Connecting Azure Functions to Cosmos DB
Explore how to integrate Azure Functions with Cosmos DB by using triggers, input, and output bindings to build event-driven serverless architectures. Understand how to listen for container changes, query documents, and add new items automatically.
Azure Functions
Cosmos DB works exceptionally well in a serverless architecture thanks to its change feed and binding for Azure Functions. In this lesson, we’ll see a realistic example of architecture and code for the following:
Triggers
Input binding
Output binding
Triggers
A trigger starts an Azure Function. For example, a trigger can be an HTTP request or a timer. In our case, we want to listen to container changes, and to do so, we need to use CosmosDBTrigger. The function is called automatically when documents change in a container.
The trigger requires some parameters to work:
databaseName...