APPLICATION INTEGRATION
Amazon SNS
A publish-and-subscribe service that pushes each published message from a topic to every matching subscription.
Also appears as
Amazon Simple Notification ServiceSNSCHOOSE IT WHEN
What job does it solve?
One event must fan out immediately to several independent destinations; use an SQS queue per subscriber when each copy must be retained and retried independently.
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Where does it stop?
One worker pool should process each job only once, or complex content-based event routing and event-bus governance are the deciding requirements.
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