Class: AWS::AutoScaling::NotificationConfigurationCollection

Inherits:
Object
  • Object
show all
Includes:
Core::Collection::Limitable
Defined in:
lib/aws/auto_scaling/notification_configuration_collection.rb

Overview

Allows you to enumerate and create notification configurations.#

Enumerating Notification Configurations

You can enumerated ALL configurations from the AWS::AutoScaling class.

auto_scaling = AWS::AutoScaling.new
auto_scaling.notification_configurations.each do |config|
  # ...
end

You can also limit them to a single Auto Scaling group:

group = auto_scaling.groups['group-name']
group.notification_configurations.each do |config|
  # ...
end

Creating Notification Configurations

You can create a notification configuration like so:

auto_scaling.notification_configurations.create(
  :group => 'auto-scaling-group-name',
  :topic => 'sns-topic-arn')

Just like with enumeration, you can create them from the Auto Scaling group:

group.notification_configurations.create(:topic => 'sns-topic-arn')

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Core::Collection::Limitable

#each_batch

Methods included from Core::Collection

#each_batch, #enum, #first, #in_groups_of, #page

Instance Attribute Details

#group ⇒ Group? (readonly) Also known as: auto_scaling_group

Returns If this collection was initialized with an Auto Scaling group, then that group is returned, nil otherwise.

Returns:

  • (Group, nil) —

    If this collection was initialized with an Auto Scaling group, then that group is returned, nil otherwise.



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# File 'lib/aws/auto_scaling/notification_configuration_collection.rb', line 64

def group
  @group
end

Instance Method Details

#create(options = {}) ⇒ NotificationConfiguration Also known as: put

Creates a new notification configuration. To create a notification configuration you need an SNS::Topic and an Auto Scaling Group.

auto_scaling.notification_configurations.create(
  :group => 'auto-scaling-group-name', 
  :topic => 'sns-topic-arn')

You can also create notification configurations from an Auto Scaling group and omit the :group option.

auto_scaling_group.notification_configurations.create(
  :topic => 'sns-topic-arn')

You may also pass a list of notification types to publish to the topic. If you omit this option, then all notification types will be configured.

# publish only these two specific notification types
auto_scaling_group.notification_configurations.create(
  :topic => 'sns-topic-arn',
  :types => [
    'autoscaling:EC2_INSTANCE_LAUNCH',
    'autoscaling:EC2_INSTANCE_TERMINATE',
  ]
)

Parameters:

  • options (Hash) (defaults to: {})

Options Hash (options):

  • :topic (required, SNS::Topic, String) —

    An SNS::Topic object or a topic arn string. Notifications will be published to this topic.

  • :group (Group, String) —

    An Auto Scaling Group object or the name of an Auto Scaling group. This is required if you this collection is not scoped by a Group.

  • :types (Array<String>) —

    A list of notification types that should publish messages to the given topic.

Returns:



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# File 'lib/aws/auto_scaling/notification_configuration_collection.rb', line 109

def create options = {}
  
  topic_arn = options[:topic].is_a?(SNS::Topic) ? 
    options[:topic].arn : options[:topic]

  unless group = @group
    if group = options[:group]
      group = Group.new(group) unless group.is_a?(Group)
    else
      raise ArgumentError, 'missing required :group option'
    end
  end

  unless types = options[:types]
    types = AutoScaling.new(:config => config).notification_types
  end

  notification_config = NotificationConfiguration.new(group, topic_arn)
  notification_config.notification_types = types
  notification_config

end

#each {|notification_config| ... } ⇒ Object

Yields:

  • (notification_config)

Yield Parameters:



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# File 'lib/aws/auto_scaling/notification_configuration_collection.rb', line 135

def each &block

  #
  # <grumble> We can't use the standard pageable collection mixin here.
  # When you provide :max_records it returns each notification
  # type as an individual record, instead of notification configurations
  # with grouped types.  This makes it very possible to
  # get a part of a configuration in one page of results with the
  # rest in the next page.
  #
  # So instead we will request and group them all before yielding.
  # 

  next_token = nil

  groups = {}

  begin

    client_opts = {}
    client_opts[:next_token] = next_token if next_token
    client_opts[:auto_scaling_group_names] = [@group.name] if @group

    resp = client.describe_notification_configurations(client_opts)
    resp.notification_configurations.each do |c|
      group_name = c.auto_scaling_group_name
      groups[group_name] ||= {}
      groups[group_name][c.topic_arn] ||= []
      groups[group_name][c.topic_arn] << c.notification_type
    end

    next_token = resp.data[:next_token]

  end while next_token

  groups.each_pair do |group_name, topics|
    topics.each_pair do |topic_arn, types|
      
      notification_config = NotificationConfiguration.new(
        Group.new(group_name, :config => config), topic_arn, types)

      yield(notification_config)

    end
  end

end