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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.statistics;
import static org.junit.Assert.*;
import java.util.Deque;
import java.util.List;
import com.yahoo.statistics.Statistics;
import org.junit.Test;
import com.yahoo.component.chain.Chain;
import com.yahoo.concurrent.LocalInstance;
import com.yahoo.concurrent.ThreadLocalDirectory;
import com.yahoo.search.Query;
import com.yahoo.search.Result;
import com.yahoo.search.Searcher;
import com.yahoo.search.result.Hit;
import com.yahoo.search.searchchain.Execution;
import com.yahoo.search.statistics.PeakQpsSearcher.QueryRatePerSecond;
/**
* Check peak QPS aggregation has a chance of working.
*
* @author <a href="mailto:steinar@yahoo-inc.com">Steinar Knutsen</a>
*/
public class PeakQpsTestCase {
static class Producer implements Runnable {
private final ThreadLocalDirectory<Deque<QueryRatePerSecond>, Long> rates;
Producer(ThreadLocalDirectory<Deque<QueryRatePerSecond>, Long> rates) {
this.rates = rates;
}
@Override
public void run() {
LocalInstance<Deque<QueryRatePerSecond>, Long> rate = rates.getLocalInstance();
rates.update(1L, rate);
rates.update(2L, rate);
rates.update(2L, rate);
rates.update(3L, rate);
rates.update(3L, rate);
rates.update(3L, rate);
rates.update(4L, rate);
rates.update(4L, rate);
rates.update(4L, rate);
rates.update(4L, rate);
}
}
static class LaterProducer implements Runnable {
private final ThreadLocalDirectory<Deque<QueryRatePerSecond>, Long> rates;
LaterProducer(ThreadLocalDirectory<Deque<QueryRatePerSecond>, Long> rates) {
this.rates = rates;
}
@Override
public void run() {
LocalInstance<Deque<QueryRatePerSecond>, Long> rate = rates.getLocalInstance();
rates.update(2L, rate);
rates.update(2L, rate);
rates.update(3L, rate);
rates.update(3L, rate);
rates.update(3L, rate);
rates.update(5L, rate);
rates.update(5L, rate);
rates.update(6L, rate);
rates.update(7L, rate);
}
}
@Test
public void checkBasicDataAggregation() {
ThreadLocalDirectory<Deque<QueryRatePerSecond>, Long> directory = PeakQpsSearcher.createDirectory();
final int threadCount = 20;
Thread[] threads = new Thread[threadCount];
for (int i = 0; i < threadCount; ++i) {
Producer p = new Producer(directory);
threads[i] = new Thread(p);
threads[i].start();
}
for (Thread t : threads) {
try {
t.join();
} catch (InterruptedException e) {
// nop
}
}
List<Deque<QueryRatePerSecond>> measurements = directory.fetch();
List<QueryRatePerSecond> results = PeakQpsSearcher.merge(measurements);
assertTrue(results.get(0).when == 1L);
assertTrue(results.get(0).howMany == threadCount);
assertTrue(results.get(1).when == 2L);
assertTrue(results.get(1).howMany == threadCount * 2);
assertTrue(results.get(2).when == 3L);
assertTrue(results.get(2).howMany == threadCount * 3);
assertTrue(results.get(3).when == 4L);
assertTrue(results.get(3).howMany == threadCount * 4);
}
@Test
public void checkMixedDataAggregation() {
ThreadLocalDirectory<Deque<QueryRatePerSecond>, Long> directory = PeakQpsSearcher.createDirectory();
final int firstThreads = 20;
final int secondThreads = 20;
final int threadCount = firstThreads + secondThreads;
Thread[] threads = new Thread[threadCount];
for (int i = 0; i < threadCount; ++i) {
if (i < firstThreads) {
Producer p = new Producer(directory);
threads[i] = new Thread(p);
} else {
LaterProducer p = new LaterProducer(directory);
threads[i] = new Thread(p);
}
threads[i].start();
}
for (Thread t : threads) {
try {
t.join();
} catch (InterruptedException e) {
// nop
}
}
List<Deque<QueryRatePerSecond>> measurements = directory.fetch();
List<QueryRatePerSecond> results = PeakQpsSearcher.merge(measurements);
assertTrue(results.size() == 7);
assertTrue(results.get(0).when == 1L);
assertTrue(results.get(0).howMany == firstThreads);
assertTrue(results.get(1).when == 2L);
assertTrue(results.get(1).howMany == threadCount * 2);
assertTrue(results.get(2).when == 3L);
assertTrue(results.get(2).howMany == threadCount * 3);
assertTrue(results.get(3).when == 4L);
assertTrue(results.get(3).howMany == firstThreads * 4);
assertTrue(results.get(4).when == 5L);
assertTrue(results.get(4).howMany == secondThreads * 2);
assertTrue(results.get(5).when == 6L);
assertTrue(results.get(5).howMany == secondThreads);
assertTrue(results.get(6).when == 7L);
assertTrue(results.get(6).howMany == secondThreads);
}
@Test
public void checkSearch() {
MeasureQpsConfig config = new MeasureQpsConfig(
new MeasureQpsConfig.Builder().outputmethod(
MeasureQpsConfig.Outputmethod.METAHIT).queryproperty(
"qpsprobe"));
Searcher s = new PeakQpsSearcher(config, Statistics.nullImplementation);
Chain<Searcher> c = new Chain<>(s);
Execution e = new Execution(c, Execution.Context.createContextStub());
e.search(new Query("/?query=a"));
new Execution(c, Execution.Context.createContextStub());
Result r = e.search(new Query("/?query=a&qpsprobe=true"));
final Hit hit = r.hits().get(0);
assertTrue(hit instanceof PeakQpsSearcher.QpsHit);
assertNotNull(hit.fields().get(PeakQpsSearcher.QpsHit.MEAN_QPS));
assertNotNull(hit.fields().get(PeakQpsSearcher.QpsHit.PEAK_QPS));
}
}
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