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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.zookeeper;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.concurrent.TimeUnit;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.ZooKeeperConnectionException;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.util.Threads;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.zookeeper.ZooKeeper;</span> |
| <span class="source-line-no">026</span><span id="line-26"></span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hbase.thirdparty.com.google.common.base.Stopwatch;</span> |
| <span class="source-line-no">028</span><span id="line-28"></span> |
| <span class="source-line-no">029</span><span id="line-29">/**</span> |
| <span class="source-line-no">030</span><span id="line-30"> * Methods that help working with ZooKeeper</span> |
| <span class="source-line-no">031</span><span id="line-31"> */</span> |
| <span class="source-line-no">032</span><span id="line-32">@InterfaceAudience.Private</span> |
| <span class="source-line-no">033</span><span id="line-33">public final class ZooKeeperHelper {</span> |
| <span class="source-line-no">034</span><span id="line-34"> // This class cannot be instantiated</span> |
| <span class="source-line-no">035</span><span id="line-35"> private ZooKeeperHelper() {</span> |
| <span class="source-line-no">036</span><span id="line-36"> }</span> |
| <span class="source-line-no">037</span><span id="line-37"></span> |
| <span class="source-line-no">038</span><span id="line-38"> /**</span> |
| <span class="source-line-no">039</span><span id="line-39"> * Get a ZooKeeper instance and wait until it connected before returning.</span> |
| <span class="source-line-no">040</span><span id="line-40"> * @param sessionTimeoutMs Used as session timeout passed to the created ZooKeeper AND as the</span> |
| <span class="source-line-no">041</span><span id="line-41"> * timeout to wait on connection establishment.</span> |
| <span class="source-line-no">042</span><span id="line-42"> */</span> |
| <span class="source-line-no">043</span><span id="line-43"> public static ZooKeeper getConnectedZooKeeper(String connectString, int sessionTimeoutMs)</span> |
| <span class="source-line-no">044</span><span id="line-44"> throws IOException {</span> |
| <span class="source-line-no">045</span><span id="line-45"> ZooKeeper zookeeper = new ZooKeeper(connectString, sessionTimeoutMs, e -> {</span> |
| <span class="source-line-no">046</span><span id="line-46"> });</span> |
| <span class="source-line-no">047</span><span id="line-47"> return ensureConnectedZooKeeper(zookeeper, sessionTimeoutMs);</span> |
| <span class="source-line-no">048</span><span id="line-48"> }</span> |
| <span class="source-line-no">049</span><span id="line-49"></span> |
| <span class="source-line-no">050</span><span id="line-50"> /**</span> |
| <span class="source-line-no">051</span><span id="line-51"> * Ensure passed zookeeper is connected.</span> |
| <span class="source-line-no">052</span><span id="line-52"> * @param timeout Time to wait on established Connection</span> |
| <span class="source-line-no">053</span><span id="line-53"> */</span> |
| <span class="source-line-no">054</span><span id="line-54"> public static ZooKeeper ensureConnectedZooKeeper(ZooKeeper zookeeper, int timeout)</span> |
| <span class="source-line-no">055</span><span id="line-55"> throws ZooKeeperConnectionException {</span> |
| <span class="source-line-no">056</span><span id="line-56"> if (zookeeper.getState().isConnected()) {</span> |
| <span class="source-line-no">057</span><span id="line-57"> return zookeeper;</span> |
| <span class="source-line-no">058</span><span id="line-58"> }</span> |
| <span class="source-line-no">059</span><span id="line-59"> Stopwatch stopWatch = Stopwatch.createStarted();</span> |
| <span class="source-line-no">060</span><span id="line-60"> // Make sure we are connected before we hand it back.</span> |
| <span class="source-line-no">061</span><span id="line-61"> while (!zookeeper.getState().isConnected()) {</span> |
| <span class="source-line-no">062</span><span id="line-62"> Threads.sleep(1);</span> |
| <span class="source-line-no">063</span><span id="line-63"> if (stopWatch.elapsed(TimeUnit.MILLISECONDS) > timeout) {</span> |
| <span class="source-line-no">064</span><span id="line-64"> throw new ZooKeeperConnectionException("Failed connect after waiting "</span> |
| <span class="source-line-no">065</span><span id="line-65"> + stopWatch.elapsed(TimeUnit.MILLISECONDS) + "ms (zk session timeout); " + zookeeper);</span> |
| <span class="source-line-no">066</span><span id="line-66"> }</span> |
| <span class="source-line-no">067</span><span id="line-67"> }</span> |
| <span class="source-line-no">068</span><span id="line-68"> return zookeeper;</span> |
| <span class="source-line-no">069</span><span id="line-69"> }</span> |
| <span class="source-line-no">070</span><span id="line-70">}</span> |
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