Eternal and singleton orchestrations, stateful entities, and task hubs

Let's now focus on some more advanced features of Durable Functions. In this section, we will cover things such as infinite orchestrations, entity functions, and aggregating all the components into a single hub.

Eternal orchestrations

By default, in Durable Functions, each orchestration ends at some point. You can think about it as a line from point A to point B – between those points, you will have multiple activities, which can be called and replayed. Once you reach point B, the workflow ends, and you must start from the beginning.

To overcome that problem, you could probably implement an infinite loop. While the idea is correct, you need to take into consideration the history of your orchestration. If you leverage a loop inside your orchestration, the history will grow infinitely. As this is undesirable, eternal orchestrations were introduced to grant you the possibility to run an orchestration...