Custom Decorator Sample

This sample shows a custom decorator can help with Temporal code reuse. Specifically, this makes a @auto_heartbeater decorator that automatically configures an activity to heartbeat twice as frequently as the heartbeat timeout is set to.

To run, first see README.md for prerequisites. Then, run the following from this directory to start the worker:

uv run worker.py

This will start the worker. Then, in another terminal, run the following to execute the workflow:

uv run starter.py

The workflow will be started, and then after 5 seconds will be sent a signal to cancel its forever-running activity. The activity has a heartbeat timeout set to 2s, so since it has the @auto_heartbeater decorator set, it will heartbeat every second. If this was not set, the workflow would fail with an activity heartbeat timeout failure.