First try: pack cancelled tracebacks and ship to caller
Tyler Goodlet
parent
3423ea4011
commit
c2484e88a1
|
|
@ -60,6 +60,9 @@ async def _invoke(
|
|||
"""
|
||||
treat_as_gen = False
|
||||
|
||||
# possible a traceback (not sure what typing is for this..)
|
||||
tb = None
|
||||
|
||||
cancel_scope = trio.CancelScope()
|
||||
cs: trio.CancelScope = None
|
||||
|
||||
|
|
@ -156,14 +159,26 @@ async def _invoke(
|
|||
ctx._scope_nursery = scope_nursery
|
||||
cs = scope_nursery.cancel_scope
|
||||
task_status.started(cs)
|
||||
await chan.send({'return': await coro, 'cid': cid})
|
||||
try:
|
||||
await chan.send({'return': await coro, 'cid': cid})
|
||||
except trio.Cancelled as err:
|
||||
tb = err.__traceback__
|
||||
|
||||
if cs.cancelled_caught:
|
||||
if ctx._cancel_called:
|
||||
msg = f'{func.__name__} cancelled itself',
|
||||
|
||||
else:
|
||||
msg = f'{func.__name__} was remotely cancelled',
|
||||
# TODO: pack in ``trio.Cancelled.__traceback__`` here
|
||||
# so they can be unwrapped and displayed on the caller
|
||||
# side!
|
||||
|
||||
fname = func.__name__
|
||||
if ctx._cancel_called:
|
||||
msg = f'{fname} cancelled itself'
|
||||
|
||||
elif cs.cancel_called:
|
||||
msg = (
|
||||
f'{fname} was remotely cancelled by its caller '
|
||||
f'{ctx.chan.uid}'
|
||||
)
|
||||
|
||||
# task-contex was cancelled so relay to the cancel to caller
|
||||
raise ContextCancelled(
|
||||
|
|
@ -196,7 +211,7 @@ async def _invoke(
|
|||
log.exception("Actor crashed:")
|
||||
|
||||
# always ship errors back to caller
|
||||
err_msg = pack_error(err)
|
||||
err_msg = pack_error(err, tb=tb)
|
||||
err_msg['cid'] = cid
|
||||
try:
|
||||
await chan.send(err_msg)
|
||||
|
|
@ -223,7 +238,7 @@ async def _invoke(
|
|||
f"Task {func} likely errored or cancelled before it started")
|
||||
finally:
|
||||
if not actor._rpc_tasks:
|
||||
log.info("All RPC tasks have completed")
|
||||
log.runtime("All RPC tasks have completed")
|
||||
actor._ongoing_rpc_tasks.set()
|
||||
|
||||
|
||||
|
|
@ -238,10 +253,10 @@ _lifetime_stack: ExitStack = ExitStack()
|
|||
class Actor:
|
||||
"""The fundamental concurrency primitive.
|
||||
|
||||
An *actor* is the combination of a regular Python or
|
||||
``multiprocessing.Process`` executing a ``trio`` task tree, communicating
|
||||
An *actor* is the combination of a regular Python process
|
||||
executing a ``trio`` task tree, communicating
|
||||
with other actors through "portals" which provide a native async API
|
||||
around "channels".
|
||||
around various IPC transport "channels".
|
||||
"""
|
||||
is_arbiter: bool = False
|
||||
|
||||
|
|
@ -396,7 +411,7 @@ class Actor:
|
|||
self._no_more_peers = trio.Event() # unset
|
||||
|
||||
chan = Channel(stream=stream)
|
||||
log.info(f"New connection to us {chan}")
|
||||
log.runtime(f"New connection to us {chan}")
|
||||
|
||||
# send/receive initial handshake response
|
||||
try:
|
||||
|
|
@ -427,8 +442,12 @@ class Actor:
|
|||
event.set()
|
||||
|
||||
chans = self._peers[uid]
|
||||
|
||||
# TODO: re-use channels for new connections instead
|
||||
# of always new ones; will require changing all the
|
||||
# discovery funcs
|
||||
if chans:
|
||||
log.warning(
|
||||
log.runtime(
|
||||
f"already have channel(s) for {uid}:{chans}?"
|
||||
)
|
||||
log.trace(f"Registered {chan} for {uid}") # type: ignore
|
||||
|
|
@ -664,7 +683,7 @@ class Actor:
|
|||
else:
|
||||
# mark that we have ongoing rpc tasks
|
||||
self._ongoing_rpc_tasks = trio.Event()
|
||||
log.info(f"RPC func is {func}")
|
||||
log.runtime(f"RPC func is {func}")
|
||||
# store cancel scope such that the rpc task can be
|
||||
# cancelled gracefully if requested
|
||||
self._rpc_tasks[(chan, cid)] = (
|
||||
|
|
@ -673,7 +692,7 @@ class Actor:
|
|||
# self.cancel() was called so kill this msg loop
|
||||
# and break out into ``_async_main()``
|
||||
log.warning(
|
||||
f"{self.uid} was remotely cancelled; "
|
||||
f"Actor {self.uid} was remotely cancelled; "
|
||||
"waiting on cancellation completion..")
|
||||
await self._cancel_complete.wait()
|
||||
loop_cs.cancel()
|
||||
|
|
@ -1141,7 +1160,7 @@ class Actor:
|
|||
raise ValueError(f"{uid} is not a valid uid?!")
|
||||
|
||||
chan.uid = uid
|
||||
log.info(f"Handshake with actor {uid}@{chan.raddr} complete")
|
||||
log.runtime(f"Handshake with actor {uid}@{chan.raddr} complete")
|
||||
return uid
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -56,13 +56,22 @@ class NoRuntime(RuntimeError):
|
|||
"The root actor has not been initialized yet"
|
||||
|
||||
|
||||
def pack_error(exc: BaseException) -> Dict[str, Any]:
|
||||
def pack_error(
|
||||
exc: BaseException,
|
||||
tb = None,
|
||||
|
||||
) -> Dict[str, Any]:
|
||||
"""Create an "error message" for tranmission over
|
||||
a channel (aka the wire).
|
||||
"""
|
||||
if tb:
|
||||
tb_str = ''.join(traceback.format_tb(tb))
|
||||
else:
|
||||
tb_str = traceback.format_exc()
|
||||
|
||||
return {
|
||||
'error': {
|
||||
'tb_str': traceback.format_exc(),
|
||||
'tb_str': tb_str,
|
||||
'type_str': type(exc).__name__,
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue