def process(self, event):
type_id = event.type_id()
if type_id == LinkEventType.HANDSHAKE_REQ:
response = None
try:
response = self.buffer_transform.handshake(event.data)
except Exception as ex:
Trace.error("{} error handshaking {}", self.link.name, ex)
self.session.send(HandshakeResp().setattrs(_transform=False,
data=response))
elif type_id == LinkEventType.HANDSHAKE_RESP:
result = False
try:
result = self.buffer_transform.fini_handshake(event.data)
except Exception as ex:
Trace.error("{} error finishing handshake {}", self.link.name,
ex)
if result:
self.rx_transform_ready = True
self.session.send(HandshakeAck().setattrs(_transform=False,
result=result))
elif type_id == LinkEventType.HANDSHAKE_ACK:
result = event.result
if result:
self.tx_transform_ready = True
self.session.link.on_connect(result, self.session)
else:
return False
return True
def _on_connect(self, result, context):
super(TcpClient, self)._on_connect(result, context)
if result:
peername = context.transport.get_extra_info('peername')
Trace.info("connected to {}:{}", peername[0], peername[1])
else:
Trace.error("error connecting to {}:{}", self.remote_host,
self.remote_port)
def handle_error(self):
err = self.dispatcher.socket.getsockopt(socket.SOL_SOCKET,
socket.SO_ERROR)
if self.connecting:
Trace.error("connect error {}", errno.errorcode[err])
self.connecting = False
return
Trace.error("error {}", errno.errorcode[err])
def _on_connect(self, result, context):
super(TcpClient, self)._on_connect(result, context)
if result:
peername = context.socket.getpeername()
Trace.info("connected to {}:{}", peername[0], peername[1])
context.peername = peername
else:
Trace.error("error connecting to {}:{}", self.remote_host,
self.remote_port)
def on_receive(self, data):
if self.has_heartbeat_strategy:
self.heartbeat_strategy.on_receive()
self.rx_buffer += data
deserializer = Deserializer()
while True:
deserializer.buffer = self.rx_buffer
deserializer.pos = 0
num_bytes, length, transformed = self.parse_header(deserializer)
if num_bytes == 0:
return
if len(self.rx_buffer) < (length + num_bytes):
return
buffer = self.rx_buffer[num_bytes:num_bytes + length]
self.rx_buffer = self.rx_buffer[num_bytes + length:]
if self.has_channel_strategy and transformed:
try:
buffer = self.channel_strategy.after_receive(buffer)
except Exception as ex:
Trace.error("{} inverse transform error {}",
self.link.name, ex)
continue
deserializer.buffer = buffer
deserializer.pos = 0
type_id = deserializer.read_int32(None)
event = self.link.create_event(type_id)
if event is None:
Trace.Error("unknown event type id {}", type_id)
continue
event.deserialize(deserializer)
Trace.debug("{} received {}", self.link.name, event)
processed = False
if self.has_channel_strategy:
processed = self.channel_strategy.process(event)
elif not processed and self.has_heartbeat_strategy:
processed = self.heartbeat_strategy.process(event)
elif not processed:
processed = self._process(event)
if not processed:
event._handle = self.handle
Hub.post(event)
def on_timeout(self, e):
Flow.unbind_with(self.handler_token)
Flow.unbind_with(self.timeout_token)
wait_handle = self.handler_token[0]._wait_handle
if wait_handle:
WaitHandlePool.release(wait_handle)
Trace.error("WaitForEvent timeout for {}".format(
self.handler_token[0]))
self.coroutine.result = None
self.coroutine.next()
def dispatch(self, event):
event_proxy = Flow.thread_local.event_proxy
handler_chain = Flow.thread_local.handler_chain
if len(handler_chain) != 0:
del handler_chain[:]
self.binding.build_handler_chain(event, event_proxy, handler_chain)
for handler in handler_chain:
try:
handler(event)
except Exception as ex:
Trace.error("flow: dispatch {}".format(ex))
traceback.print_exc(file=sys.stderr)
del handler_chain[:]
