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Polling

Wait on external readiness with simple timers or backoff Step retries.

Problem and approach​

Here we demonstrate two basic and common design patterns for building Flows with Dex:

  1. Simple Polling Flow: This Flow periodically checks if a system is ready using a Timer condition, and proceeds to the next Step once the system is ready.

  2. Backoff Polling Flow: This Flow is an alternative approach to the Simple Polling Flow; it is using a retry mechanism (with exponential backoff) that proceeds to the next Step once a successful response is received from the (external) system/API.

Code examples​

Full runnable samples live under examples/{go,java,python,typescript} (HTTP prefix /design-pattern/... where applicable).

# See examples/python/dex_examples/patterns/workflow/polling/