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 */ 017 package org.apache.activemq.usage; 018 019 import org.apache.activemq.store.kahadb.plist.PListStore; 020 021 022 /** 023 * Used to keep track of how much of something is being used so that a 024 * productive working set usage can be controlled. Main use case is manage 025 * memory usage. 026 * 027 * @org.apache.xbean.XBean 028 * 029 */ 030 public class TempUsage extends Usage<TempUsage> { 031 032 private PListStore store; 033 034 public TempUsage() { 035 super(null, null, 1.0f); 036 } 037 038 public TempUsage(String name, PListStore store) { 039 super(null, name, 1.0f); 040 this.store = store; 041 } 042 043 public TempUsage(TempUsage parent, String name) { 044 super(parent, name, 1.0f); 045 this.store = parent.store; 046 } 047 048 @Override 049 protected long retrieveUsage() { 050 if (store == null) { 051 return 0; 052 } 053 return store.size(); 054 } 055 056 public PListStore getStore() { 057 return store; 058 } 059 060 public void setStore(PListStore store) { 061 this.store = store; 062 onLimitChange(); 063 } 064 }