/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.cluster.routing;
/**
* Routing Preference Type
*/
public enum Preference {
/**
* Route to specific shards
*/
SHARDS("_shards"),
/**
* Route to preferred nodes, if possible
*/
PREFER_NODES("_prefer_nodes"),
/**
* Route to local node, if possible
*/
LOCAL("_local"),
/**
* Route to primary shards
*/
PRIMARY("_primary"),
/**
* Route to replica shards
*/
REPLICA("_replica"),
/**
* Route to primary shards first
*/
PRIMARY_FIRST("_primary_first"),
/**
* Route to replica shards first
*/
REPLICA_FIRST("_replica_first"),
/**
* Route to the local shard only
*/
ONLY_LOCAL("_only_local"),
/**
* Route to only node with attribute
*/
ONLY_NODES("_only_nodes");
private final String type;
Preference(String type) {
this.type = type;
}
public String type() {
return type;
}
/**
* Parses the Preference Type given a string
*/
public static Preference parse(String preference) {
String preferenceType;
int colonIndex = preference.indexOf(':');
if (colonIndex == -1) {
preferenceType = preference;
} else {
preferenceType = preference.substring(0, colonIndex);
}
switch (preferenceType) {
case "_shards":
return SHARDS;
case "_prefer_nodes":
return PREFER_NODES;
case "_local":
return LOCAL;
case "_primary":
return PRIMARY;
case "_replica":
return REPLICA;
case "_primary_first":
case "_primaryFirst":
return PRIMARY_FIRST;
case "_replica_first":
case "_replicaFirst":
return REPLICA_FIRST;
case "_only_local":
case "_onlyLocal":
return ONLY_LOCAL;
case "_only_nodes":
return ONLY_NODES;
default:
throw new IllegalArgumentException("no Preference for [" + preferenceType + "]");
}
}
}