67 lines
1.6 KiB
Python
67 lines
1.6 KiB
Python
"""
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Our classy exception set.
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"""
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import importlib
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import builtins
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import traceback
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_this_mod = importlib.import_module(__name__)
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class RemoteActorError(Exception):
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# TODO: local recontruction of remote exception deats
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"Remote actor exception bundled locally"
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def __init__(self, message, type_str, **msgdata):
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super().__init__(message)
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for ns in [builtins, _this_mod]:
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try:
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self.type = getattr(ns, type_str)
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break
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except AttributeError:
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continue
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else:
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self.type = Exception
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self.msgdata = msgdata
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# TODO: a trio.MultiError.catch like context manager
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# for catching underlying remote errors of a particular type
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class InternalActorError(RemoteActorError):
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"""Remote internal ``tractor`` error indicating
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failure of some primitive or machinery.
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"""
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class NoResult(RuntimeError):
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"No final result is expected for this actor"
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class ModuleNotExposed(ModuleNotFoundError):
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"The requested module is not exposed for RPC"
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def pack_error(exc):
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"""Create an "error message" for tranmission over
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a channel (aka the wire).
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"""
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return {
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'error': {
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'tb_str': traceback.format_exc(),
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'type_str': type(exc).__name__,
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}
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}
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def unpack_error(msg, chan=None, err_type=RemoteActorError):
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"""Unpack an 'error' message from the wire
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into a local ``RemoteActorError``.
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"""
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tb_str = msg['error'].get('tb_str', '')
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return err_type(
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f"{chan.uid}\n" + tb_str,
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**msg['error'],
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)
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