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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.config.provision;
/**
* The possible types of nodes in the node repository
*
* @author bratseth
*/
public enum NodeType {
/** A node to be assigned to a tenant to run application workloads */
tenant(null, "Tenant node"),
/** A host of a set of (Docker) tenant nodes */
host(tenant, "Tenant docker host"),
/** Nodes running the shared proxy layer */
proxy(null, "Proxy node"),
/** A host of a (Docker) proxy node */
proxyhost(proxy, "Proxy docker host"),
/** A config server */
config(null, "Config server"),
/** A host of a (Docker) config server node */
confighost(config, "Config docker host"),
/** A controller */
controller(null, "Controller"),
/** A host of a (Docker) controller node */
controllerhost(controller, "Controller host");
private final NodeType childNodeType;
private final String description;
NodeType(NodeType childNodeType, String description) {
this.childNodeType = childNodeType;
this.description = description;
}
public boolean isDockerHost() {
return childNodeType != null;
}
public String description() {
return description;
}
/**
* @return {@link NodeType} of the node(s) that run on this host
* @throws IllegalStateException if this type is not a host
*/
public NodeType childNodeType() {
if (! isDockerHost())
throw new IllegalStateException(this + " has no children");
return childNodeType;
}
}
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