SNS subscriptions

• When you create a new subscription for a SNS topic, you can specify:
  • Subscription filter policy
    • filters the messages that a subscriber receives based on message attributes and message body
    • Sample use case: you can create one SNS topic, and multiple SQS queues subscribed to the topic, set the filter policies in the SNS subscription to publish messages to designated SQS queue
  • Redrive policy (dead letter queue)
    • send undelivered messages to a dead letter queue
• Subscription protocols
  • Standard topic:
    • SQS
    • AWS Lambda
    • SMS
    • Amazon Kinesis Data Firehose
    • Email / Email-JSON
    • HTTP/HTTPS
    • Platform application Endpoint
  • FIFO topic:
    • SQS (standard queue or FIFO queue)
      • Strict message ordering and deduplication are guaranteed only when delivering to SQS FIFO queues.