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 com.alibaba.jstorm.common.metric.old.operator.merger;
  
  import com.alibaba.jstorm.common.metric.old.Histogram;
  
  import java.util.Collection;
  
  public class AvgMerger implements Merger<Histogram.HistorgramPair> {
      private static final long serialVersionUID = -3892281208959055221L;
  
      @Override
      public Histogram.HistorgramPair merge(Collection<Histogram.HistorgramPair> objs, Histogram.HistorgramPair unflushed, Object... others) {
          // TODO Auto-generated method stub
          double sum = 0.0d;
          long times = 0l;
  
          if (unflushed != null) {
              sum = sum + unflushed.getSum();
              times = times + unflushed.getTimes();
          }
  
          for (Histogram.HistorgramPair item : objs) {
              if (item == null) {
                  continue;
              }
              sum = sum + item.getSum();
              times = times + item.getTimes();
          }
  
          return new Histogram.HistorgramPair(sum, times);
      }
  
  }
  