1 /**
2 *
3 * Copyright 2003-2004 The Apache Software Foundation
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * 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.geronimo.management.stats;
18
19 import java.io.Serializable;
20 import java.util.HashMap;
21 import java.util.Map;
22 import javax.management.j2ee.statistics.Statistic;
23 import javax.management.j2ee.statistics.Stats;
24
25 /**
26 * Geronimo implementation of the JSR-77 Stats interface. Dynamically tracks
27 * available statistics for its subclasses, to make it easy to iterate
28 * available statistics without knowing exactly what kind of class you're
29 * looking at. Not sure when you'd want to do that, but hey.
30 *
31 * @version $Rev: 392847 $ $Date: 2006-04-09 15:58:39 -0700 (Sun, 09 Apr 2006) $
32 */
33 public class StatsImpl implements Stats, Serializable {
34 private final Map stats = new HashMap();
35
36 public StatsImpl() {
37 }
38
39 protected void addStat(String name, Statistic value) {
40 stats.put(name, value);
41 }
42
43 /**
44 * Used when the available statistics are dynamic (e.g. depend on the
45 * current clients of the service, etc.).
46 *
47 * @param name The statistic to remove
48 */
49 protected void removeStat(String name) {
50 stats.remove(name);
51 }
52
53 public Statistic getStatistic(String statisticName) {
54 return (Statistic)stats.get(statisticName);
55 }
56
57 public String[] getStatisticNames() {
58 return (String[]) stats.keySet().toArray(new String[stats.size()]);
59 }
60
61 public Statistic[] getStatistics() {
62 String[] names = getStatisticNames();
63 Statistic[] result = new Statistic[names.length];
64 for (int i = 0; i < names.length; i++) {
65 result[i] = (Statistic) stats.get(names[i]);
66 }
67 return result;
68 }
69 }