1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.activemq.usage;
18
19 import org.apache.activemq.kaha.Store;
20
21 /**
22 * Used to keep track of how much of something is being used so that a
23 * productive working set usage can be controlled. Main use case is manage
24 * memory usage.
25 *
26 * @org.apache.xbean.XBean
27 * @version $Revision: 1.3 $
28 */
29 public class TempUsage extends Usage<TempUsage> {
30
31 private Store store;
32
33 public TempUsage() {
34 super(null, null, 1.0f);
35 }
36
37 public TempUsage(String name, Store store) {
38 super(null, name, 1.0f);
39 this.store = store;
40 }
41
42 public TempUsage(TempUsage parent, String name) {
43 super(parent, name, 1.0f);
44 this.store = parent.store;
45 }
46
47 protected long retrieveUsage() {
48 if (store == null) {
49 return 0;
50 }
51 return store.size();
52 }
53
54 public Store getStore() {
55 return store;
56 }
57
58 public void setStore(Store store) {
59 this.store = store;
60 onLimitChange();
61 }
62 }
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