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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.provision;
import com.yahoo.component.Version;
import com.yahoo.component.Vtag;
import java.util.Objects;
import java.util.Optional;
/**
* A specification of a cluster - or group in a grouped cluster - to be run on a set of hosts.
* This is a value object.
*
* @author bratseth
*/
public final class ClusterSpec {
private final Type type;
private final Id id;
/** The group id of these hosts, or empty if this is represents a request for hosts */
private final Optional<Group> groupId;
private final Version vespaVersion;
private ClusterSpec(Type type, Id id, Optional<Group> groupId, Version vespaVersion) {
this.type = type;
this.id = id;
this.groupId = groupId;
this.vespaVersion = vespaVersion;
}
/** Returns the cluster type */
public Type type() { return type; }
/** Returns the cluster id */
public Id id() { return id; }
public Version vespaVersion() { return vespaVersion; }
public String dockerImage() {
return DockerImage.defaultImage.withTag(vespaVersion).toString();
}
/** Returns the group within the cluster this specifies, or empty to specify the whole cluster */
public Optional<Group> group() { return groupId; }
public ClusterSpec changeGroup(Optional<Group> newGroup) { return new ClusterSpec(type, id, newGroup, vespaVersion); }
/** Create a specification <b>requesting</b> a cluster with these attributes */
@Deprecated
// TODO: April 2017 - Remove this when no version older than 6.94 is used anywhere
public static ClusterSpec request(Type type, Id id, Optional<String> dockerImage) {
return requestVersion(type, id, dockerImage.map(DockerImage::new).map(DockerImage::tagAsVersion));
}
/** Create a specification <b>requesting</b> a cluster with these attributes */
// TODO: April 2017 - Remove this when no version older than 6.97 is used anywhere
public static ClusterSpec requestVersion(Type type, Id id, Optional<Version> vespaVersion) {
return new ClusterSpec(type, id, Optional.empty(), vespaVersion.orElse(Vtag.currentVersion));
}
public static ClusterSpec request(Type type, Id id, Version vespaVersion) {
return new ClusterSpec(type, id, Optional.empty(), vespaVersion);
}
/** Create a specification <b>specifying</b> an existing cluster group having these attributes */
// TODO: April 2017 - Remove this when no version older than 6.97 is used anywhere
public static ClusterSpec from(Type type, Id id, Group groupId, Optional<Version> vespaVersion) {
return new ClusterSpec(type, id, Optional.of(groupId), vespaVersion.orElse(Vtag.currentVersion));
}
public static ClusterSpec from(Type type, Id id, Group groupId, Version vespaVersion) {
return new ClusterSpec(type, id, Optional.of(groupId), vespaVersion);
}
@Override
public String toString() {
return String.join(" ", type.toString(), id.toString(),
groupId.map(Group::toString).orElse(""),
vespaVersion.toString());
}
@Override
public int hashCode() { return type.hashCode() + 17 * id.hashCode() + 31 * groupId.hashCode(); }
@Override
public boolean equals(Object o) {
if (o == this) return true;
if ( ! (o instanceof ClusterSpec)) return false;
ClusterSpec other = (ClusterSpec)o;
if ( ! other.type.equals(this.type)) return false;
if ( ! other.id.equals(this.id)) return false;
if ( ! other.groupId.equals(this.groupId)) return false;
if ( ! other.vespaVersion.equals(this.vespaVersion)) return false;
return true;
}
/** Returns whether this is equal, disregarding the group value and wanted Vespa version */
public boolean equalsIgnoringGroupAndVespaVersion(Object o) {
if (o == this) return true;
if ( ! (o instanceof ClusterSpec)) return false;
ClusterSpec other = (ClusterSpec)o;
if ( ! other.type.equals(this.type)) return false;
if ( ! other.id.equals(this.id)) return false;
return true;
}
/** A cluster type */
public enum Type {
// These enum values are stored in ZooKeeper - do not change
admin,
container,
content;
public static Type from(String typeName) {
switch (typeName) {
case "admin" : return admin;
case "container" : return container;
case "content" : return content;
default: throw new IllegalArgumentException("Illegal cluster type '" + typeName + "'");
}
}
}
public static final class Id {
private final String id;
public Id(String id) {
Objects.requireNonNull(id, "Id cannot be null");
this.id = id;
}
public static Id from(String id) {
return new Id(id);
}
public String value() { return id; }
@Override
public String toString() { return "cluster '" + id + "'"; }
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
return ((Id)o).id.equals(this.id);
}
@Override
public int hashCode() {
return id.hashCode();
}
}
/** Identifier of a group within a cluster */
@SuppressWarnings("deprecation")
public static final class Group {
private final int index;
private Group(int index) {
this.index = index;
}
public static Group from(int index) { return new Group(index); }
public int index() { return index; }
@Override
public String toString() { return "group " + index; }
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
return ((Group)o).index == this.index;
}
@Override
public int hashCode() { return index; }
}
}
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