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 time statistic implementation
   *
   * 
   */
  public class TimeStatisticImpl extends StatisticImpl {
      private long count;
      private long maxTime;
      private long minTime;
      private long totalTime;
      private TimeStatisticImpl parent;
  
      public TimeStatisticImpl(String name, String description) {
          this(name, "millis", description);
      }
  
      public TimeStatisticImpl(TimeStatisticImpl parent, String name, String description) {
          this(name, description);
          this.parent = parent;
      }
  
      public TimeStatisticImpl(String name, String unit, String description) {
          super(name, unit, description);
      }
  
      public synchronized void reset() {
          if(isDoReset()) {
              super.reset();
              count = 0;
              maxTime = 0;
              minTime = 0;
              totalTime = 0;
          }
      }
  
      public synchronized long getCount() {
          return count;
      }
  
      public synchronized void addTime(long time) {
          count++;
          totalTime += time;
          if (time > maxTime) {
              maxTime = time;
          }
          if (time < minTime || minTime == 0) {
              minTime = time;
          }
          updateSampleTime();
          if (parent != null) {
              parent.addTime(time);
          }
      }
  
      /**
       * @return the maximum time of any step
       */
      public long getMaxTime() {
          return maxTime;
      }
  
      /**
       * @return the minimum time of any step
       */
      public synchronized long getMinTime() {
          return minTime;
      }
  
      /**
       * @return the total time of all the steps added together
       */
      public synchronized long getTotalTime() {
          return totalTime;
      }
  
      /**
       * @return the average time calculated by dividing the
       *         total time by the number of counts
       */
      public synchronized double getAverageTime() {
          if (count == 0) {
              return 0;
          }
          double d = totalTime;
          return d / count;
      }
  
  
      /**
       * @return the average time calculated by dividing the
       *         total time by the number of counts but excluding the
       *         minimum and maximum times.
       */
      public synchronized double getAverageTimeExcludingMinMax() {
          if (count <= 2) {
              return 0;
          }
          double d = totalTime - minTime - maxTime;
          return d / (count - 2);
      }
  
  
      /**
       * @return the average number of steps per second
       */
      public double getAveragePerSecond() {
          double d = 1000;
          double averageTime = getAverageTime();
          if (averageTime == 0) {
              return 0;
          }
          return d / averageTime;
      }
  
      /**
       * @return the average number of steps per second excluding the min & max values
       */
      public double getAveragePerSecondExcludingMinMax() {
          double d = 1000;
          double average = getAverageTimeExcludingMinMax();
          if (average == 0) {
              return 0;
          }
          return d / average;
      }
  
      public TimeStatisticImpl getParent() {
          return parent;
      }
  
      public void setParent(TimeStatisticImpl parent) {
          this.parent = parent;
      }
  
      protected synchronized void appendFieldDescription(StringBuffer buffer) {
          buffer.append(" count: ");
          buffer.append(Long.toString(count));
          buffer.append(" maxTime: ");
          buffer.append(Long.toString(maxTime));
          buffer.append(" minTime: ");
          buffer.append(Long.toString(minTime));
          buffer.append(" totalTime: ");
          buffer.append(Long.toString(totalTime));
          buffer.append(" averageTime: ");
          buffer.append(Double.toString(getAverageTime()));
          buffer.append(" averageTimeExMinMax: ");
          buffer.append(Double.toString(getAverageTimeExcludingMinMax()));
          buffer.append(" averagePerSecond: ");
          buffer.append(Double.toString(getAveragePerSecond()));
          buffer.append(" averagePerSecondExMinMax: ");
          buffer.append(Double.toString(getAveragePerSecondExcludingMinMax()));
          super.appendFieldDescription(buffer);
      }
  
  }
  