1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.concurrent.maintenance;
import com.google.common.util.concurrent.UncheckedTimeoutException;
import org.junit.Test;
import java.time.Duration;
import java.time.Instant;
import java.util.List;
import java.util.concurrent.atomic.AtomicLong;
import static org.junit.Assert.assertEquals;
/**
* @author freva
*/
public class MaintainerTest {
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 fails twice in a row
maintainer.successOnNextRun(false).run();
assertEquals(1, jobMetrics.consecutiveFailures.get());
maintainer.successOnNextRun(false).run();
assertEquals(2, jobMetrics.consecutiveFailures.get());
// Maintainer runs successfully
maintainer.successOnNextRun(true).run();
assertEquals(0, jobMetrics.consecutiveFailures.get());
// Maintainer runs successfully again
maintainer.run();
assertEquals(0, jobMetrics.consecutiveFailures.get());
// Maintainer throws
maintainer.throwOnNextRun(new RuntimeException()).run();
assertEquals(1, jobMetrics.consecutiveFailures.get());
// Maintainer recovers
maintainer.throwOnNextRun(null).run();
assertEquals(0, jobMetrics.consecutiveFailures.get());
// Lock exception is treated as a failure
maintainer.throwOnNextRun(new UncheckedTimeoutException()).run();
assertEquals(1, jobMetrics.consecutiveFailures.get());
}
private static class TestJobMetrics extends JobMetrics {
AtomicLong consecutiveFailures = new AtomicLong();
@Override
protected void consume(String job, Long incompleteRuns) {
consecutiveFailures.set(incompleteRuns);
}
}
}
|