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tractor
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Break `_mk_msg_type_err()` into recv/send side funcs 

Name them `_mk_send_mte()`/`_mk_recv_mte()` and change the runtime to
call each appropriately depending on location/usage.

Also add some dynamic call-frame "unhide" blocks such that when we
expect raised MTE from the aboves calls but we get a different
unexpected error from the runtime, we ensure the call stack downward is
shown in tbs/pdb.
|_ ideally in the longer run we come up with a fancier dynamic sys for
   this, prolly something in `.devx._frame_stack`?
runtime_to_msgspec
Tyler Goodlet 2024-06-17 13:12:16 -04:00
parent 8477919fc9
commit 711f639fc5
4 changed files with 174 additions and 162 deletions
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30
tractor/_context.py
View File

@ -49,7 +49,6 @@ from typing import (
Any,
AsyncGenerator,
Callable,
Mapping,
Type,
TypeAlias,
TYPE_CHECKING,
@ -1484,13 +1483,21 @@ class Context:
#
__tracebackhide__: bool = hide_tb
if validate_pld_spec:
msgops.validate_payload_msg(
pld_msg=started_msg,
pld_value=value,
ipc=self,
strict_pld_parity=strict_pld_parity,
hide_tb=hide_tb,
)
# TODO: prolly wrap this as a `show_frame_when_not()`
try:
msgops.validate_payload_msg(
pld_msg=started_msg,
pld_value=value,
ipc=self,
strict_pld_parity=strict_pld_parity,
hide_tb=hide_tb,
)
except BaseException as err:
if not isinstance(err, MsgTypeError):
__tracebackhide__: bool = False
raise
# TODO: maybe a flag to by-pass encode op if already done
# here in caller?
@ -2185,11 +2192,6 @@ async def open_context_from_portal(
try:
result_or_err: Exception|Any = await ctx.result()
except BaseException as berr:
# cancelled before (or maybe during?) final result capture
# if isinstance(trio.Cancelled, berr):
# from .devx import mk_pdb
# mk_pdb.set_trace()
# on normal teardown, if we get some error
# raised in `Context.result()` we still want to
# save that error on the ctx's state to
@ -2201,7 +2203,7 @@ async def open_context_from_portal(
ctx._local_error: BaseException = scope_err
raise
# yes! this worx Bp
# yes this worx!
# from .devx import _debug
# await _debug.pause()

258
tractor/_exceptions.py
View File

@ -1232,14 +1232,13 @@ def _raise_from_unexpected_msg(
_raise_from_no_key_in_msg = _raise_from_unexpected_msg
def _mk_msg_type_err(
def _mk_send_mte(
msg: Any|bytes|MsgType,
codec: MsgCodec|MsgDec,
message: str|None = None,
verb_header: str = '',
src_validation_error: ValidationError|None = None,
src_type_error: TypeError|None = None,
is_invalid_payload: bool = False,
@ -1247,131 +1246,148 @@ def _mk_msg_type_err(
) -> MsgTypeError:
'''
Compose a `MsgTypeError` from an input runtime context.
Compose a `MsgTypeError` from a `Channel.send()`-side error,
normally raised witih a runtime IPC `Context`.
'''
# `Channel.send()` case
if src_validation_error is None:
if isinstance(codec, MsgDec):
raise RuntimeError(
'`codec` must be a `MsgCodec` for send-side errors?'
)
if isinstance(codec, MsgDec):
raise RuntimeError(
'`codec` must be a `MsgCodec` for send-side errors?'
from tractor.devx import (
pformat_caller_frame,
)
# no src error from `msgspec.msgpack.Decoder.decode()` so
# prolly a manual type-check on our part.
if message is None:
tb_fmt: str = pformat_caller_frame(stack_limit=3)
message: str = (
f'invalid msg -> {msg}: {type(msg)}\n\n'
f'{tb_fmt}\n'
f'Valid IPC msgs are:\n\n'
f'{codec.msg_spec_str}\n',
)
elif src_type_error:
src_message: str = str(src_type_error)
patt: str = 'type '
type_idx: int = src_message.find('type ')
invalid_type: str = src_message[type_idx + len(patt):].split()[0]
enc_hook: Callable|None = codec.enc.enc_hook
if enc_hook is None:
message += (
'\n\n'
f"The current IPC-msg codec can't encode type `{invalid_type}` !\n"
f'Maybe a `msgpack.Encoder.enc_hook()` extension is needed?\n\n'
f'Check the `msgspec` docs for ad-hoc type extending:\n'
'|_ https://jcristharif.com/msgspec/extending.html\n'
'|_ https://jcristharif.com/msgspec/extending.html#defining-a-custom-extension-messagepack-only\n'
)
from tractor.devx import (
pformat_caller_frame,
msgtyperr = MsgTypeError(
message=message,
_bad_msg=msg,
)
# ya, might be `None`
msgtyperr.__cause__ = src_type_error
return msgtyperr
def _mk_recv_mte(
msg: Any|bytes|MsgType,
codec: MsgCodec|MsgDec,
message: str|None = None,
verb_header: str = '',
src_validation_error: ValidationError|None = None,
is_invalid_payload: bool = False,
**mte_kwargs,
) -> MsgTypeError:
'''
Compose a `MsgTypeError` from a
`Channel|Context|MsgStream.receive()`-side error,
normally raised witih a runtime IPC ctx or streaming
block.
'''
msg_dict: dict|None = None
bad_msg: PayloadMsg|None = None
if is_invalid_payload:
msg_type: str = type(msg)
any_pld: Any = msgpack.decode(msg.pld)
message: str = (
f'invalid `{msg_type.__qualname__}` msg payload\n\n'
f'value: `{any_pld!r}` does not match type-spec: '
f'`{type(msg).__qualname__}.pld: {codec.pld_spec_str}`'
)
# no src error from `msgspec.msgpack.Decoder.decode()` so
# prolly a manual type-check on our part.
if message is None:
tb_fmt: str = pformat_caller_frame(stack_limit=3)
message: str = (
f'invalid msg -> {msg}: {type(msg)}\n\n'
f'{tb_fmt}\n'
f'Valid IPC msgs are:\n\n'
f'{codec.msg_spec_str}\n',
)
elif src_type_error:
src_message: str = str(src_type_error)
patt: str = 'type '
type_idx: int = src_message.find('type ')
invalid_type: str = src_message[type_idx + len(patt):].split()[0]
bad_msg = msg
enc_hook: Callable|None = codec.enc.enc_hook
if enc_hook is None:
message += (
'\n\n'
f"The current IPC-msg codec can't encode type `{invalid_type}` !\n"
f'Maybe a `msgpack.Encoder.enc_hook()` extension is needed?\n\n'
f'Check the `msgspec` docs for ad-hoc type extending:\n'
'|_ https://jcristharif.com/msgspec/extending.html\n'
'|_ https://jcristharif.com/msgspec/extending.html#defining-a-custom-extension-messagepack-only\n'
)
msgtyperr = MsgTypeError(
message=message,
_bad_msg=msg,
)
# ya, might be `None`
msgtyperr.__cause__ = src_type_error
return msgtyperr
# `Channel.recv()` case
else:
msg_dict: dict|None = None
bad_msg: PayloadMsg|None = None
if is_invalid_payload:
msg_type: str = type(msg)
any_pld: Any = msgpack.decode(msg.pld)
message: str = (
f'invalid `{msg_type.__qualname__}` msg payload\n\n'
f'value: `{any_pld!r}` does not match type-spec: '
f'`{type(msg).__qualname__}.pld: {codec.pld_spec_str}`'
)
bad_msg = msg
else:
# decode the msg-bytes using the std msgpack
# interchange-prot (i.e. without any `msgspec.Struct`
# handling) so that we can determine what
# `.msg.types.PayloadMsg` is the culprit by reporting the
# received value.
msg: bytes
msg_dict: dict = msgpack.decode(msg)
msg_type_name: str = msg_dict['msg_type']
msg_type = getattr(msgtypes, msg_type_name)
message: str = (
f'invalid `{msg_type_name}` IPC msg\n\n'
)
# XXX be "fancy" and see if we can determine the exact
# invalid field such that we can comprehensively report
# the specific field's type problem.
msgspec_msg: str = src_validation_error.args[0].rstrip('`')
msg, _, maybe_field = msgspec_msg.rpartition('$.')
obj = object()
if (field_val := msg_dict.get(maybe_field, obj)) is not obj:
field_name_expr: str = (
f' |_{maybe_field}: {codec.pld_spec_str} = '
)
fmt_val_lines: list[str] = pformat(field_val).splitlines()
fmt_val: str = (
f'{fmt_val_lines[0]}\n'
+
textwrap.indent(
'\n'.join(fmt_val_lines[1:]),
prefix=' '*len(field_name_expr),
)
)
message += (
f'{msg.rstrip("`")}\n\n'
f'<{msg_type.__qualname__}(\n'
# f'{".".join([msg_type.__module__, msg_type.__qualname__])}\n'
f'{field_name_expr}{fmt_val}\n'
f')>'
)
if verb_header:
message = f'{verb_header} ' + message
msgtyperr = MsgTypeError.from_decode(
message=message,
bad_msg=bad_msg,
bad_msg_as_dict=msg_dict,
boxed_type=type(src_validation_error),
# NOTE: for pld-spec MTEs we set the `._ipc_msg` manually:
# - for the send-side `.started()` pld-validate
# case we actually raise inline so we don't need to
# set the it at all.
# - for recv side we set it inside `PldRx.decode_pld()`
# after a manual call to `pack_error()` since we
# actually want to emulate the `Error` from the mte we
# build here. So by default in that case, this is left
# as `None` here.
# ipc_msg=src_err_msg,
# decode the msg-bytes using the std msgpack
# interchange-prot (i.e. without any `msgspec.Struct`
# handling) so that we can determine what
# `.msg.types.PayloadMsg` is the culprit by reporting the
# received value.
msg: bytes
msg_dict: dict = msgpack.decode(msg)
msg_type_name: str = msg_dict['msg_type']
msg_type = getattr(msgtypes, msg_type_name)
message: str = (
f'invalid `{msg_type_name}` IPC msg\n\n'
)
msgtyperr.__cause__ = src_validation_error
return msgtyperr
# XXX be "fancy" and see if we can determine the exact
# invalid field such that we can comprehensively report
# the specific field's type problem.
msgspec_msg: str = src_validation_error.args[0].rstrip('`')
msg, _, maybe_field = msgspec_msg.rpartition('$.')
obj = object()
if (field_val := msg_dict.get(maybe_field, obj)) is not obj:
field_name_expr: str = (
f' |_{maybe_field}: {codec.pld_spec_str} = '
)
fmt_val_lines: list[str] = pformat(field_val).splitlines()
fmt_val: str = (
f'{fmt_val_lines[0]}\n'
+
textwrap.indent(
'\n'.join(fmt_val_lines[1:]),
prefix=' '*len(field_name_expr),
)
)
message += (
f'{msg.rstrip("`")}\n\n'
f'<{msg_type.__qualname__}(\n'
# f'{".".join([msg_type.__module__, msg_type.__qualname__])}\n'
f'{field_name_expr}{fmt_val}\n'
f')>'
)
if verb_header:
message = f'{verb_header} ' + message
msgtyperr = MsgTypeError.from_decode(
message=message,
bad_msg=bad_msg,
bad_msg_as_dict=msg_dict,
boxed_type=type(src_validation_error),
# NOTE: for pld-spec MTEs we set the `._ipc_msg` manually:
# - for the send-side `.started()` pld-validate
# case we actually raise inline so we don't need to
# set the it at all.
# - for recv side we set it inside `PldRx.decode_pld()`
# after a manual call to `pack_error()` since we
# actually want to emulate the `Error` from the mte we
# build here. So by default in that case, this is left
# as `None` here.
# ipc_msg=src_err_msg,
)
msgtyperr.__cause__ = src_validation_error
return msgtyperr

12
tractor/_ipc.py
View File

@ -49,7 +49,8 @@ from tractor._exceptions import (
MsgTypeError,
pack_from_raise,
TransportClosed,
_mk_msg_type_err,
_mk_send_mte,
_mk_recv_mte,
)
from tractor.msg import (
_ctxvar_MsgCodec,
@ -256,7 +257,7 @@ class MsgpackTCPStream(MsgTransport):
# and always raise such that spec violations
# are never allowed to be caught silently!
except msgspec.ValidationError as verr:
msgtyperr: MsgTypeError = _mk_msg_type_err(
msgtyperr: MsgTypeError = _mk_recv_mte(
msg=msg_bytes,
codec=codec,
src_validation_error=verr,
@ -321,7 +322,7 @@ class MsgpackTCPStream(MsgTransport):
if type(msg) not in msgtypes.__msg_types__:
if strict_types:
raise _mk_msg_type_err(
raise _mk_send_mte(
msg,
codec=codec,
)
@ -333,8 +334,9 @@ class MsgpackTCPStream(MsgTransport):
try:
bytes_data: bytes = codec.encode(msg)
except TypeError as typerr:
msgtyperr: MsgTypeError = _mk_msg_type_err(
except TypeError as _err:
typerr = _err
msgtyperr: MsgTypeError = _mk_send_mte(
msg,
codec=codec,
message=(

36
tractor/msg/_ops.py
View File

@ -47,7 +47,7 @@ from tractor._exceptions import (
InternalError,
_raise_from_unexpected_msg,
MsgTypeError,
_mk_msg_type_err,
_mk_recv_mte,
pack_error,
)
from tractor._state import current_ipc_ctx
@ -264,7 +264,7 @@ class PldRx(Struct):
# pack mgterr into error-msg for
# reraise below; ensure remote-actor-err
# info is displayed nicely?
mte: MsgTypeError = _mk_msg_type_err(
mte: MsgTypeError = _mk_recv_mte(
msg=msg,
codec=self.pld_dec,
src_validation_error=valerr,
@ -277,19 +277,6 @@ class PldRx(Struct):
if is_started_send_side:
raise mte
# XXX TODO: remove this right?
# => any bad stated/return values should
# always be treated a remote errors right?
#
# if (
# expect_msg is Return
# or expect_msg is Started
# ):
# # set emulated remote error more-or-less as the
# # runtime would
# ctx: Context = getattr(ipc, 'ctx', ipc)
# ctx._maybe_cancel_and_set_remote_error(mte)
# NOTE: the `.message` is automatically
# transferred into the message as long as we
# define it as a `Error.message` field.
@ -799,13 +786,18 @@ def validate_payload_msg(
# raise any msg type error NO MATTER WHAT!
except ValidationError as verr:
mte: MsgTypeError = _mk_msg_type_err(
msg=roundtripped,
codec=codec,
src_validation_error=verr,
verb_header='Trying to send ',
is_invalid_payload=True,
)
try:
mte: MsgTypeError = _mk_recv_mte(
msg=roundtripped,
codec=codec,
src_validation_error=verr,
verb_header='Trying to send ',
is_invalid_payload=True,
)
except BaseException:
__tracebackhide__: bool = False
raise
if not raise_mte:
return mte