Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 1 | package org.onlab.onos.metrics.topology; |
| 2 | |
| 3 | import static org.slf4j.LoggerFactory.getLogger; |
| 4 | |
| 5 | import java.util.LinkedList; |
| 6 | import java.util.List; |
| 7 | |
| 8 | import com.codahale.metrics.Gauge; |
| 9 | import com.codahale.metrics.Meter; |
| 10 | import com.google.common.collect.ImmutableList; |
| 11 | import org.apache.felix.scr.annotations.Activate; |
| 12 | import org.apache.felix.scr.annotations.Component; |
| 13 | import org.apache.felix.scr.annotations.Deactivate; |
| 14 | import org.apache.felix.scr.annotations.Reference; |
| 15 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 16 | import org.apache.felix.scr.annotations.Service; |
| 17 | import org.onlab.metrics.MetricsComponent; |
| 18 | import org.onlab.metrics.MetricsFeature; |
| 19 | import org.onlab.metrics.MetricsService; |
| 20 | import org.onlab.onos.event.Event; |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 21 | import org.onlab.onos.net.device.DeviceEvent; |
| 22 | import org.onlab.onos.net.device.DeviceListener; |
| 23 | import org.onlab.onos.net.device.DeviceService; |
| 24 | import org.onlab.onos.net.host.HostEvent; |
| 25 | import org.onlab.onos.net.host.HostListener; |
| 26 | import org.onlab.onos.net.host.HostService; |
| 27 | import org.onlab.onos.net.link.LinkEvent; |
| 28 | import org.onlab.onos.net.link.LinkListener; |
| 29 | import org.onlab.onos.net.link.LinkService; |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 30 | import org.onlab.onos.net.topology.TopologyEvent; |
| 31 | import org.onlab.onos.net.topology.TopologyListener; |
| 32 | import org.onlab.onos.net.topology.TopologyService; |
| 33 | import org.slf4j.Logger; |
| 34 | |
| 35 | /** |
| 36 | * ONOS Topology Metrics Application that collects topology-related metrics. |
| 37 | */ |
| 38 | @Component(immediate = true) |
| 39 | @Service |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 40 | public class TopologyMetrics implements TopologyMetricsService { |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 41 | private static final Logger log = getLogger(TopologyMetrics.class); |
| 42 | |
| 43 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 44 | protected DeviceService deviceService; |
| 45 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 46 | protected HostService hostService; |
| 47 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 48 | protected LinkService linkService; |
| 49 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 50 | protected TopologyService topologyService; |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 51 | |
| 52 | private LinkedList<Event> lastEvents = new LinkedList<>(); |
| 53 | private static final int LAST_EVENTS_MAX_N = 100; |
| 54 | |
| 55 | private final DeviceListener deviceListener = new InnerDeviceListener(); |
| 56 | private final HostListener hostListener = new InnerHostListener(); |
| 57 | private final LinkListener linkListener = new InnerLinkListener(); |
| 58 | private final TopologyListener topologyListener = |
| 59 | new InnerTopologyListener(); |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 60 | |
| 61 | // |
| 62 | // Metrics |
| 63 | // |
| 64 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 65 | protected MetricsService metricsService; |
| 66 | // |
| 67 | private static final String COMPONENT_NAME = "Topology"; |
| 68 | private static final String FEATURE_NAME = "EventNotification"; |
| 69 | private static final String GAUGE_NAME = "LastEventTimestamp.EpochMs"; |
| 70 | private static final String METER_NAME = "EventRate"; |
| 71 | // |
| 72 | private MetricsComponent metricsComponent; |
| 73 | private MetricsFeature metricsFeatureEventNotification; |
| 74 | // |
| 75 | // Timestamp of the last Topology event (ms from the Epoch) |
| 76 | private volatile long lastEventTimestampEpochMs = 0; |
| 77 | private Gauge<Long> lastEventTimestampEpochMsGauge; |
| 78 | // Rate of the Topology events published to the Topology listeners |
| 79 | private Meter eventRateMeter; |
| 80 | |
| 81 | @Activate |
| 82 | protected void activate() { |
| 83 | clear(); |
| 84 | registerMetrics(); |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 85 | |
| 86 | // Register for all topology-related events |
| 87 | deviceService.addListener(deviceListener); |
| 88 | hostService.addListener(hostListener); |
| 89 | linkService.addListener(linkListener); |
| 90 | topologyService.addListener(topologyListener); |
| 91 | |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 92 | log.info("ONOS Topology Metrics started."); |
| 93 | } |
| 94 | |
| 95 | @Deactivate |
| 96 | public void deactivate() { |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 97 | // De-register from all topology-related events |
| 98 | deviceService.removeListener(deviceListener); |
| 99 | hostService.removeListener(hostListener); |
| 100 | linkService.removeListener(linkListener); |
| 101 | topologyService.removeListener(topologyListener); |
| 102 | |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 103 | removeMetrics(); |
| 104 | clear(); |
| 105 | log.info("ONOS Topology Metrics stopped."); |
| 106 | } |
| 107 | |
| 108 | @Override |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 109 | public List<Event> getEvents() { |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 110 | synchronized (lastEvents) { |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 111 | return ImmutableList.<Event>copyOf(lastEvents); |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 112 | } |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | public Gauge<Long> lastEventTimestampEpochMsGauge() { |
| 117 | return lastEventTimestampEpochMsGauge; |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public Meter eventRateMeter() { |
| 122 | return eventRateMeter; |
| 123 | } |
| 124 | |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 125 | /** |
| 126 | * Records an event. |
| 127 | * |
| 128 | * @param event the event to record |
| 129 | * @param updateEventRateMeter if true, update the Event Rate Meter |
| 130 | */ |
| 131 | private void recordEvent(Event event, boolean updateEventRateMeter) { |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 132 | synchronized (lastEvents) { |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 133 | lastEventTimestampEpochMs = System.currentTimeMillis(); |
| 134 | if (updateEventRateMeter) { |
| 135 | eventRateMeter.mark(1); |
| 136 | } |
| 137 | |
| 138 | // |
| 139 | // Keep only the last N events, where N = LAST_EVENTS_MAX_N |
| 140 | // |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 141 | while (lastEvents.size() >= LAST_EVENTS_MAX_N) { |
| 142 | lastEvents.remove(); |
| 143 | } |
| 144 | lastEvents.add(event); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /** |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 149 | * Inner Device Event Listener class. |
| 150 | */ |
| 151 | private class InnerDeviceListener implements DeviceListener { |
| 152 | @Override |
| 153 | public void event(DeviceEvent event) { |
| 154 | recordEvent(event, true); |
| 155 | log.debug("Device Event: time = {} type = {} event = {}", |
| 156 | event.time(), event.type(), event); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Inner Host Event Listener class. |
| 162 | */ |
| 163 | private class InnerHostListener implements HostListener { |
| 164 | @Override |
| 165 | public void event(HostEvent event) { |
| 166 | recordEvent(event, true); |
| 167 | log.debug("Host Event: time = {} type = {} event = {}", |
| 168 | event.time(), event.type(), event); |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * Inner Link Event Listener class. |
| 174 | */ |
| 175 | private class InnerLinkListener implements LinkListener { |
| 176 | @Override |
| 177 | public void event(LinkEvent event) { |
| 178 | recordEvent(event, true); |
| 179 | log.debug("Link Event: time = {} type = {} event = {}", |
| 180 | event.time(), event.type(), event); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Inner Topology Event Listener class. |
| 186 | */ |
| 187 | private class InnerTopologyListener implements TopologyListener { |
| 188 | @Override |
| 189 | public void event(TopologyEvent event) { |
| 190 | // |
| 191 | // NOTE: Don't update the eventRateMeter, because the real |
| 192 | // events are already captured/counted. |
| 193 | // |
| 194 | recordEvent(event, false); |
| 195 | log.debug("Topology Event: time = {} type = {} event = {}", |
| 196 | event.time(), event.type(), event); |
| 197 | for (Event reason : event.reasons()) { |
| 198 | log.debug("Topology Event Reason: time = {} type = {} event = {}", |
| 199 | reason.time(), reason.type(), reason); |
| 200 | } |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | /** |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 205 | * Clears the internal state. |
| 206 | */ |
| 207 | private void clear() { |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 208 | synchronized (lastEvents) { |
Pavlin Radoslavov | 5ba8b28 | 2014-10-23 01:03:10 -0700 | [diff] [blame] | 209 | lastEventTimestampEpochMs = 0; |
Pavlin Radoslavov | 64d9e47 | 2014-10-21 22:01:08 -0700 | [diff] [blame] | 210 | lastEvents.clear(); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * Registers the metrics. |
| 216 | */ |
| 217 | private void registerMetrics() { |
| 218 | metricsComponent = metricsService.registerComponent(COMPONENT_NAME); |
| 219 | metricsFeatureEventNotification = |
| 220 | metricsComponent.registerFeature(FEATURE_NAME); |
| 221 | lastEventTimestampEpochMsGauge = |
| 222 | metricsService.registerMetric(metricsComponent, |
| 223 | metricsFeatureEventNotification, |
| 224 | GAUGE_NAME, |
| 225 | new Gauge<Long>() { |
| 226 | @Override |
| 227 | public Long getValue() { |
| 228 | return lastEventTimestampEpochMs; |
| 229 | } |
| 230 | }); |
| 231 | eventRateMeter = |
| 232 | metricsService.createMeter(metricsComponent, |
| 233 | metricsFeatureEventNotification, |
| 234 | METER_NAME); |
| 235 | |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * Removes the metrics. |
| 240 | */ |
| 241 | private void removeMetrics() { |
| 242 | metricsService.removeMetric(metricsComponent, |
| 243 | metricsFeatureEventNotification, |
| 244 | GAUGE_NAME); |
| 245 | metricsService.removeMetric(metricsComponent, |
| 246 | metricsFeatureEventNotification, |
| 247 | METER_NAME); |
| 248 | } |
| 249 | } |