Source code for bokeh.protocol.messages.error

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# Copyright (c) 2012 - 2022, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------

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# Boilerplate
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from __future__ import annotations

import logging # isort:skip
log = logging.getLogger(__name__)

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# Imports
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# Standard library imports
import sys
from traceback import format_exception
from typing import Any

# External imports
from typing_extensions import TypedDict

# Bokeh imports
from ...core.types import ID
from ..message import Message

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# Globals and constants
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__all__ = (
    'error',
)

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# General API
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# Dev API
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class Error(TypedDict):
    text: str
    traceback: str | None

class error(Message[Error]):
    ''' Define the ``ERROR`` message for reporting error conditions back to a
    Bokeh server.

    The ``content`` fragment of for this message is has the form:

    .. code-block:: python

        {
            'text'      : <error message text>

            # this is optional
            'traceback' : <traceback text>
        }

    '''

    msgtype = 'ERROR'

    def __repr__(self) -> str:
        msg = super().__repr__()
        msg += " --- "
        msg += self.content['text']
        if self.content["traceback"] is not None:
            msg += "\n" + self.content['traceback']
        return msg

    @classmethod
    def create(cls, request_id: ID, text: str, **metadata: Any) -> error:
        ''' Create an ``ERROR`` message

        Args:
            request_id (str) :
                The message ID for the message the precipitated the error.

            text (str) :
                The text of any error message or traceback, etc.

        Any additional keyword arguments will be put into the message
        ``metadata`` fragment as-is.

        '''
        header = cls.create_header(request_id=request_id)
        ex_type, ex, tb = sys.exc_info()
        traceback = "".join(format_exception(ex_type, ex, tb)) if ex_type else None
        content = Error(text=text, traceback=traceback)
        return cls(header, metadata, content)

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# Private API
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# Code
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