mirror of https://github.com/nocturn9x/giambio.git
104 lines
2.5 KiB
Python
104 lines
2.5 KiB
Python
"""
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Exceptions for giambio
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Copyright (C) 2020 nocturn9x
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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import traceback
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from typing import List
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class GiambioError(Exception):
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"""
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Base class for giambio exceptions
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"""
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...
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class InternalError(GiambioError):
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"""
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Internal exception
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"""
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...
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class CancelledError(GiambioError):
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"""
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Exception raised by the giambio.objects.Task.cancel() method
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to terminate a child task. This should NOT be caught, or
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at least it should be re-raised and never ignored
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"""
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...
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class ResourceBusy(GiambioError):
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"""
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Exception that is raised when a resource is accessed by more than
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one task at a time
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"""
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...
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class ResourceClosed(GiambioError):
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"""
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Raised when I/O is attempted on a closed resource
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"""
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...
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class TooSlowError(GiambioError):
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"""
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This is raised if the timeout of a pool created using
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giambio.with_timeout expires
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"""
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class ErrorStack(GiambioError):
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"""
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This exception wraps multiple exceptions
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and shows each individual traceback of them when
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printed. This is to ensure that no exception is
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lost even if 2 or more tasks raise at the
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same time.
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"""
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def __init__(self, errors: List[BaseException]):
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"""
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Object constructor
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"""
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super().__init__()
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self.errors = errors
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def __str__(self):
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"""
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Returns str(self)
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"""
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tracebacks = ""
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for i, err in enumerate(self.errors):
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if i not in (1, len(self.errors)):
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tracebacks += (
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f"\n{''.join(traceback.format_exception(type(err), err, err.__traceback__))}\n{'-' * 32}\n"
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)
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else:
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tracebacks += f"\n{''.join(traceback.format_exception(type(err), err, err.__traceback__))}"
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return f"Multiple errors occurred:\n{tracebacks}"
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