Class: Humidifier::Resource

Inherits:

Object

Object
Humidifier::Resource

show all

Defined in:: lib/humidifier/resource.rb

Overview

Superclass for all AWS resources

Direct Known Subclasses

Constant Summary collapse

COMMON_ATTRIBUTES = Attributes that are available to every stack

Humidifier.underscore(
  %w[Condition CreationPolicy DeletionPolicy DependsOn Metadata
     UpdatePolicy]
)

Class Attribute Summary collapse

.aws_name ⇒ Object

Returns the value of attribute aws_name.
.props ⇒ Object

Returns the value of attribute props.

Class Method Summary collapse

.prop?(prop) ⇒ Boolean

true if this resource has the given property.

Instance Method Summary collapse

#initialize(properties = {}) ⇒ Resource constructor

A new instance of Resource.
#method_missing(name, *args) ⇒ Object

Patches method_missing to include property accessors After the first method call, builds the accessor methods to get a speed boost.
#respond_to_missing?(name) ⇒ Boolean

Patches respond_to_missing? to include property accessors.
#to_cf ⇒ Object

CFN stack syntax.
#update(properties) ⇒ Object

Update a set of properties defined by the given properties hash.
#update_attributes(attributes) ⇒ Object

Update the attributes of the resource defined by COMMON_ATTRIBUTES.
#update_property(property, value) ⇒ Object

Update an individual property on this resource.

Constructor Details

#initialize(properties = {}) ⇒ `Resource`

Returns a new instance of Resource.

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

def initialize(properties = {})
  self.properties = {}
  update(properties)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args) ⇒ `Object`

Patches method_missing to include property accessors After the first method call, builds the accessor methods to get a speed boost

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

def method_missing(name, *args)
  if !valid_accessor?(name)
    super
  elsif self.class.prop?(name.to_s)
    self.class.build_property_reader(name)
    send(name)
  else
    self.class.build_property_writer(name)
    send(name, args.first)
  end
end

Class Attribute Details

.aws_name ⇒ `Object`

Returns the value of attribute aws_name.



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# File 'lib/humidifier/resource.rb', line 80

def aws_name
  @aws_name
end

.props ⇒ `Object`

Returns the value of attribute props.



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# File 'lib/humidifier/resource.rb', line 80

def props
  @props
end

Class Method Details

.prop?(prop) ⇒ `Boolean`

true if this resource has the given property

Returns:

(Boolean)



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# File 'lib/humidifier/resource.rb', line 97

def prop?(prop)
  props.key?(prop)
end

Instance Method Details

#respond_to_missing?(name) ⇒ `Boolean`

Patches respond_to_missing? to include property accessors

Returns:

(Boolean)



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# File 'lib/humidifier/resource.rb', line 36

def respond_to_missing?(name, *)
  valid_accessor?(name) || super
end

#to_cf ⇒ `Object`

CFN stack syntax

# File 'lib/humidifier/resource.rb', line 41

def to_cf
  props_cf =
    properties.map do |key, value|
      self.class.props[key].to_cf(value)
    end

  common_attributes.merge!(
    "Type" => self.class.aws_name,
    "Properties" => props_cf.to_h
  )
end

#update(properties) ⇒ `Object`

Update a set of properties defined by the given properties hash

# File 'lib/humidifier/resource.rb', line 54

def update(properties)
  properties.each do |property, value|
    update_property(property, value)
  end
end

#update_attributes(attributes) ⇒ `Object`

Update the attributes of the resource defined by COMMON_ATTRIBUTES

# File 'lib/humidifier/resource.rb', line 61

def update_attributes(attributes)
  attributes.each do |attribute, value|
    unless COMMON_ATTRIBUTES.value?(attribute)
      raise ArgumentError, "Invalid attribute: #{attribute}"
    end

    public_send(:"#{attribute}=", value)
  end
end

#update_property(property, value) ⇒ `Object`

Update an individual property on this resource

# File 'lib/humidifier/resource.rb', line 72

def update_property(property, value)
  property = property.to_s
  property = validate_property(property)
  value = validate_value(property, value)
  properties[property] = value
end

Class: Humidifier::Resource

Overview

Direct Known Subclasses

Constant Summary collapse

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(properties = {}) ⇒ Resource

Dynamic Method Handling

#method_missing(name, *args) ⇒ Object

Class Attribute Details

.aws_name ⇒ Object

.props ⇒ Object

Class Method Details

.prop?(prop) ⇒ Boolean

Instance Method Details

#respond_to_missing?(name) ⇒ Boolean

#to_cf ⇒ Object

#update(properties) ⇒ Object

#update_attributes(attributes) ⇒ Object

#update_property(property, value) ⇒ Object