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Baemin Self-Service Implements SSE to Deliver Weather-Related Temporary Delivery Zone Alerts

·2026.11.10 15:00

Key point

SSE adoption reduces polling load, while a zero-payload design resolves loss and ordering issues.

Details

  • Introduced SSE (Server-Sent Events) in Baemin Self-Service to push weather deterioration events to partners in real time
  • Eliminated unnecessary API calls from the polling method and delivered events to connections scattered across multiple pods via Kafka fan-out
  • Adopted a zero-payload approach that sends only identifiers without embedding state in the event, allowing the frontend to query the latest status via the REST API
  • Used a 30-second cache to aggregate concurrent queries and applied jitter and backoff upon reconnection to distribute server load
  • Zero discarded events in the last 30 days, lowering system complexity with a policy that tolerates loss
  • Suitable for environments requiring unidirectional communication and tolerating loss, but unsuitable for cases requiring bidirectional communication or integrity
kubernetesserver-sent-eventskafkassereal-time-notificationbaemin-self-servicezero-payload
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