Object

no code in fluentd uses this method



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# File 'lib/fluent/config/element.rb', line 92

def each_element(*names, &block)
  if names.empty?
    @elements.each(&block)
  else
    @elements.each { |e|
      if names.include?(e.name)
        block.yield(e)
      end
    }
  end
end

#has_key?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/config/element.rb', line 104

def has_key?(key)
  @unused_in = false # some sections, e.g. <store> in copy, is not defined by config_section so clear unused flag for better warning message in check_not_fetched.
  @unused.delete(key)
  super
end

#inspect ⇒ Object 



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# File 'lib/fluent/config/element.rb', line 71

def inspect
  attrs = super
  "name:#{@name}, arg:#{@arg}, " + attrs + ", " + @elements.inspect
end

#param_type(key) ⇒ Object 



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# File 'lib/fluent/config/element.rb', line 177

def param_type(key)
  return nil if @corresponding_proxies.empty?

  param_key = key.to_sym
  proxy = @corresponding_proxies.detect do |_proxy|
    _proxy.params.has_key?(param_key)
  end
  return nil unless proxy
  _block, opts = proxy.params[param_key]
  opts[:type]
end

#secret_param?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/config/element.rb', line 163

def secret_param?(key)
  return false if @corresponding_proxies.empty?

  param_key = key.to_sym
  @corresponding_proxies.each { |proxy|
    _block, opts = proxy.params[param_key]
    if opts && opts.has_key?(:secret)
      return opts[:secret]
    end
  }

  false
end

#to_masked_element ⇒ Object 



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# File 'lib/fluent/config/element.rb', line 152

def to_masked_element
  new_elems = @elements.map { |e| e.to_masked_element }
  new_elem = Element.new(@name, @arg, {}, new_elems, @unused)
  new_elem.v1_config = @v1_config
  new_elem.corresponding_proxies = @corresponding_proxies
  each_pair { |k, v|
    new_elem[k] = secret_param?(k) ? 'xxxxxx' : v
  }
  new_elem
end

#to_s(nest = 0) ⇒ Object 



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# File 'lib/fluent/config/element.rb', line 133

def to_s(nest = 0)
  indent = "  " * nest
  nindent = "  " * (nest + 1)
  out = ""
  if @arg.empty?
    out << "#{indent}<#{@name}>\n"
  else
    out << "#{indent}<#{@name} #{@arg}>\n"
  end
  each_pair { |k, v|
    out << dump_value(k, v, nindent)
  }
  @elements.each { |e|
    out << e.to_s(nest + 1)
  }
  out << "#{indent}</#{@name}>\n"
  out
end