/*
* Copyright 2012-2017 the original author or authors.
*
* 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.springframework.boot.actuate.metrics.buffer;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Collection;
import java.util.HashSet;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.LongAdder;
import java.util.function.Consumer;
import com.codahale.metrics.MetricRegistry;
import org.junit.BeforeClass;
import org.junit.experimental.theories.DataPoints;
import org.junit.experimental.theories.Theories;
import org.junit.experimental.theories.Theory;
import org.junit.runner.RunWith;
import org.springframework.boot.actuate.metrics.CounterService;
import org.springframework.boot.actuate.metrics.Metric;
import org.springframework.boot.actuate.metrics.dropwizard.DropwizardMetricServices;
import org.springframework.boot.actuate.metrics.reader.MetricReader;
import org.springframework.boot.actuate.metrics.reader.MetricRegistryMetricReader;
import org.springframework.util.StopWatch;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Speeds tests for {@link DropwizardMetricServices DropwizardMetricServices'}
* {@link CounterService}.
*
* @author Dave Syer
*/
@RunWith(Theories.class)
public class DropwizardCounterServiceSpeedTests {
@DataPoints
public static String[] values = new String[10];
public static String[] names = new String[] { "foo", "bar", "spam", "bucket" };
public static String[] sample = new String[1000];
private MetricRegistry registry = new MetricRegistry();
private CounterService counterService = new DropwizardMetricServices(this.registry);
private MetricReader reader = new MetricRegistryMetricReader(this.registry);
private static int threadCount = 2;
private static final int number = Boolean.getBoolean("performance.test") ? 10000000
: 1000000;
private static int count;
private static StopWatch watch = new StopWatch("count");
private static PrintWriter err;
@BeforeClass
public static void prime() throws FileNotFoundException {
err = new NullPrintWriter();
final Random random = new Random();
for (int i = 0; i < 1000; i++) {
sample[i] = names[random.nextInt(names.length)];
}
}
@Theory
public void counters(String input) throws Exception {
watch.start("counters" + count++);
ExecutorService pool = Executors.newFixedThreadPool(threadCount);
Runnable task = new Runnable() {
@Override
public void run() {
for (int i = 0; i < number; i++) {
String name = sample[i % sample.length];
DropwizardCounterServiceSpeedTests.this.counterService
.increment(name);
}
}
};
Collection<Future<?>> futures = new HashSet<>();
for (int i = 0; i < threadCount; i++) {
futures.add(pool.submit(task));
}
for (Future<?> future : futures) {
future.get();
}
watch.stop();
double rate = number / watch.getLastTaskTimeMillis() * 1000;
System.err.println("Counters rate(" + count + ")=" + rate + ", " + watch);
watch.start("read" + count);
this.reader.findAll().forEach(new Consumer<Metric<?>>() {
@Override
public void accept(Metric<?> metric) {
err.println(metric);
}
});
final LongAdder total = new LongAdder();
this.reader.findAll().forEach(new Consumer<Metric<?>>() {
@Override
public void accept(Metric<?> value) {
total.add(value.getValue().intValue());
}
});
watch.stop();
System.err.println("Read(" + count + ")=" + watch.getLastTaskTimeMillis() + "ms");
assertThat(total.longValue()).isEqualTo(number * threadCount);
}
}