Class: AWSTracker::Tag

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
lib/aws_tracker/models/tag.rb

Constant Summary collapse

@@RIGHT_AWS_CLASS_NAMES =

Maps right_aws Tag resource_types to the corresponding ActiveRecord Class names

{
  :instance => :Instance,
  :volume   => :EBSVolume
}
@@AWS_PK_FIELDS =

Maps ActiveRecord Class names to their Amamzon “primary key” attribute names

{
  :Instance   => :instance_id,
  :EBSVolume  => :volume_id
}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.refresh_from_account(acc) ⇒ Object 



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# File 'lib/aws_tracker/models/tag.rb', line 25

def self.(acc)
  acc.log.info "Updating tags for account '#{acc.name}'"

  right_aws_array = acc.ec2.describe_tags
  right_aws_array.each do |rs_tag|
    # First, dereference the polymorphic association, and
    # ABORT if the Tag's AWS resource is not found in the current state
    right_aws_type = rs_tag[:resource_type].to_sym
    resource_class_name = @@RIGHT_AWS_CLASS_NAMES[right_aws_type]
    aws_pk_attribute = @@AWS_PK_FIELDS[resource_class_name]
    collection_name = resource_class_name.to_s.pluralize.underscore
    tag_resource = acc.send(collection_name).find(:first,
    :conditions => { aws_pk_attribute => rs_tag[:resource_id]})
    if (tag_resource == nil)
      acc.log.warn "Tag #{rs_tag[:key]} references nonexistent "+
      "#{resource_class_name} #{rs_tag[:resource_id]}. Ignoring this Tag."
    else
      # See if this Tag already exists, otherwise create it
      tag_to_update = tag_resource.tags.find(:first,
      :conditions => {:key => rs_tag[:key]})
      tag_to_update ||= Tag.new(:account => acc)

      # Asssociations - link this Tag to its account
      tag_to_update. = acc
      acc.tags << tag_to_update
      # Asssociations - link this tag to its AWS resource
      tag_to_update.resource = tag_resource
      tag_resource.tags << tag_to_update
      tag_to_update.update_from_right_hash(rs_tag)
      tag_to_update.save
    end
  end
  acc.log.info "Account '#{acc.name}' reports #{right_aws_array.count} tags"
end

Instance Method Details

#update_from_right_hash(right_hash) ⇒ Object 



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# File 'lib/aws_tracker/models/tag.rb', line 60

def update_from_right_hash(right_hash)
  self.key            = right_hash[:key]
  self.value          = right_hash[:value]
end