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.management;
018
019import java.util.ArrayList;
020import java.util.List;
021import java.util.Set;
022import java.util.concurrent.CopyOnWriteArraySet;
023import javax.management.j2ee.statistics.Statistic;
024import javax.management.j2ee.statistics.Stats;
025/**
026 * Base class for a Stats implementation
027 * 
028 * 
029 */
030public class StatsImpl extends StatisticImpl implements Stats, Resettable {
031    //use a Set instead of a Map - to conserve Space
032    private Set<StatisticImpl> set;
033
034    public StatsImpl() {
035        this(new CopyOnWriteArraySet<StatisticImpl>());
036    }
037
038    public StatsImpl(Set<StatisticImpl> set) {
039        super("stats", "many", "Used only as container, not Statistic");
040        this.set = set;
041    }
042
043    public void reset() {
044        Statistic[] stats = getStatistics();
045        int size = stats.length;
046        for (int i = 0; i < size; i++) {
047            Statistic stat = stats[i];
048            if (stat instanceof Resettable) {
049                Resettable r = (Resettable) stat;
050                r.reset();
051            }
052        }
053    }
054
055    public Statistic getStatistic(String name) {
056        for (StatisticImpl stat : this.set) {
057            if (stat.getName() != null && stat.getName().equals(name)) {
058                return stat;
059            }
060        }
061        return null;
062    }
063
064    public String[] getStatisticNames() {
065        List<String> names = new ArrayList<String>();
066        for (StatisticImpl stat : this.set) {
067            names.add(stat.getName());
068        }
069        String[] answer = new String[names.size()];
070        names.toArray(answer);
071        return answer;
072    }
073
074    public Statistic[] getStatistics() {
075        Statistic[] answer = new Statistic[this.set.size()];
076        set.toArray(answer);
077        return answer;
078    }
079
080    protected void addStatistic(String name, StatisticImpl statistic) {
081        this.set.add(statistic);
082    }
083}