| /* |
| * Copyright 2015-present Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.incubator.net.impl; |
| |
| import com.google.common.collect.Maps; |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.onosproject.incubator.net.PortStatisticsService; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.device.DeviceEvent; |
| import org.onosproject.net.device.DeviceListener; |
| import org.onosproject.net.device.DeviceService; |
| import org.onosproject.net.device.PortStatistics; |
| import org.onosproject.net.statistic.DefaultLoad; |
| import org.onosproject.net.statistic.Load; |
| import org.slf4j.Logger; |
| |
| import java.util.Map; |
| import java.util.stream.Collectors; |
| |
| import static org.onosproject.net.PortNumber.portNumber; |
| import static org.onosproject.net.device.DeviceEvent.Type.*; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Implementation of the port statistics service. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class PortStatisticsManager implements PortStatisticsService { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private static final long POLL_FREQUENCY = 10_000; // milliseconds |
| private static final long STALE_LIMIT = (long) (1.5 * POLL_FREQUENCY); |
| private static final int SECOND = 1_000; // milliseconds |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| |
| private final DeviceListener deviceListener = new InternalDeviceListener(); |
| |
| private Map<ConnectPoint, DataPoint> current = Maps.newConcurrentMap(); |
| private Map<ConnectPoint, DataPoint> previous = Maps.newConcurrentMap(); |
| |
| @Activate |
| public void activate() { |
| deviceService.addListener(deviceListener); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| deviceService.removeListener(deviceListener); |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public Load load(ConnectPoint connectPoint) { |
| DataPoint c = current.get(connectPoint); |
| DataPoint p = previous.get(connectPoint); |
| long now = System.currentTimeMillis(); |
| |
| if (c != null && p != null && (now - c.time < STALE_LIMIT)) { |
| if (c.time > p.time + SECOND) { |
| //Use max of either Tx or Rx load as the total load of a port |
| Load load = null; |
| if (c.stats.bytesSent() >= p.stats.bytesSent()) { |
| load = new DefaultLoad(c.stats.bytesSent(), p.stats.bytesSent(), |
| (int) (c.time - p.time) / SECOND); |
| } |
| if (c.stats.bytesReceived() >= p.stats.bytesReceived()) { |
| Load rcvLoad = new DefaultLoad(c.stats.bytesReceived(), p.stats.bytesReceived(), |
| (int) (c.time - p.time) / SECOND); |
| load = ((load == null) || (rcvLoad.rate() > load.rate())) ? rcvLoad : load; |
| } |
| return load; |
| } |
| } |
| return null; |
| } |
| |
| // Monitors port stats update messages. |
| private class InternalDeviceListener implements DeviceListener { |
| @Override |
| public void event(DeviceEvent event) { |
| DeviceEvent.Type type = event.type(); |
| DeviceId deviceId = event.subject().id(); |
| if (type == PORT_STATS_UPDATED) { |
| // Update port load |
| updateDeviceData(deviceId); |
| |
| } else if (type == DEVICE_REMOVED || |
| (type == DEVICE_AVAILABILITY_CHANGED && |
| !deviceService.isAvailable(deviceId))) { |
| // Clean-up all port loads |
| pruneDeviceData(deviceId); |
| } |
| } |
| } |
| |
| // Updates the port stats for the specified device |
| private void updateDeviceData(DeviceId deviceId) { |
| deviceService.getPortStatistics(deviceId) |
| .forEach(stats -> updatePortData(deviceId, stats)); |
| } |
| |
| // Updates the port stats for the specified port |
| private void updatePortData(DeviceId deviceId, PortStatistics stats) { |
| ConnectPoint cp = new ConnectPoint(deviceId, portNumber(stats.port())); |
| DataPoint c = current.get(cp); |
| |
| // Create a new data point and make it the current one |
| current.put(cp, new DataPoint(stats)); |
| |
| // If we have a current data point, demote it to previous |
| if (c != null) { |
| previous.put(cp, c); |
| } |
| } |
| |
| // Cleans all port loads for the specified device |
| private void pruneDeviceData(DeviceId deviceId) { |
| pruneMap(current, deviceId); |
| pruneMap(previous, deviceId); |
| } |
| |
| private void pruneMap(Map<ConnectPoint, DataPoint> map, DeviceId deviceId) { |
| map.keySet().stream().filter(cp -> deviceId.equals(cp.deviceId())) |
| .collect(Collectors.toSet()).forEach(map::remove); |
| } |
| |
| // Auxiliary data point to track when we receive different samples. |
| private class DataPoint { |
| long time; |
| PortStatistics stats; |
| |
| DataPoint(PortStatistics stats) { |
| time = System.currentTimeMillis(); |
| this.stats = stats; |
| } |
| } |
| |
| } |