content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.activemq.management;
  
  import java.util.Collection;
  import java.util.Set;
  import java.util.concurrent.CopyOnWriteArraySet;
  /**
   * A thread-safe class for a Stats implementation
   */
  public class StatsImpl extends StatisticImpl implements Stats, Resettable {
      //use a Set instead of a Map - to conserve Space
      protected final Set<StatisticImpl> set;
  
      public StatsImpl() {
          this(new CopyOnWriteArraySet<StatisticImpl>());
      }
  
      public StatsImpl(Set<StatisticImpl> set) {
          super("stats", "many", "Used only as container, not Statistic");
          this.set = set;
      }
  
      public synchronized void reset() {
          this.set.stream()
              .filter(Resettable.class::isInstance)
              .map(Resettable.class::cast)
              .forEach(resetStat -> resetStat.reset());
      }
  
      public synchronized Statistic getStatistic(String name) {
          return this.set.stream().filter(s -> s.getName().equals(name)).findFirst().orElse(null);
      }
  
      public synchronized String[] getStatisticNames() {
          return this.set.stream().map(StatisticImpl::getName).toArray(String[]::new);
      }
  
      public synchronized Statistic[] getStatistics() {
          return this.set.toArray(new Statistic[this.set.size()]);
      }
  
      @Deprecated(forRemoval = true, since = "6.2.0")
      protected synchronized void addStatistic(String name, StatisticImpl statistic) {
          this.set.add(statistic);
      }
  
      protected void addStatistics(Collection<StatisticImpl> statistics) {
          this.set.addAll(statistics);
      }
  
      protected void removeStatistics(Collection<StatisticImpl> statistics) {
          this.set.removeAll(statistics); 
      }
  }
  