def inner_wrapper(*args, **kwargs):
try:
ctx = next(arg for arg in args[:2] if isinstance(arg, Context))
except StopIteration:
raise RuntimeError('the first positional argument to {}() has to be a Context '
'instance'.format(callable_name(func))) from None
executor = ctx.require_resource(Executor, resource_name)
return asyncio_extras.call_in_executor(func, *args, executor=executor, **kwargs)
def inner_wrapper(*args, **kwargs):
try:
ctx = next(arg for arg in args[:2] if isinstance(arg, Context))
except StopIteration:
raise RuntimeError(
'the first positional argument to {}() has to be a Context '
'instance'.format(callable_name(func))) from None
executor = ctx.require_resource(Executor, resource_name)
return asyncio_extras.call_in_executor(func,
*args,
executor=executor,
**kwargs)
def call_in_executor(self, func: Callable, *args, executor: Union[Executor, str] = None,
**kwargs) -> Awaitable:
"""
Call the given callable in an executor.
:param func: the callable to call
:param args: positional arguments to call the callable with
:param executor: either an :class:`~concurrent.futures.Executor` instance, the resource
name of one or ``None`` to use the event loop's default executor
:param kwargs: keyword arguments to call the callable with
:return: an awaitable that resolves to the return value of the call
"""
assert check_argument_types()
if isinstance(executor, str):
executor = self.require_resource(Executor, executor)
return asyncio_extras.call_in_executor(func, *args, executor=executor, **kwargs)
def call_in_executor(self,
func: Callable,
*args,
executor: Union[Executor, str] = None,
**kwargs) -> Awaitable:
"""
Call the given callable in an executor.
:param func: the callable to call
:param args: positional arguments to call the callable with
:param executor: either an :class:`~concurrent.futures.Executor` instance, the resource
name of one or ``None`` to use the event loop's default executor
:param kwargs: keyword arguments to call the callable with
:return: an awaitable that resolves to the return value of the call
"""
assert check_argument_types()
if isinstance(executor, str):
executor = self.require_resource(Executor, executor)
return asyncio_extras.call_in_executor(func,
*args,
executor=executor,
**kwargs)