Uploaded June 2025 | Updated September 2026, 1 week ago

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In this video, you'll learn how to properly configure and wire up a CosmosClient using FastAPI's dependency injection system. Instead of creating new connections for every request, we'll implement a singleton pattern with connection pooling that scales efficiently and integrates seamlessly with Azure Functions.

What You'll Learn:

• Connection pooling fundamentals and why every CosmosClient creates its own pool
• The performance difference between one connection pool versus hundreds
• Singleton CosmosClient pattern using global variables and lazy initialization
• Clean FastAPI dependency injection setup for database connections
• Azure Functions integration patterns that work in production

Presenter Gwyneth Peña-Siguenza

Links:
• Code Repository: github.com/madebygps/cosmosdb-fastapi-functions
• Azure Functions Best Practices: learn.microsoft.com/en-us/azure/azure-functions/functions-best-practices
• Azure Cosmos DB Python Best Practices: learn.microsoft.com/en-us/azure/cosmos-db/nosql/best-practice-python
• FastAPI Dependency Injection: fastapi.tiangolo.com/tutorial/dependencies
• Subscribe to Azure Cosmos DB on YouTube – youtube.com/AzureCosmosDB
• Follow Azure Cosmos DB on X – twitter.com/AzureCosmosDB
• Follow Azure Cosmos DB on LinkedIn – linkedin.com/company/azure-cosmos-db

#Python #AzureCosmosDB #Azure #NoSQL #DatabaseTutorial #PythonSDK