GUI -- Added port-statistics traffic visualization to the topo view.
Change-Id: I52b3c1739cc50a026c0796819d61ec1898937ced
diff --git a/incubator/net/src/main/java/org/onosproject/incubator/net/impl/PortStatisticsManager.java b/incubator/net/src/main/java/org/onosproject/incubator/net/impl/PortStatisticsManager.java
new file mode 100644
index 0000000..9d6e1cb
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+++ b/incubator/net/src/main/java/org/onosproject/incubator/net/impl/PortStatisticsManager.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2015 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());
+
+ @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);
+ if (c != null && p != null) {
+ return new DefaultLoad(c.stats.bytesSent(), p.stats.bytesSent(),
+ (int) (c.time - p.time) / 1000);
+ }
+ 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()));
+
+ // If we have a current data point, demote it to previous
+ DataPoint c = current.get(cp);
+ if (c != null) {
+ previous.put(cp, c);
+ }
+
+ // Create a new data point and make it the current one
+ current.put(cp, new DataPoint(stats));
+ }
+
+ // 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;
+ }
+ }
+
+}