Real-time cosmic chat
summary
A working demo chat (CosmosPark/CosmicChat) streams messages, typing indicators and map markers in near‑real time using Azure Cosmos DB change feed, Azure Functions, Event Grid, Azure Web PubSub and Static Web Apps. It duplicates documents into separate containers for different partition keys, uses soft‑delete plus TTL to detect deletes, and recommends Event Grid over many lease containers to scale. Demo runs serverless (expect cold starts) and broadcasts successfully via change feed to WebPubSub.
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chapters (13)
- 0:00Introduction
- 1:05Agenda
- 1:56Change Feed
- 5:50Scenarios
- 7:04Multiple listeners
- 8:07Leases
- 10:00Event Grid
- 10:52Publishing Realtime Events
- 12:10Azure Web for Subservice
- 13:19Architecture
- 16:45Descent
- 17:04Chat
- 19:48Demo
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