1 package org.apache.helix;
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.I0Itec.zkclient.DataUpdater;
23
24 public class ZNRecordUpdater implements DataUpdater<ZNRecord>
25 {
26 final ZNRecord _record;
27
28 public ZNRecordUpdater(ZNRecord record)
29 {
30 _record = record;
31 }
32
33 @Override
34 public ZNRecord update(ZNRecord current)
35 {
36 if (current != null)
37 {
38 current.merge(_record);
39 return current;
40 }
41 return _record;
42 }
43 }