def get_default_executor_class() -> type:
"""
Returns the `Executor` class specified in
`prefect.config.engine.executor.default_class`. If the value is a string, it will
attempt to load the already-imported object. Otherwise, the value is returned.
Defaults to `SynchronousExecutor` if the string config value can not be loaded
"""
config_value = config.get_nested("engine.executor.default_class")
if isinstance(config_value, str):
try:
return prefect.utilities.serialization.from_qualified_name(
config_value)
except ValueError:
warn("Could not import {}; using "
"prefect.engine.executors.LocalExecutor instead.".format(
config_value))
return prefect.engine.executors.LocalExecutor
else:
return config_value
def get_default_storage_class() -> type:
"""
Returns the `Storage` class specified in
`prefect.config.flows.defaults.storage.default_class`. If the value is a string, it will
attempt to load the already-imported object. Otherwise, the value is returned.
Defaults to `Docker` if the string config value can not be loaded
"""
config_value = config.get_nested("flows.defaults.storage.default_class")
if isinstance(config_value, str):
try:
return prefect.utilities.serialization.from_qualified_name(
config_value)
except ValueError:
warn("Could not import {}; using "
"prefect.environments.storage.Docker instead.".format(
config_value))
return Docker
else:
return config_value
def get_default_result_handler_class() -> type:
"""
Returns the `ResultHandler` class specified in `prefect.config.engine.result_handler.default_class` If the
value is a string, it will attempt to load the already-imported object. Otherwise, the
value is returned.
Defaults to `None` if the string config value can not be loaded
"""
config_value = config.get_nested("engine.result_handler.default_class")
if isinstance(config_value, str):
if not config_value:
return lambda *args, **kwargs: None # type: ignore
try:
return prefect.utilities.serialization.from_qualified_name(
config_value)
except ValueError:
warn("Could not import {}; using "
"None instead.".format(config_value))
return lambda *args, **kwargs: None # type: ignore
else:
return config_value