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asyncio: New error handling API. Issue #20681.

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This commit is contained in:
Yury Selivanov 2014-02-18 18:02:19 -05:00
parent 065efc3072
commit ff827f08ac
15 changed files with 491 additions and 99 deletions
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35
Lib/asyncio/selector_events.py
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@ -112,7 +112,11 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
# Some platforms (e.g. Linux keep reporting the FD as
# ready, so we remove the read handler temporarily.
# We'll try again in a while.
logger.exception('Accept out of system resource (%s)', exc)
self.call_exception_handler({
'message': 'socket.accept() out of system resource',
'exception': exc,
'socket': sock,
})
self.remove_reader(sock.fileno())
self.call_later(constants.ACCEPT_RETRY_DELAY,
self._start_serving,
@ -132,7 +136,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
def add_reader(self, fd, callback, *args):
"""Add a reader callback."""
handle = events.Handle(callback, args)
handle = events.Handle(callback, args, self)
try:
key = self._selector.get_key(fd)
except KeyError:
@ -167,7 +171,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
def add_writer(self, fd, callback, *args):
"""Add a writer callback.."""
handle = events.Handle(callback, args)
handle = events.Handle(callback, args, self)
try:
key = self._selector.get_key(fd)
except KeyError:
@ -364,8 +368,13 @@ class _FlowControlMixin(transports.Transport):
self._protocol_paused = True
try:
self._protocol.pause_writing()
except Exception:
logger.exception('pause_writing() failed')
except Exception as exc:
self._loop.call_exception_handler({
'message': 'protocol.pause_writing() failed',
'exception': exc,
'transport': self,
'protocol': self._protocol,
})
def _maybe_resume_protocol(self):
if (self._protocol_paused and
@ -373,8 +382,13 @@ class _FlowControlMixin(transports.Transport):
self._protocol_paused = False
try:
self._protocol.resume_writing()
except Exception:
logger.exception('resume_writing() failed')
except Exception as exc:
self._loop.call_exception_handler({
'message': 'protocol.resume_writing() failed',
'exception': exc,
'transport': self,
'protocol': self._protocol,
})
def set_write_buffer_limits(self, high=None, low=None):
if high is None:
@ -435,7 +449,12 @@ class _SelectorTransport(_FlowControlMixin, transports.Transport):
def _fatal_error(self, exc):
# Should be called from exception handler only.
if not isinstance(exc, (BrokenPipeError, ConnectionResetError)):
logger.exception('Fatal error for %s', self)
self._loop.call_exception_handler({
'message': 'Fatal transport error',
'exception': exc,
'transport': self,
'protocol': self._protocol,
})
self._force_close(exc)
def _force_close(self, exc):