| /** |
| * 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; |
| } |
| } |