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b2d7bc40dc
* Add tests for legacy Script helper behavior
* Add Script helper if_running and run_mode options
- if_running controls what happens if Script run while previous run
has not completed. Can be:
- error: Raise an exception
- ignore: Return without doing anything (previous run continues as-is)
- parallel: Start run in new task
- restart: Stop previous run before starting new run
- run_mode controls when call to async_run will return. Can be:
- background: Returns immediately
- legacy: Implements previous behavior, which is to return when done,
or when suspended by delay or wait_template
- blocking: Returns when run has completed
- If neither is specified, default is run_mode=legacy (and if_running
is not used.) Otherwise, defaults are if_running=parallel and
run_mode=background. If run_mode is set to legacy then if_running must
be None.
- Caller may supply a logger which will be used throughout instead of
default module logger.
- Move Script running state into new helper classes, comprised of an
abstract base class and two concrete clases, one for legacy behavior
and one for new behavior.
- Remove some non-async methods, as well as call_from_config which has
only been used in tests.
- Adjust tests accordingly.
* Change per review
- Change run_mode default from background to blocking.
- Make sure change listener is called, even when there's an unexpected
exception.
- Make _ScriptRun.async_stop more graceful by using an asyncio.Event for
signaling instead of simply cancelling Task.
- Subclass _ScriptRun for background & blocking behavior.
Also:
- Fix timeouts in _ScriptRun by converting timedeltas to float seconds.
- General cleanup.
* Change per review 2
- Don't propagate exceptions if call from user has already returned
(i.e., for background runs or legacy runs that have suspended.)
- Allow user to specify if exceptions should be logged. They will still
be logged regardless if exception is not propagated.
- Rename _start_script_delay and _start_wait_template_delay for
clarity.
- Remove return value from Script.async_run.
- Fix missing await.
- Change call to self.is_running in Script.async_run to direct test of
self._runs.
* Change per review 3 and add tests
- Remove Script.set_logger().
- Enhance existing tests to check all run modes.
- Add tests for new features.
- Fix a few minor bugs found by tests.