1. Scalable Topic Modeling with Amazon SNS


    To perform scalable topic modeling with Amazon SNS (Simple Notification Service), you will need to set up an SNS topic that applications can publish messages to and subscribers can then receive notifications from. The SNS topic acts as a communication channel. Scalability is one of the key features of SNS, allowing you to distribute messages to a large number of subscribers, including AWS Lambda functions, HTTP endpoints, email addresses, and other AWS services.

    Here's how you can create an SNS Topic using Pulumi:

    1. Set up the Pulumi AWS SDK: Import the SDK to be able to interact with AWS resources.
    2. Create an SNS Topic: Define an SNS topic using the aws.sns.Topic class.
    3. Create SNS Subscriptions: To receive messages from the topic, create subscriptions for your endpoints.

    Below is a Pulumi program written in Python that sets up an SNS topic. I'll explain each section of the code as comments within the code block.

    import pulumi import pulumi_aws as aws # Create an SNS topic for publishing messages. topic = aws.sns.Topic("my_topic", display_name="MyTopicDisplayName") # Optionally, if you have known subscribers, like an email address or an AWS Lambda function, # you can immediately set up a subscription to this topic. Here’s an example of creating an # email subscription: email_subscription = aws.sns.TopicSubscription("my_topic_subscription", topic=topic.arn, protocol="email", endpoint="example@example.com") # Replace with your email # Export the name of the topic and the email subscription ARN. # These exports will allow us to see the results after you run `pulumi up`. pulumi.export('topic_name', topic.id) pulumi.export('subscription_email', email_subscription.id)

    To understand more about what each part of the program does:

    • aws.sns.Topic: This resource is used to create a new SNS topic where messages can be published. The topic acts as a hub between the message publisher and the subscribers.
    • aws.sns.TopicSubscription: Represents a subscription to an SNS topic. The protocol here is "email" but can also be other types, such as "lambda" for invoking AWS Lambda functions, "http" for HTTP endpoints, and more.
    • pulumi.export: Outputs that can be viewed after deployment, useful for accessing endpoints or references outside of Pulumi.

    Once you run this Pulumi code, it sets up the AWS SNS topic and an email subscription. Any message published to this SNS topic would be sent to the email address provided.

    However, remember that for an email subscription, AWS SNS will send a confirmation email first, and the subscription will not be active until you confirm it. You need to replace "example@example.com" with the actual email address that should receive notifications.

    Also, ensure that you have the AWS Pulumi provider configured correctly with the required AWS access keys and region in which you want to create these resources. Pulumi reads your AWS configuration from the environment, similar to how the AWS CLI works. This program assumes that your environment is already set up for the target AWS account and region.