001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.activemq.usage; 018 019 020public abstract class PercentLimitUsage <T extends Usage> extends Usage<T> { 021 022 protected int percentLimit = 0; 023 024 /** 025 * @param parent 026 * @param name 027 * @param portion 028 */ 029 public PercentLimitUsage(T parent, String name, float portion) { 030 super(parent, name, portion); 031 } 032 033 public void setPercentLimit(int percentLimit) { 034 usageLock.writeLock().lock(); 035 try { 036 this.percentLimit = percentLimit; 037 updateLimitBasedOnPercent(); 038 } finally { 039 usageLock.writeLock().unlock(); 040 } 041 } 042 043 public int getPercentLimit() { 044 usageLock.readLock().lock(); 045 try { 046 return percentLimit; 047 } finally { 048 usageLock.readLock().unlock(); 049 } 050 } 051 052 protected abstract void updateLimitBasedOnPercent(); 053}