This document describes the current stable version of Celery (5.4). For development docs, go here.
celery.backends.base
¶
Result backend base classes.
BaseBackend
defines the interface.KeyValueStoreBackend
is a common base classusing K/V semantics like _get and _put.
- class celery.backends.base.BaseBackend(app, serializer=None, max_cached_results=None, accept=None, expires=None, expires_type=None, url=None, **kwargs)[source]¶
Base (synchronous) result backend.
- class celery.backends.base.DisabledBackend(app, serializer=None, max_cached_results=None, accept=None, expires=None, expires_type=None, url=None, **kwargs)[source]¶
Dummy result backend.
- get_many(*args, **kwargs)¶
- get_result(*args, **kwargs)¶
Get the result of a task.
- get_state(*args, **kwargs)¶
Get the state of a task.
- get_status(*args, **kwargs)¶
Get the state of a task.
- get_task_meta_for(*args, **kwargs)¶
- get_traceback(*args, **kwargs)¶
Get the traceback for a failed task.
- store_result(*args, **kwargs)[source]¶
Update task state and result.
if always_retry_backend_operation is activated, in the event of a recoverable exception, then retry operation with an exponential backoff until a limit has been reached.
- wait_for(*args, **kwargs)¶
Wait for task and return its result.
If the task raises an exception, this exception will be re-raised by
wait_for()
.- Raises:
celery.exceptions.TimeoutError – If timeout is not
None
, and the operation takes longer than timeout seconds.