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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.handler;
import com.google.inject.Inject;
import com.yahoo.container.QrSearchersConfig;
import com.yahoo.container.core.VipStatusConfig;
import com.yahoo.container.jdisc.state.StateMonitor;
/**
* A component which keeps track of whether or not this container instance should receive traffic
* and respond that it is in good health.
*
* This is multithread safe.
*
* @author Steinar Knutsen
* @author bratseth
*/
public class VipStatus {
private final ClustersStatus clustersStatus;
private final StateMonitor healthState;
/** If this is non-null, its value decides whether this container is in rotation */
private Boolean rotationOverride = null;
/** The current state of this */
private boolean currentlyInRotation;
private final Object mutex = new Object();
/** For testing */
public VipStatus() {
this(new ClustersStatus());
}
/** For testing */
public VipStatus(QrSearchersConfig dispatchers) {
this(dispatchers, new ClustersStatus());
}
/** For testing */
public VipStatus(ClustersStatus clustersStatus) {
this(new QrSearchersConfig.Builder().build(), clustersStatus);
}
public VipStatus(QrSearchersConfig dispatchers, ClustersStatus clustersStatus) {
this(dispatchers, clustersStatus, new StateMonitor());
}
@Inject
public VipStatus(QrSearchersConfig dispatchers, ClustersStatus clustersStatus, StateMonitor healthState) {
this.clustersStatus = clustersStatus;
this.healthState = healthState;
healthState.status(StateMonitor.Status.initializing);
clustersStatus.setContainerHasClusters(! dispatchers.searchcluster().isEmpty());
updateCurrentlyInRotation();
}
/** @deprecated don't pass VipStatusConfig */
@Deprecated // TODO: Remove on Vespa 8
public VipStatus(QrSearchersConfig dispatchers, VipStatusConfig ignored, ClustersStatus clustersStatus) {
this(dispatchers, clustersStatus);
}
/**
* Explicitly set this container in or out of rotation
*
* @param inRotation true to set this in rotation regardless of any clusters and of the default value,
* false to set it out, and null to make this decision using the usual cluster-dependent logic
*/
public void setInRotation(Boolean inRotation) {
synchronized (mutex) {
rotationOverride = inRotation;
updateCurrentlyInRotation();
}
}
/** Note that a cluster (which influences up/down state) is up */
public void addToRotation(String clusterIdentifier) {
clustersStatus.setUp(clusterIdentifier);
updateCurrentlyInRotation();
}
/** Note that a cluster (which influences up/down state) is down */
public void removeFromRotation(String clusterIdentifier) {
clustersStatus.setDown(clusterIdentifier);
updateCurrentlyInRotation();
}
/** @deprecated use addToRotation(String) instead */
@Deprecated // TODO: Remove on Vespa 8
public void addToRotation(Object clusterIdentifier) {
addToRotation((String) clusterIdentifier);
}
/** @deprecated use removeFromRotation(String) instead */
@Deprecated // TODO: Remove on Vespa 8
public void removeFromRotation(Object clusterIdentifier) {
removeFromRotation((String) clusterIdentifier);
}
private void updateCurrentlyInRotation() {
synchronized (mutex) {
if (rotationOverride != null)
currentlyInRotation = rotationOverride;
else
currentlyInRotation = clustersStatus.containerShouldReceiveTraffic();
// Change to/from 'up' when appropriate but don't change 'initializing' to 'down'
if (currentlyInRotation)
healthState.status(StateMonitor.Status.up);
else if (healthState.status() == StateMonitor.Status.up)
healthState.status(StateMonitor.Status.down);
}
}
/** Returns whether this container should receive traffic at this time */
public boolean isInRotation() {
return currentlyInRotation;
}
}
|
