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;
  
  
  /**
   * A range statistic implementation
   *
   * 
   */
  public class RangeStatisticImpl extends StatisticImpl {
      private long highWaterMark;
      private long lowWaterMark;
      private long current;
  
      public RangeStatisticImpl(String name, String unit, String description) {
          super(name, unit, description);
      }
  
      public void reset() {
          if (isDoReset()) {
              super.reset();
              current = 0;
              lowWaterMark = 0;
              highWaterMark = 0;
          }
      }
  
      public long getHighWaterMark() {
          return highWaterMark;
      }
  
      public long getLowWaterMark() {
          return lowWaterMark;
      }
  
      public long getCurrent() {
          return current;
      }
  
      public void setCurrent(long current) {
          this.current = current;
          if (current > highWaterMark) {
              highWaterMark = current;
          }
          if (current < lowWaterMark || lowWaterMark == 0) {
              lowWaterMark = current;
          }
          updateSampleTime();
      }
  
      protected void appendFieldDescription(StringBuffer buffer) {
          buffer.append(" current: ");
          buffer.append(Long.toString(current));
          buffer.append(" lowWaterMark: ");
          buffer.append(Long.toString(lowWaterMark));
          buffer.append(" highWaterMark: ");
          buffer.append(Long.toString(highWaterMark));
          super.appendFieldDescription(buffer);
      }
  }
  