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Update the TopologyMetrics module to listen for all topology-related events:

Browse Source 
Devices, Hosts, Links, TopologyEvent

Now the semantics for updating the metrics are:
 * Any topology-related event (DeviceEvent, HostEvent, LinkEvent,
   TopologyEvent) will update the Lost Topology Event Timestamp
 * Only the DeviceEvent, HostEvent and LinkEvent will be counted in
   measuring the event rate; TopologyEvent is excluded, because it
   is generated as a result of some of those events

Also, increased the number of saved events from 10 to 100.

Change-Id: Ie759ee69869cddc617d7ad5b8b75a622e2571620
This commit is contained in:
Pavlin Radoslavov 2014-10-23 01:03:10 -07:00
parent 558e893766
commit 5ba8b28e76
3 changed files with 138 additions and 65 deletions
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141
apps/metrics/topology/src/main/java/org/onlab/onos/metrics/topology/TopologyMetrics.java
View File

@ -18,6 +18,15 @@ import org.onlab.metrics.MetricsComponent;
import org.onlab.metrics.MetricsFeature;
import org.onlab.metrics.MetricsService;
import org.onlab.onos.event.Event;
import org.onlab.onos.net.device.DeviceEvent;
import org.onlab.onos.net.device.DeviceListener;
import org.onlab.onos.net.device.DeviceService;
import org.onlab.onos.net.host.HostEvent;
import org.onlab.onos.net.host.HostListener;
import org.onlab.onos.net.host.HostService;
import org.onlab.onos.net.link.LinkEvent;
import org.onlab.onos.net.link.LinkListener;
import org.onlab.onos.net.link.LinkService;
import org.onlab.onos.net.topology.TopologyEvent;
import org.onlab.onos.net.topology.TopologyListener;
import org.onlab.onos.net.topology.TopologyService;
@ -28,14 +37,26 @@ import org.slf4j.Logger;
*/
@Component(immediate = true)
@Service
public class TopologyMetrics implements TopologyMetricsService,
TopologyListener {
public class TopologyMetrics implements TopologyMetricsService {
private static final Logger log = getLogger(TopologyMetrics.class);
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected DeviceService deviceService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected HostService hostService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected LinkService linkService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected TopologyService topologyService;
private LinkedList<TopologyEvent> lastEvents = new LinkedList<>();
private static final int LAST_EVENTS_MAX_N = 10;
private LinkedList<Event> lastEvents = new LinkedList<>();
private static final int LAST_EVENTS_MAX_N = 100;
private final DeviceListener deviceListener = new InnerDeviceListener();
private final HostListener hostListener = new InnerHostListener();
private final LinkListener linkListener = new InnerLinkListener();
private final TopologyListener topologyListener =
new InnerTopologyListener();
//
// Metrics
@ -61,22 +82,33 @@ public class TopologyMetrics implements TopologyMetricsService,
protected void activate() {
clear();
registerMetrics();
topologyService.addListener(this);
// Register for all topology-related events
deviceService.addListener(deviceListener);
hostService.addListener(hostListener);
linkService.addListener(linkListener);
topologyService.addListener(topologyListener);
log.info("ONOS Topology Metrics started.");
}
@Deactivate
public void deactivate() {
topologyService.removeListener(this);
// De-register from all topology-related events
deviceService.removeListener(deviceListener);
hostService.removeListener(hostListener);
linkService.removeListener(linkListener);
topologyService.removeListener(topologyListener);
removeMetrics();
clear();
log.info("ONOS Topology Metrics stopped.");
}
@Override
public List<TopologyEvent> getEvents() {
public List<Event> getEvents() {
synchronized (lastEvents) {
return ImmutableList.<TopologyEvent>copyOf(lastEvents);
return ImmutableList.<Event>copyOf(lastEvents);
}
}
@ -90,27 +122,22 @@ public class TopologyMetrics implements TopologyMetricsService,
return eventRateMeter;
}
@Override
public void event(TopologyEvent event) {
lastEventTimestampEpochMs = System.currentTimeMillis();
//
// NOTE: If we want to count each "reason" as a separate event,
// then we should use 'event.reason().size()' instead of '1' to
// mark the meter below.
//
eventRateMeter.mark(1);
log.debug("Topology Event: time = {} type = {} subject = {}",
event.time(), event.type(), event.subject());
for (Event reason : event.reasons()) {
log.debug("Topology Event Reason: time = {} type = {} subject = {}",
reason.time(), reason.type(), reason.subject());
}
//
// Keep only the last N events, where N = LAST_EVENTS_MAX_N
//
/**
* Records an event.
*
* @param event the event to record
* @param updateEventRateMeter if true, update the Event Rate Meter
*/
private void recordEvent(Event event, boolean updateEventRateMeter) {
synchronized (lastEvents) {
lastEventTimestampEpochMs = System.currentTimeMillis();
if (updateEventRateMeter) {
eventRateMeter.mark(1);
}
//
// Keep only the last N events, where N = LAST_EVENTS_MAX_N
//
while (lastEvents.size() >= LAST_EVENTS_MAX_N) {
lastEvents.remove();
}
@ -118,12 +145,68 @@ public class TopologyMetrics implements TopologyMetricsService,
}
}
/**
* Inner Device Event Listener class.
*/
private class InnerDeviceListener implements DeviceListener {
@Override
public void event(DeviceEvent event) {
recordEvent(event, true);
log.debug("Device Event: time = {} type = {} event = {}",
event.time(), event.type(), event);
}
}
/**
* Inner Host Event Listener class.
*/
private class InnerHostListener implements HostListener {
@Override
public void event(HostEvent event) {
recordEvent(event, true);
log.debug("Host Event: time = {} type = {} event = {}",
event.time(), event.type(), event);
}
}
/**
* Inner Link Event Listener class.
*/
private class InnerLinkListener implements LinkListener {
@Override
public void event(LinkEvent event) {
recordEvent(event, true);
log.debug("Link Event: time = {} type = {} event = {}",
event.time(), event.type(), event);
}
}
/**
* Inner Topology Event Listener class.
*/
private class InnerTopologyListener implements TopologyListener {
@Override
public void event(TopologyEvent event) {
//
// NOTE: Don't update the eventRateMeter, because the real
// events are already captured/counted.
//
recordEvent(event, false);
log.debug("Topology Event: time = {} type = {} event = {}",
event.time(), event.type(), event);
for (Event reason : event.reasons()) {
log.debug("Topology Event Reason: time = {} type = {} event = {}",
reason.time(), reason.type(), reason);
}
}
}
/**
* Clears the internal state.
*/
private void clear() {
lastEventTimestampEpochMs = 0;
synchronized (lastEvents) {
lastEventTimestampEpochMs = 0;
lastEvents.clear();
}
}

4
apps/metrics/topology/src/main/java/org/onlab/onos/metrics/topology/TopologyMetricsService.java
View File

@ -4,7 +4,7 @@ import java.util.List;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.Meter;
import org.onlab.onos.net.topology.TopologyEvent;
import org.onlab.onos.event.Event;
/**
* Service interface exported by TopologyMetrics.
@ -15,7 +15,7 @@ public interface TopologyMetricsService {
*
* @return the last saved topology events.
*/
public List<TopologyEvent> getEvents();
public List<Event> getEvents();
/**
* Gets the Metrics' Gauge for the last topology event timestamp

58
apps/metrics/topology/src/main/java/org/onlab/onos/metrics/topology/cli/TopologyEventsListCommand.java
View File

@ -19,10 +19,8 @@ import org.onlab.onos.net.topology.TopologyEvent;
description = "Lists the last topology events")
public class TopologyEventsListCommand extends AbstractShellCommand {
private static final String FORMAT_EVENT =
"Topology Event time=%d type=%s subject=%s";
private static final String FORMAT_REASON =
" Reason time=%d type=%s subject=%s";
private static final String FORMAT_EVENT = "Event=%s";
private static final String FORMAT_REASON = " Reason=%s";
@Override
protected void execute() {
@ -31,12 +29,13 @@ public class TopologyEventsListCommand extends AbstractShellCommand {
if (outputJson()) {
print("%s", json(service.getEvents()));
} else {
for (TopologyEvent event : service.getEvents()) {
print(FORMAT_EVENT, event.time(), event.type(),
event.subject());
for (Event reason : event.reasons()) {
print(FORMAT_REASON, reason.time(), reason.type(),
reason.subject());
for (Event event : service.getEvents()) {
print(FORMAT_EVENT, event);
if (event instanceof TopologyEvent) {
TopologyEvent topologyEvent = (TopologyEvent) event;
for (Event reason : topologyEvent.reasons()) {
print(FORMAT_REASON, reason);
}
}
print(""); // Extra empty line for clarity
}
@ -46,14 +45,14 @@ public class TopologyEventsListCommand extends AbstractShellCommand {
/**
* Produces a JSON array of topology events.
*
* @param topologyEvents the topology events with the data
* @param events the topology events with the data
* @return JSON array with the topology events
*/
private JsonNode json(List<TopologyEvent> topologyEvents) {
private JsonNode json(List<Event> events) {
ObjectMapper mapper = new ObjectMapper();
ArrayNode result = mapper.createArrayNode();
for (TopologyEvent event : topologyEvents) {
for (Event event : events) {
result.add(json(mapper, event));
}
return result;
@ -66,32 +65,23 @@ public class TopologyEventsListCommand extends AbstractShellCommand {
* @param topologyEvent the topology event with the data
* @return JSON object for the topology event
*/
private ObjectNode json(ObjectMapper mapper, TopologyEvent topologyEvent) {
ObjectNode result = mapper.createObjectNode();
ArrayNode reasons = mapper.createArrayNode();
for (Event reason : topologyEvent.reasons()) {
reasons.add(json(mapper, reason));
}
result.put("time", topologyEvent.time())
.put("type", topologyEvent.type().toString())
.put("subject", topologyEvent.subject().toString())
.put("reasons", reasons);
return result;
}
/**
* Produces JSON object for a generic event.
*
* @param event the generic event with the data
* @return JSON object for the generic event
*/
private ObjectNode json(ObjectMapper mapper, Event event) {
ObjectNode result = mapper.createObjectNode();
result.put("time", event.time())
.put("type", event.type().toString())
.put("subject", event.subject().toString());
.put("event", event.toString());
// Add the reasons if a TopologyEvent
if (event instanceof TopologyEvent) {
TopologyEvent topologyEvent = (TopologyEvent) event;
ArrayNode reasons = mapper.createArrayNode();
for (Event reason : topologyEvent.reasons()) {
reasons.add(json(mapper, reason));
}
result.put("reasons", reasons);
}
return result;
}
}