def call_exception_handler(self, context):
if self._exception_handler is None:
try:
self.default_exception_handler(context)
except Exception:
# Second protection layer for unexpected errors
# in the default implementation, as well as for subclassed
# event loops with overloaded "default_exception_handler".
logger.error('Exception in default exception handler',
exc_info=True)
else:
try:
self._exception_handler(self, context)
except Exception as exc:
# Exception in the user set custom exception handler.
try:
# Let's try default handler.
self.default_exception_handler({
'message': 'Unhandled error in exception handler',
'exception': exc,
'context': context,
})
except Exception:
# Guard 'default_exception_handler' in case it's
# overloaded.
logger.error(
'Exception in default exception handler '
'while handling an unexpected error '
'in custom exception handler',
exc_info=True)
def call_exception_handler(self, context):
if self._exception_handler is None:
try:
self.default_exception_handler(context)
except Exception:
# Second protection layer for unexpected errors
# in the default implementation, as well as for subclassed
# event loops with overloaded "default_exception_handler".
logger.error('Exception in default exception handler',
exc_info=True)
else:
try:
self._exception_handler(self, context)
except Exception as exc:
# Exception in the user set custom exception handler.
try:
# Let's try default handler.
self.default_exception_handler({
'message': 'Unhandled error in exception handler',
'exception': exc,
'context': context,
})
except Exception:
# Guard 'default_exception_handler' in case it's
# overloaded.
logger.error('Exception in default exception handler '
'while handling an unexpected error '
'in custom exception handler',
exc_info=True)
def default_exception_handler(self, context):
message = context.get('message')
if not message:
message = 'Unhandled exception in event loop'
exception = context.get('exception')
if exception is not None:
if hasattr(exception, '__traceback__'):
# Python 3
tb = exception.__traceback__
else:
# call_exception_handler() is usually called indirectly
# from an except block. If it's not the case, the traceback
# is undefined...
tb = sys.exc_info()[2]
exc_info = (type(exception), exception, tb)
else:
exc_info = False
log_lines = [message]
for key in sorted(context):
if key in ('message', 'exception'):
continue
log_lines.append('{0}: {1!r}'.format(key, context[key]))
logger.error('\n'.join(log_lines), exc_info=exc_info)
def default_exception_handler(self, context):
message = context.get('message')
if not message:
message = 'Unhandled exception in event loop'
exception = context.get('exception')
if exception is not None:
if hasattr(exception, '__traceback__'):
# Python 3
tb = exception.__traceback__
else:
# call_exception_handler() is usually called indirectly
# from an except block. If it's not the case, the traceback
# is undefined...
tb = sys.exc_info()[2]
exc_info = (type(exception), exception, tb)
else:
exc_info = False
log_lines = [message]
for key in sorted(context):
if key in ('message', 'exception'):
continue
log_lines.append('{0}: {1!r}'.format(key, context[key]))
logger.error('\n'.join(log_lines), exc_info=exc_info)
