org.apache.hadoop.hbase.client.ZooKeeperKeepAliveConnection Maven / Gradle / Ivy
/**
*
* 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 org.apache.hadoop.hbase.client;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
import java.io.IOException;
/**
* We inherit the current ZooKeeperWatcher implementation to change the semantic
* of the close: the new close won't immediately close the connection but
* will have a keep alive. See {@link HConnection}.
* This allows to make it available with a consistent interface. The whole
* ZooKeeperWatcher use in HConnection will be then changed to remove the
* watcher part.
*
* This class is intended to be used internally by HBase classes; but not by
* final user code. Hence it's package protected.
*/
class ZooKeeperKeepAliveConnection extends ZooKeeperWatcher{
ZooKeeperKeepAliveConnection(
Configuration conf, String descriptor,
HConnectionManager.HConnectionImplementation conn) throws IOException {
super(conf, descriptor, conn);
}
@Override
public void close() {
if (this.abortable != null) {
((HConnectionManager.HConnectionImplementation)abortable).releaseZooKeeperWatcher(this);
}
}
void internalClose(){
super.close();
}
}