1 package org.apache.helix.healthcheck;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.apache.log4j.Logger;
23
24 public class AccumulateAggregationType implements AggregationType
25 {
26
27 private static final Logger logger = Logger
28 .getLogger(AccumulateAggregationType.class);
29
30 public final static String TYPE_NAME = "accumulate";
31
32 @Override
33 public String getName()
34 {
35 return TYPE_NAME;
36 }
37
38 @Override
39 public String merge(String iv, String ev, long prevTimestamp)
40 {
41 double inVal = Double.parseDouble(iv);
42 double existingVal = Double.parseDouble(ev);
43 return String.valueOf(inVal + existingVal);
44 }
45 }