forked from goodboy/tractor
Add `MsgTypeError` "bad msg" capture
Such that if caught by user code and/or the runtime we can introspect the original msg which caused the type error. Previously this was kinda half-baked with a `.msg_dict` which was delivered from an `Any`-decode of the shuttle msg in `_mk_msg_type_err()` but now this more explicitly refines the API and supports both `PayloadMsg`-instance or the msg-dict style injection: - allow passing either of `bad_msg: PayloadMsg|None` or `bad_msg_as_dict: dict|None` to `MsgTypeError.from_decode()`. - expose public props for both ^ whilst dropping prior `.msgdict`. - rework `.from_decode()` to explicitly accept `**extra_msgdata: dict` |_ only overriding it from any `bad_msg_as_dict` if the keys are found in `_ipcmsg_keys`, **except** for `_bad_msg` when `bad_msg` is passed. |_ drop `.ipc_msg` passthrough. |_ drop `msgdict` input. - adjust `.cid` to only pull from the `.bad_msg` if set. Related fixes/adjustments: - `pack_from_raise()` should pull `boxed_type_str` from `boxed_type.__name__`, not the `type()` of it.. also add a `hide_tb: bool` flag. - don't include `_msg_dict` and `_bad_msg` in the `_body_fields` set. - allow more granular boxed traceback-str controls: |_ allow passing a `tb_str: str` explicitly in which case we use it verbatim and presume caller knows what they're doing. |_ when not provided, use the more explicit `traceback.format_exception(exc)` since the error instance is a required input (we still fail back to the old `.format_exc()` call if for some reason the caller passes `None`; but that should be a bug right?). |_ if a `tb: TracebackType` and a `tb_str` is passed, concat them. - in `RemoteActorError.pformat()` don't indent the `._message` part used for the `body` when `with_type_header == False`. - update `_mk_msg_type_err()` to use `bad_msg`/`bad_msg_as_dict` appropriately and drop passing `ipc_msg`.runtime_to_msgspec
parent
42ba855d1b
commit
eee4c61b51
tractor
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@ -22,6 +22,9 @@ from __future__ import annotations
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import builtins
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import builtins
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import importlib
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import importlib
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from pprint import pformat
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from pprint import pformat
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from types import (
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TracebackType,
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)
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from typing import (
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from typing import (
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Any,
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Any,
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Callable,
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Callable,
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@ -92,26 +95,30 @@ _ipcmsg_keys: list[str] = [
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fi.name
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fi.name
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for fi, k, v
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for fi, k, v
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in iter_fields(Error)
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in iter_fields(Error)
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]
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]
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_body_fields: list[str] = list(
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_body_fields: list[str] = list(
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set(_ipcmsg_keys)
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set(_ipcmsg_keys)
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# NOTE: don't show fields that either don't provide
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# XXX NOTE: DON'T-SHOW-FIELDS
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# any extra useful info or that are already shown
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# - don't provide any extra useful info or,
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# as part of `.__repr__()` output.
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# - are already shown as part of `.__repr__()` or,
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# - are sub-type specific.
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- {
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- {
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'src_type_str',
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'src_type_str',
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'boxed_type_str',
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'boxed_type_str',
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'tb_str',
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'tb_str',
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'relay_path',
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'relay_path',
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'_msg_dict',
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'cid',
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'cid',
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# since only ctxc should show it but `Error` does
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# only ctxc should show it but `Error` does
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# have it as an optional field.
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# have it as an optional field.
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'canceller',
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'canceller',
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# only for MTEs and generally only used
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# when devving/testing/debugging.
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'_msg_dict',
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'_bad_msg',
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}
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}
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)
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)
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@ -146,6 +153,7 @@ def pack_from_raise(
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|MsgTypeError
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|MsgTypeError
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),
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),
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cid: str,
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cid: str,
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hide_tb: bool = True,
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**rae_fields,
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**rae_fields,
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@ -156,7 +164,7 @@ def pack_from_raise(
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`Error`-msg using `pack_error()` to extract the tb info.
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`Error`-msg using `pack_error()` to extract the tb info.
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'''
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'''
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__tracebackhide__: bool = True
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__tracebackhide__: bool = hide_tb
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try:
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try:
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raise local_err
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raise local_err
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except type(local_err) as local_err:
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except type(local_err) as local_err:
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@ -231,7 +239,8 @@ class RemoteActorError(Exception):
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if (
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if (
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extra_msgdata
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extra_msgdata
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and ipc_msg
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and
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ipc_msg
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):
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):
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# XXX mutate the orig msg directly from
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# XXX mutate the orig msg directly from
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# manually provided input params.
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# manually provided input params.
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@ -261,17 +270,16 @@ class RemoteActorError(Exception):
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# either by customizing `ContextCancelled.__init__()` or
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# either by customizing `ContextCancelled.__init__()` or
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# through a special factor func?
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# through a special factor func?
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elif boxed_type:
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elif boxed_type:
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boxed_type_str: str = type(boxed_type).__name__
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boxed_type_str: str = boxed_type.__name__
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if (
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if (
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ipc_msg
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ipc_msg
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and not self._ipc_msg.boxed_type_str
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and
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self._ipc_msg.boxed_type_str != boxed_type_str
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):
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):
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self._ipc_msg.boxed_type_str = boxed_type_str
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self._ipc_msg.boxed_type_str = boxed_type_str
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assert self.boxed_type_str == self._ipc_msg.boxed_type_str
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assert self.boxed_type_str == self._ipc_msg.boxed_type_str
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else:
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# ensure any roundtripping evals to the input value
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self._extra_msgdata['boxed_type_str'] = boxed_type_str
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assert self.boxed_type is boxed_type
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assert self.boxed_type is boxed_type
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@property
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@property
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@ -309,7 +317,9 @@ class RemoteActorError(Exception):
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if self._ipc_msg
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if self._ipc_msg
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else {}
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else {}
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)
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)
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return self._extra_msgdata | msgdata
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return {
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k: v for k, v in self._extra_msgdata.items()
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} | msgdata
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@property
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@property
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def src_type_str(self) -> str:
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def src_type_str(self) -> str:
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@ -502,6 +512,8 @@ class RemoteActorError(Exception):
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'''
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'''
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header: str = ''
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header: str = ''
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body: str = ''
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if with_type_header:
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if with_type_header:
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header: str = f'<{type(self).__name__}(\n'
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header: str = f'<{type(self).__name__}(\n'
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@ -525,24 +537,22 @@ class RemoteActorError(Exception):
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)
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)
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if not with_type_header:
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if not with_type_header:
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body = '\n' + body
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body = '\n' + body
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else:
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first: str = ''
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message: str = self._message
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elif message := self._message:
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# split off the first line so it isn't indented
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# split off the first line so it isn't indented
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# the same like the "boxed content".
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# the same like the "boxed content".
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if not with_type_header:
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if not with_type_header:
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lines: list[str] = message.splitlines()
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lines: list[str] = message.splitlines()
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first = lines[0]
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first: str = lines[0]
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message = ''.join(lines[1:])
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message: str = message.removeprefix(first)
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else:
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first: str = ''
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body: str = (
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body: str = (
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first
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first
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+
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+
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textwrap.indent(
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message
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message,
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prefix=' ',
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)
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+
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+
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'\n'
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'\n'
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)
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)
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@ -708,52 +718,72 @@ class MsgTypeError(
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]
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]
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@property
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@property
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def msg_dict(self) -> dict[str, Any]:
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def bad_msg(self) -> PayloadMsg|None:
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'''
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'''
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If the underlying IPC `MsgType` was received from a remote
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Ref to the the original invalid IPC shuttle msg which failed
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actor but was unable to be decoded to a native
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to decode thus providing for the reason for this error.
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`Yield`|`Started`|`Return` struct, the interchange backend
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native format decoder can be used to stash a `dict`
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version for introspection by the invalidating RPC task.
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'''
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'''
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return self.msgdata.get('_msg_dict')
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if (
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(_bad_msg := self.msgdata.get('_bad_msg'))
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and
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isinstance(_bad_msg, PayloadMsg)
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):
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return _bad_msg
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@property
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elif bad_msg_dict := self.bad_msg_as_dict:
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def expected_msg(self) -> MsgType|None:
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'''
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Attempt to construct what would have been the original
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`MsgType`-with-payload subtype (i.e. an instance from the set
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of msgs in `.msg.types._payload_msgs`) which failed
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validation.
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'''
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if msg_dict := self.msg_dict.copy():
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return msgtypes.from_dict_msg(
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return msgtypes.from_dict_msg(
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dict_msg=msg_dict,
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dict_msg=bad_msg_dict.copy(),
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# use_pretty=True,
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# use_pretty=True,
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# ^-TODO-^ would luv to use this BUT then the
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# ^-TODO-^ would luv to use this BUT then the
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# `field_prefix` in `pformat_boxed_tb()` cucks it
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# `field_prefix` in `pformat_boxed_tb()` cucks it
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# all up.. XD
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# all up.. XD
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)
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)
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return None
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return None
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@property
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def bad_msg_as_dict(self) -> dict[str, Any]:
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'''
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If the underlying IPC `MsgType` was received from a remote
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actor but was unable to be decoded to a native `PayloadMsg`
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(`Yield`|`Started`|`Return`) struct, the interchange backend
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native format decoder can be used to stash a `dict` version
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for introspection by the invalidating RPC task.
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Optionally when this error is constructed from
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`.from_decode()` the caller can attempt to construct what
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would have been the original `MsgType`-with-payload subtype
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(i.e. an instance from the set of msgs in
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`.msg.types._payload_msgs`) which failed validation.
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'''
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return self.msgdata.get('_bad_msg_as_dict')
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@property
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@property
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def expected_msg_type(self) -> Type[MsgType]|None:
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def expected_msg_type(self) -> Type[MsgType]|None:
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return type(self.expected_msg)
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return type(self.bad_msg)
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@property
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@property
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def cid(self) -> str:
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def cid(self) -> str:
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# pre-packed using `.from_decode()` constructor
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# pull from required `.bad_msg` ref (or src dict)
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return self.msgdata.get('cid')
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if bad_msg := self.bad_msg:
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return bad_msg.cid
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return self.msgdata['cid']
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@classmethod
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@classmethod
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def from_decode(
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def from_decode(
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cls,
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cls,
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message: str,
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message: str,
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ipc_msg: PayloadMsg|None = None,
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bad_msg: PayloadMsg|None = None,
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msgdict: dict|None = None,
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bad_msg_as_dict: dict|None = None,
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# if provided, expand and pack all RAE compat fields into the
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# `._extra_msgdata` auxillary data `dict` internal to
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# `RemoteActorError`.
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**extra_msgdata,
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) -> MsgTypeError:
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) -> MsgTypeError:
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'''
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'''
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@ -763,25 +793,44 @@ class MsgTypeError(
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(which is normally the caller of this).
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(which is normally the caller of this).
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'''
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'''
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# if provided, expand and pack all RAE compat fields into the
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if bad_msg_as_dict:
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# `._extra_msgdata` auxillary data `dict` internal to
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# `RemoteActorError`.
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extra_msgdata: dict = {}
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if msgdict:
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extra_msgdata: dict = {
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k: v
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for k, v in msgdict.items()
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if k in _ipcmsg_keys
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}
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# NOTE: original "vanilla decode" of the msg-bytes
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# NOTE: original "vanilla decode" of the msg-bytes
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# is placed inside a value readable from
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# is placed inside a value readable from
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# `.msgdata['_msg_dict']`
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# `.msgdata['_msg_dict']`
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extra_msgdata['_msg_dict'] = msgdict
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extra_msgdata['_bad_msg_as_dict'] = bad_msg_as_dict
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# scrape out any underlying fields from the
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# msg that failed validation.
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for k, v in bad_msg_as_dict.items():
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if (
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# always skip a duplicate entry
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# if already provided as an arg
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k == '_bad_msg' and bad_msg
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or
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# skip anything not in the default msg-field set.
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k not in _ipcmsg_keys
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# k not in _body_fields
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):
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continue
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extra_msgdata[k] = v
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elif bad_msg:
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if not isinstance(bad_msg, PayloadMsg):
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raise TypeError(
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'The provided `bad_msg` is not a `PayloadMsg` type?\n\n'
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f'{bad_msg}'
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)
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extra_msgdata['_bad_msg'] = bad_msg
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extra_msgdata['cid'] = bad_msg.cid
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if 'cid' not in extra_msgdata:
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import pdbp; pdbp.set_trace()
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return cls(
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return cls(
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message=message,
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message=message,
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boxed_type=cls,
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boxed_type=cls,
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ipc_msg=ipc_msg,
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**extra_msgdata,
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**extra_msgdata,
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)
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)
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@ -836,9 +885,10 @@ class MessagingError(Exception):
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def pack_error(
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def pack_error(
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exc: BaseException|RemoteActorError,
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exc: BaseException|RemoteActorError,
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tb: str|None = None,
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cid: str|None = None,
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cid: str|None = None,
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src_uid: tuple[str, str]|None = None,
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src_uid: tuple[str, str]|None = None,
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tb: TracebackType|None = None,
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tb_str: str = '',
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) -> Error:
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) -> Error:
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'''
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'''
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@ -848,10 +898,28 @@ def pack_error(
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the receiver side using `unpack_error()` below.
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the receiver side using `unpack_error()` below.
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'''
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'''
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if tb:
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if not tb_str:
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tb_str = ''.join(traceback.format_tb(tb))
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tb_str: str = (
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''.join(traceback.format_exception(exc))
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# TODO: can we remove this is `exc` is required?
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or
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# NOTE: this is just a shorthand for the "last error" as
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# provided by `sys.exeception()`, see:
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# - https://docs.python.org/3/library/traceback.html#traceback.print_exc
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# - https://docs.python.org/3/library/traceback.html#traceback.format_exc
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traceback.format_exc()
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)
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else:
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else:
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tb_str = traceback.format_exc()
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if tb_str[-2:] != '\n':
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tb_str += '\n'
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# when caller provides a tb instance (say pulled from some other
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# src error's `.__traceback__`) we use that as the "boxed"
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# tb-string instead.
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if tb:
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# https://docs.python.org/3/library/traceback.html#traceback.format_list
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tb_str: str = ''.join(traceback.format_tb(tb)) + tb_str
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error_msg: dict[ # for IPC
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error_msg: dict[ # for IPC
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str,
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str,
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@ -1115,7 +1183,7 @@ def _mk_msg_type_err(
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src_validation_error: ValidationError|None = None,
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src_validation_error: ValidationError|None = None,
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src_type_error: TypeError|None = None,
|
src_type_error: TypeError|None = None,
|
||||||
is_invalid_payload: bool = False,
|
is_invalid_payload: bool = False,
|
||||||
src_err_msg: Error|None = None,
|
# src_err_msg: Error|None = None,
|
||||||
|
|
||||||
**mte_kwargs,
|
**mte_kwargs,
|
||||||
|
|
||||||
|
@ -1164,10 +1232,10 @@ def _mk_msg_type_err(
|
||||||
'|_ https://jcristharif.com/msgspec/extending.html#defining-a-custom-extension-messagepack-only\n'
|
'|_ https://jcristharif.com/msgspec/extending.html#defining-a-custom-extension-messagepack-only\n'
|
||||||
)
|
)
|
||||||
|
|
||||||
|
|
||||||
msgtyperr = MsgTypeError(
|
msgtyperr = MsgTypeError(
|
||||||
message=message,
|
message=message,
|
||||||
ipc_msg=msg,
|
ipc_msg=msg,
|
||||||
|
bad_msg=msg,
|
||||||
)
|
)
|
||||||
# ya, might be `None`
|
# ya, might be `None`
|
||||||
msgtyperr.__cause__ = src_type_error
|
msgtyperr.__cause__ = src_type_error
|
||||||
|
@ -1175,6 +1243,9 @@ def _mk_msg_type_err(
|
||||||
|
|
||||||
# `Channel.recv()` case
|
# `Channel.recv()` case
|
||||||
else:
|
else:
|
||||||
|
msg_dict: dict|None = None
|
||||||
|
bad_msg: PayloadMsg|None = None
|
||||||
|
|
||||||
if is_invalid_payload:
|
if is_invalid_payload:
|
||||||
msg_type: str = type(msg)
|
msg_type: str = type(msg)
|
||||||
any_pld: Any = msgpack.decode(msg.pld)
|
any_pld: Any = msgpack.decode(msg.pld)
|
||||||
|
@ -1186,19 +1257,20 @@ def _mk_msg_type_err(
|
||||||
# f' |_pld: {codec.pld_spec_str}\n'# != {any_pld!r}\n'
|
# f' |_pld: {codec.pld_spec_str}\n'# != {any_pld!r}\n'
|
||||||
# f')>\n\n'
|
# f')>\n\n'
|
||||||
)
|
)
|
||||||
|
# src_err_msg = msg
|
||||||
|
bad_msg = msg
|
||||||
# TODO: should we just decode the msg to a dict despite
|
# TODO: should we just decode the msg to a dict despite
|
||||||
# only the payload being wrong?
|
# only the payload being wrong?
|
||||||
# -[ ] maybe the better design is to break this construct
|
# -[ ] maybe the better design is to break this construct
|
||||||
# logic into a separate explicit helper raiser-func?
|
# logic into a separate explicit helper raiser-func?
|
||||||
msg_dict = None
|
|
||||||
|
|
||||||
else:
|
else:
|
||||||
msg: bytes
|
|
||||||
# decode the msg-bytes using the std msgpack
|
# decode the msg-bytes using the std msgpack
|
||||||
# interchange-prot (i.e. without any
|
# interchange-prot (i.e. without any `msgspec.Struct`
|
||||||
# `msgspec.Struct` handling) so that we can
|
# handling) so that we can determine what
|
||||||
# determine what `.msg.types.Msg` is the culprit
|
# `.msg.types.PayloadMsg` is the culprit by reporting the
|
||||||
# by reporting the received value.
|
# received value.
|
||||||
|
msg: bytes
|
||||||
msg_dict: dict = msgpack.decode(msg)
|
msg_dict: dict = msgpack.decode(msg)
|
||||||
msg_type_name: str = msg_dict['msg_type']
|
msg_type_name: str = msg_dict['msg_type']
|
||||||
msg_type = getattr(msgtypes, msg_type_name)
|
msg_type = getattr(msgtypes, msg_type_name)
|
||||||
|
@ -1235,9 +1307,13 @@ def _mk_msg_type_err(
|
||||||
if verb_header:
|
if verb_header:
|
||||||
message = f'{verb_header} ' + message
|
message = f'{verb_header} ' + message
|
||||||
|
|
||||||
|
# if not isinstance(bad_msg, PayloadMsg):
|
||||||
|
# import pdbp; pdbp.set_trace()
|
||||||
|
|
||||||
msgtyperr = MsgTypeError.from_decode(
|
msgtyperr = MsgTypeError.from_decode(
|
||||||
message=message,
|
message=message,
|
||||||
msgdict=msg_dict,
|
bad_msg=bad_msg,
|
||||||
|
bad_msg_as_dict=msg_dict,
|
||||||
|
|
||||||
# NOTE: for the send-side `.started()` pld-validate
|
# NOTE: for the send-side `.started()` pld-validate
|
||||||
# case we actually set the `._ipc_msg` AFTER we return
|
# case we actually set the `._ipc_msg` AFTER we return
|
||||||
|
@ -1245,7 +1321,7 @@ def _mk_msg_type_err(
|
||||||
# want to emulate the `Error` from the mte we build here
|
# want to emulate the `Error` from the mte we build here
|
||||||
# Bo
|
# Bo
|
||||||
# so by default in that case this is set to `None`
|
# so by default in that case this is set to `None`
|
||||||
ipc_msg=src_err_msg,
|
# ipc_msg=src_err_msg,
|
||||||
)
|
)
|
||||||
msgtyperr.__cause__ = src_validation_error
|
msgtyperr.__cause__ = src_validation_error
|
||||||
return msgtyperr
|
return msgtyperr
|
||||||
|
|
Loading…
Reference in New Issue