1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19
20 package org.apache.hadoop.hbase.client;
21
22
23 import org.apache.hadoop.conf.Configuration;
24 import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
25
26 import java.io.IOException;
27
28 /**
29 * We inherit the current ZooKeeperWatcher implementation to change the semantic
30 * of the close: the new close won't immediately close the connection but
31 * will have a keep alive. See {@link HConnection}.
32 * This allows to make it available with a consistent interface. The whole
33 * ZooKeeperWatcher use in HConnection will be then changed to remove the
34 * watcher part.
35 *
36 * This class is intended to be used internally by HBase classes; but not by
37 * final user code. Hence it's package protected.
38 */
39 class ZooKeeperKeepAliveConnection extends ZooKeeperWatcher{
40 ZooKeeperKeepAliveConnection(
41 Configuration conf, String descriptor,
42 ConnectionManager.HConnectionImplementation conn) throws IOException {
43 super(conf, descriptor, conn);
44 }
45
46 @Override
47 public void close() {
48 if (this.abortable != null) {
49 ((ConnectionManager.HConnectionImplementation)abortable).releaseZooKeeperWatcher(this);
50 }
51 }
52
53 void internalClose(){
54 super.close();
55 }
56 }