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Introduction to Amazon Simple Notification Service (Amazon SNS)

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  3. AWS Certified Solutions Architect Associate (SAA-C03)
  5. Introduction to Amazon Simple Notification Service (Amazon SNS)
  • a web service for mobile and enterprise messaging to set up, operate, and send notifications.
  • SNS follows the publish-subscribe (pub-sub) messaging paradigm
  • notifications delivered to clients using a push mechanism
  • no need to check periodically (or poll) for new information and updates.
  • A Pub/Sub messaging and mobile notifications for
    • Microservices
    • distributed systems
    •  serverless applications
  • It makes it simple and cost effective to send push notifications to iOS and Android based devices.
  • It supports
    • HTTP/HTTPS
    • Email/Email-JSON
    • SMS
    • Amazon Simple Queue Service (SQS) queues,
    • AWS Lambda functions.
  • two clients types– Publishers and Subscribers (or producers and consumers).
  • Publishers communicate to subscribers asynchronously by sending a message to a topic.
  • topic is logical access communication channel having list of subscribers and methods to communicate to them.
  • If a message is sent to a topic, it is automatically forwarded to each subscriber of that topic.
  • Methods to deliver can be SQS, HTTP, HTTPS, email, SMS, and AWS Lambda
  • Below process at a high level is shown

Common Scenarios for Amazon SNS

  • SNS supports various  needs like
    • monitoring applications
    • workflow systems
    • time-sensitive information updates
    • mobile applications
    • any other application which generates or consumes notifications

Fanout Scenario

  • SNS message is sent to a topic and then replicated and pushed to SQS queues, HTTP endpoints, or email addresses.
  • Supports parallel synchronous processing
  • Then SQS queues subscribed to that topic will receive identical notifications for the new order.
  • An EC2 instance attached to a queue handle processing or fulfillment of the order,
  • EC2 instance attached to a parallel queue sends order data to a data warehouse application/service for analysis.

Application and System Alerts Scenario

  • refer to SMS or email notifications triggered by predefined thresholds
  • Like notification when specific change to Auto Scaling group in AWS.

Push Email and Text Messaging Scenario

  • Push email and text messaging transmit messages to individuals or groups through email and/or SMS.
  • Example – push targeted news headlines to subscribers by email or SMS.

Mobile Push Notifications Scenario

  • send messages directly to mobile applications.
  • Example notifications if an update is available.
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