def processing(self, req):
response = OODict()
response._id = req._id
try:
result = self.handle_req(req) # Must set req._status
if result is None:
return None # Request not done, need to queue back
# For complicated calls, read for example, should return a tuple: value, payload
if isinstance(result, tuple):
response.value, response.payload = result
else:
response.value = result
except RequestHandleError, err:
response.error = str(err)
def call(self, dest, method, **args):
# How to detect socket errors? how to resend message and reconnect
# socket?
# Connect socket
if dest not in self._locks:
self._locks[dest] = thread.allocate_lock()
self._locks[dest].acquire()
if dest not in self._sockets:
self._connect(dest)
# Pack message
req = OODict()
req.method = method
for k, v in args.items():
req[k] = v
# Lock id here
self._id_lock.acquire()
req._id = self._id
self._id += 1
self._id_lock.release()
retry = 0
while True:
try:
protocol.send_message(self._sockets[dest], req)
break
except socket.error, err:
# There must be something wrong with this socket
# Create a new one
self._connect(dest)
# Only retry when connected,
if retry >= self._send_error_retry:
self._locks[dest].release()
raise exception.NoMoreRetryError('socket send error')
# Do not need sleep here
retry += 1
