def _reply_handler(self):
'''Reply-handling coroutine. Must not throw exceptions.'''
while True:
try:
buf = yield gen.Task(self._read, RPCHeader.ENCODED_LENGTH)
hdr = RPCHeader.decode(buf)
# Always read the body, regardless of encoding errors, to
# keep the stream in sync
data = yield gen.Task(self._read, hdr.datalen)
except ConnectionFailure:
# Error out pending callbacks
callbacks = self._pending.values()
self._pending.clear()
for callback in callbacks:
callback(None, '')
return
if hdr.status == RPC_PENDING:
_log.warning('RPC client received request message')
self._send_message(hdr.sequence, RPCEncodingError.code,
hdr.cmd)
continue
try:
callback = self._pending.pop(hdr.sequence)
except KeyError:
_log.warning('Received reply with no registered callback')
# Drop on the floor
continue
try:
callback(hdr.status, data)
except Exception:
# Don't crash the coroutine if the callback fails
_log.exception('Reply callback raised exception')
def _reply_handler(self):
'''Reply-handling coroutine. Must not throw exceptions.'''
while True:
try:
buf = yield gen.Task(self._read, RPCHeader.ENCODED_LENGTH)
hdr = RPCHeader.decode(buf)
# Always read the body, regardless of encoding errors, to
# keep the stream in sync
data = yield gen.Task(self._read, hdr.datalen)
except ConnectionFailure:
# Error out pending callbacks
callbacks = self._pending.values()
self._pending.clear()
for callback in callbacks:
callback(None, '')
return
if hdr.status == RPC_PENDING:
_log.warning('RPC client received request message')
self._send_message(hdr.sequence, RPCEncodingError.code,
hdr.cmd)
continue
try:
callback = self._pending.pop(hdr.sequence)
except KeyError:
_log.warning('Received reply with no registered callback')
# Drop on the floor
continue
try:
callback(hdr.status, data)
except Exception:
# Don't crash the coroutine if the callback fails
_log.exception('Reply callback raised exception')
def _get_reply(self):
buf = self._read_bytes(self._sock, RPCHeader.ENCODED_LENGTH)
hdr = RPCHeader.decode(buf)
# Always read the body, regardless of encoding errors, to
# keep the stream in sync
data = self._read_bytes(self._sock, hdr.datalen)
if hdr.status == RPC_PENDING:
_log.warning('RPC client received request message')
self._send_message(hdr.sequence, RPCEncodingError.code, hdr.cmd)
return hdr.status, data
def _get_reply(self):
buf = self._read_bytes(self._sock, RPCHeader.ENCODED_LENGTH)
hdr = RPCHeader.decode(buf)
# Always read the body, regardless of encoding errors, to
# keep the stream in sync
data = self._read_bytes(self._sock, hdr.datalen)
if hdr.status == RPC_PENDING:
_log.warning('RPC client received request message')
self._send_message(hdr.sequence, RPCEncodingError.code,
hdr.cmd)
return hdr.status, data
def _send_message(self, sequence, status, cmd, body=''):
hdr = RPCHeader(sequence, status, cmd, len(body))
self._write(hdr.encode() + body)
def _send_message(self, sequence, status, cmd, body=''):
hdr = RPCHeader(sequence, status, cmd, len(body))
self._sock.sendall(hdr.encode() + body)