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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.container.handler;
import com.google.inject.Inject;
import com.yahoo.container.QrSearchersConfig;
import com.yahoo.container.core.VipStatusConfig;
/**
* API for programmatically removing the container from VIP rotation.
*
* @author Steinar Knutsen
*/
public class VipStatus {
private final ClustersStatus clustersStatus;
/** If this is non-null, its value decides whether this container is in rotation */
private Boolean inRotationOverride;
public VipStatus() {
this(new QrSearchersConfig(new QrSearchersConfig.Builder()),
new VipStatusConfig(new VipStatusConfig.Builder()),
new ClustersStatus());
}
public VipStatus(QrSearchersConfig dispatchers) {
this(dispatchers, new VipStatusConfig(new VipStatusConfig.Builder()), new ClustersStatus());
}
public VipStatus(ClustersStatus clustersStatus) {
this.clustersStatus = clustersStatus;
}
@Inject
public VipStatus(QrSearchersConfig dispatchers, VipStatusConfig vipStatusConfig, ClustersStatus clustersStatus) {
this.clustersStatus = clustersStatus;
clustersStatus.setReceiveTrafficByDefault(vipStatusConfig.initiallyInRotation());
clustersStatus.setContainerHasClusters(! dispatchers.searchcluster().isEmpty());
}
/**
* 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) {
this.inRotationOverride = inRotation;
}
/** Note that a cluster (which influences up/down state) is up */
public void addToRotation(String clusterIdentifier) {
clustersStatus.setUp(clusterIdentifier);
}
/** Note that a cluster (which influences up/down state) is down */
public void removeFromRotation(String clusterIdentifier) {
clustersStatus.setDown(clusterIdentifier);
}
/** @deprecated Use addToRotation(String) instead */
@Deprecated
public void addToRotation(Object clusterIdentifier) {
addToRotation((String) clusterIdentifier);
}
/** @deprecated Use removeFromRotation(String) instead */
@Deprecated
public void removeFromRotation(Object clusterIdentifier) {
removeFromRotation((String) clusterIdentifier);
}
/** Returns whether this container should receive traffic at this time */
public boolean isInRotation() {
if (inRotationOverride != null) return inRotationOverride;
return clustersStatus.containerShouldReceiveTraffic();
}
}
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