Autopsy  4.19.3
Graphical digital forensics platform for The Sleuth Kit and other tools.
CoordinationServiceUtils.java
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1 /*
2  * Autopsy Forensic Browser
3  *
4  * Copyright 2011-2018 Basis Technology Corp.
5  * Contact: carrier <at> sleuthkit <dot> org
6  *
7  * Licensed under the Apache License, Version 2.0 (the "License");
8  * you may not use this file except in compliance with the License.
9  * 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 package org.sleuthkit.autopsy.coordinationservice.utils;
20 
21 import java.io.IOException;
22 import org.apache.zookeeper.WatchedEvent;
23 import org.apache.zookeeper.ZooKeeper;
24 
29 public final class CoordinationServiceUtils {
30 
31  private static final int ZOOKEEPER_SESSION_TIMEOUT_MILLIS = 3000;
32  private static final int ZOOKEEPER_CONNECTION_TIMEOUT_MILLIS = 15000;
33 
43  public static boolean isZooKeeperAccessible(String hostName, String port) throws InterruptedException, IOException {
44  boolean result = false;
45  Object workerThreadWaitNotifyLock = new Object();
46  String connectString = hostName + ":" + port;
47  ZooKeeper zooKeeper = new ZooKeeper(connectString, ZOOKEEPER_SESSION_TIMEOUT_MILLIS,
48  (WatchedEvent event) -> {
49  synchronized (workerThreadWaitNotifyLock) {
50  workerThreadWaitNotifyLock.notify();
51  }
52  });
53  synchronized (workerThreadWaitNotifyLock) {
54  workerThreadWaitNotifyLock.wait(ZOOKEEPER_CONNECTION_TIMEOUT_MILLIS);
55  }
56  ZooKeeper.States state = zooKeeper.getState();
57  if (state == ZooKeeper.States.CONNECTED || state == ZooKeeper.States.CONNECTEDREADONLY) {
58  result = true;
59  }
60  zooKeeper.close();
61  return result;
62  }
63 }

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