/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.apache.hadoop.corona;
/**
* Describes the locality of scheduling.
*/
public enum LocalityLevel {
/** Same node */
NODE (0),
/** Same rack */
RACK (1),
/** No locality specified */
ANY (2);
/** Locality level */
private final int levelNumber;
/**
* Construct a locality level with an associated level number
*
* @param levelNumber Level of this locaility
*/
private LocalityLevel(int levelNumber) {
this.levelNumber = levelNumber;
}
/**
* Simple comparator of locality levels based on the internal level number.
*
* @param other Other locality level to compare to
* @return True if other has a higher level number, false otherwise
*/
public boolean isBetterThan(LocalityLevel other) {
return this.levelNumber < other.levelNumber;
}
}