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 java.util.Collection;
  
  import com.alibaba.jstorm.common.metric.old.operator.StartTime;
  
  public class TpsMerger implements Merger<Double> {
      private static final long serialVersionUID = -4534840881635955942L;
      protected final long createTime;
  
      public TpsMerger() {
          createTime = System.currentTimeMillis();
      }
  
      public long getRunMillis(Object... args) {
          long startTime = createTime;
  
          if (args != null) {
              if (args[0] != null && args[0] instanceof StartTime) {
                  StartTime rollingWindow = (StartTime) args[0];
  
                  startTime = rollingWindow.getStartTime();
              }
          }
  
          return (System.currentTimeMillis() - startTime);
      }
  
      @Override
      public Double merge(Collection<Double> objs, Double unflushed, Object... others) {
          // TODO Auto-generated method stub
          double sum = 0.0d;
          if (unflushed != null) {
              sum += unflushed;
          }
  
          for (Double item : objs) {
              if (item != null) {
                  sum += item;
              }
          }
  
          Double ret = (sum * 1000) / getRunMillis(others);
          return ret;
      }
  
  }
  