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pc_rpc: raise AttributeError immediately for nonexistent RPC methods. Closes #534
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@ -10,6 +10,9 @@ Release notes
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ARTIQ_APPLET_EMBED. The GUI sets this enviroment variable itself and the
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user simply needs to remove the --embed argument.
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* EnvExperiment's prepare calls prepare for all its children.
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* Dynamic __getattr__'s returning RPC target methods are not supported anymore.
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Controller driver classes must define all their methods intended for RPC as
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members.
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2.0rc1
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@ -41,7 +41,7 @@ class Controller:
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await remote.connect_rpc(self.host, self.port, None)
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try:
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targets, _ = remote.get_rpc_id()
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remote.select_rpc_target(targets[0])
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await remote.select_rpc_target(targets[0])
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r = await getattr(remote, method)(*args, **kwargs)
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finally:
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remote.close_rpc()
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@ -1,5 +1,6 @@
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import threading
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import logging
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import inspect
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logger = logging.getLogger(__name__)
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@ -20,6 +21,9 @@ class FFProxy:
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"""
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def __init__(self, target):
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self.target = target
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valid_methods = inspect.getmembers(target, inspect.ismethod)
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self._valid_methods = {m[0] for m in valid_methods}
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self._thread = None
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def ff_join(self):
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@ -28,6 +32,8 @@ class FFProxy:
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self._thread.join()
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def __getattr__(self, k):
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if k not in self._valid_methods:
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raise AttributeError
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def run_in_thread(*args, **kwargs):
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if self._thread is not None and self._thread.is_alive():
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logger.warning("skipping fire-and-forget call to %r.%s as "
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@ -94,8 +94,6 @@ class Client:
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in the middle of a RPC can break subsequent RPCs (from the same
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client).
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"""
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kernel_invariants = set()
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def __init__(self, host, port, target_name=AutoTarget, timeout=None):
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self.__socket = socket.create_connection((host, port), timeout)
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@ -106,6 +104,7 @@ class Client:
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self.__target_names = server_identification["targets"]
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self.__description = server_identification["description"]
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self.__selected_target = None
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self.__valid_methods = set()
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if target_name is not None:
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self.select_rpc_target(target_name)
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except:
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@ -118,6 +117,7 @@ class Client:
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target_name = _validate_target_name(target_name, self.__target_names)
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self.__socket.sendall((target_name + "\n").encode())
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self.__selected_target = target_name
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self.__valid_methods = self.__recv()
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def get_selected_target(self):
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"""Returns the selected target, or ``None`` if no target has been
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@ -173,6 +173,8 @@ class Client:
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return self.__do_action(obj)
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def __getattr__(self, name):
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if name not in self.__valid_methods:
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raise AttributeError
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def proxy(*args, **kwargs):
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return self.__do_rpc(name, args, kwargs)
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return proxy
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@ -187,8 +189,6 @@ class AsyncioClient:
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Concurrent access from different asyncio tasks is supported; all calls
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use a single lock.
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"""
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kernel_invariants = set()
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def __init__(self):
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self.__lock = asyncio.Lock()
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self.__reader = None
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@ -208,19 +208,21 @@ class AsyncioClient:
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self.__target_names = server_identification["targets"]
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self.__description = server_identification["description"]
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self.__selected_target = None
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self.__valid_methods = set()
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if target_name is not None:
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self.select_rpc_target(target_name)
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await self.select_rpc_target(target_name)
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except:
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self.close_rpc()
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raise
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def select_rpc_target(self, target_name):
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async def select_rpc_target(self, target_name):
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"""Selects a RPC target by name. This function should be called
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exactly once if the connection was created with ``target_name=None``.
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"""
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target_name = _validate_target_name(target_name, self.__target_names)
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self.__writer.write((target_name + "\n").encode())
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self.__selected_target = target_name
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self.__valid_methods = await self.__recv()
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def get_selected_target(self):
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"""Returns the selected target, or ``None`` if no target has been
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@ -273,6 +275,8 @@ class AsyncioClient:
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self.__lock.release()
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def __getattr__(self, name):
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if name not in self.__valid_methods:
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raise AttributeError
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async def proxy(*args, **kwargs):
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res = await self.__do_rpc(name, args, kwargs)
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return res
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@ -292,8 +296,6 @@ class BestEffortClient:
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:param retry: Amount of time to wait between retries when reconnecting
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in the background.
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"""
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kernel_invariants = set()
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def __init__(self, host, port, target_name,
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firstcon_timeout=1.0, retry=5.0):
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self.__host = host
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@ -303,6 +305,7 @@ class BestEffortClient:
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self.__conretry_terminate = False
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self.__socket = None
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self.__valid_methods = set()
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try:
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self.__coninit(firstcon_timeout)
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except:
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@ -327,6 +330,7 @@ class BestEffortClient:
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target_name = _validate_target_name(self.__target_name,
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server_identification["targets"])
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self.__socket.sendall((target_name + "\n").encode())
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self.__valid_methods = self.__recv()
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def __start_conretry(self):
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self.__conretry_thread = threading.Thread(target=self.__conretry)
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@ -401,6 +405,8 @@ class BestEffortClient:
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raise ValueError
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def __getattr__(self, name):
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if name not in self.__valid_methods:
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raise AttributeError
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def proxy(*args, **kwargs):
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return self.__do_rpc(name, args, kwargs)
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return proxy
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@ -558,6 +564,12 @@ class Server(_AsyncioServer):
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if callable(target):
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target = target()
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valid_methods = inspect.getmembers(target, inspect.ismethod)
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valid_methods = {m[0] for m in valid_methods}
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if self.builtin_terminate:
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valid_methods.add("terminate")
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writer.write((pyon.encode(valid_methods) + "\n").encode())
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while True:
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line = await reader.readline()
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if not line:
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@ -33,7 +33,7 @@ class ControllerCase(unittest.TestCase):
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remote = AsyncioClient()
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await remote.connect_rpc(host, port, None)
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targets, _ = remote.get_rpc_id()
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remote.select_rpc_target(targets[0])
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await remote.select_rpc_target(targets[0])
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self.addCleanup(remote.close_rpc)
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return remote
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@ -46,7 +46,7 @@ class RPCCase(unittest.TestCase):
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test_object_back = remote.async_echo(test_object)
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self.assertEqual(test_object, test_object_back)
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with self.assertRaises(AttributeError):
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remote.non_existing_method()
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remote.non_existing_method
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remote.terminate()
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finally:
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remote.close_rpc()
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@ -73,7 +73,7 @@ class RPCCase(unittest.TestCase):
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test_object_back = await remote.async_echo(test_object)
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self.assertEqual(test_object, test_object_back)
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with self.assertRaises(AttributeError):
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await remote.non_existing_method()
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await remote.non_existing_method
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await remote.terminate()
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finally:
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remote.close_rpc()
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@ -101,6 +101,8 @@ class FireAndForgetCase(unittest.TestCase):
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self.ok = False
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p = fire_and_forget.FFProxy(self)
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p._set_ok()
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with self.assertRaises(AttributeError):
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p.non_existing_method
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p.ff_join()
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self.assertTrue(self.ok)
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