def register_event_topic(DirectoryId=None, TopicName=None):
    """
    Associates a directory with an SNS topic. This establishes the directory as a publisher to the specified SNS topic. You can then receive email or text (SMS) messages when the status of your directory changes. You get notified if your directory goes from an Active status to an Impaired or Inoperable status. You also receive a notification when the directory returns to an Active status.
    See also: AWS API Documentation
    
    
    :example: response = client.register_event_topic(
        DirectoryId='string',
        TopicName='string'
    )
    
    
    :type DirectoryId: string
    :param DirectoryId: [REQUIRED]
            The Directory ID that will publish status messages to the SNS topic.
            

    :type TopicName: string
    :param TopicName: [REQUIRED]
            The SNS topic name to which the directory will publish status messages. This SNS topic must be in the same region as the specified Directory ID.
            

    :rtype: dict
    :return: {}
    
    
    """
    pass
