Mateusz Mandera e90866876c queue: Take advantage of ABC for defining abstract worker base classes. ... QueueProcessingWorker and LoopQueueProcessingWorker are abstract classes meant to be subclassed by a class that will define its own consume() or consume_batch() method. ABCs are suited for that and we can tag consume/consume_batch with the @abstractmethod wrapper which will prevent subclasses that don't define these methods properly to be impossible to even instantiate (as opposed to only crashing once consume() is called). It's also nicely detected by mypy, which will throw errors such as this on invalid use: error: Only concrete class can be given where "Type[TestWorker]" is expected error: Cannot instantiate abstract class 'TestWorker' with abstract attribute 'consume' Due to it being detected by mypy, we can remove the test test_worker_noconsume which just tested the old version of this - raising an exception when the unimplemented consume() gets called. Now it can be handled already on the linter level.		2019-12-28 10:52:17 -08:00
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__init__.py	Add new system for defining and running queue-processing workers	2013-09-24 20:44:15 -04:00
queue_processors.py	queue: Take advantage of ABC for defining abstract worker base classes.	2019-12-28 10:52:17 -08:00