Class: Puppet::Indirector::Terminus

Inherits:
Object
  • Object
show all
Extended by:
Util::Docs, Util::InstanceLoader
Defined in:
lib/vendor/puppet/indirector/terminus.rb

Overview

A simple class that can function as the base class for indirected types.

Constant Summary

Constants included from Util

Util::AbsolutePathPosix, Util::AbsolutePathWindows

Constants included from Util::Docs

Util::Docs::HEADER_LEVELS

Class Attribute Summary collapse

Attributes included from Util::Docs

#doc, #nodoc

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util::InstanceLoader

instance_docs, instance_hash, instance_load, instance_loader, instance_loading?, loaded_instance, loaded_instances

Methods included from Util

absolute_path?, activerecord_version, benchmark, binread, chuser, classproxy, #execfail, #execpipe, execute, execute_posix, execute_windows, logmethods, memory, path_to_uri, proxy, replace_file, safe_posix_fork, symbolize, symbolizehash, symbolizehash!, synchronize_on, thinmark, #threadlock, uri_to_path, wait_for_output, which, withumask

Methods included from Util::POSIX

#get_posix_field, #gid, #idfield, #methodbyid, #methodbyname, #search_posix_field, #uid

Methods included from Util::Docs

desc, dochook, doctable, markdown_definitionlist, markdown_header, nodoc?, pad, scrub

Constructor Details

#initialize ⇒ Terminus

Returns a new instance of Terminus.

Raises:



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 130

def initialize
  raise Puppet::DevError, "Cannot create instances of abstract terminus types" if self.class.abstract_terminus?
end

Class Attribute Details

.abstract_terminus ⇒ Object (readonly)

Returns the value of attribute abstract_terminus.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 14

def abstract_terminus
  @abstract_terminus
end

.indirection ⇒ Object

Returns the value of attribute indirection.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 14

def indirection
  @indirection
end

.name ⇒ Object

Returns the value of attribute name.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 13

def name
  @name
end

.terminus_type ⇒ Object

Returns the value of attribute terminus_type.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 13

def terminus_type
  @terminus_type
end

Class Method Details

.abstract_terminus? ⇒ Boolean

Are we an abstract terminus type, rather than an instance with an associated indirection?

Returns:

  • (Boolean) 


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# File 'lib/vendor/puppet/indirector/terminus.rb', line 18

def abstract_terminus?
  abstract_terminus
end

.const2name(const) ⇒ Object

Convert a constant to a short name.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 23

def const2name(const)
  const.sub(/^[A-Z]/) { |i| i.downcase }.gsub(/[A-Z]/) { |i| "_#{i.downcase}" }.intern
end

.indirection_name ⇒ Object 



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 38

def indirection_name
  @indirection.name
end

.inherited(subclass) ⇒ Object

Register our subclass with the appropriate indirection. This follows the convention that our terminus is named after the indirection.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 45

def inherited(subclass)
  longname = subclass.to_s
  if longname =~ /#<Class/
    raise Puppet::DevError, "Terminus subclasses must have associated constants"
  end
  names = longname.split("::")

  # Convert everything to a lower-case symbol, converting camelcase to underscore word separation.
  name = names.pop.sub(/^[A-Z]/) { |i| i.downcase }.gsub(/[A-Z]/) { |i| "_#{i.downcase}" }.intern

  subclass.name = name

  # Short-circuit the abstract types, which are those that directly subclass
  # the Terminus class.
  if self == Puppet::Indirector::Terminus
    subclass.mark_as_abstract_terminus
    return
  end

  # Set the terminus type to be the name of the abstract terminus type.
  # Yay, class/instance confusion.
  subclass.terminus_type = self.name

  # Our subclass is specifically associated with an indirection.
  raise("Invalid name #{longname}") unless names.length > 0
  indirection_name = names.pop.sub(/^[A-Z]/) { |i| i.downcase }.gsub(/[A-Z]/) { |i| "_#{i.downcase}" }.intern

  if indirection_name == "" or indirection_name.nil?
    raise Puppet::DevError, "Could not discern indirection model from class constant"
  end

  # This will throw an exception if the indirection instance cannot be found.
  # Do this last, because it also registers the terminus type with the indirection,
  # which needs the above information.
  subclass.indirection = indirection_name

  # And add this instance to the instance hash.
  Puppet::Indirector::Terminus.register_terminus_class(subclass)
end

.mark_as_abstract_terminus ⇒ Object

Mark that this instance is abstract.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 86

def mark_as_abstract_terminus
  @abstract_terminus = true
end

.model ⇒ Object 



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 90

def model
  indirection.model
end

.name2const(name) ⇒ Object

Convert a short name to a constant.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 95

def name2const(name)
  name.to_s.capitalize.sub(/_(.)/) { |i| $1.upcase }
end

.register_terminus_class(klass) ⇒ Object

Register a class, probably autoloaded.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 100

def register_terminus_class(klass)
  setup_instance_loading klass.indirection_name
  instance_hash(klass.indirection_name)[klass.name] = klass
end

.terminus_class(indirection_name, terminus_type) ⇒ Object

Return a terminus by name, using the autoloader.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 106

def terminus_class(indirection_name, terminus_type)
  setup_instance_loading indirection_name
  loaded_instance(indirection_name, terminus_type)
end

.terminus_classes(indirection_name) ⇒ Object

Return all terminus classes for a given indirection.



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 112

def terminus_classes(indirection_name)
  setup_instance_loading indirection_name
  instance_loader(indirection_name).files_to_load.map do |file|
    File.basename(file).chomp(".rb").intern
  end
end

Instance Method Details

#indirection ⇒ Object 



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 126

def indirection
  self.class.indirection
end

#model ⇒ Object 



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 134

def model
  self.class.model
end

#name ⇒ Object 



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 138

def name
  self.class.name
end

#terminus_type ⇒ Object 



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# File 'lib/vendor/puppet/indirector/terminus.rb', line 142

def terminus_type
  self.class.terminus_type
end