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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.vespa.model;
import com.yahoo.cloud.config.SentinelConfig;
import com.yahoo.config.model.producer.AnyConfigProducer;
import com.yahoo.config.model.producer.TreeConfigProducer;
import java.util.Objects;
/**
* A physical host, running a set of services.
* The identity of a host is its hostname. Hosts are comparable on their host name.
*
* @author gjoranv
*/
public final class Host extends TreeConfigProducer<AnyConfigProducer> implements SentinelConfig.Producer, Comparable<Host> {
private ConfigSentinel configSentinel = null;
private final String hostname;
private final boolean runsConfigServer;
/**
* Constructs a new Host instance.
*
* @param parent parent TreeConfigProducer in the config model.
* @param hostname hostname for this host.
*/
public Host(TreeConfigProducer<? super Host> parent, String hostname) {
this(parent, hostname, false);
}
private Host(TreeConfigProducer<? super Host> parent, String hostname, boolean runsConfigServer) {
super(parent, hostname);
Objects.requireNonNull(hostname, "The host name of a host cannot be null");
this.runsConfigServer = runsConfigServer;
this.hostname = hostname;
}
public static Host createConfigServerHost(HostSystem hostSystem, String hostname) {
return new Host(hostSystem, hostname, true);
}
public static Host createHost(HostSystem hostSystem, String hostname) {
return new Host(hostSystem, hostname, false);
}
public String getHostname() {
return hostname;
}
public boolean runsConfigServer() {
return runsConfigServer;
}
/** Returns the string representation of this Host object. */
public String toString() {
return "host '" + getHostname() + "'";
}
@Override
public void getConfig(SentinelConfig.Builder builder) {
// TODO (MAJOR_RELEASE): This shouldn't really be here, but we need to make sure users can upgrade if we change sentinel to use hosts/<hostname>/sentinel instead of hosts/<hostname>
// as config id. We should probably wait for a major release
if (configSentinel != null) {
configSentinel.getConfig(builder);
}
}
public void setConfigSentinel(ConfigSentinel configSentinel) {
this.configSentinel = configSentinel;
}
@Override
public int hashCode() { return hostname.hashCode(); }
@Override
public boolean equals(Object other) {
if (other == this) return true;
if ( ! (other instanceof Host)) return false;
return ((Host)other).hostname.equals(hostname);
}
@Override
public int compareTo(Host other) {
return this.hostname.compareTo(other.hostname);
}
}
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