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/*
* 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.intentperf;
import com.google.common.collect.ImmutableList;
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.cluster.ClusterService;
import org.onosproject.cluster.ControllerNode;
import org.onosproject.cluster.NodeId;
import org.onosproject.store.cluster.messaging.ClusterCommunicationService;
import org.onosproject.store.cluster.messaging.ClusterMessage;
import org.onosproject.store.cluster.messaging.ClusterMessageHandler;
import org.onosproject.store.cluster.messaging.MessageSubject;
import org.slf4j.Logger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import static org.onlab.util.SharedExecutors.getPoolThreadExecutor;
import static org.slf4j.LoggerFactory.getLogger;
/**
* Collects and distributes performance samples.
*/
@Component(immediate = true)
@Service(value = IntentPerfCollector.class)
public class IntentPerfCollector {
private static final long SAMPLE_TIME_WINDOW_MS = 5_000;
private final Logger log = getLogger(getClass());
private static final int MAX_SAMPLES = 1_000;
private final List<Sample> samples = new LinkedList<>();
private static final MessageSubject SAMPLE = new MessageSubject("intent-perf-sample");
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected ClusterCommunicationService communicationService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected ClusterService clusterService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected IntentPerfUi ui;
// Auxiliary structures used to accrue data for normalized time interval
// across all nodes.
private long newestTime;
private Sample overall;
private Sample current;
private ControllerNode[] nodes;
private Map<NodeId, Integer> nodeToIndex;
private NodeId nodeId;
@Activate
public void activate() {
nodeId = clusterService.getLocalNode().id();
communicationService.addSubscriber(SAMPLE, new InternalSampleCollector(),
getPoolThreadExecutor());
nodes = clusterService.getNodes().toArray(new ControllerNode[]{});
Arrays.sort(nodes, (a, b) -> a.id().toString().compareTo(b.id().toString()));
nodeToIndex = new HashMap<>();
for (int i = 0; i < nodes.length; i++) {
nodeToIndex.put(nodes[i].id(), i);
}
clearSamples();
ui.setCollector(this);
log.info("Started");
}
@Deactivate
public void deactivate() {
communicationService.removeSubscriber(SAMPLE);
log.info("Stopped");
}
/**
* Clears all previously accumulated data.
*/
public synchronized void clearSamples() {
newestTime = 0;
overall = new Sample(0, nodes.length);
current = new Sample(0, nodes.length);
samples.clear();
}
/**
* Records a sample point of data about intent operation rate.
*
* @param overallRate overall rate
* @param currentRate current rate
*/
public void recordSample(double overallRate, double currentRate) {
long now = System.currentTimeMillis();
addSample(now, nodeId, overallRate, currentRate);
broadcastSample(now, nodeId, overallRate, currentRate);
}
/**
* Returns set of node ids as headers.
*
* @return node id headers
*/
public List<String> getSampleHeaders() {
List<String> headers = new ArrayList<>();
for (ControllerNode node : nodes) {
headers.add(node.id().toString());
}
return headers;
}
/**
* Returns set of all accumulated samples normalized to the local set of
* samples.
*
* @return accumulated samples
*/
public synchronized List<Sample> getSamples() {
return ImmutableList.copyOf(samples);
}
/**
* Returns overall throughput performance for each of the cluster nodes.
*
* @return overall intent throughput
*/
public synchronized Sample getOverall() {
return overall;
}
// Records a new sample to our collection of samples
private synchronized void addSample(long time, NodeId nodeId,
double overallRate, double currentRate) {
Sample fullSample = createCurrentSampleIfNeeded(time);
setSampleData(current, nodeId, currentRate);
setSampleData(overall, nodeId, overallRate);
pruneSamplesIfNeeded();
if (fullSample != null && ui != null) {
ui.reportSample(fullSample);
}
}
private Sample createCurrentSampleIfNeeded(long time) {
Sample oldSample = time - newestTime > SAMPLE_TIME_WINDOW_MS || current.isComplete() ? current : null;
if (oldSample != null) {
newestTime = time;
current = new Sample(time, nodes.length);
if (oldSample.time > 0) {
samples.add(oldSample);
}
}
return oldSample;
}
private void setSampleData(Sample sample, NodeId nodeId, double data) {
Integer index = nodeToIndex.get(nodeId);
if (index != null) {
sample.data[index] = data;
}
}
private void pruneSamplesIfNeeded() {
if (samples.size() > MAX_SAMPLES) {
samples.remove(0);
}
}
// Performance data sample.
static class Sample {
final long time;
final double[] data;
public Sample(long time, int nodeCount) {
this.time = time;
this.data = new double[nodeCount];
Arrays.fill(data, -1);
}
public boolean isComplete() {
for (int i = 0; i < data.length; i++) {
if (data[i] < 0) {
return false;
}
}
return true;
}
}
private void broadcastSample(long time, NodeId nodeId, double overallRate, double currentRate) {
String data = String.format("%d|%f|%f", time, overallRate, currentRate);
communicationService.broadcast(data, SAMPLE, str -> str.getBytes());
}
private class InternalSampleCollector implements ClusterMessageHandler {
@Override
public void handle(ClusterMessage message) {
String[] fields = new String(message.payload()).split("\\|");
log.debug("Received sample from {}: {}", message.sender(), fields);
addSample(Long.parseLong(fields[0]), message.sender(),
Double.parseDouble(fields[1]), Double.parseDouble(fields[2]));
}
}
}
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