Azure Event Grid facilitates building event-driven serverless apps that can effectively solve a real-time business problems with a focus on the core logic rather than the infrastructure. Event Grid is designed for high availability, consistent performance, and dynamic scale. Event Grid can simplify event-based apps, as this serves as a single service to manage routing of all events from any source to any destination. Before we proceed further, it is important to understand what an ‘event’ is.

Calling a flow from another flow is nothing new. Makers can wire up multiple flows using the HTTP Request Trigger and HTTP Action. While this is possible, it creates additional friction as makers have to manually construct request and response messages using JSON. Microsoft recently provided first-class support for calling a flow from another flow by introducing a new action called Run a Child Flow.