/**
* 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.ambari.tools.zk;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static org.apache.zookeeper.Watcher.Event.KeeperState.SyncConnected;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
/**
* I can open connections to ZooKeeper
*/
public class ZkConnection {
/**
* Opens a connection to zookeeper and waits until the connection established
*/
public static ZooKeeper open(String serverAddress, int sessionTimeoutMillis, int connectionTimeoutMillis)
throws IOException, InterruptedException, IllegalStateException
{
final CountDownLatch connSignal = new CountDownLatch(1);
ZooKeeper zooKeeper = new ZooKeeper(serverAddress, sessionTimeoutMillis, new Watcher() {
public void process(WatchedEvent event) {
if (event.getState() == SyncConnected) {
connSignal.countDown();
}
}
});
connSignal.await(connectionTimeoutMillis, MILLISECONDS);
return zooKeeper;
}
}