Class: Puppet::Resource

Inherits:
Object show all
Extended by:
Indirector
Includes:
Enumerable, Util::PsychSupport, Util::Tagging
Defined in:
lib/puppet/resource.rb,
lib/puppet/resource/status.rb

Overview

The simplest resource class. Eventually it will function as the base class for all resource-like behaviour.

Direct Known Subclasses

Parser::Resource

Defined Under Namespace

Modules: CapabilityFinder, Validator Classes: Catalog, Ral, Status, StoreConfigs, Type, TypeCollection

Constant Summary collapse

EMPTY_ARRAY = 
[].freeze
EMPTY_HASH = 
{}.freeze
ATTRIBUTES = 
[:file, :line, :exported].freeze
TYPE_CLASS = 
'Class'.freeze
TYPE_NODE = 
'Node'.freeze
TYPE_SITE = 
'Site'.freeze
PCORE_TYPE_KEY = 
'__ptype'.freeze
VALUE_KEY = 
'value'.freeze

Constants included from Indirector

Indirector::BadNameRegexp

Constants included from Util::Tagging

Util::Tagging::ValidTagRegex

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Indirector

configure_routes, indirects

Methods included from Enumerable

#uniq

Methods included from Util::PsychSupport

#encode_with, #init_with

Methods included from Util::Tagging

#merge_into, #merge_tags_from, #raw_tagged?, #set_tags, #tag, #tag_if_valid, #tagged?, #tags, #tags=, #valid_tag?

Constructor Details

#initialize(type, title = nil, attributes = EMPTY_HASH) ⇒ Resource

Construct a resource from data.

Constructs a resource instance with the given ‘type` and `title`. Multiple type signatures are possible for these arguments and most will result in an expensive call to Node::Environment#known_resource_types in order to resolve `String` and `Symbol` Types to actual Ruby classes.

Parameters:

  • type (Symbol, String) —

    The name of the Puppet Type, as a string or symbol. The actual Type will be looked up using Node::Environment#known_resource_types. This lookup is expensive.

  • type (String) —

    The full resource name in the form of ‘“Type”`. This method of calling should only be used when `title` is `nil`.

  • type (nil) —

    If a ‘nil` is passed, the title argument must be a string of the form `“Type”`.

  • type (Class) —

    A class that inherits from ‘Puppet::Type`. This method of construction is much more efficient as it skips calls to Node::Environment#known_resource_types.

  • title (String, :main, nil) (defaults to: nil) —

    The title of the resource. If type is ‘nil`, may also be the full resource name in the form of `“Type”`.



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# File 'lib/puppet/resource.rb', line 238

def initialize(type, title = nil, attributes = EMPTY_HASH)
  @parameters = {}
  @sensitive_parameters = []
  if type.is_a?(Puppet::Resource)
    # Copy constructor. Let's avoid munging, extracting, tagging, etc
    src = type
    self.file = src.file
    self.line = src.line
    self.exported = src.exported
    self.virtual = src.virtual
    self.set_tags(src)
    self.environment = src.environment
    @rstype = src.resource_type
    @type = src.type
    @title = src.title

    src.to_hash.each do |p, v|
      if v.is_a?(Puppet::Resource)
        v = v.copy_as_resource
      elsif v.is_a?(Array)
        # flatten resource references arrays
        v = v.flatten if v.flatten.find { |av| av.is_a?(Puppet::Resource) }
        v = v.collect do |av|
          av = av.copy_as_resource if av.is_a?(Puppet::Resource)
          av
        end
      end

      self[p] = v
    end
    @sensitive_parameters.replace(type.sensitive_parameters)
  else
    if type.is_a?(Hash)
      #TRANSLATORS 'Puppet::Resource.new' should not be translated
      raise ArgumentError, _("Puppet::Resource.new does not take a hash as the first argument.") + ' ' +
        _("Did you mean (%{type}, %{title}) ?") %
            { type: (type[:type] || type["type"]).inspect, title: (type[:title] || type["title"]).inspect }
    end

    # In order to avoid an expensive search of 'known_resource_types" and
    # to obey/preserve the implementation of the resource's type - if the
    # given type is a resource type implementation (one of):
    #   * a "classic" 3.x ruby plugin
    #   * a compatible implementation (e.g. loading from pcore metadata)
    #   * a resolved user defined type
    #
    # ...then, modify the parameters to the "old" (agent side compatible) way
    # of describing the type/title with string/symbols.
    #
    # TODO: Further optimizations should be possible as the "type juggling" is
    # not needed when the type implementation is known.
    #
    if type.is_a?(Puppet::CompilableResourceType) || type.is_a?(Puppet::Resource::Type)
      # set the resource type implementation
      self.resource_type = type
      # set the type name to the symbolic name
      type = type.name
    end
    @exported = false

    # Set things like environment, strictness first.
    attributes.each do |attr, value|
      next if attr == :parameters
      send(attr.to_s + "=", value)
    end

    @type, @title = self.class.type_and_title(type, title)

    rt = resource_type

    if strict? && rt.nil?
      if self.class?
        raise ArgumentError, _("Could not find declared class %{title}") % { title: title }
      else
        raise ArgumentError, _("Invalid resource type %{type}") % { type: type }
      end
    end

    params = attributes[:parameters]
    unless params.nil? || params.empty?
      extract_parameters(params)
      if rt && rt.respond_to?(:deprecate_params)
        rt.deprecate_params(title, params)
      end
    end

    tag(self.type)
    tag_if_valid(self.title)
  end
end

Instance Attribute Details

#catalog ⇒ Object 



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# File 'lib/puppet/resource.rb', line 14

def catalog
  @catalog
end

#exported ⇒ Object 



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# File 'lib/puppet/resource.rb', line 14

def exported
  @exported
end

#file ⇒ Object 



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# File 'lib/puppet/resource.rb', line 14

def file
  @file
end

#line ⇒ Object 



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# File 'lib/puppet/resource.rb', line 14

def line
  @line
end

#parameters ⇒ Object (readonly) 



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# File 'lib/puppet/resource.rb', line 15

def parameters
  @parameters
end

#sensitive_parameters ⇒ Array<Symbol>

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns A list of parameters to be treated as sensitive.

Returns:

  • (Array<Symbol>) —

    A list of parameters to be treated as sensitive



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# File 'lib/puppet/resource.rb', line 20

def sensitive_parameters
  @sensitive_parameters
end

#strict ⇒ Object 



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# File 'lib/puppet/resource.rb', line 14

def strict
  @strict
end

#title ⇒ Object (readonly) 



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# File 'lib/puppet/resource.rb', line 15

def title
  @title
end

#type ⇒ Object (readonly) 



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# File 'lib/puppet/resource.rb', line 15

def type
  @type
end

#validate_parameters ⇒ Object

Deprecated. 


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# File 'lib/puppet/resource.rb', line 23

def validate_parameters
  @validate_parameters
end

#virtual ⇒ Object 



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# File 'lib/puppet/resource.rb', line 14

def virtual
  @virtual
end

Class Method Details

.from_data_hash(data) ⇒ Object 



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# File 'lib/puppet/resource.rb', line 40

def self.from_data_hash(data)
  resource = self.allocate
  resource.initialize_from_hash(data)
  resource
end

.resource_type(type, title, environment) ⇒ Puppet::Type, Puppet::Resource::Type

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

The resource’s type implementation

Returns:



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# File 'lib/puppet/resource.rb', line 371

def self.resource_type(type, title, environment)
  case type
  when TYPE_CLASS; environment.known_resource_types.hostclass(title == :main ? "" : title)
  when TYPE_NODE; environment.known_resource_types.node(title)
  when TYPE_SITE; environment.known_resource_types.site(nil)
  else
    result = Puppet::Type.type(type)
    if !result
      krt = environment.known_resource_types
      result = krt.definition(type) || krt.application(type)
    end
    result
  end
end

.type_and_title(type, title) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/resource.rb', line 595

def self.type_and_title(type, title)
  type, title = extract_type_and_title(type, title)
  type = munge_type_name(type)
  if type == TYPE_CLASS
    title = title == '' ? :main : munge_type_name(title)
  end
  [type, title]
end

.value_to_json_data(value) ⇒ Object 



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# File 'lib/puppet/resource.rb', line 132

def self.value_to_json_data(value)
  if value.is_a?(Array)
    value.map{|v| value_to_json_data(v) }
  elsif value.is_a?(Hash)
    result = {}
    value.each_pair { |k, v| result[value_to_json_data(k)] = value_to_json_data(v) }
    result
  elsif value.is_a?(Puppet::Resource)
    value.to_s
  elsif value.is_a?(Symbol) && value == :undef
    nil
  else
    value
  end
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/puppet/resource.rb', line 173

def ==(other)
  return false unless other.respond_to?(:title) and self.type == other.type and self.title == other.title

  return false unless to_hash == other.to_hash
  true
end

#[](param) ⇒ Object

Return a given parameter’s value. Converts all passed names to lower-case symbols.



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# File 'lib/puppet/resource.rb', line 169

def [](param)
  parameters[parameter_name(param)]
end

#[]=(param, value) ⇒ Object

Set a given parameter. Converts all passed names to lower-case symbols.



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# File 'lib/puppet/resource.rb', line 162

def []=(param, value)
  validate_parameter(param) if validate_parameters
  parameters[parameter_name(param)] = value
end

#builtin? ⇒ Boolean

Compatibility method.

Returns:

  • (Boolean) 


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# File 'lib/puppet/resource.rb', line 181

def builtin?
  # TODO: should be deprecated (was only used in one place in puppet codebase)
  builtin_type?
end

#builtin_type? ⇒ Boolean

Is this a builtin resource type?

Returns:

  • (Boolean) 


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# File 'lib/puppet/resource.rb', line 187

def builtin_type?
  # Note - old implementation only checked if the resource_type was a Class
  resource_type.is_a?(Puppet::CompilableResourceType)
end

#class? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/puppet/resource.rb', line 207

def class?
  @is_class ||= @type == TYPE_CLASS
end

#copy_as_resource ⇒ Object 



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# File 'lib/puppet/resource.rb', line 528

def copy_as_resource
  Puppet::Resource.new(self)
end

#each ⇒ Object

Iterate over each param/value pair, as required for Enumerable.



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# File 'lib/puppet/resource.rb', line 193

def each
  parameters.each { |p,v| yield p, v }
end

#environment ⇒ Object 



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# File 'lib/puppet/resource.rb', line 393

def environment
  @environment ||= if catalog
                     catalog.environment_instance
                   else
                     Puppet.lookup(:current_environment) { Puppet::Node::Environment::NONE }
                   end
end

#environment=(environment) ⇒ Object 



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# File 'lib/puppet/resource.rb', line 401

def environment=(environment)
  @environment = environment
end

#export ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns the value of the ‘export’ metaparam as an Array



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# File 'lib/puppet/resource.rb', line 356

def export
  v = self[:export] || []
  v.is_a?(Array) ? v : [ v ]
end

#include?(parameter) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/puppet/resource.rb', line 197

def include?(parameter)
  super || parameters.keys.include?( parameter_name(parameter) )
end

#initialize_from_hash(data) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/puppet/resource.rb', line 46

def initialize_from_hash(data)
  raise ArgumentError, _('No resource type provided in serialized data') unless type = data['type']
  raise ArgumentError, _('No resource title provided in serialized data') unless title = data['title']
  @type, @title = self.class.type_and_title(type, title)

  if params = data['parameters']
    params = Puppet::Pops::Serialization::FromDataConverter.convert(params)
    @parameters = {}
    params.each { |param, value| self[param] = value }
  else
    @parameters = EMPTY_HASH
  end

  if sensitives = data['sensitive_parameters']
    @sensitive_parameters = sensitives.map(&:to_sym)
  else
    @sensitive_parameters = EMPTY_ARRAY
  end

  if tags = data['tags']
    tag(*tags)
  end

  ATTRIBUTES.each do |a|
    value = data[a.to_s]
    send("#{a}=", value) unless value.nil?
  end
end

#inspect ⇒ Object 



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# File 'lib/puppet/resource.rb', line 75

def inspect
  "#{@type}[#{@title}]#{to_hash.inspect}"
end

#is_application_component? ⇒ Boolean

A resource is an application component if it exports or consumes one or more capabilities, or if it requires a capability resource

Returns:

  • (Boolean) 


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# File 'lib/puppet/resource.rb', line 340

def is_application_component?
  return true if ! export.empty? || self[:consume]
  # Array(self[:require]) does not work for Puppet::Resource instances
  req = self[:require] || []
  req = [ req ] unless req.is_a?(Array)
  req.any? { |r| r.is_capability? }
end

#is_capability? ⇒ Boolean

A resource is a capability (instance) if its underlying type is a capability type

Returns:

  • (Boolean) 


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# File 'lib/puppet/resource.rb', line 350

def is_capability?
  !resource_type.nil? && resource_type.is_capability?
end

#key_attributes ⇒ Object 



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# File 'lib/puppet/resource.rb', line 425

def key_attributes
  resource_type.respond_to?(:key_attributes) ? resource_type.key_attributes : [:name]
end

#name ⇒ Object 



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# File 'lib/puppet/resource.rb', line 481

def name
  # this is potential namespace conflict
  # between the notion of an "indirector name"
  # and a "resource name"
  [ type, title ].join('/')
end

#pos ⇒ Integer

This method, together with #file and #line, makes it possible for a Resource to be a ‘source_pos’ in a reported issue.

Returns:

  • (Integer) —

    Instances of this class will always return ‘nil`.



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# File 'lib/puppet/resource.rb', line 572

def pos
  nil
end

#prune_parameters(options = EMPTY_HASH) ⇒ Object 



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# File 'lib/puppet/resource.rb', line 576

def prune_parameters(options = EMPTY_HASH)
  properties = resource_type.properties.map(&:name)

  dup.collect do |attribute, value|
    if value.to_s.empty? or Array(value).empty?
      delete(attribute)
    elsif value.to_s == "absent" and attribute.to_s != "ensure"
      delete(attribute)
    end

    parameters_to_include = resource_type.parameters_to_include
    parameters_to_include += options[:parameters_to_include] || []

    delete(attribute) unless properties.include?(attribute) || parameters_to_include.include?(attribute)
  end
  self
end

#ref ⇒ Object 



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# File 'lib/puppet/resource.rb', line 329

def ref
  to_s
end

#resolve ⇒ Object

Find our resource.



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# File 'lib/puppet/resource.rb', line 334

def resolve
  catalog ? catalog.resource(to_s) : nil
end

#resource_type ⇒ Puppet::Type, Puppet::Resource::Type

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

The resource’s type implementation

Returns:



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# File 'lib/puppet/resource.rb', line 364

def resource_type
  @rstype ||= self.class.resource_type(type, title, environment)
end

#resource_type=(type) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Set the resource’s type implementation

Parameters:



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# File 'lib/puppet/resource.rb', line 389

def resource_type=(type)
  @rstype = type
end

#set_default_parameters(scope) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Deprecated.

Not used by Puppet



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# File 'lib/puppet/resource.rb', line 498

def set_default_parameters(scope)
  Puppet.deprecation_warning(_('The method Puppet::Resource.set_default_parameters is deprecated and will be removed in the next major release of Puppet.'))

  return [] unless resource_type and resource_type.respond_to?(:arguments)

  unless is_a?(Puppet::Parser::Resource)
    fail Puppet::DevError, _("Cannot evaluate default parameters for %{resource} - not a parser resource") % { resource: self }
  end

  missing_arguments.collect do |param, default|
    rtype = resource_type
    if rtype.type == :hostclass
      using_bound_value = false
      catch(:no_such_key) do
        bound_value = Puppet::Pops::Lookup.search_and_merge("#{rtype.name}::#{param}", Puppet::Pops::Lookup::Invocation.new(scope), nil)
        # Assign bound value but don't let an undef trump a default expression
        unless bound_value.nil? && !default.nil?
          self[param.to_sym] = bound_value
          using_bound_value = true
        end
      end
    end
    unless using_bound_value
      next if default.nil?
      self[param.to_sym] = default.safeevaluate(scope)
    end
    param
  end.compact
end

#stage? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/puppet/resource.rb', line 211

def stage?
  @is_stage ||= @type.to_s.downcase == "stage"
end

#to_data_hash ⇒ Object

Produces a Data compliant hash of the resource. The result depends on the –rich_data setting, and the context value for Puppet.lookup(:stringify_rich), that if it is ‘true` will use the ToStringifiedConverter to produce the value per parameter. (Note that the ToStringifiedConverter output is lossy and should not be used when producing a catalog serialization).



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# File 'lib/puppet/resource.rb', line 86

def to_data_hash
  data = {
    'type' => type,
    'title' => title.to_s,
    'tags' => tags.to_data_hash
  }
  ATTRIBUTES.each do |param|
    value = send(param)
    data[param.to_s] = value unless value.nil?
  end

  data['exported'] ||= false

  # To get stringified parameter values the flag :stringify_rich can be set
  # in the puppet context.
  #
  stringify = Puppet.lookup(:stringify_rich) { false }
  converter = stringify ? Puppet::Pops::Serialization::ToStringifiedConverter.new : nil

  params = {}
  self.to_hash.each_pair do |param, value|
    # Don't duplicate the title as the namevar
    unless param == namevar && value == title
      if stringify
        params[param.to_s] = converter.convert(value)
      else
        params[param.to_s] = Puppet::Resource.value_to_json_data(value)
      end
    end
  end

  unless params.empty?
    data['parameters'] = Puppet::Pops::Serialization::ToDataConverter.convert(params, {
      :rich_data => Puppet.lookup(:rich_data),
      :symbol_as_string => true,
      :local_reference => false,
      :type_by_reference => true,
      :message_prefix => ref,
      :semantic => self
    })
  end

  data['sensitive_parameters'] = sensitive_parameters.map(&:to_s) unless sensitive_parameters.empty?
  data
end

#to_hash ⇒ Object

Produces a hash of attribute to value mappings where the title parsed into its components acts as the default values overridden by any parameter values explicitly given as parameters.



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# File 'lib/puppet/resource.rb', line 408

def to_hash
  parse_title.merge parameters
end

#to_hierayaml ⇒ Object

Convert our resource to yaml for Hiera purposes.



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# File 'lib/puppet/resource.rb', line 430

def to_hierayaml
  # Collect list of attributes to align => and move ensure first
  attr = parameters.keys
  attr_max = attr.inject(0) { |max,k| k.to_s.length > max ? k.to_s.length : max }

  attr.sort!
  if attr.first != :ensure  && attr.include?(:ensure)
    attr.delete(:ensure)
    attr.unshift(:ensure)
  end

  attributes = attr.collect { |k|
    v = parameters[k]
    "    %-#{attr_max}s: %s\n" % [k, Puppet::Parameter.format_value_for_display(v)]
  }.join

  "  %s:\n%s" % [self.title, attributes]
end

#to_manifest ⇒ Object

Convert our resource to Puppet code.



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# File 'lib/puppet/resource.rb', line 450

def to_manifest
  # Collect list of attributes to align => and move ensure first
  attr = parameters.keys
  attr_max = attr.inject(0) { |max,k| k.to_s.length > max ? k.to_s.length : max }

  attr.sort!
  if attr.first != :ensure  && attr.include?(:ensure)
    attr.delete(:ensure)
    attr.unshift(:ensure)
  end

  attributes = attr.collect { |k|
    v = parameters[k]
    "  %-#{attr_max}s => %s,\n" % [k, Puppet::Parameter.format_value_for_display(v)]
  }.join

  escaped = self.title.gsub(/'/,"\\\\'")
  "%s { '%s':\n%s}" % [self.type.to_s.downcase, escaped, attributes]
end

#to_ral ⇒ Object

Convert our resource to a RAL resource instance. Creates component instances for resource types that don’t exist.



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# File 'lib/puppet/resource.rb', line 476

def to_ral
  typeklass = Puppet::Type.type(self.type) || Puppet::Type.type(:component)
  typeklass.new(self)
end

#to_ref ⇒ Object 



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# File 'lib/puppet/resource.rb', line 470

def to_ref
  ref
end

#to_s ⇒ Object 



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# File 'lib/puppet/resource.rb', line 412

def to_s
  "#{type}[#{title}]"
end

#uniqueness_key ⇒ Object 



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# File 'lib/puppet/resource.rb', line 416

def uniqueness_key
  # Temporary kludge to deal with inconsistent use patterns; ensure we don't return nil for namevar/:name
  h = self.to_hash
  name = h[namevar] || h[:name] || self.name
  h[namevar] ||= name
  h[:name]   ||= name
  h.values_at(*key_attributes.sort_by { |k| k.to_s })
end

#valid_parameter?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/puppet/resource.rb', line 532

def valid_parameter?(name)
  resource_type.valid_parameter?(name)
end

#validate_complete ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Deprecated.

Not used by Puppet

Verify that all required arguments are either present or have been provided with defaults. Must be called after ‘set_default_parameters’. We can’t join the methods because Type#set_parameters needs specifically ordered behavior.



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# File 'lib/puppet/resource.rb', line 543

def validate_complete
  Puppet.deprecation_warning(_('The method Puppet::Resource.validate_complete is deprecated and will be removed in the next major release of Puppet.'))

  return unless resource_type and resource_type.respond_to?(:arguments)

  resource_type.arguments.each do |param, default|
    param = param.to_sym
    fail Puppet::ParseError, _("Must pass %{param} to %{resource}") % { param: param, resource: self } unless parameters.include?(param)
  end

  # Perform optional type checking
  arg_types = resource_type.argument_types
  # Parameters is a map from name, to parameter, and the parameter again has name and value
  parameters.each do |name, value|
    next unless t = arg_types[name.to_s]  # untyped, and parameters are symbols here (aargh, strings in the type)
    unless Puppet::Pops::Types::TypeCalculator.instance?(t, value.value)
      inferred_type = Puppet::Pops::Types::TypeCalculator.infer_set(value.value)
      actual = inferred_type.generalize()
      fail Puppet::ParseError, _("Expected parameter '%{name}' of '%{value0}' to have type %{value1}, got %{value2}") % { name: name, value0: self, value1: t.to_s, value2: actual.to_s }
    end
  end
end

#validate_parameter(name) ⇒ Object

Raises:



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# File 'lib/puppet/resource.rb', line 566

def validate_parameter(name)
  raise Puppet::ParseError.new(_("no parameter named '%{name}'") % { name: name }, file, line) unless valid_parameter?(name)
end

#yaml_property_munge(x) ⇒ Object 



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# File 'lib/puppet/resource.rb', line 148

def yaml_property_munge(x)
  self.value.to_json_data(x)
end