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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.container.handler;
import com.yahoo.container.QrSearchersConfig;
import com.yahoo.container.core.VipStatusConfig;
import com.yahoo.container.jdisc.state.StateMonitor;
import com.yahoo.jdisc.Metric;
import org.junit.jupiter.api.Test;
import java.util.Map;
import static org.junit.jupiter.api.Assertions.*;
/**
* @author bratseth
*/
public class VipStatusTestCase {
@Test
void testInitializingOrDownRequireAllUp() {
String[] clusters = {"cluster1", "cluster2", "cluster3"};
verifyStatus(clusters, StateMonitor.Status.initializing);
verifyStatus(clusters, StateMonitor.Status.down);
}
@Test
void testUpRequireAllDown() {
String[] clusters = {"cluster1", "cluster2", "cluster3"};
VipStatus v = createVipStatus(clusters, StateMonitor.Status.initializing, true, new ClustersStatus(), new MetricMock());
assertFalse(v.isInRotation());
addToRotation(clusters, v);
assertTrue(v.isInRotation());
v.removeFromRotation(clusters[0]);
assertTrue(v.isInRotation());
v.removeFromRotation(clusters[1]);
assertTrue(v.isInRotation());
v.removeFromRotation(clusters[2]);
assertFalse(v.isInRotation()); // All down
v.addToRotation(clusters[1]);
assertFalse(v.isInRotation());
v.addToRotation(clusters[0]);
v.addToRotation(clusters[2]);
assertTrue(v.isInRotation()); // All up
v.removeFromRotation(clusters[0]);
v.removeFromRotation(clusters[2]);
assertTrue(v.isInRotation());
v.addToRotation(clusters[0]);
v.addToRotation(clusters[2]);
assertTrue(v.isInRotation());
}
@Test
void testNoClustersConfiguringInitiallyInRotationFalse() {
String[] clusters = {};
VipStatus v = createVipStatus(clusters, StateMonitor.Status.initializing, false, new ClustersStatus(), new MetricMock());
assertFalse(v.isInRotation());
}
@Test
void testNoClustersConfiguringInitiallyInRotationTrue() {
String[] clusters = {};
VipStatus v = createVipStatus(clusters, StateMonitor.Status.initializing, true, new ClustersStatus(), new MetricMock());
assertTrue(v.isInRotation());
}
@Test
void testInRotationMetricFollowsRotationState() {
MetricMock metric = new MetricMock();
String[] clusters = {"cluster1", "cluster2", "cluster3"};
VipStatus v = createVipStatus(clusters, StateMonitor.Status.initializing, true, new ClustersStatus(), metric);
assertFalse(v.isInRotation());
assertEquals(0, metric.inRotation);
addToRotation(clusters, v);
assertTrue(v.isInRotation());
assertEquals(1, metric.inRotation);
}
@Test
void testClusterRemovalRemovedIsDown() {
assertClusterRemoval(true, false);
}
@Test
void testClusterRemovalRemovedIsUp() {
assertClusterRemoval(false, false);
}
@Test
void testClusterRemovalAnotherIsDown() {
assertClusterRemoval(false, true);
}
private void assertClusterRemoval(boolean removedIsDown, boolean anotherIsDown) {
ClustersStatus clustersStatus = new ClustersStatus();
StateMonitor stateMonitor = createStateMonitor(StateMonitor.Status.initializing);
String[] clusters = {"cluster1", "cluster2", "cluster3"};
VipStatus v = createVipStatus(clusters, true, clustersStatus, stateMonitor, new MetricMock());
assertFalse(v.isInRotation());
assertEquals(StateMonitor.Status.initializing, stateMonitor.status());
addToRotation(clusters, v);
assertTrue(v.isInRotation());
assertEquals(StateMonitor.Status.up, stateMonitor.status());
String[] newClusters = {"cluster2", "cluster3"};
if (removedIsDown)
v.removeFromRotation("cluster1");
if (anotherIsDown)
v.removeFromRotation("cluster3");
v = createVipStatus(newClusters, true, clustersStatus, stateMonitor, new MetricMock());
assertTrue(v.isInRotation());
assertEquals(StateMonitor.Status.up, stateMonitor.status());
v.removeFromRotation(newClusters[0]);
if ( ! anotherIsDown)
assertTrue(v.isInRotation());
v.removeFromRotation(newClusters[1]);
assertFalse(v.isInRotation()); // Both remaining clusters are out
assertEquals(StateMonitor.Status.down, stateMonitor.status());
}
private static QrSearchersConfig createSearchersConfig(String[] clusters) {
var b = new QrSearchersConfig.Builder();
for (String cluster : clusters) {
var searchCluster = new QrSearchersConfig.Searchcluster.Builder();
searchCluster.name(cluster);
b.searchcluster(searchCluster);
}
return b.build();
}
private static VipStatus createVipStatus(String[] clusters,
StateMonitor.Status startState,
boolean initiallyInRotation,
ClustersStatus clustersStatus,
Metric metric) {
return createVipStatus(clusters, initiallyInRotation, clustersStatus, createStateMonitor(startState), metric);
}
private static VipStatus createVipStatus(String[] clusters,
boolean initiallyInRotation,
ClustersStatus clustersStatus,
StateMonitor stateMonitor,
Metric metric) {
return new VipStatus(createSearchersConfig(clusters),
new VipStatusConfig.Builder().initiallyInRotation(initiallyInRotation).build(),
clustersStatus,
stateMonitor,
metric);
}
private static StateMonitor createStateMonitor(StateMonitor.Status startState) {
StateMonitor stateMonitor = StateMonitor.createForTesting();
stateMonitor.status(startState);
return stateMonitor;
}
private static void removeFromRotation(String[] clusters, VipStatus v) {
for (String s : clusters)
v.removeFromRotation(s);
}
private static void addToRotation(String[] clusters, VipStatus v) {
for (String s : clusters)
v.addToRotation(s);
}
private static void verifyStatus(String[] clusters, StateMonitor.Status status) {
VipStatus v = createVipStatus(clusters, status, true, new ClustersStatus(), new MetricMock());
removeFromRotation(clusters, v);
// initial state
assertFalse(v.isInRotation());
v.addToRotation(clusters[0]);
assertFalse(v.isInRotation());
v.addToRotation(clusters[1]);
assertFalse(v.isInRotation());
v.addToRotation(clusters[2]);
assertTrue(v.isInRotation());
}
private static class MetricMock implements Metric {
int inRotation = 0;
@Override
public void add(String key, Number val, Context ctx) {
throw new RuntimeException("Metric.add called unexpectedly");
}
@Override
public void set(String key, Number val, Context ctx) {
if ( ! key.equals("in_service"))
throw new RuntimeException("Metric.set called with unexpected key " + key);
inRotation = val.intValue();
}
@Override
public Context createContext(Map<String, ?> properties) { return new EmptyContext(); }
private static class EmptyContext implements Context {}
}
}
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