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/*
* Copyright 2014-2015 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.metrics.topology.cli;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.Meter;
import com.codahale.metrics.json.MetricsModule;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.apache.karaf.shell.commands.Command;
import org.onlab.metrics.EventMetric;
import org.onosproject.cli.AbstractShellCommand;
import org.onosproject.metrics.topology.TopologyMetricsService;
/**
* Command to show the topology events metrics.
*/
@Command(scope = "onos", name = "topology-events-metrics",
description = "Lists topology events metrics")
public class TopologyEventsMetricsCommand extends AbstractShellCommand {
private static final String FORMAT_GAUGE =
"Topology %s Event Timestamp (ms from epoch)=%d";
private static final String FORMAT_METER =
"Topology %s Events count=%d rate(events/sec) mean=%f m1=%f m5=%f m15=%f";
@Override
protected void execute() {
TopologyMetricsService service = get(TopologyMetricsService.class);
if (outputJson()) {
ObjectMapper mapper = new ObjectMapper()
.registerModule(new MetricsModule(TimeUnit.SECONDS,
TimeUnit.MILLISECONDS,
false));
ObjectNode result = mapper.createObjectNode();
result = json(mapper, result, "topologyDeviceEvent",
service.topologyDeviceEventMetric());
result = json(mapper, result, "topologyHostEvent",
service.topologyHostEventMetric());
result = json(mapper, result, "topologyLinkEvent",
service.topologyLinkEventMetric());
result = json(mapper, result, "topologyGraphEvent",
service.topologyGraphEventMetric());
result = json(mapper, result, "topologyGraphReasonsEvent",
service.topologyGraphReasonsEventMetric());
print("%s", result);
} else {
printEventMetric("Device", service.topologyDeviceEventMetric());
printEventMetric("Host", service.topologyHostEventMetric());
printEventMetric("Link", service.topologyLinkEventMetric());
printEventMetric("Graph", service.topologyGraphEventMetric());
printEventMetric("Graph Reasons",
service.topologyGraphReasonsEventMetric());
}
}
/**
* Produces JSON node for an Event Metric.
*
* @param mapper the JSON object mapper to use
* @param objectNode the JSON object node to use
* @param propertyPrefix the property prefix to use
* @param eventMetric the Event Metric with the data
* @return JSON object node for the Event Metric
*/
private ObjectNode json(ObjectMapper mapper, ObjectNode objectNode,
String propertyPrefix, EventMetric eventMetric) {
String gaugeName = propertyPrefix + "Timestamp";
String meterName = propertyPrefix + "Rate";
Gauge<Long> gauge = eventMetric.lastEventTimestampGauge();
Meter meter = eventMetric.eventRateMeter();
objectNode.set(gaugeName, json(mapper, gauge));
objectNode.set(meterName, json(mapper, meter));
return objectNode;
}
/**
* Produces JSON node for an Object.
*
* @param mapper the JSON object mapper to use
* @param object the Object with the data
* @return JSON node for the Object
*/
private JsonNode json(ObjectMapper mapper, Object object) {
//
// NOTE: The API for custom serializers is incomplete,
// hence we have to parse the JSON string to create JsonNode.
//
try {
final String objectJson = mapper.writeValueAsString(object);
JsonNode jsonNode = mapper.readTree(objectJson);
return jsonNode;
} catch (JsonProcessingException e) {
log.error("Error writing value as JSON string", e);
} catch (IOException e) {
log.error("Error writing value as JSON string", e);
}
return null;
}
/**
* Prints an Event Metric.
*
* @param operationStr the string with the intent operation to print
* @param eventMetric the Event Metric to print
*/
private void printEventMetric(String operationStr,
EventMetric eventMetric) {
Gauge<Long> gauge = eventMetric.lastEventTimestampGauge();
Meter meter = eventMetric.eventRateMeter();
TimeUnit rateUnit = TimeUnit.SECONDS;
double rateFactor = rateUnit.toSeconds(1);
// Print the Gauge
print(FORMAT_GAUGE, operationStr, gauge.getValue());
// Print the Meter
print(FORMAT_METER, operationStr, meter.getCount(),
meter.getMeanRate() * rateFactor,
meter.getOneMinuteRate() * rateFactor,
meter.getFiveMinuteRate() * rateFactor,
meter.getFifteenMinuteRate() * rateFactor);
}
}
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