Python MovingAverage.add_sample方法代码示例

# 需要导入模块: from pymongo.read_preferences import MovingAverage [as 别名]
# 或者: from pymongo.read_preferences.MovingAverage import add_sample [as 别名]
    def run_scenario(self):
        moving_average = MovingAverage()

        if scenario_def['avg_rtt_ms'] != "NULL":
            moving_average.add_sample(scenario_def['avg_rtt_ms'])

        if scenario_def['new_rtt_ms'] != "NULL":
            moving_average.add_sample(scenario_def['new_rtt_ms'])

        self.assertAlmostEqual(moving_average.get(),
                               scenario_def['new_avg_rtt'])

# 需要导入模块: from pymongo.read_preferences import MovingAverage [as 别名]
# 或者: from pymongo.read_preferences.MovingAverage import add_sample [as 别名]
 def test_moving_average(self):
     avg = MovingAverage()
     self.assertIsNone(avg.get())
     avg.add_sample(10)
     self.assertAlmostEqual(10, avg.get())
     avg.add_sample(20)
     self.assertAlmostEqual(12, avg.get())
     avg.add_sample(30)
     self.assertAlmostEqual(15.6, avg.get())

# 需要导入模块: from pymongo.read_preferences import MovingAverage [as 别名]
# 或者: from pymongo.read_preferences.MovingAverage import add_sample [as 别名]

#.........这里部分代码省略.........
        
        # Avoid cycles. When self or topology is freed, stop executor soon.
        self_ref = weakref.ref(self, executor.close)
        self._topology = weakref.proxy(topology, executor.close)

    def open(self):
        """Start monitoring, or restart after a fork.

        Multiple calls have no effect.
        """
        self._executor.open()

    def close(self):
        """Close and stop monitoring.

        open() restarts the monitor after closing.
        """
        self._executor.close()

        # Increment the pool_id and maybe close the socket. If the executor
        # thread has the socket checked out, it will be closed when checked in.
        self._pool.reset()

    def join(self, timeout=None):
        self._executor.join(timeout)

    def request_check(self):
        """If the monitor is sleeping, wake and check the server soon."""
        self._executor.wake()

    def _run(self):
        try:
            self._server_description = self._check_with_retry()
            self._topology.on_change(self._server_description)
        except ReferenceError:
            # Topology was garbage-collected.
            self.close()

    def _check_with_retry(self):
        """Call ismaster once or twice. Reset server's pool on error.

        Returns a ServerDescription.
        """
        # According to the spec, if an ismaster call fails we reset the
        # server's pool. If a server was once connected, change its type
        # to Unknown only after retrying once.
        address = self._server_description.address
        retry = self._server_description.server_type != SERVER_TYPE.Unknown

        try:
            return self._check_once()
        except ReferenceError:
            raise
        except Exception as error:
            self._topology.reset_pool(address)
            default = ServerDescription(address, error=error)
            if not retry:
                self._avg_round_trip_time.reset()
                # Server type defaults to Unknown.
                return default

            # Try a second and final time. If it fails return original error.
            try:
                return self._check_once()
            except ReferenceError:
                raise
            except Exception:
                self._avg_round_trip_time.reset()
                return default

    def _check_once(self):
        """A single attempt to call ismaster.

        Returns a ServerDescription, or raises an exception.
        """
        with self._pool.get_socket({}) as sock_info:
            response, round_trip_time = self._check_with_socket(sock_info)
            self._avg_round_trip_time.add_sample(round_trip_time)
            sd = ServerDescription(
                address=self._server_description.address,
                ismaster=response,
                round_trip_time=self._avg_round_trip_time.get())

            return sd

    def _check_with_socket(self, sock_info):
        """Return (IsMaster, round_trip_time).

        Can raise ConnectionFailure or OperationFailure.
        """
        start = _time()
        request_id, msg, max_doc_size = message.query(
            0, 'admin.$cmd', 0, -1, {'ismaster': 1},
            None, DEFAULT_CODEC_OPTIONS)

        # TODO: use sock_info.command()
        sock_info.send_message(msg, max_doc_size)
        raw_response = sock_info.receive_message(1, request_id)
        result = helpers._unpack_response(raw_response)
        return IsMaster(result['data'][0]), _time() - start

# 需要导入模块: from pymongo.read_preferences import MovingAverage [as 别名]
# 或者: from pymongo.read_preferences.MovingAverage import add_sample [as 别名]

#.........这里部分代码省略.........

    def _run(self):
        try:
            self._server_description = self._check_with_retry()
            self._topology.on_change(self._server_description)
        except ReferenceError:
            # Topology was garbage-collected.
            self.close()

    def _check_with_retry(self):
        """Call ismaster once or twice. Reset server's pool on error.

        Returns a ServerDescription.
        """
        # According to the spec, if an ismaster call fails we reset the
        # server's pool. If a server was once connected, change its type
        # to Unknown only after retrying once.
        address = self._server_description.address
        retry = True
        metadata = None
        if self._server_description.server_type == SERVER_TYPE.Unknown:
            retry = False
            metadata = self._pool.opts.metadata

        start = _time()
        try:
            # If the server type is unknown, send metadata with first check.
            return self._check_once(metadata=metadata)
        except ReferenceError:
            raise
        except Exception as error:
            error_time = _time() - start
            if self._publish:
                self._listeners.publish_server_heartbeat_failed(
                    address, error_time, error)
            self._topology.reset_pool(address)
            default = ServerDescription(address, error=error)
            if not retry:
                self._avg_round_trip_time.reset()
                # Server type defaults to Unknown.
                return default

            # Try a second and final time. If it fails return original error.
            # Always send metadata: this is a new connection.
            start = _time()
            try:
                return self._check_once(metadata=self._pool.opts.metadata)
            except ReferenceError:
                raise
            except Exception as error:
                error_time = _time() - start
                if self._publish:
                    self._listeners.publish_server_heartbeat_failed(
                        address, error_time, error)
                self._avg_round_trip_time.reset()
                return default

    def _check_once(self, metadata=None):
        """A single attempt to call ismaster.

        Returns a ServerDescription, or raises an exception.
        """
        address = self._server_description.address
        if self._publish:
            self._listeners.publish_server_heartbeat_started(address)
        with self._pool.get_socket({}) as sock_info:
            response, round_trip_time = self._check_with_socket(
                sock_info, metadata=metadata)
            self._avg_round_trip_time.add_sample(round_trip_time)
            sd = ServerDescription(
                address=address,
                ismaster=response,
                round_trip_time=self._avg_round_trip_time.get())
            if self._publish:
                self._listeners.publish_server_heartbeat_succeeded(
                    address, round_trip_time, response)

            return sd

    def _check_with_socket(self, sock_info, metadata=None):
        """Return (IsMaster, round_trip_time).

        Can raise ConnectionFailure or OperationFailure.
        """
        cmd = SON([('ismaster', 1)])
        if metadata is not None:
            cmd['client'] = metadata
        if self._server_description.max_wire_version >= 6:
            cluster_time = self._topology.max_cluster_time()
            if cluster_time is not None:
                cmd['$clusterTime'] = cluster_time
        start = _time()
        request_id, msg, max_doc_size = message.query(
            0, 'admin.$cmd', 0, -1, cmd,
            None, DEFAULT_CODEC_OPTIONS)

        # TODO: use sock_info.command()
        sock_info.send_message(msg, max_doc_size)
        reply = sock_info.receive_message(request_id)
        return IsMaster(reply.command_response()), _time() - start