/**
* 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.mapred;
/**
* Class to hold accounting info about a queue
* such as remaining budget, spending rate and
* whether queue usage
*/
public class BudgetQueue {
String name;
volatile float budget;
volatile float spending;
volatile int used;
volatile int pending;
/**
* @param name queue name
* @param budget queue budget in credits
* @param spending queue spending rate in credits per allocation interval
* to deduct from budget
*/
public BudgetQueue(String name, float budget, float spending) {
this.name = name;
this.budget = budget;
this.spending = spending;
this.used = 0;
this.pending = 0;
}
/**
* Thread safe addition of budget
* @param newBudget budget to add
*/
public synchronized void addBudget(float newBudget) {
budget += newBudget;
}
}