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;
  
  /**
   * An UnsampledStatistic<T> implementation
   */
  public class UnsampledStatisticImpl<T> extends StatisticImpl implements UnsampledStatistic<T> {
  
      private volatile T value;
      private final T defaultValue;
  
      public UnsampledStatisticImpl(String name, String unit, String description, T defaultValue) {
          super(name, unit, description, 0l, 0l);
          this.value = defaultValue;
          this.defaultValue = defaultValue;
      }
  
      @Override
      public void reset() {
          if (isDoReset()) {
              value = defaultValue;
          }
      }
  
      @Override
      protected void updateSampleTime() {}
  
      @Override
      public long getStartTime() {
          return 0l;
      }
  
      @Override
      public long getLastSampleTime() {
          return 0l;
      }
  
      @Override
      public T getValue() {
          return value;
      }
  
      @Override
      public void setValue(T value) {
          if (isEnabled()) {
              this.value = value;
          }
      }
  
      protected void appendFieldDescription(StringBuffer buffer) {
          buffer.append(" value: ");
          buffer.append(value);
          super.appendFieldDescription(buffer);
      }
  }
  