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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.concurrent.maintenance;
import com.yahoo.concurrent.UncheckedTimeoutException;
import org.junit.Test;
import java.time.Duration;
import java.time.Instant;
import java.util.List;
import static org.junit.Assert.assertEquals;
/**
* @author freva
*/
public class MaintainerTest {
private static final double delta = 0.000001;
private final JobControl jobControl = new JobControl(new JobControlStateMock());
@Test
public void staggering() {
List<String> cluster = List.of("cfg1", "cfg2", "cfg3");
Duration interval = Duration.ofMillis(300);
Instant now = Instant.ofEpochMilli(1000);
assertEquals(200, Maintainer.staggeredDelay(interval, now, "cfg1", cluster).toMillis());
assertEquals(0, Maintainer.staggeredDelay(interval, now, "cfg2", cluster).toMillis());
assertEquals(100, Maintainer.staggeredDelay(interval, now, "cfg3", cluster).toMillis());
now = Instant.ofEpochMilli(1001);
assertEquals(199, Maintainer.staggeredDelay(interval, now, "cfg1", cluster).toMillis());
assertEquals(299, Maintainer.staggeredDelay(interval, now, "cfg2", cluster).toMillis());
assertEquals(99, Maintainer.staggeredDelay(interval, now, "cfg3", cluster).toMillis());
now = Instant.ofEpochMilli(1101);
assertEquals(99, Maintainer.staggeredDelay(interval, now, "cfg1", cluster).toMillis());
assertEquals(199, Maintainer.staggeredDelay(interval, now, "cfg2", cluster).toMillis());
assertEquals(299, Maintainer.staggeredDelay(interval, now, "cfg3", cluster).toMillis());
assertEquals(300, Maintainer.staggeredDelay(interval, now, "cfg0", cluster).toMillis());
}
@Test
public void success_metric() {
TestJobMetrics jobMetrics = new TestJobMetrics();
TestMaintainer maintainer = new TestMaintainer(null, jobControl, jobMetrics);
maintainer.successOnNextRun(1.0).run();
assertEquals(1, jobMetrics.successFactor, delta);
maintainer.successOnNextRun(0.0).run();
assertEquals(0, jobMetrics.successFactor, delta);
maintainer.successOnNextRun(0.1).run();
assertEquals(0.1, jobMetrics.successFactor, delta);
// Maintainer throws
maintainer.throwOnNextRun(new RuntimeException()).run();
assertEquals(0, jobMetrics.successFactor, delta);
// Maintainer recovers
maintainer.throwOnNextRun(null).run();
maintainer.successOnNextRun(1.0).run();
assertEquals(1, jobMetrics.successFactor, delta);
// Lock exception is treated as a failure
maintainer.throwOnNextRun(new UncheckedTimeoutException()).run();
assertEquals(0, jobMetrics.successFactor, delta);
}
private static class TestJobMetrics extends JobMetrics {
double successFactor = 0.0;
@Override
public void completed(String job, double successFactor) {
this.successFactor = successFactor;
}
}
}
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