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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.config.provision.zone;
import com.yahoo.config.provision.Environment;
import com.yahoo.config.provision.RegionName;
import java.util.Objects;
/**
* Unique identifier for a Zone; use when referencing them.
* <p>
* Serialised form is 'environment.region'.
*
* @author jonmv
*/
public class ZoneId {
private static final ZoneId CONTROLLER = from(Environment.prod, RegionName.from("controller"));
/**
* The ZoneId associated with the controller, distinct from all other zones in the system, but a constant across systems.
*
* <p>The controller may also be associated with a real zone, i.e. with a region defining the location like
* aws-us-east-1a. Because such a zone ID is different for different systems, and may clash with a prod zone in the
* same region and system, the virtual zone ID is often used.</p>
*/
public static ZoneId ofVirtualControllerZone() { return CONTROLLER; }
private final Environment environment;
private final RegionName region;
private ZoneId(Environment environment, RegionName region) {
this.environment = Objects.requireNonNull(environment, "environment must be non-null");
this.region = Objects.requireNonNull(region, "region must be non-null");
}
public static ZoneId from(Environment environment, RegionName region) {
return new ZoneId(environment, region);
}
public static ZoneId from(String environment, String region) {
return from(Environment.from(environment), RegionName.from(region));
}
/** Create from a serialised ZoneId. Inverse of {@code ZoneId.value()}. */
public static ZoneId from(String value) {
String[] parts = value.split("\\.");
switch (parts.length) {
case 2:
return from(parts[0], parts[1]);
case 4:
// Deprecated: parts[0] == cloud, parts[1] == system
// TODO: Figure out whether this can be removed
return from(parts[2], parts[3]);
default:
throw new IllegalArgumentException("Cannot deserialize zone id '" + value + "'");
}
}
public static ZoneId defaultId() {
return new ZoneId(Environment.defaultEnvironment(), RegionName.defaultName());
}
public Environment environment() {
return environment;
}
public RegionName region() {
return region;
}
/** Returns the serialised value of this. Inverse of {@code ZoneId.from(String value)}. */
public String value() {
return environment + "." + region;
}
@Override
public String toString() {
return value();
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ZoneId zoneId = (ZoneId) o;
return environment == zoneId.environment &&
Objects.equals(region, zoneId.region);
}
@Override
public int hashCode() {
return Objects.hash(environment, region);
}
}
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