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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.metrics;
import org.junit.Test;
import java.util.concurrent.TimeUnit;
import static org.junit.Assert.*;
/**
* @author thomasg
*/
public class MetricManagerTest {
@Test
public void requireThatManagerCanBeStopped() throws InterruptedException {
final MetricManager manager = new MetricManager(new DummyTimer());
Thread managerThread = new Thread(manager);
managerThread.start();
Thread stopThread = new Thread(new Runnable() {
@Override
public void run() {
manager.stop();
}
});
stopThread.start();
stopThread.join(TimeUnit.SECONDS.toMillis(60));
assertFalse(stopThread.isAlive());
managerThread.join(TimeUnit.SECONDS.toMillis(60));
assertFalse(managerThread.isAlive());
}
@Test
public void requireThatManagerCanBeStoppedBeforeStarting() throws InterruptedException {
final MetricManager manager = new MetricManager(new DummyTimer());
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
manager.stop();
}
});
thread.start();
thread.join(TimeUnit.SECONDS.toMillis(60));
assertFalse(thread.isAlive());
}
@Test
public void requireThatManagerCanNotBeStartedAfterItHasBeenStopped() {
final MetricManager manager = new MetricManager(new DummyTimer());
manager.stop();
try {
manager.run();
fail();
} catch (IllegalStateException e) {
}
}
@Test
public void testSimpleLogging() {
DummyTimer timer = new DummyTimer();
MetricManager manager = new MetricManager(timer);
SimpleMetricSet sms = new SimpleMetricSet("foo", "", "", null);
manager.registerMetric(sms);
CountMetric bar = new CountMetric("bar", "", "", sms);
bar.inc(3);
manager.addMetricToConsumer("log", "foo.bar");
DummyEventLogger logger = new DummyEventLogger();
manager.tick(logger);
//assertEquals("CNT foo_bar: 0\n", logger.output);
timer.ms = 300000;
manager.tick(logger);
assertEquals("CNT foo_bar: 0\nCNT foo_bar: 3\n", logger.output.toString());
}
@Test
public void testSumLogging() {
DummyTimer timer = new DummyTimer();
MetricManager manager = new MetricManager(timer);
SimpleMetricSet sms = new SimpleMetricSet("foo", "", "", null);
manager.registerMetric(sms);
CountMetric v1 = new CountMetric("v1", "", "", sms);
CountMetric v2 = new CountMetric("v2", "", "", sms);
CountMetric v3 = new CountMetric("v3", "", "", sms);
SumMetric sum = new SumMetric("sum", "", "", sms);
sum.addMetricToSum(v1);
sum.addMetricToSum(v2);
sum.addMetricToSum(v3);
v1.inc(3);
v2.inc(1);
v3.inc(2);
manager.addMetricToConsumer("log", "foo.sum");
DummyEventLogger logger = new DummyEventLogger();
manager.tick(logger);
assertEquals("CNT foo_sum: 0\n", logger.output.toString());
timer.ms = 300000;
manager.tick(logger);
assertEquals("CNT foo_sum: 0\nCNT foo_sum: 6\n", logger.output.toString());
}
@Test
public void testSumAndSetLogging() {
DummyTimer timer = new DummyTimer();
timer.ms = 1000000;
MetricManager manager = new MetricManager(timer);
SimpleMetricSet sms = new SimpleMetricSet("foo", "", "", null);
manager.registerMetric(sms);
SimpleMetricSet v1 = new SimpleMetricSet("v1", "", "", sms);
SimpleMetricSet v2 = new SimpleMetricSet("v2", "", "", sms);
CountMetric v1_a = new CountMetric("a", "", "", v1);
SummedLongValueMetric v1_b = new SummedLongValueMetric("b", "", "", v1);
AveragedLongValueMetric v1_c = new AveragedLongValueMetric("c", "", "", v1);
CountMetric v2_a = new CountMetric("a", "", "", v2);
SummedLongValueMetric v2_b = new SummedLongValueMetric("b", "", "", v2);
AveragedLongValueMetric v2_c = new AveragedLongValueMetric("c", "", "", v2);
SumMetric sum = new SumMetric("sum", "", "", sms);
sum.addMetricToSum(v1);
sum.addMetricToSum(v2);
v1_a.inc(3);
v1_b.addValue((long)1);
v1_c.addValue((long)4);
v2_a.inc(2);
v2_b.addValue((long)2);
v2_c.addValue((long)8);
manager.addMetricToConsumer("log", "foo.sum.a");
manager.addMetricToConsumer("log", "foo.sum.b");
manager.addMetricToConsumer("log", "foo.sum.c");
{
DummyEventLogger logger = new DummyEventLogger();
assertEquals(300000, manager.tick(logger));
assertEquals("CNT foo_sum_a: 0\n", logger.output.toString());
}
timer.ms = 1300000;
{
DummyEventLogger logger = new DummyEventLogger();
assertEquals(300000, manager.tick(logger));
assertEquals("CNT foo_sum_a: 5\nVAL foo_sum_b: 3.0\nVAL foo_sum_c: 6.0\n", logger.output.toString());
}
v1_a.inc(4);
v1_b.addValue((long)2);
v1_b.addValue((long)6);
v2_b.addValue((long)4);
timer.ms = 1600000;
{
DummyEventLogger logger = new DummyEventLogger();
assertEquals(300000, manager.tick(logger));
assertEquals("CNT foo_sum_a: 9\nVAL foo_sum_b: 10.0\n", logger.output.toString());
}
}
private static class DummyEventLogger implements EventLogger {
StringBuilder output = new StringBuilder();
@Override
public void value(String name, double value) {
output.append("VAL " + name + ": " + value + "\n");
}
@Override
public void count(String name, long value) {
output.append("CNT " + name + ": " + value + "\n");
}
}
}
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