def _close_callback(self):
"""Callback called when redis closed the connection.
The callback queue is emptied and we call each callback found
with None or with an exception object to wake up blocked client.
"""
while True:
try:
callback = self.__callback_queue.popleft()
callback(ConnectionError("closed connection"))
except IndexError:
break
if self.subscribed:
# pubsub clients
self._reply_list.append(ConnectionError("closed connection"))
self._condition.notify_all()
def call(self, *args, **kwargs):
"""Calls a redis command and returns a Future of the reply.
Args:
*args: full redis command as variable length argument list or
a Pipeline object (as a single argument).
**kwargs: internal private options (do not use).
Returns:
a Future with the decoded redis reply as result (when available) or
a ConnectionError object in case of connection error.
Raises:
ClientError: your Pipeline object is empty.
Examples:
>>> @tornado.gen.coroutine
def foobar():
client = Client()
result = yield client.call("HSET", "key", "field", "val")
"""
if not self.is_connected():
if self.autoconnect:
# We use this method only when we are not contected
# to void performance penaly due to gen.coroutine decorator
return self._call_with_autoconnect(*args, **kwargs)
else:
error = ConnectionError("you are not connected and "
"autoconnect=False")
return tornado.gen.maybe_future(error)
return self._call(*args, **kwargs)
def _close_callback(self):
"""Callback called when redis closed the connection.
The callback queue is emptied and we call each callback found
with None or with an exception object to wake up blocked client.
"""
while True:
try:
callback = self.__callback_queue.popleft()
callback(ConnectionError("closed connection"))
except IndexError:
break
def async_call(self, *args, **kwargs):
"""Calls a redis command, waits for the reply and call a callback.
Following options are available (not part of the redis command itself):
- callback
Function called (with the result as argument) when the result
is available. If not set, the reply is silently discarded. In
case of errors, the callback is called with a
TornadisException object as argument.
Args:
*args: full redis command as variable length argument list or
a Pipeline object (as a single argument).
**kwargs: options as keyword parameters.
Examples:
>>> def cb(result):
pass
>>> client.async_call("HSET", "key", "field", "val", callback=cb)
"""
def after_autoconnect_callback(future):
if self.is_connected():
self._call(*args, **kwargs)
else:
# FIXME
pass
if 'callback' not in kwargs:
kwargs['callback'] = discard_reply_cb
if not self.is_connected():
if self.autoconnect:
connect_future = self.connect()
cb = after_autoconnect_callback
self.__connection._ioloop.add_future(connect_future, cb)
else:
error = ConnectionError("you are not connected and "
"autoconnect=False")
kwargs['callback'](error)
else:
self._call(*args, **kwargs)
def _call_with_autoconnect(self, *args, **kwargs):
yield self.connect()
if not self.is_connected():
raise tornado.gen.Return(ConnectionError("impossible to connect"))
res = yield self._call(*args, **kwargs)
raise tornado.gen.Return(res)