| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html lang="en"> |
| <head> |
| <title>Source code</title> |
| <link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body> |
| <div class="sourceContainer"> |
| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.zookeeper;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.util.ArrayList;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.Arrays;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.Collections;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.Deque;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.Iterator;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.LinkedList;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.List;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.stream.Collectors;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.commons.lang3.StringUtils;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.conf.Configuration;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.HConstants;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.exceptions.DeserializationException;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.util.Threads;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.zookeeper.ZKUtil.ZKUtilOp.CreateAndFailSilent;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.zookeeper.ZKUtil.ZKUtilOp.DeleteNodeFailSilent;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.zookeeper.ZKUtil.ZKUtilOp.SetData;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.zookeeper.AsyncCallback;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.zookeeper.CreateMode;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.apache.zookeeper.KeeperException;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import org.apache.zookeeper.KeeperException.NoNodeException;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.apache.zookeeper.Op;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.apache.zookeeper.ZooKeeper;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import org.apache.zookeeper.data.Stat;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>import org.apache.zookeeper.proto.CreateRequest;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>import org.apache.zookeeper.proto.DeleteRequest;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span>import org.apache.zookeeper.proto.SetDataRequest;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span>import org.slf4j.Logger;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>import org.slf4j.LoggerFactory;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span><a name="line.51"></a> |
| <span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.ReplicationProtos;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span>/**<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> * Internal HBase utility class for ZooKeeper.<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> * <p><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * Contains only static methods and constants.<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> * <p><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> * Methods all throw {@link KeeperException} if there is an unexpected zookeeper exception, so<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> * callers of these methods must handle appropriately. If ZK is required for the operation, the<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> * server will need to be aborted.<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> */<a name="line.63"></a> |
| <span class="sourceLineNo">064</span>@InterfaceAudience.Private<a name="line.64"></a> |
| <span class="sourceLineNo">065</span>public final class ZKUtil {<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> private static final Logger LOG = LoggerFactory.getLogger(ZKUtil.class);<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> private ZKUtil() {<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> }<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> //<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> // Helper methods<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> //<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> /**<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * Returns the full path of the immediate parent of the specified node.<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * @param node path to get parent of<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * @return parent of path, null if passed the root node or an invalid node<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> */<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> public static String getParent(String node) {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> int idx = node.lastIndexOf(ZNodePaths.ZNODE_PATH_SEPARATOR);<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> return idx <= 0 ? null : node.substring(0, idx);<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> }<a name="line.82"></a> |
| <span class="sourceLineNo">083</span><a name="line.83"></a> |
| <span class="sourceLineNo">084</span> /**<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> * Get the name of the current node from the specified fully-qualified path.<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> * @param path fully-qualified path<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> * @return name of the current node<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> */<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> public static String getNodeName(String path) {<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> return path.substring(path.lastIndexOf("/") + 1);<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> }<a name="line.91"></a> |
| <span class="sourceLineNo">092</span><a name="line.92"></a> |
| <span class="sourceLineNo">093</span> //<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> // Existence checks and watches<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> //<a name="line.95"></a> |
| <span class="sourceLineNo">096</span><a name="line.96"></a> |
| <span class="sourceLineNo">097</span> /**<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> * Watch the specified znode for delete/create/change events. The watcher is set whether or not<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> * the node exists. If the node already exists, the method returns true. If the node does not<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> * exist, the method returns false.<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> * @param zkw zk reference<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> * @param znode path of node to watch<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> * @return true if znode exists, false if does not exist or error<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> */<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> public static boolean watchAndCheckExists(ZKWatcher zkw, String znode) throws KeeperException {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> try {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> Stat s = zkw.getRecoverableZooKeeper().exists(znode, zkw);<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> boolean exists = s != null;<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> if (exists) {<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> LOG.debug(zkw.prefix("Set watcher on existing znode=" + znode));<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> } else {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> LOG.debug(zkw.prefix("Set watcher on znode that does not yet exist, " + znode));<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> }<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> return exists;<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> } catch (KeeperException e) {<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> LOG.warn(zkw.prefix("Unable to set watcher on znode " + znode), e);<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> zkw.keeperException(e);<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> return false;<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> } catch (InterruptedException e) {<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> LOG.warn(zkw.prefix("Unable to set watcher on znode " + znode), e);<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> zkw.interruptedException(e);<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> return false;<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> }<a name="line.125"></a> |
| <span class="sourceLineNo">126</span><a name="line.126"></a> |
| <span class="sourceLineNo">127</span> /**<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> * Watch the specified znode, but only if exists. Useful when watching for deletions. Uses<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> * .getData() (and handles NoNodeException) instead of .exists() to accomplish this, as .getData()<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> * will only set a watch if the znode exists.<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> * @param zkw zk reference<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> * @param znode path of node to watch<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> * @return true if the watch is set, false if node does not exists<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> */<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> public static boolean setWatchIfNodeExists(ZKWatcher zkw, String znode) throws KeeperException {<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> try {<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> zkw.getRecoverableZooKeeper().getData(znode, true, null);<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> return true;<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> } catch (NoNodeException e) {<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> return false;<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> } catch (InterruptedException e) {<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> LOG.warn(zkw.prefix("Unable to set watcher on znode " + znode), e);<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> zkw.interruptedException(e);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> return false;<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> }<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> }<a name="line.147"></a> |
| <span class="sourceLineNo">148</span><a name="line.148"></a> |
| <span class="sourceLineNo">149</span> /**<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> * Check if the specified node exists. Sets no watches.<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> * @param zkw zk reference<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> * @param znode path of node to watch<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> * @return version of the node if it exists, -1 if does not exist<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> */<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> public static int checkExists(ZKWatcher zkw, String znode) throws KeeperException {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> try {<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> Stat s = zkw.getRecoverableZooKeeper().exists(znode, null);<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> return s != null ? s.getVersion() : -1;<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> } catch (KeeperException e) {<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> LOG.warn(zkw.prefix("Unable to set watcher on znode (" + znode + ")"), e);<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> zkw.keeperException(e);<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> return -1;<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> } catch (InterruptedException e) {<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> LOG.warn(zkw.prefix("Unable to set watcher on znode (" + znode + ")"), e);<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> zkw.interruptedException(e);<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> return -1;<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> }<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> }<a name="line.169"></a> |
| <span class="sourceLineNo">170</span><a name="line.170"></a> |
| <span class="sourceLineNo">171</span> //<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> // Znode listings<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> //<a name="line.173"></a> |
| <span class="sourceLineNo">174</span><a name="line.174"></a> |
| <span class="sourceLineNo">175</span> /**<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> * Lists the children znodes of the specified znode. Also sets a watch on the specified znode<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> * which will capture a NodeDeleted event on the specified znode as well as NodeChildrenChanged if<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> * any children of the specified znode are created or deleted. Returns null if the specified node<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> * does not exist. Otherwise returns a list of children of the specified node. If the node exists<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> * but it has no children, an empty list will be returned.<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> * @param zkw zk reference<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> * @param znode path of node to list and watch children of<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> * @return list of children of the specified node, an empty list if the node exists but has no<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> * children, and null if the node does not exist<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> */<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> public static List<String> listChildrenAndWatchForNewChildren(ZKWatcher zkw, String znode)<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> throws KeeperException {<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> try {<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> return zkw.getRecoverableZooKeeper().getChildren(znode, zkw);<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> } catch (KeeperException.NoNodeException ke) {<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> LOG.debug(zkw.prefix("Unable to list children of znode " + znode + " "<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> + "because node does not exist (not an error)"));<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> } catch (KeeperException e) {<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> LOG.warn(zkw.prefix("Unable to list children of znode " + znode + " "), e);<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> zkw.keeperException(e);<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> } catch (InterruptedException e) {<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> LOG.warn(zkw.prefix("Unable to list children of znode " + znode + " "), e);<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> zkw.interruptedException(e);<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> }<a name="line.200"></a> |
| <span class="sourceLineNo">201</span><a name="line.201"></a> |
| <span class="sourceLineNo">202</span> return null;<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> }<a name="line.203"></a> |
| <span class="sourceLineNo">204</span><a name="line.204"></a> |
| <span class="sourceLineNo">205</span> /**<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> * List all the children of the specified znode, setting a watch for children changes and also<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> * setting a watch on every individual child in order to get the NodeCreated and NodeDeleted<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> * events.<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> * @param zkw zookeeper reference<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> * @param znode node to get children of and watch<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> * @return list of znode names, null if the node doesn't exist<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> * @throws KeeperException if a ZooKeeper operation fails<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> */<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> public static List<String> listChildrenAndWatchThem(ZKWatcher zkw, String znode)<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> throws KeeperException {<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> List<String> children = listChildrenAndWatchForNewChildren(zkw, znode);<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> if (children == null) {<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> return null;<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> }<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> for (String child : children) {<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> watchAndCheckExists(zkw, ZNodePaths.joinZNode(znode, child));<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> }<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> return children;<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> }<a name="line.224"></a> |
| <span class="sourceLineNo">225</span><a name="line.225"></a> |
| <span class="sourceLineNo">226</span> /**<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> * Lists the children of the specified znode without setting any watches. Sets no watches at all,<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> * this method is best effort. Returns an empty list if the node has no children. Returns null if<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> * the parent node itself does not exist.<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> * @param zkw zookeeper reference<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> * @param znode node to get children<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> * @return list of data of children of specified znode, empty if no children, null if parent does<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> * not exist<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> */<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> public static List<String> listChildrenNoWatch(ZKWatcher zkw, String znode)<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> throws KeeperException {<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> List<String> children = null;<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> try {<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> // List the children without watching<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> children = zkw.getRecoverableZooKeeper().getChildren(znode, null);<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> } catch (KeeperException.NoNodeException nne) {<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> return null;<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> } catch (InterruptedException ie) {<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> zkw.interruptedException(ie);<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> }<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> return children;<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> }<a name="line.248"></a> |
| <span class="sourceLineNo">249</span><a name="line.249"></a> |
| <span class="sourceLineNo">250</span> /**<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> * Simple class to hold a node path and node data.<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> * @deprecated Unused<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> */<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> @Deprecated<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> public static class NodeAndData {<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> private String node;<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> private byte[] data;<a name="line.257"></a> |
| <span class="sourceLineNo">258</span><a name="line.258"></a> |
| <span class="sourceLineNo">259</span> public NodeAndData(String node, byte[] data) {<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> this.node = node;<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> this.data = data;<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> }<a name="line.262"></a> |
| <span class="sourceLineNo">263</span><a name="line.263"></a> |
| <span class="sourceLineNo">264</span> public String getNode() {<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> return node;<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> }<a name="line.266"></a> |
| <span class="sourceLineNo">267</span><a name="line.267"></a> |
| <span class="sourceLineNo">268</span> public byte[] getData() {<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> return data;<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> }<a name="line.270"></a> |
| <span class="sourceLineNo">271</span><a name="line.271"></a> |
| <span class="sourceLineNo">272</span> @Override<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> public String toString() {<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> return node;<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> }<a name="line.275"></a> |
| <span class="sourceLineNo">276</span><a name="line.276"></a> |
| <span class="sourceLineNo">277</span> public boolean isEmpty() {<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> return (data == null || data.length == 0);<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> }<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> }<a name="line.280"></a> |
| <span class="sourceLineNo">281</span><a name="line.281"></a> |
| <span class="sourceLineNo">282</span> /**<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> * Checks if the specified znode has any children. Sets no watches. Returns true if the node<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> * exists and has children. Returns false if the node does not exist or if the node does not have<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> * any children. Used during master initialization to determine if the master is a failed-over-to<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> * master or the first master during initial cluster startup. If the directory for regionserver<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> * ephemeral nodes is empty then this is a cluster startup, if not then it is not cluster startup.<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> * @param zkw zk reference<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> * @param znode path of node to check for children of<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> * @return true if node has children, false if not or node does not exist<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> */<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> public static boolean nodeHasChildren(ZKWatcher zkw, String znode) throws KeeperException {<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> try {<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> return !zkw.getRecoverableZooKeeper().getChildren(znode, null).isEmpty();<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> } catch (KeeperException.NoNodeException ke) {<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> LOG.debug(zkw.prefix("Unable to list children of znode " + znode<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> + " because node does not exist (not an error)"));<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> return false;<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> } catch (KeeperException e) {<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> LOG.warn(zkw.prefix("Unable to list children of znode " + znode), e);<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> zkw.keeperException(e);<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> return false;<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> } catch (InterruptedException e) {<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> LOG.warn(zkw.prefix("Unable to list children of znode " + znode), e);<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> zkw.interruptedException(e);<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> return false;<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> }<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> }<a name="line.309"></a> |
| <span class="sourceLineNo">310</span><a name="line.310"></a> |
| <span class="sourceLineNo">311</span> /**<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> * Get the number of children of the specified node. If the node does not exist or has no<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> * children, returns 0. Sets no watches at all.<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> * @param zkw zk reference<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> * @param znode path of node to count children of<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> * @return number of children of specified node, 0 if none or parent does not exist<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> */<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> public static int getNumberOfChildren(ZKWatcher zkw, String znode) throws KeeperException {<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> try {<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> Stat stat = zkw.getRecoverableZooKeeper().exists(znode, null);<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> return stat == null ? 0 : stat.getNumChildren();<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> } catch (KeeperException e) {<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> LOG.warn(zkw.prefix("Unable to get children of node " + znode));<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> zkw.keeperException(e);<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> } catch (InterruptedException e) {<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> zkw.interruptedException(e);<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> }<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> return 0;<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> }<a name="line.330"></a> |
| <span class="sourceLineNo">331</span><a name="line.331"></a> |
| <span class="sourceLineNo">332</span> //<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> // Data retrieval<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> //<a name="line.334"></a> |
| <span class="sourceLineNo">335</span><a name="line.335"></a> |
| <span class="sourceLineNo">336</span> /**<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> * Get znode data. Does not set a watcher.<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> * @return ZNode data, null if the node does not exist or if there is an error.<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> */<a name="line.339"></a> |
| <span class="sourceLineNo">340</span> public static byte[] getData(ZKWatcher zkw, String znode)<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> throws KeeperException, InterruptedException {<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> try {<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> byte[] data = zkw.getRecoverableZooKeeper().getData(znode, null, null);<a name="line.343"></a> |
| <span class="sourceLineNo">344</span> logRetrievedMsg(zkw, znode, data, false);<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> return data;<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> } catch (KeeperException.NoNodeException e) {<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> LOG.debug(zkw.prefix("Unable to get data of znode " + znode + " "<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> + "because node does not exist (not an error)"));<a name="line.348"></a> |
| <span class="sourceLineNo">349</span> return null;<a name="line.349"></a> |
| <span class="sourceLineNo">350</span> } catch (KeeperException e) {<a name="line.350"></a> |
| <span class="sourceLineNo">351</span> LOG.warn(zkw.prefix("Unable to get data of znode " + znode), e);<a name="line.351"></a> |
| <span class="sourceLineNo">352</span> zkw.keeperException(e);<a name="line.352"></a> |
| <span class="sourceLineNo">353</span> return null;<a name="line.353"></a> |
| <span class="sourceLineNo">354</span> }<a name="line.354"></a> |
| <span class="sourceLineNo">355</span> }<a name="line.355"></a> |
| <span class="sourceLineNo">356</span><a name="line.356"></a> |
| <span class="sourceLineNo">357</span> /**<a name="line.357"></a> |
| <span class="sourceLineNo">358</span> * Get the data at the specified znode and set a watch. Returns the data and sets a watch if the<a name="line.358"></a> |
| <span class="sourceLineNo">359</span> * node exists. Returns null and no watch is set if the node does not exist or there is an<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> * exception.<a name="line.360"></a> |
| <span class="sourceLineNo">361</span> * @param zkw zk reference<a name="line.361"></a> |
| <span class="sourceLineNo">362</span> * @param znode path of node<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> * @return data of the specified znode, or null<a name="line.363"></a> |
| <span class="sourceLineNo">364</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.364"></a> |
| <span class="sourceLineNo">365</span> */<a name="line.365"></a> |
| <span class="sourceLineNo">366</span> public static byte[] getDataAndWatch(ZKWatcher zkw, String znode) throws KeeperException {<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> return getDataInternal(zkw, znode, null, true, true);<a name="line.367"></a> |
| <span class="sourceLineNo">368</span> }<a name="line.368"></a> |
| <span class="sourceLineNo">369</span><a name="line.369"></a> |
| <span class="sourceLineNo">370</span> /**<a name="line.370"></a> |
| <span class="sourceLineNo">371</span> * Get the data at the specified znode and set a watch. Returns the data and sets a watch if the<a name="line.371"></a> |
| <span class="sourceLineNo">372</span> * node exists. Returns null and no watch is set if the node does not exist or there is an<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> * exception.<a name="line.373"></a> |
| <span class="sourceLineNo">374</span> * @param zkw zk reference<a name="line.374"></a> |
| <span class="sourceLineNo">375</span> * @param znode path of node<a name="line.375"></a> |
| <span class="sourceLineNo">376</span> * @param throwOnInterrupt if false then just interrupt the thread, do not throw exception<a name="line.376"></a> |
| <span class="sourceLineNo">377</span> * @return data of the specified znode, or null<a name="line.377"></a> |
| <span class="sourceLineNo">378</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.378"></a> |
| <span class="sourceLineNo">379</span> */<a name="line.379"></a> |
| <span class="sourceLineNo">380</span> public static byte[] getDataAndWatch(ZKWatcher zkw, String znode, boolean throwOnInterrupt)<a name="line.380"></a> |
| <span class="sourceLineNo">381</span> throws KeeperException {<a name="line.381"></a> |
| <span class="sourceLineNo">382</span> return getDataInternal(zkw, znode, null, true, throwOnInterrupt);<a name="line.382"></a> |
| <span class="sourceLineNo">383</span> }<a name="line.383"></a> |
| <span class="sourceLineNo">384</span><a name="line.384"></a> |
| <span class="sourceLineNo">385</span> /**<a name="line.385"></a> |
| <span class="sourceLineNo">386</span> * Get the data at the specified znode and set a watch. Returns the data and sets a watch if the<a name="line.386"></a> |
| <span class="sourceLineNo">387</span> * node exists. Returns null and no watch is set if the node does not exist or there is an<a name="line.387"></a> |
| <span class="sourceLineNo">388</span> * exception.<a name="line.388"></a> |
| <span class="sourceLineNo">389</span> * @param zkw zk reference<a name="line.389"></a> |
| <span class="sourceLineNo">390</span> * @param znode path of node<a name="line.390"></a> |
| <span class="sourceLineNo">391</span> * @param stat object to populate the version of the znode<a name="line.391"></a> |
| <span class="sourceLineNo">392</span> * @return data of the specified znode, or null<a name="line.392"></a> |
| <span class="sourceLineNo">393</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.393"></a> |
| <span class="sourceLineNo">394</span> */<a name="line.394"></a> |
| <span class="sourceLineNo">395</span> public static byte[] getDataAndWatch(ZKWatcher zkw, String znode, Stat stat)<a name="line.395"></a> |
| <span class="sourceLineNo">396</span> throws KeeperException {<a name="line.396"></a> |
| <span class="sourceLineNo">397</span> return getDataInternal(zkw, znode, stat, true, true);<a name="line.397"></a> |
| <span class="sourceLineNo">398</span> }<a name="line.398"></a> |
| <span class="sourceLineNo">399</span><a name="line.399"></a> |
| <span class="sourceLineNo">400</span> private static byte[] getDataInternal(ZKWatcher zkw, String znode, Stat stat, boolean watcherSet,<a name="line.400"></a> |
| <span class="sourceLineNo">401</span> boolean throwOnInterrupt) throws KeeperException {<a name="line.401"></a> |
| <span class="sourceLineNo">402</span> try {<a name="line.402"></a> |
| <span class="sourceLineNo">403</span> byte[] data = zkw.getRecoverableZooKeeper().getData(znode, zkw, stat);<a name="line.403"></a> |
| <span class="sourceLineNo">404</span> logRetrievedMsg(zkw, znode, data, watcherSet);<a name="line.404"></a> |
| <span class="sourceLineNo">405</span> return data;<a name="line.405"></a> |
| <span class="sourceLineNo">406</span> } catch (KeeperException.NoNodeException e) {<a name="line.406"></a> |
| <span class="sourceLineNo">407</span> // This log can get pretty annoying when we cycle on 100ms waits.<a name="line.407"></a> |
| <span class="sourceLineNo">408</span> // Enable trace if you really want to see it.<a name="line.408"></a> |
| <span class="sourceLineNo">409</span> LOG.trace(zkw.prefix("Unable to get data of znode " + znode + " "<a name="line.409"></a> |
| <span class="sourceLineNo">410</span> + "because node does not exist (not an error)"));<a name="line.410"></a> |
| <span class="sourceLineNo">411</span> return null;<a name="line.411"></a> |
| <span class="sourceLineNo">412</span> } catch (KeeperException e) {<a name="line.412"></a> |
| <span class="sourceLineNo">413</span> LOG.warn(zkw.prefix("Unable to get data of znode " + znode), e);<a name="line.413"></a> |
| <span class="sourceLineNo">414</span> zkw.keeperException(e);<a name="line.414"></a> |
| <span class="sourceLineNo">415</span> return null;<a name="line.415"></a> |
| <span class="sourceLineNo">416</span> } catch (InterruptedException e) {<a name="line.416"></a> |
| <span class="sourceLineNo">417</span> LOG.warn(zkw.prefix("Unable to get data of znode " + znode), e);<a name="line.417"></a> |
| <span class="sourceLineNo">418</span> if (throwOnInterrupt) {<a name="line.418"></a> |
| <span class="sourceLineNo">419</span> zkw.interruptedException(e);<a name="line.419"></a> |
| <span class="sourceLineNo">420</span> } else {<a name="line.420"></a> |
| <span class="sourceLineNo">421</span> zkw.interruptedExceptionNoThrow(e, true);<a name="line.421"></a> |
| <span class="sourceLineNo">422</span> }<a name="line.422"></a> |
| <span class="sourceLineNo">423</span> return null;<a name="line.423"></a> |
| <span class="sourceLineNo">424</span> }<a name="line.424"></a> |
| <span class="sourceLineNo">425</span> }<a name="line.425"></a> |
| <span class="sourceLineNo">426</span><a name="line.426"></a> |
| <span class="sourceLineNo">427</span> /**<a name="line.427"></a> |
| <span class="sourceLineNo">428</span> * Get the data at the specified znode without setting a watch. Returns the data if the node<a name="line.428"></a> |
| <span class="sourceLineNo">429</span> * exists. Returns null if the node does not exist. Sets the stats of the node in the passed Stat<a name="line.429"></a> |
| <span class="sourceLineNo">430</span> * object. Pass a null stat if not interested.<a name="line.430"></a> |
| <span class="sourceLineNo">431</span> * @param zkw zk reference<a name="line.431"></a> |
| <span class="sourceLineNo">432</span> * @param znode path of node<a name="line.432"></a> |
| <span class="sourceLineNo">433</span> * @param stat node status to get if node exists<a name="line.433"></a> |
| <span class="sourceLineNo">434</span> * @return data of the specified znode, or null if node does not exist<a name="line.434"></a> |
| <span class="sourceLineNo">435</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.435"></a> |
| <span class="sourceLineNo">436</span> */<a name="line.436"></a> |
| <span class="sourceLineNo">437</span> public static byte[] getDataNoWatch(ZKWatcher zkw, String znode, Stat stat)<a name="line.437"></a> |
| <span class="sourceLineNo">438</span> throws KeeperException {<a name="line.438"></a> |
| <span class="sourceLineNo">439</span> try {<a name="line.439"></a> |
| <span class="sourceLineNo">440</span> byte[] data = zkw.getRecoverableZooKeeper().getData(znode, null, stat);<a name="line.440"></a> |
| <span class="sourceLineNo">441</span> logRetrievedMsg(zkw, znode, data, false);<a name="line.441"></a> |
| <span class="sourceLineNo">442</span> return data;<a name="line.442"></a> |
| <span class="sourceLineNo">443</span> } catch (KeeperException.NoNodeException e) {<a name="line.443"></a> |
| <span class="sourceLineNo">444</span> LOG.debug(zkw.prefix("Unable to get data of znode " + znode + " "<a name="line.444"></a> |
| <span class="sourceLineNo">445</span> + "because node does not exist (not necessarily an error)"));<a name="line.445"></a> |
| <span class="sourceLineNo">446</span> return null;<a name="line.446"></a> |
| <span class="sourceLineNo">447</span> } catch (KeeperException e) {<a name="line.447"></a> |
| <span class="sourceLineNo">448</span> LOG.warn(zkw.prefix("Unable to get data of znode " + znode), e);<a name="line.448"></a> |
| <span class="sourceLineNo">449</span> zkw.keeperException(e);<a name="line.449"></a> |
| <span class="sourceLineNo">450</span> return null;<a name="line.450"></a> |
| <span class="sourceLineNo">451</span> } catch (InterruptedException e) {<a name="line.451"></a> |
| <span class="sourceLineNo">452</span> LOG.warn(zkw.prefix("Unable to get data of znode " + znode), e);<a name="line.452"></a> |
| <span class="sourceLineNo">453</span> zkw.interruptedException(e);<a name="line.453"></a> |
| <span class="sourceLineNo">454</span> return null;<a name="line.454"></a> |
| <span class="sourceLineNo">455</span> }<a name="line.455"></a> |
| <span class="sourceLineNo">456</span> }<a name="line.456"></a> |
| <span class="sourceLineNo">457</span><a name="line.457"></a> |
| <span class="sourceLineNo">458</span> /**<a name="line.458"></a> |
| <span class="sourceLineNo">459</span> * Returns the date of child znodes of the specified znode. Also sets a watch on the specified<a name="line.459"></a> |
| <span class="sourceLineNo">460</span> * znode which will capture a NodeDeleted event on the specified znode as well as<a name="line.460"></a> |
| <span class="sourceLineNo">461</span> * NodeChildrenChanged if any children of the specified znode are created or deleted. Returns null<a name="line.461"></a> |
| <span class="sourceLineNo">462</span> * if the specified node does not exist. Otherwise returns a list of children of the specified<a name="line.462"></a> |
| <span class="sourceLineNo">463</span> * node. If the node exists but it has no children, an empty list will be returned.<a name="line.463"></a> |
| <span class="sourceLineNo">464</span> * @param zkw zk reference<a name="line.464"></a> |
| <span class="sourceLineNo">465</span> * @param baseNode path of node to list and watch children of<a name="line.465"></a> |
| <span class="sourceLineNo">466</span> * @return list of data of children of the specified node, an empty list if the node exists but<a name="line.466"></a> |
| <span class="sourceLineNo">467</span> * has no children, and null if the node does not exist<a name="line.467"></a> |
| <span class="sourceLineNo">468</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.468"></a> |
| <span class="sourceLineNo">469</span> * @deprecated Unused<a name="line.469"></a> |
| <span class="sourceLineNo">470</span> */<a name="line.470"></a> |
| <span class="sourceLineNo">471</span> @Deprecated<a name="line.471"></a> |
| <span class="sourceLineNo">472</span> public static List<NodeAndData> getChildDataAndWatchForNewChildren(ZKWatcher zkw, String baseNode)<a name="line.472"></a> |
| <span class="sourceLineNo">473</span> throws KeeperException {<a name="line.473"></a> |
| <span class="sourceLineNo">474</span> return getChildDataAndWatchForNewChildren(zkw, baseNode, true);<a name="line.474"></a> |
| <span class="sourceLineNo">475</span> }<a name="line.475"></a> |
| <span class="sourceLineNo">476</span><a name="line.476"></a> |
| <span class="sourceLineNo">477</span> /**<a name="line.477"></a> |
| <span class="sourceLineNo">478</span> * Returns the date of child znodes of the specified znode. Also sets a watch on the specified<a name="line.478"></a> |
| <span class="sourceLineNo">479</span> * znode which will capture a NodeDeleted event on the specified znode as well as<a name="line.479"></a> |
| <span class="sourceLineNo">480</span> * NodeChildrenChanged if any children of the specified znode are created or deleted. Returns null<a name="line.480"></a> |
| <span class="sourceLineNo">481</span> * if the specified node does not exist. Otherwise returns a list of children of the specified<a name="line.481"></a> |
| <span class="sourceLineNo">482</span> * node. If the node exists but it has no children, an empty list will be returned.<a name="line.482"></a> |
| <span class="sourceLineNo">483</span> * @param zkw zk reference<a name="line.483"></a> |
| <span class="sourceLineNo">484</span> * @param baseNode path of node to list and watch children of<a name="line.484"></a> |
| <span class="sourceLineNo">485</span> * @param throwOnInterrupt if true then just interrupt the thread, do not throw exception<a name="line.485"></a> |
| <span class="sourceLineNo">486</span> * @return list of data of children of the specified node, an empty list if the node exists but<a name="line.486"></a> |
| <span class="sourceLineNo">487</span> * has no children, and null if the node does not exist<a name="line.487"></a> |
| <span class="sourceLineNo">488</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.488"></a> |
| <span class="sourceLineNo">489</span> * @deprecated Unused<a name="line.489"></a> |
| <span class="sourceLineNo">490</span> */<a name="line.490"></a> |
| <span class="sourceLineNo">491</span> @Deprecated<a name="line.491"></a> |
| <span class="sourceLineNo">492</span> public static List<NodeAndData> getChildDataAndWatchForNewChildren(ZKWatcher zkw, String baseNode,<a name="line.492"></a> |
| <span class="sourceLineNo">493</span> boolean throwOnInterrupt) throws KeeperException {<a name="line.493"></a> |
| <span class="sourceLineNo">494</span> List<String> nodes = ZKUtil.listChildrenAndWatchForNewChildren(zkw, baseNode);<a name="line.494"></a> |
| <span class="sourceLineNo">495</span> if (nodes != null) {<a name="line.495"></a> |
| <span class="sourceLineNo">496</span> List<NodeAndData> newNodes = new ArrayList<>();<a name="line.496"></a> |
| <span class="sourceLineNo">497</span> for (String node : nodes) {<a name="line.497"></a> |
| <span class="sourceLineNo">498</span> if (Thread.interrupted()) {<a name="line.498"></a> |
| <span class="sourceLineNo">499</span> // Partial data should not be processed. Cancel processing by sending empty list.<a name="line.499"></a> |
| <span class="sourceLineNo">500</span> return Collections.emptyList();<a name="line.500"></a> |
| <span class="sourceLineNo">501</span> }<a name="line.501"></a> |
| <span class="sourceLineNo">502</span> String nodePath = ZNodePaths.joinZNode(baseNode, node);<a name="line.502"></a> |
| <span class="sourceLineNo">503</span> byte[] data = ZKUtil.getDataAndWatch(zkw, nodePath, throwOnInterrupt);<a name="line.503"></a> |
| <span class="sourceLineNo">504</span> newNodes.add(new NodeAndData(nodePath, data));<a name="line.504"></a> |
| <span class="sourceLineNo">505</span> }<a name="line.505"></a> |
| <span class="sourceLineNo">506</span> return newNodes;<a name="line.506"></a> |
| <span class="sourceLineNo">507</span> }<a name="line.507"></a> |
| <span class="sourceLineNo">508</span> return null;<a name="line.508"></a> |
| <span class="sourceLineNo">509</span> }<a name="line.509"></a> |
| <span class="sourceLineNo">510</span><a name="line.510"></a> |
| <span class="sourceLineNo">511</span> /**<a name="line.511"></a> |
| <span class="sourceLineNo">512</span> * Update the data of an existing node with the expected version to have the specified data.<a name="line.512"></a> |
| <span class="sourceLineNo">513</span> * Throws an exception if there is a version mismatch or some other problem. Sets no watches under<a name="line.513"></a> |
| <span class="sourceLineNo">514</span> * any conditions.<a name="line.514"></a> |
| <span class="sourceLineNo">515</span> * @param zkw zk reference<a name="line.515"></a> |
| <span class="sourceLineNo">516</span> * @param znode the path to the ZNode<a name="line.516"></a> |
| <span class="sourceLineNo">517</span> * @param data the data to store in ZooKeeper<a name="line.517"></a> |
| <span class="sourceLineNo">518</span> * @param expectedVersion the expected version<a name="line.518"></a> |
| <span class="sourceLineNo">519</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.519"></a> |
| <span class="sourceLineNo">520</span> * @throws KeeperException.BadVersionException if version mismatch<a name="line.520"></a> |
| <span class="sourceLineNo">521</span> * @deprecated Unused<a name="line.521"></a> |
| <span class="sourceLineNo">522</span> */<a name="line.522"></a> |
| <span class="sourceLineNo">523</span> @Deprecated<a name="line.523"></a> |
| <span class="sourceLineNo">524</span> public static void updateExistingNodeData(ZKWatcher zkw, String znode, byte[] data,<a name="line.524"></a> |
| <span class="sourceLineNo">525</span> int expectedVersion) throws KeeperException {<a name="line.525"></a> |
| <span class="sourceLineNo">526</span> try {<a name="line.526"></a> |
| <span class="sourceLineNo">527</span> zkw.getRecoverableZooKeeper().setData(znode, data, expectedVersion);<a name="line.527"></a> |
| <span class="sourceLineNo">528</span> } catch (InterruptedException ie) {<a name="line.528"></a> |
| <span class="sourceLineNo">529</span> zkw.interruptedException(ie);<a name="line.529"></a> |
| <span class="sourceLineNo">530</span> }<a name="line.530"></a> |
| <span class="sourceLineNo">531</span> }<a name="line.531"></a> |
| <span class="sourceLineNo">532</span><a name="line.532"></a> |
| <span class="sourceLineNo">533</span> //<a name="line.533"></a> |
| <span class="sourceLineNo">534</span> // Data setting<a name="line.534"></a> |
| <span class="sourceLineNo">535</span> //<a name="line.535"></a> |
| <span class="sourceLineNo">536</span><a name="line.536"></a> |
| <span class="sourceLineNo">537</span> /**<a name="line.537"></a> |
| <span class="sourceLineNo">538</span> * Sets the data of the existing znode to be the specified data. Ensures that the current data has<a name="line.538"></a> |
| <span class="sourceLineNo">539</span> * the specified expected version.<a name="line.539"></a> |
| <span class="sourceLineNo">540</span> * <p><a name="line.540"></a> |
| <span class="sourceLineNo">541</span> * If the node does not exist, a {@link NoNodeException} will be thrown.<a name="line.541"></a> |
| <span class="sourceLineNo">542</span> * <p><a name="line.542"></a> |
| <span class="sourceLineNo">543</span> * If their is a version mismatch, method returns null.<a name="line.543"></a> |
| <span class="sourceLineNo">544</span> * <p><a name="line.544"></a> |
| <span class="sourceLineNo">545</span> * No watches are set but setting data will trigger other watchers of this node.<a name="line.545"></a> |
| <span class="sourceLineNo">546</span> * <p><a name="line.546"></a> |
| <span class="sourceLineNo">547</span> * If there is another problem, a KeeperException will be thrown.<a name="line.547"></a> |
| <span class="sourceLineNo">548</span> * @param zkw zk reference<a name="line.548"></a> |
| <span class="sourceLineNo">549</span> * @param znode path of node<a name="line.549"></a> |
| <span class="sourceLineNo">550</span> * @param data data to set for node<a name="line.550"></a> |
| <span class="sourceLineNo">551</span> * @param expectedVersion version expected when setting data<a name="line.551"></a> |
| <span class="sourceLineNo">552</span> * @return true if data set, false if version mismatch<a name="line.552"></a> |
| <span class="sourceLineNo">553</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.553"></a> |
| <span class="sourceLineNo">554</span> */<a name="line.554"></a> |
| <span class="sourceLineNo">555</span> public static boolean setData(ZKWatcher zkw, String znode, byte[] data, int expectedVersion)<a name="line.555"></a> |
| <span class="sourceLineNo">556</span> throws KeeperException, KeeperException.NoNodeException {<a name="line.556"></a> |
| <span class="sourceLineNo">557</span> try {<a name="line.557"></a> |
| <span class="sourceLineNo">558</span> return zkw.getRecoverableZooKeeper().setData(znode, data, expectedVersion) != null;<a name="line.558"></a> |
| <span class="sourceLineNo">559</span> } catch (InterruptedException e) {<a name="line.559"></a> |
| <span class="sourceLineNo">560</span> zkw.interruptedException(e);<a name="line.560"></a> |
| <span class="sourceLineNo">561</span> return false;<a name="line.561"></a> |
| <span class="sourceLineNo">562</span> }<a name="line.562"></a> |
| <span class="sourceLineNo">563</span> }<a name="line.563"></a> |
| <span class="sourceLineNo">564</span><a name="line.564"></a> |
| <span class="sourceLineNo">565</span> /**<a name="line.565"></a> |
| <span class="sourceLineNo">566</span> * Set data into node creating node if it doesn't yet exist. Does not set watch.<a name="line.566"></a> |
| <span class="sourceLineNo">567</span> * @param zkw zk reference<a name="line.567"></a> |
| <span class="sourceLineNo">568</span> * @param znode path of node<a name="line.568"></a> |
| <span class="sourceLineNo">569</span> * @param data data to set for node<a name="line.569"></a> |
| <span class="sourceLineNo">570</span> * @throws KeeperException if a ZooKeeper operation fails<a name="line.570"></a> |
| <span class="sourceLineNo">571</span> */<a name="line.571"></a> |
| <span class="sourceLineNo">572</span> public static void createSetData(final ZKWatcher zkw, final String znode, final byte[] data)<a name="line.572"></a> |
| <span class="sourceLineNo">573</span> throws KeeperException {<a name="line.573"></a> |
| <span class="sourceLineNo">574</span> if (checkExists(zkw, znode) == -1) {<a name="line.574"></a> |
| <span class="sourceLineNo">575</span> ZKUtil.createWithParents(zkw, znode, data);<a name="line.575"></a> |
| <span class="sourceLineNo">576</span> } else {<a name="line.576"></a> |
| <span class="sourceLineNo">577</span> ZKUtil.setData(zkw, znode, data);<a name="line.577"></a> |
| <span class="sourceLineNo">578</span> }<a name="line.578"></a> |
| <span class="sourceLineNo">579</span> }<a name="line.579"></a> |
| <span class="sourceLineNo">580</span><a name="line.580"></a> |
| <span class="sourceLineNo">581</span> /**<a name="line.581"></a> |
| <span class="sourceLineNo">582</span> * Sets the data of the existing znode to be the specified data. The node must exist but no checks<a name="line.582"></a> |
| <span class="sourceLineNo">583</span> * are done on the existing data or version.<a name="line.583"></a> |
| <span class="sourceLineNo">584</span> * <p><a name="line.584"></a> |
| <span class="sourceLineNo">585</span> * If the node does not exist, a {@link NoNodeException} will be thrown.<a name="line.585"></a> |
| <span class="sourceLineNo">586</span> * <p><a name="line.586"></a> |
| <span class="sourceLineNo">587</span> * No watches are set but setting data will trigger other watchers of this node.<a name="line.587"></a> |
| <span class="sourceLineNo">588</span> * <p><a name="line.588"></a> |
| <span class="sourceLineNo">589</span> * If there is another problem, a KeeperException will be thrown.<a name="line.589"></a> |
| <span class="sourceLineNo">590</span> * @param zkw zk reference<a name="line.590"></a> |
| <span class="sourceLineNo">591</span> * @param znode path of node<a name="line.591"></a> |
| <span class="sourceLineNo">592</span> * @param data data to set for node<a name="line.592"></a> |
| <span class="sourceLineNo">593</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.593"></a> |
| <span class="sourceLineNo">594</span> */<a name="line.594"></a> |
| <span class="sourceLineNo">595</span> public static void setData(ZKWatcher zkw, String znode, byte[] data)<a name="line.595"></a> |
| <span class="sourceLineNo">596</span> throws KeeperException, KeeperException.NoNodeException {<a name="line.596"></a> |
| <span class="sourceLineNo">597</span> setData(zkw, (SetData) ZKUtilOp.setData(znode, data));<a name="line.597"></a> |
| <span class="sourceLineNo">598</span> }<a name="line.598"></a> |
| <span class="sourceLineNo">599</span><a name="line.599"></a> |
| <span class="sourceLineNo">600</span> private static void setData(ZKWatcher zkw, SetData setData)<a name="line.600"></a> |
| <span class="sourceLineNo">601</span> throws KeeperException, KeeperException.NoNodeException {<a name="line.601"></a> |
| <span class="sourceLineNo">602</span> SetDataRequest sd = (SetDataRequest) toZooKeeperOp(zkw, setData).toRequestRecord();<a name="line.602"></a> |
| <span class="sourceLineNo">603</span> setData(zkw, sd.getPath(), sd.getData(), sd.getVersion());<a name="line.603"></a> |
| <span class="sourceLineNo">604</span> }<a name="line.604"></a> |
| <span class="sourceLineNo">605</span><a name="line.605"></a> |
| <span class="sourceLineNo">606</span> //<a name="line.606"></a> |
| <span class="sourceLineNo">607</span> // Node creation<a name="line.607"></a> |
| <span class="sourceLineNo">608</span> //<a name="line.608"></a> |
| <span class="sourceLineNo">609</span><a name="line.609"></a> |
| <span class="sourceLineNo">610</span> /**<a name="line.610"></a> |
| <span class="sourceLineNo">611</span> * Set the specified znode to be an ephemeral node carrying the specified data. If the node is<a name="line.611"></a> |
| <span class="sourceLineNo">612</span> * created successfully, a watcher is also set on the node. If the node is not created<a name="line.612"></a> |
| <span class="sourceLineNo">613</span> * successfully because it already exists, this method will also set a watcher on the node. If<a name="line.613"></a> |
| <span class="sourceLineNo">614</span> * there is another problem, a KeeperException will be thrown.<a name="line.614"></a> |
| <span class="sourceLineNo">615</span> * @param zkw zk reference<a name="line.615"></a> |
| <span class="sourceLineNo">616</span> * @param znode path of node<a name="line.616"></a> |
| <span class="sourceLineNo">617</span> * @param data data of node<a name="line.617"></a> |
| <span class="sourceLineNo">618</span> * @return true if node created, false if not, watch set in both cases<a name="line.618"></a> |
| <span class="sourceLineNo">619</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.619"></a> |
| <span class="sourceLineNo">620</span> */<a name="line.620"></a> |
| <span class="sourceLineNo">621</span> public static boolean createEphemeralNodeAndWatch(ZKWatcher zkw, String znode, byte[] data)<a name="line.621"></a> |
| <span class="sourceLineNo">622</span> throws KeeperException {<a name="line.622"></a> |
| <span class="sourceLineNo">623</span> boolean ret = true;<a name="line.623"></a> |
| <span class="sourceLineNo">624</span> try {<a name="line.624"></a> |
| <span class="sourceLineNo">625</span> zkw.getRecoverableZooKeeper().create(znode, data, zkw.createACL(znode), CreateMode.EPHEMERAL);<a name="line.625"></a> |
| <span class="sourceLineNo">626</span> } catch (KeeperException.NodeExistsException nee) {<a name="line.626"></a> |
| <span class="sourceLineNo">627</span> ret = false;<a name="line.627"></a> |
| <span class="sourceLineNo">628</span> } catch (InterruptedException e) {<a name="line.628"></a> |
| <span class="sourceLineNo">629</span> LOG.info("Interrupted", e);<a name="line.629"></a> |
| <span class="sourceLineNo">630</span> Thread.currentThread().interrupt();<a name="line.630"></a> |
| <span class="sourceLineNo">631</span> }<a name="line.631"></a> |
| <span class="sourceLineNo">632</span> if (!watchAndCheckExists(zkw, znode)) {<a name="line.632"></a> |
| <span class="sourceLineNo">633</span> // It did exist but now it doesn't, try again<a name="line.633"></a> |
| <span class="sourceLineNo">634</span> return createEphemeralNodeAndWatch(zkw, znode, data);<a name="line.634"></a> |
| <span class="sourceLineNo">635</span> }<a name="line.635"></a> |
| <span class="sourceLineNo">636</span> return ret;<a name="line.636"></a> |
| <span class="sourceLineNo">637</span> }<a name="line.637"></a> |
| <span class="sourceLineNo">638</span><a name="line.638"></a> |
| <span class="sourceLineNo">639</span> /**<a name="line.639"></a> |
| <span class="sourceLineNo">640</span> * Creates the specified znode to be a persistent node carrying the specified data. Returns true<a name="line.640"></a> |
| <span class="sourceLineNo">641</span> * if the node was successfully created, false if the node already existed. If the node is created<a name="line.641"></a> |
| <span class="sourceLineNo">642</span> * successfully, a watcher is also set on the node. If the node is not created successfully<a name="line.642"></a> |
| <span class="sourceLineNo">643</span> * because it already exists, this method will also set a watcher on the node but return false. If<a name="line.643"></a> |
| <span class="sourceLineNo">644</span> * there is another problem, a KeeperException will be thrown.<a name="line.644"></a> |
| <span class="sourceLineNo">645</span> * @param zkw zk reference<a name="line.645"></a> |
| <span class="sourceLineNo">646</span> * @param znode path of node<a name="line.646"></a> |
| <span class="sourceLineNo">647</span> * @param data data of node<a name="line.647"></a> |
| <span class="sourceLineNo">648</span> * @return true if node created, false if not, watch set in both cases<a name="line.648"></a> |
| <span class="sourceLineNo">649</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.649"></a> |
| <span class="sourceLineNo">650</span> */<a name="line.650"></a> |
| <span class="sourceLineNo">651</span> public static boolean createNodeIfNotExistsAndWatch(ZKWatcher zkw, String znode, byte[] data)<a name="line.651"></a> |
| <span class="sourceLineNo">652</span> throws KeeperException {<a name="line.652"></a> |
| <span class="sourceLineNo">653</span> boolean ret = true;<a name="line.653"></a> |
| <span class="sourceLineNo">654</span> try {<a name="line.654"></a> |
| <span class="sourceLineNo">655</span> zkw.getRecoverableZooKeeper().create(znode, data, zkw.createACL(znode),<a name="line.655"></a> |
| <span class="sourceLineNo">656</span> CreateMode.PERSISTENT);<a name="line.656"></a> |
| <span class="sourceLineNo">657</span> } catch (KeeperException.NodeExistsException nee) {<a name="line.657"></a> |
| <span class="sourceLineNo">658</span> ret = false;<a name="line.658"></a> |
| <span class="sourceLineNo">659</span> } catch (InterruptedException e) {<a name="line.659"></a> |
| <span class="sourceLineNo">660</span> zkw.interruptedException(e);<a name="line.660"></a> |
| <span class="sourceLineNo">661</span> return false;<a name="line.661"></a> |
| <span class="sourceLineNo">662</span> }<a name="line.662"></a> |
| <span class="sourceLineNo">663</span> try {<a name="line.663"></a> |
| <span class="sourceLineNo">664</span> zkw.getRecoverableZooKeeper().exists(znode, zkw);<a name="line.664"></a> |
| <span class="sourceLineNo">665</span> } catch (InterruptedException e) {<a name="line.665"></a> |
| <span class="sourceLineNo">666</span> zkw.interruptedException(e);<a name="line.666"></a> |
| <span class="sourceLineNo">667</span> return false;<a name="line.667"></a> |
| <span class="sourceLineNo">668</span> }<a name="line.668"></a> |
| <span class="sourceLineNo">669</span> return ret;<a name="line.669"></a> |
| <span class="sourceLineNo">670</span> }<a name="line.670"></a> |
| <span class="sourceLineNo">671</span><a name="line.671"></a> |
| <span class="sourceLineNo">672</span> /**<a name="line.672"></a> |
| <span class="sourceLineNo">673</span> * Creates the specified znode with the specified data but does not watch it. Returns the znode of<a name="line.673"></a> |
| <span class="sourceLineNo">674</span> * the newly created node If there is another problem, a KeeperException will be thrown.<a name="line.674"></a> |
| <span class="sourceLineNo">675</span> * @param zkw zk reference<a name="line.675"></a> |
| <span class="sourceLineNo">676</span> * @param znode path of node<a name="line.676"></a> |
| <span class="sourceLineNo">677</span> * @param data data of node<a name="line.677"></a> |
| <span class="sourceLineNo">678</span> * @param createMode specifying whether the node to be created is ephemeral and/or sequential<a name="line.678"></a> |
| <span class="sourceLineNo">679</span> * @return true name of the newly created znode or null<a name="line.679"></a> |
| <span class="sourceLineNo">680</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.680"></a> |
| <span class="sourceLineNo">681</span> */<a name="line.681"></a> |
| <span class="sourceLineNo">682</span> public static String createNodeIfNotExistsNoWatch(ZKWatcher zkw, String znode, byte[] data,<a name="line.682"></a> |
| <span class="sourceLineNo">683</span> CreateMode createMode) throws KeeperException {<a name="line.683"></a> |
| <span class="sourceLineNo">684</span> try {<a name="line.684"></a> |
| <span class="sourceLineNo">685</span> return zkw.getRecoverableZooKeeper().create(znode, data, zkw.createACL(znode), createMode);<a name="line.685"></a> |
| <span class="sourceLineNo">686</span> } catch (KeeperException.NodeExistsException nee) {<a name="line.686"></a> |
| <span class="sourceLineNo">687</span> return znode;<a name="line.687"></a> |
| <span class="sourceLineNo">688</span> } catch (InterruptedException e) {<a name="line.688"></a> |
| <span class="sourceLineNo">689</span> zkw.interruptedException(e);<a name="line.689"></a> |
| <span class="sourceLineNo">690</span> return null;<a name="line.690"></a> |
| <span class="sourceLineNo">691</span> }<a name="line.691"></a> |
| <span class="sourceLineNo">692</span> }<a name="line.692"></a> |
| <span class="sourceLineNo">693</span><a name="line.693"></a> |
| <span class="sourceLineNo">694</span> /**<a name="line.694"></a> |
| <span class="sourceLineNo">695</span> * Creates the specified node with the specified data and watches it.<a name="line.695"></a> |
| <span class="sourceLineNo">696</span> * <p><a name="line.696"></a> |
| <span class="sourceLineNo">697</span> * Throws an exception if the node already exists.<a name="line.697"></a> |
| <span class="sourceLineNo">698</span> * <p><a name="line.698"></a> |
| <span class="sourceLineNo">699</span> * The node created is persistent and open access.<a name="line.699"></a> |
| <span class="sourceLineNo">700</span> * <p><a name="line.700"></a> |
| <span class="sourceLineNo">701</span> * Returns the version number of the created node if successful.<a name="line.701"></a> |
| <span class="sourceLineNo">702</span> * @param zkw zk reference<a name="line.702"></a> |
| <span class="sourceLineNo">703</span> * @param znode path of node to create<a name="line.703"></a> |
| <span class="sourceLineNo">704</span> * @param data data of node to create<a name="line.704"></a> |
| <span class="sourceLineNo">705</span> * @return version of node created<a name="line.705"></a> |
| <span class="sourceLineNo">706</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.706"></a> |
| <span class="sourceLineNo">707</span> * @throws KeeperException.NodeExistsException if node already exists<a name="line.707"></a> |
| <span class="sourceLineNo">708</span> */<a name="line.708"></a> |
| <span class="sourceLineNo">709</span> public static int createAndWatch(ZKWatcher zkw, String znode, byte[] data)<a name="line.709"></a> |
| <span class="sourceLineNo">710</span> throws KeeperException, KeeperException.NodeExistsException {<a name="line.710"></a> |
| <span class="sourceLineNo">711</span> try {<a name="line.711"></a> |
| <span class="sourceLineNo">712</span> zkw.getRecoverableZooKeeper().create(znode, data, zkw.createACL(znode),<a name="line.712"></a> |
| <span class="sourceLineNo">713</span> CreateMode.PERSISTENT);<a name="line.713"></a> |
| <span class="sourceLineNo">714</span> Stat stat = zkw.getRecoverableZooKeeper().exists(znode, zkw);<a name="line.714"></a> |
| <span class="sourceLineNo">715</span> if (stat == null) {<a name="line.715"></a> |
| <span class="sourceLineNo">716</span> // Likely a race condition. Someone deleted the znode.<a name="line.716"></a> |
| <span class="sourceLineNo">717</span> throw KeeperException.create(KeeperException.Code.SYSTEMERROR,<a name="line.717"></a> |
| <span class="sourceLineNo">718</span> "ZK.exists returned null (i.e.: znode does not exist) for znode=" + znode);<a name="line.718"></a> |
| <span class="sourceLineNo">719</span> }<a name="line.719"></a> |
| <span class="sourceLineNo">720</span><a name="line.720"></a> |
| <span class="sourceLineNo">721</span> return stat.getVersion();<a name="line.721"></a> |
| <span class="sourceLineNo">722</span> } catch (InterruptedException e) {<a name="line.722"></a> |
| <span class="sourceLineNo">723</span> zkw.interruptedException(e);<a name="line.723"></a> |
| <span class="sourceLineNo">724</span> return -1;<a name="line.724"></a> |
| <span class="sourceLineNo">725</span> }<a name="line.725"></a> |
| <span class="sourceLineNo">726</span> }<a name="line.726"></a> |
| <span class="sourceLineNo">727</span><a name="line.727"></a> |
| <span class="sourceLineNo">728</span> /**<a name="line.728"></a> |
| <span class="sourceLineNo">729</span> * Async creates the specified node with the specified data.<a name="line.729"></a> |
| <span class="sourceLineNo">730</span> * <p><a name="line.730"></a> |
| <span class="sourceLineNo">731</span> * Throws an exception if the node already exists.<a name="line.731"></a> |
| <span class="sourceLineNo">732</span> * <p><a name="line.732"></a> |
| <span class="sourceLineNo">733</span> * The node created is persistent and open access.<a name="line.733"></a> |
| <span class="sourceLineNo">734</span> * @param zkw zk reference<a name="line.734"></a> |
| <span class="sourceLineNo">735</span> * @param znode path of node to create<a name="line.735"></a> |
| <span class="sourceLineNo">736</span> * @param data data of node to create<a name="line.736"></a> |
| <span class="sourceLineNo">737</span> * @param cb the callback to use for the creation<a name="line.737"></a> |
| <span class="sourceLineNo">738</span> * @param ctx the context to use for the creation<a name="line.738"></a> |
| <span class="sourceLineNo">739</span> */<a name="line.739"></a> |
| <span class="sourceLineNo">740</span> public static void asyncCreate(ZKWatcher zkw, String znode, byte[] data,<a name="line.740"></a> |
| <span class="sourceLineNo">741</span> final AsyncCallback.StringCallback cb, final Object ctx) {<a name="line.741"></a> |
| <span class="sourceLineNo">742</span> zkw.getRecoverableZooKeeper().getZooKeeper().create(znode, data, zkw.createACL(znode),<a name="line.742"></a> |
| <span class="sourceLineNo">743</span> CreateMode.PERSISTENT, cb, ctx);<a name="line.743"></a> |
| <span class="sourceLineNo">744</span> }<a name="line.744"></a> |
| <span class="sourceLineNo">745</span><a name="line.745"></a> |
| <span class="sourceLineNo">746</span> /**<a name="line.746"></a> |
| <span class="sourceLineNo">747</span> * Creates the specified node, iff the node does not exist. Does not set a watch and fails<a name="line.747"></a> |
| <span class="sourceLineNo">748</span> * silently if the node already exists. The node created is persistent and open access.<a name="line.748"></a> |
| <span class="sourceLineNo">749</span> * @param zkw zk reference<a name="line.749"></a> |
| <span class="sourceLineNo">750</span> * @param znode path of node<a name="line.750"></a> |
| <span class="sourceLineNo">751</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.751"></a> |
| <span class="sourceLineNo">752</span> */<a name="line.752"></a> |
| <span class="sourceLineNo">753</span> public static void createAndFailSilent(ZKWatcher zkw, String znode) throws KeeperException {<a name="line.753"></a> |
| <span class="sourceLineNo">754</span> createAndFailSilent(zkw, znode, new byte[0]);<a name="line.754"></a> |
| <span class="sourceLineNo">755</span> }<a name="line.755"></a> |
| <span class="sourceLineNo">756</span><a name="line.756"></a> |
| <span class="sourceLineNo">757</span> /**<a name="line.757"></a> |
| <span class="sourceLineNo">758</span> * Creates the specified node containing specified data, iff the node does not exist. Does not set<a name="line.758"></a> |
| <span class="sourceLineNo">759</span> * a watch and fails silently if the node already exists. The node created is persistent and open<a name="line.759"></a> |
| <span class="sourceLineNo">760</span> * access.<a name="line.760"></a> |
| <span class="sourceLineNo">761</span> * @param zkw zk reference<a name="line.761"></a> |
| <span class="sourceLineNo">762</span> * @param znode path of node<a name="line.762"></a> |
| <span class="sourceLineNo">763</span> * @param data a byte array data to store in the znode<a name="line.763"></a> |
| <span class="sourceLineNo">764</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.764"></a> |
| <span class="sourceLineNo">765</span> */<a name="line.765"></a> |
| <span class="sourceLineNo">766</span> public static void createAndFailSilent(ZKWatcher zkw, String znode, byte[] data)<a name="line.766"></a> |
| <span class="sourceLineNo">767</span> throws KeeperException {<a name="line.767"></a> |
| <span class="sourceLineNo">768</span> createAndFailSilent(zkw, (CreateAndFailSilent) ZKUtilOp.createAndFailSilent(znode, data));<a name="line.768"></a> |
| <span class="sourceLineNo">769</span> }<a name="line.769"></a> |
| <span class="sourceLineNo">770</span><a name="line.770"></a> |
| <span class="sourceLineNo">771</span> private static void createAndFailSilent(ZKWatcher zkw, CreateAndFailSilent cafs)<a name="line.771"></a> |
| <span class="sourceLineNo">772</span> throws KeeperException {<a name="line.772"></a> |
| <span class="sourceLineNo">773</span> CreateRequest create = (CreateRequest) toZooKeeperOp(zkw, cafs).toRequestRecord();<a name="line.773"></a> |
| <span class="sourceLineNo">774</span> String znode = create.getPath();<a name="line.774"></a> |
| <span class="sourceLineNo">775</span> RecoverableZooKeeper zk = zkw.getRecoverableZooKeeper();<a name="line.775"></a> |
| <span class="sourceLineNo">776</span> try {<a name="line.776"></a> |
| <span class="sourceLineNo">777</span> if (zk.exists(znode, false) == null) {<a name="line.777"></a> |
| <span class="sourceLineNo">778</span> zk.create(znode, create.getData(), create.getAcl(), CreateMode.fromFlag(create.getFlags()));<a name="line.778"></a> |
| <span class="sourceLineNo">779</span> }<a name="line.779"></a> |
| <span class="sourceLineNo">780</span> } catch (KeeperException.NodeExistsException nee) {<a name="line.780"></a> |
| <span class="sourceLineNo">781</span> // pass<a name="line.781"></a> |
| <span class="sourceLineNo">782</span> } catch (KeeperException.NoAuthException nee) {<a name="line.782"></a> |
| <span class="sourceLineNo">783</span> try {<a name="line.783"></a> |
| <span class="sourceLineNo">784</span> if (zk.exists(znode, false) == null) {<a name="line.784"></a> |
| <span class="sourceLineNo">785</span> // If we failed to create the file and it does not already exist.<a name="line.785"></a> |
| <span class="sourceLineNo">786</span> throw nee;<a name="line.786"></a> |
| <span class="sourceLineNo">787</span> }<a name="line.787"></a> |
| <span class="sourceLineNo">788</span> } catch (InterruptedException ie) {<a name="line.788"></a> |
| <span class="sourceLineNo">789</span> zkw.interruptedException(ie);<a name="line.789"></a> |
| <span class="sourceLineNo">790</span> }<a name="line.790"></a> |
| <span class="sourceLineNo">791</span> } catch (InterruptedException ie) {<a name="line.791"></a> |
| <span class="sourceLineNo">792</span> zkw.interruptedException(ie);<a name="line.792"></a> |
| <span class="sourceLineNo">793</span> }<a name="line.793"></a> |
| <span class="sourceLineNo">794</span> }<a name="line.794"></a> |
| <span class="sourceLineNo">795</span><a name="line.795"></a> |
| <span class="sourceLineNo">796</span> /**<a name="line.796"></a> |
| <span class="sourceLineNo">797</span> * Creates the specified node and all parent nodes required for it to exist. No watches are set<a name="line.797"></a> |
| <span class="sourceLineNo">798</span> * and no errors are thrown if the node already exists. The nodes created are persistent and open<a name="line.798"></a> |
| <span class="sourceLineNo">799</span> * access.<a name="line.799"></a> |
| <span class="sourceLineNo">800</span> * @param zkw zk reference<a name="line.800"></a> |
| <span class="sourceLineNo">801</span> * @param znode path of node<a name="line.801"></a> |
| <span class="sourceLineNo">802</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.802"></a> |
| <span class="sourceLineNo">803</span> */<a name="line.803"></a> |
| <span class="sourceLineNo">804</span> public static void createWithParents(ZKWatcher zkw, String znode) throws KeeperException {<a name="line.804"></a> |
| <span class="sourceLineNo">805</span> createWithParents(zkw, znode, new byte[0]);<a name="line.805"></a> |
| <span class="sourceLineNo">806</span> }<a name="line.806"></a> |
| <span class="sourceLineNo">807</span><a name="line.807"></a> |
| <span class="sourceLineNo">808</span> /**<a name="line.808"></a> |
| <span class="sourceLineNo">809</span> * Creates the specified node and all parent nodes required for it to exist. The creation of<a name="line.809"></a> |
| <span class="sourceLineNo">810</span> * parent znodes is not atomic with the leafe znode creation but the data is written atomically<a name="line.810"></a> |
| <span class="sourceLineNo">811</span> * when the leaf node is created. No watches are set and no errors are thrown if the node already<a name="line.811"></a> |
| <span class="sourceLineNo">812</span> * exists. The nodes created are persistent and open access.<a name="line.812"></a> |
| <span class="sourceLineNo">813</span> * @param zkw zk reference<a name="line.813"></a> |
| <span class="sourceLineNo">814</span> * @param znode path of node<a name="line.814"></a> |
| <span class="sourceLineNo">815</span> * @throws KeeperException if unexpected zookeeper exception<a name="line.815"></a> |
| <span class="sourceLineNo">816</span> */<a name="line.816"></a> |
| <span class="sourceLineNo">817</span> public static void createWithParents(ZKWatcher zkw, String znode, byte[] data)<a name="line.817"></a> |
| <span class="sourceLineNo">818</span> throws KeeperException {<a name="line.818"></a> |
| <span class="sourceLineNo">819</span> try {<a name="line.819"></a> |
| <span class="sourceLineNo">820</span> if (znode == null) {<a name="line.820"></a> |
| <span class="sourceLineNo">821</span> return;<a name="line.821"></a> |
| <span class="sourceLineNo">822</span> }<a name="line.822"></a> |
| <span class="sourceLineNo">823</span> zkw.getRecoverableZooKeeper().create(znode, data, zkw.createACL(znode),<a name="line.823"></a> |
| <span class="sourceLineNo">824</span> CreateMode.PERSISTENT);<a name="line.824"></a> |
| <span class="sourceLineNo">825</span> } catch (KeeperException.NodeExistsException nee) {<a name="line.825"></a> |
| <span class="sourceLineNo">826</span> return;<a name="line.826"></a> |
| <span class="sourceLineNo">827</span> } catch (KeeperException.NoNodeException nne) {<a name="line.827"></a> |
| <span class="sourceLineNo">828</span> createWithParents(zkw, getParent(znode));<a name="line.828"></a> |
| <span class="sourceLineNo">829</span> createWithParents(zkw, znode, data);<a name="line.829"></a> |
| <span class="sourceLineNo">830</span> } catch (InterruptedException ie) {<a name="line.830"></a> |
| <span class="sourceLineNo">831</span> zkw.interruptedException(ie);<a name="line.831"></a> |
| <span class="sourceLineNo">832</span> }<a name="line.832"></a> |
| <span class="sourceLineNo">833</span> }<a name="line.833"></a> |
| <span class="sourceLineNo">834</span><a name="line.834"></a> |
| <span class="sourceLineNo">835</span> //<a name="line.835"></a> |
| <span class="sourceLineNo">836</span> // Deletes<a name="line.836"></a> |
| <span class="sourceLineNo">837</span> //<a name="line.837"></a> |
| <span class="sourceLineNo">838</span><a name="line.838"></a> |
| <span class="sourceLineNo">839</span> /**<a name="line.839"></a> |
| <span class="sourceLineNo">840</span> * Delete the specified node. Sets no watches. Throws all exceptions.<a name="line.840"></a> |
| <span class="sourceLineNo">841</span> */<a name="line.841"></a> |
| <span class="sourceLineNo">842</span> public static void deleteNode(ZKWatcher zkw, String node) throws KeeperException {<a name="line.842"></a> |
| <span class="sourceLineNo">843</span> deleteNode(zkw, node, -1);<a name="line.843"></a> |
| <span class="sourceLineNo">844</span> }<a name="line.844"></a> |
| <span class="sourceLineNo">845</span><a name="line.845"></a> |
| <span class="sourceLineNo">846</span> /**<a name="line.846"></a> |
| <span class="sourceLineNo">847</span> * Delete the specified node with the specified version. Sets no watches. Throws all exceptions.<a name="line.847"></a> |
| <span class="sourceLineNo">848</span> */<a name="line.848"></a> |
| <span class="sourceLineNo">849</span> public static boolean deleteNode(ZKWatcher zkw, String node, int version) throws KeeperException {<a name="line.849"></a> |
| <span class="sourceLineNo">850</span> try {<a name="line.850"></a> |
| <span class="sourceLineNo">851</span> zkw.getRecoverableZooKeeper().delete(node, version);<a name="line.851"></a> |
| <span class="sourceLineNo">852</span> return true;<a name="line.852"></a> |
| <span class="sourceLineNo">853</span> } catch (KeeperException.BadVersionException bve) {<a name="line.853"></a> |
| <span class="sourceLineNo">854</span> return false;<a name="line.854"></a> |
| <span class="sourceLineNo">855</span> } catch (InterruptedException ie) {<a name="line.855"></a> |
| <span class="sourceLineNo">856</span> zkw.interruptedException(ie);<a name="line.856"></a> |
| <span class="sourceLineNo">857</span> return false;<a name="line.857"></a> |
| <span class="sourceLineNo">858</span> }<a name="line.858"></a> |
| <span class="sourceLineNo">859</span> }<a name="line.859"></a> |
| <span class="sourceLineNo">860</span><a name="line.860"></a> |
| <span class="sourceLineNo">861</span> /**<a name="line.861"></a> |
| <span class="sourceLineNo">862</span> * Deletes the specified node. Fails silent if the node does not exist.<a name="line.862"></a> |
| <span class="sourceLineNo">863</span> * @param zkw reference to the {@link ZKWatcher} which also contains configuration and operation<a name="line.863"></a> |
| <span class="sourceLineNo">864</span> * @param node the node to delete<a name="line.864"></a> |
| <span class="sourceLineNo">865</span> * @throws KeeperException if a ZooKeeper operation fails<a name="line.865"></a> |
| <span class="sourceLineNo">866</span> */<a name="line.866"></a> |
| <span class="sourceLineNo">867</span> public static void deleteNodeFailSilent(ZKWatcher zkw, String node) throws KeeperException {<a name="line.867"></a> |
| <span class="sourceLineNo">868</span> deleteNodeFailSilent(zkw, (DeleteNodeFailSilent) ZKUtilOp.deleteNodeFailSilent(node));<a name="line.868"></a> |
| <span class="sourceLineNo">869</span> }<a name="line.869"></a> |
| <span class="sourceLineNo">870</span><a name="line.870"></a> |
| <span class="sourceLineNo">871</span> private static void deleteNodeFailSilent(ZKWatcher zkw, DeleteNodeFailSilent dnfs)<a name="line.871"></a> |
| <span class="sourceLineNo">872</span> throws KeeperException {<a name="line.872"></a> |
| <span class="sourceLineNo">873</span> DeleteRequest delete = (DeleteRequest) toZooKeeperOp(zkw, dnfs).toRequestRecord();<a name="line.873"></a> |
| <span class="sourceLineNo">874</span> try {<a name="line.874"></a> |
| <span class="sourceLineNo">875</span> zkw.getRecoverableZooKeeper().delete(delete.getPath(), delete.getVersion());<a name="line.875"></a> |
| <span class="sourceLineNo">876</span> } catch (KeeperException.NoNodeException nne) {<a name="line.876"></a> |
| <span class="sourceLineNo">877</span> } catch (InterruptedException ie) {<a name="line.877"></a> |
| <span class="sourceLineNo">878</span> zkw.interruptedException(ie);<a name="line.878"></a> |
| <span class="sourceLineNo">879</span> }<a name="line.879"></a> |
| <span class="sourceLineNo">880</span> }<a name="line.880"></a> |
| <span class="sourceLineNo">881</span><a name="line.881"></a> |
| <span class="sourceLineNo">882</span> /**<a name="line.882"></a> |
| <span class="sourceLineNo">883</span> * Delete the specified node and all of it's children.<a name="line.883"></a> |
| <span class="sourceLineNo">884</span> * <p><a name="line.884"></a> |
| <span class="sourceLineNo">885</span> * If the node does not exist, just returns.<a name="line.885"></a> |
| <span class="sourceLineNo">886</span> * <p><a name="line.886"></a> |
| <span class="sourceLineNo">887</span> * Sets no watches. Throws all exceptions besides dealing with deletion of children.<a name="line.887"></a> |
| <span class="sourceLineNo">888</span> */<a name="line.888"></a> |
| <span class="sourceLineNo">889</span> public static void deleteNodeRecursively(ZKWatcher zkw, String node) throws KeeperException {<a name="line.889"></a> |
| <span class="sourceLineNo">890</span> deleteNodeRecursivelyMultiOrSequential(zkw, true, node);<a name="line.890"></a> |
| <span class="sourceLineNo">891</span> }<a name="line.891"></a> |
| <span class="sourceLineNo">892</span><a name="line.892"></a> |
| <span class="sourceLineNo">893</span> /**<a name="line.893"></a> |
| <span class="sourceLineNo">894</span> * Delete all the children of the specified node but not the node itself. Sets no watches. Throws<a name="line.894"></a> |
| <span class="sourceLineNo">895</span> * all exceptions besides dealing with deletion of children.<a name="line.895"></a> |
| <span class="sourceLineNo">896</span> * @throws KeeperException if a ZooKeeper operation fails<a name="line.896"></a> |
| <span class="sourceLineNo">897</span> */<a name="line.897"></a> |
| <span class="sourceLineNo">898</span> public static void deleteChildrenRecursively(ZKWatcher zkw, String node) throws KeeperException {<a name="line.898"></a> |
| <span class="sourceLineNo">899</span> deleteChildrenRecursivelyMultiOrSequential(zkw, true, node);<a name="line.899"></a> |
| <span class="sourceLineNo">900</span> }<a name="line.900"></a> |
| <span class="sourceLineNo">901</span><a name="line.901"></a> |
| <span class="sourceLineNo">902</span> /**<a name="line.902"></a> |
| <span class="sourceLineNo">903</span> * Delete all the children of the specified node but not the node itself. This will first traverse<a name="line.903"></a> |
| <span class="sourceLineNo">904</span> * the znode tree for listing the children and then delete these znodes using multi-update api or<a name="line.904"></a> |
| <span class="sourceLineNo">905</span> * sequential based on the specified configurations.<a name="line.905"></a> |
| <span class="sourceLineNo">906</span> * <p><a name="line.906"></a> |
| <span class="sourceLineNo">907</span> * Sets no watches. Throws all exceptions besides dealing with deletion of children.<a name="line.907"></a> |
| <span class="sourceLineNo">908</span> * <p><a name="line.908"></a> |
| <span class="sourceLineNo">909</span> * If the following is true:<a name="line.909"></a> |
| <span class="sourceLineNo">910</span> * <ul><a name="line.910"></a> |
| <span class="sourceLineNo">911</span> * <li>runSequentialOnMultiFailure is true<a name="line.911"></a> |
| <span class="sourceLineNo">912</span> * </ul><a name="line.912"></a> |
| <span class="sourceLineNo">913</span> * on calling multi, we get a ZooKeeper exception that can be handled by a sequential call(*), we<a name="line.913"></a> |
| <span class="sourceLineNo">914</span> * retry the operations one-by-one (sequentially). - zk reference - if true when we get a<a name="line.914"></a> |
| <span class="sourceLineNo">915</span> * ZooKeeper exception that could retry the operations one-by-one (sequentially) - path of the<a name="line.915"></a> |
| <span class="sourceLineNo">916</span> * parent node(s)<a name="line.916"></a> |
| <span class="sourceLineNo">917</span> * @throws KeeperException.NotEmptyException if node has children while deleting if unexpected<a name="line.917"></a> |
| <span class="sourceLineNo">918</span> * ZooKeeper exception if an invalid path is specified<a name="line.918"></a> |
| <span class="sourceLineNo">919</span> */<a name="line.919"></a> |
| <span class="sourceLineNo">920</span> public static void deleteChildrenRecursivelyMultiOrSequential(ZKWatcher zkw,<a name="line.920"></a> |
| <span class="sourceLineNo">921</span> boolean runSequentialOnMultiFailure, String... pathRoots) throws KeeperException {<a name="line.921"></a> |
| <span class="sourceLineNo">922</span> if (pathRoots == null || pathRoots.length <= 0) {<a name="line.922"></a> |
| <span class="sourceLineNo">923</span> LOG.warn("Given path is not valid!");<a name="line.923"></a> |
| <span class="sourceLineNo">924</span> return;<a name="line.924"></a> |
| <span class="sourceLineNo">925</span> }<a name="line.925"></a> |
| <span class="sourceLineNo">926</span> List<ZKUtilOp> ops = new ArrayList<>();<a name="line.926"></a> |
| <span class="sourceLineNo">927</span> for (String eachRoot : pathRoots) {<a name="line.927"></a> |
| <span class="sourceLineNo">928</span> List<String> children = listChildrenBFSNoWatch(zkw, eachRoot);<a name="line.928"></a> |
| <span class="sourceLineNo">929</span> // Delete the leaves first and eventually get rid of the root<a name="line.929"></a> |
| <span class="sourceLineNo">930</span> for (int i = children.size() - 1; i >= 0; --i) {<a name="line.930"></a> |
| <span class="sourceLineNo">931</span> ops.add(ZKUtilOp.deleteNodeFailSilent(children.get(i)));<a name="line.931"></a> |
| <span class="sourceLineNo">932</span> }<a name="line.932"></a> |
| <span class="sourceLineNo">933</span> }<a name="line.933"></a> |
| <span class="sourceLineNo">934</span> submitBatchedMultiOrSequential(zkw, runSequentialOnMultiFailure, ops);<a name="line.934"></a> |
| <span class="sourceLineNo">935</span> }<a name="line.935"></a> |
| <span class="sourceLineNo">936</span><a name="line.936"></a> |
| <span class="sourceLineNo">937</span> /**<a name="line.937"></a> |
| <span class="sourceLineNo">938</span> * Delete the specified node and its children. This traverse the znode tree for listing the<a name="line.938"></a> |
| <span class="sourceLineNo">939</span> * children and then delete these znodes including the parent using multi-update api or sequential<a name="line.939"></a> |
| <span class="sourceLineNo">940</span> * based on the specified configurations.<a name="line.940"></a> |
| <span class="sourceLineNo">941</span> * <p><a name="line.941"></a> |
| <span class="sourceLineNo">942</span> * Sets no watches. Throws all exceptions besides dealing with deletion of children.<a name="line.942"></a> |
| <span class="sourceLineNo">943</span> * <p><a name="line.943"></a> |
| <span class="sourceLineNo">944</span> * If the following is true:<a name="line.944"></a> |
| <span class="sourceLineNo">945</span> * <ul><a name="line.945"></a> |
| <span class="sourceLineNo">946</span> * <li>runSequentialOnMultiFailure is true<a name="line.946"></a> |
| <span class="sourceLineNo">947</span> * </ul><a name="line.947"></a> |
| <span class="sourceLineNo">948</span> * on calling multi, we get a ZooKeeper exception that can be handled by a sequential call(*), we<a name="line.948"></a> |
| <span class="sourceLineNo">949</span> * retry the operations one-by-one (sequentially). - zk reference - if true when we get a<a name="line.949"></a> |
| <span class="sourceLineNo">950</span> * ZooKeeper exception that could retry the operations one-by-one (sequentially) - path of the<a name="line.950"></a> |
| <span class="sourceLineNo">951</span> * parent node(s)<a name="line.951"></a> |
| <span class="sourceLineNo">952</span> * @throws KeeperException.NotEmptyException if node has children while deleting if unexpected<a name="line.952"></a> |
| <span class="sourceLineNo">953</span> * ZooKeeper exception if an invalid path is specified<a name="line.953"></a> |
| <span class="sourceLineNo">954</span> */<a name="line.954"></a> |
| <span class="sourceLineNo">955</span> public static void deleteNodeRecursivelyMultiOrSequential(ZKWatcher zkw,<a name="line.955"></a> |
| <span class="sourceLineNo">956</span> boolean runSequentialOnMultiFailure, String... pathRoots) throws KeeperException {<a name="line.956"></a> |
| <span class="sourceLineNo">957</span> if (pathRoots == null || pathRoots.length <= 0) {<a name="line.957"></a> |
| <span class="sourceLineNo">958</span> LOG.warn("Given path is not valid!");<a name="line.958"></a> |
| <span class="sourceLineNo">959</span> return;<a name="line.959"></a> |
| <span class="sourceLineNo">960</span> }<a name="line.960"></a> |
| <span class="sourceLineNo">961</span> List<ZKUtilOp> ops = new ArrayList<>();<a name="line.961"></a> |
| <span class="sourceLineNo">962</span> for (String eachRoot : pathRoots) {<a name="line.962"></a> |
| <span class="sourceLineNo">963</span> // ZooKeeper Watches are one time triggers; When children of parent nodes are deleted<a name="line.963"></a> |
| <span class="sourceLineNo">964</span> // recursively, must set another watch, get notified of delete node<a name="line.964"></a> |
| <span class="sourceLineNo">965</span> List<String> children = listChildrenBFSAndWatchThem(zkw, eachRoot);<a name="line.965"></a> |
| <span class="sourceLineNo">966</span> // Delete the leaves first and eventually get rid of the root<a name="line.966"></a> |
| <span class="sourceLineNo">967</span> for (int i = children.size() - 1; i >= 0; --i) {<a name="line.967"></a> |
| <span class="sourceLineNo">968</span> ops.add(ZKUtilOp.deleteNodeFailSilent(children.get(i)));<a name="line.968"></a> |
| <span class="sourceLineNo">969</span> }<a name="line.969"></a> |
| <span class="sourceLineNo">970</span> try {<a name="line.970"></a> |
| <span class="sourceLineNo">971</span> if (zkw.getRecoverableZooKeeper().exists(eachRoot, zkw) != null) {<a name="line.971"></a> |
| <span class="sourceLineNo">972</span> ops.add(ZKUtilOp.deleteNodeFailSilent(eachRoot));<a name="line.972"></a> |
| <span class="sourceLineNo">973</span> }<a name="line.973"></a> |
| <span class="sourceLineNo">974</span> } catch (InterruptedException e) {<a name="line.974"></a> |
| <span class="sourceLineNo">975</span> zkw.interruptedException(e);<a name="line.975"></a> |
| <span class="sourceLineNo">976</span> }<a name="line.976"></a> |
| <span class="sourceLineNo">977</span> }<a name="line.977"></a> |
| <span class="sourceLineNo">978</span> submitBatchedMultiOrSequential(zkw, runSequentialOnMultiFailure, ops);<a name="line.978"></a> |
| <span class="sourceLineNo">979</span> }<a name="line.979"></a> |
| <span class="sourceLineNo">980</span><a name="line.980"></a> |
| <span class="sourceLineNo">981</span> /**<a name="line.981"></a> |
| <span class="sourceLineNo">982</span> * Chunks the provided {@code ops} when their approximate size exceeds the the configured limit.<a name="line.982"></a> |
| <span class="sourceLineNo">983</span> * Take caution that this can ONLY be used for operations where atomicity is not important, e.g.<a name="line.983"></a> |
| <span class="sourceLineNo">984</span> * deletions. It must not be used when atomicity of the operations is critical.<a name="line.984"></a> |
| <span class="sourceLineNo">985</span> * @param zkw reference to the {@link ZKWatcher} which contains<a name="line.985"></a> |
| <span class="sourceLineNo">986</span> * configuration and constants<a name="line.986"></a> |
| <span class="sourceLineNo">987</span> * @param runSequentialOnMultiFailure if true when we get a ZooKeeper exception that could retry<a name="line.987"></a> |
| <span class="sourceLineNo">988</span> * the operations one-by-one (sequentially)<a name="line.988"></a> |
| <span class="sourceLineNo">989</span> * @param ops list of ZKUtilOp {@link ZKUtilOp} to partition while<a name="line.989"></a> |
| <span class="sourceLineNo">990</span> * submitting batched multi or sequential<a name="line.990"></a> |
| <span class="sourceLineNo">991</span> * @throws KeeperException unexpected ZooKeeper Exception / Zookeeper unreachable<a name="line.991"></a> |
| <span class="sourceLineNo">992</span> */<a name="line.992"></a> |
| <span class="sourceLineNo">993</span> private static void submitBatchedMultiOrSequential(ZKWatcher zkw,<a name="line.993"></a> |
| <span class="sourceLineNo">994</span> boolean runSequentialOnMultiFailure, List<ZKUtilOp> ops) throws KeeperException {<a name="line.994"></a> |
| <span class="sourceLineNo">995</span> // at least one element should exist<a name="line.995"></a> |
| <span class="sourceLineNo">996</span> if (ops.isEmpty()) {<a name="line.996"></a> |
| <span class="sourceLineNo">997</span> return;<a name="line.997"></a> |
| <span class="sourceLineNo">998</span> }<a name="line.998"></a> |
| <span class="sourceLineNo">999</span> final int maxMultiSize = zkw.getRecoverableZooKeeper().getMaxMultiSizeLimit();<a name="line.999"></a> |
| <span class="sourceLineNo">1000</span> // Batch up the items to over smashing through jute.maxbuffer with too many Ops.<a name="line.1000"></a> |
| <span class="sourceLineNo">1001</span> final List<List<ZKUtilOp>> batchedOps = partitionOps(ops, maxMultiSize);<a name="line.1001"></a> |
| <span class="sourceLineNo">1002</span> // Would use forEach() but have to handle KeeperException<a name="line.1002"></a> |
| <span class="sourceLineNo">1003</span> for (List<ZKUtilOp> batch : batchedOps) {<a name="line.1003"></a> |
| <span class="sourceLineNo">1004</span> multiOrSequential(zkw, batch, runSequentialOnMultiFailure);<a name="line.1004"></a> |
| <span class="sourceLineNo">1005</span> }<a name="line.1005"></a> |
| <span class="sourceLineNo">1006</span> }<a name="line.1006"></a> |
| <span class="sourceLineNo">1007</span><a name="line.1007"></a> |
| <span class="sourceLineNo">1008</span> /**<a name="line.1008"></a> |
| <span class="sourceLineNo">1009</span> * Partition the list of {@code ops} by size (using {@link #estimateSize(ZKUtilOp)}).<a name="line.1009"></a> |
| <span class="sourceLineNo">1010</span> */<a name="line.1010"></a> |
| <span class="sourceLineNo">1011</span> static List<List<ZKUtilOp>> partitionOps(List<ZKUtilOp> ops, int maxPartitionSize) {<a name="line.1011"></a> |
| <span class="sourceLineNo">1012</span> List<List<ZKUtilOp>> partitionedOps = new ArrayList<>();<a name="line.1012"></a> |
| <span class="sourceLineNo">1013</span> List<ZKUtilOp> currentPartition = new ArrayList<>();<a name="line.1013"></a> |
| <span class="sourceLineNo">1014</span> int currentPartitionSize = 0;<a name="line.1014"></a> |
| <span class="sourceLineNo">1015</span> partitionedOps.add(currentPartition);<a name="line.1015"></a> |
| <span class="sourceLineNo">1016</span> Iterator<ZKUtilOp> iter = ops.iterator();<a name="line.1016"></a> |
| <span class="sourceLineNo">1017</span> while (iter.hasNext()) {<a name="line.1017"></a> |
| <span class="sourceLineNo">1018</span> ZKUtilOp currentOp = iter.next();<a name="line.1018"></a> |
| <span class="sourceLineNo">1019</span> int currentOpSize = estimateSize(currentOp);<a name="line.1019"></a> |
| <span class="sourceLineNo">1020</span><a name="line.1020"></a> |
| <span class="sourceLineNo">1021</span> // Roll a new partition if necessary<a name="line.1021"></a> |
| <span class="sourceLineNo">1022</span> // If the current partition is empty, put the element in there anyways.<a name="line.1022"></a> |
| <span class="sourceLineNo">1023</span> // We can roll a new partition if we get another element<a name="line.1023"></a> |
| <span class="sourceLineNo">1024</span> if (!currentPartition.isEmpty() && currentOpSize + currentPartitionSize > maxPartitionSize) {<a name="line.1024"></a> |
| <span class="sourceLineNo">1025</span> currentPartition = new ArrayList<>();<a name="line.1025"></a> |
| <span class="sourceLineNo">1026</span> partitionedOps.add(currentPartition);<a name="line.1026"></a> |
| <span class="sourceLineNo">1027</span> currentPartitionSize = 0;<a name="line.1027"></a> |
| <span class="sourceLineNo">1028</span> }<a name="line.1028"></a> |
| <span class="sourceLineNo">1029</span><a name="line.1029"></a> |
| <span class="sourceLineNo">1030</span> // Add the current op to the partition<a name="line.1030"></a> |
| <span class="sourceLineNo">1031</span> currentPartition.add(currentOp);<a name="line.1031"></a> |
| <span class="sourceLineNo">1032</span> // And record its size<a name="line.1032"></a> |
| <span class="sourceLineNo">1033</span> currentPartitionSize += currentOpSize;<a name="line.1033"></a> |
| <span class="sourceLineNo">1034</span> }<a name="line.1034"></a> |
| <span class="sourceLineNo">1035</span> return partitionedOps;<a name="line.1035"></a> |
| <span class="sourceLineNo">1036</span> }<a name="line.1036"></a> |
| <span class="sourceLineNo">1037</span><a name="line.1037"></a> |
| <span class="sourceLineNo">1038</span> static int estimateSize(ZKUtilOp op) {<a name="line.1038"></a> |
| <span class="sourceLineNo">1039</span> return Bytes.toBytes(op.getPath()).length;<a name="line.1039"></a> |
| <span class="sourceLineNo">1040</span> }<a name="line.1040"></a> |
| <span class="sourceLineNo">1041</span><a name="line.1041"></a> |
| <span class="sourceLineNo">1042</span> /**<a name="line.1042"></a> |
| <span class="sourceLineNo">1043</span> * BFS Traversal of all the children under path, with the entries in the list, in the same order<a name="line.1043"></a> |
| <span class="sourceLineNo">1044</span> * as that of the traversal. Lists all the children without setting any watches. - zk reference -<a name="line.1044"></a> |
| <span class="sourceLineNo">1045</span> * path of node<a name="line.1045"></a> |
| <span class="sourceLineNo">1046</span> * @return list of children znodes under the path if unexpected ZooKeeper exception<a name="line.1046"></a> |
| <span class="sourceLineNo">1047</span> */<a name="line.1047"></a> |
| <span class="sourceLineNo">1048</span> private static List<String> listChildrenBFSNoWatch(ZKWatcher zkw, final String znode)<a name="line.1048"></a> |
| <span class="sourceLineNo">1049</span> throws KeeperException {<a name="line.1049"></a> |
| <span class="sourceLineNo">1050</span> Deque<String> queue = new LinkedList<>();<a name="line.1050"></a> |
| <span class="sourceLineNo">1051</span> List<String> tree = new ArrayList<>();<a name="line.1051"></a> |
| <span class="sourceLineNo">1052</span> queue.add(znode);<a name="line.1052"></a> |
| <span class="sourceLineNo">1053</span> while (true) {<a name="line.1053"></a> |
| <span class="sourceLineNo">1054</span> String node = queue.pollFirst();<a name="line.1054"></a> |
| <span class="sourceLineNo">1055</span> if (node == null) {<a name="line.1055"></a> |
| <span class="sourceLineNo">1056</span> break;<a name="line.1056"></a> |
| <span class="sourceLineNo">1057</span> }<a name="line.1057"></a> |
| <span class="sourceLineNo">1058</span> List<String> children = listChildrenNoWatch(zkw, node);<a name="line.1058"></a> |
| <span class="sourceLineNo">1059</span> if (children == null) {<a name="line.1059"></a> |
| <span class="sourceLineNo">1060</span> continue;<a name="line.1060"></a> |
| <span class="sourceLineNo">1061</span> }<a name="line.1061"></a> |
| <span class="sourceLineNo">1062</span> for (final String child : children) {<a name="line.1062"></a> |
| <span class="sourceLineNo">1063</span> final String childPath = node + "/" + child;<a name="line.1063"></a> |
| <span class="sourceLineNo">1064</span> queue.add(childPath);<a name="line.1064"></a> |
| <span class="sourceLineNo">1065</span> tree.add(childPath);<a name="line.1065"></a> |
| <span class="sourceLineNo">1066</span> }<a name="line.1066"></a> |
| <span class="sourceLineNo">1067</span> }<a name="line.1067"></a> |
| <span class="sourceLineNo">1068</span> return tree;<a name="line.1068"></a> |
| <span class="sourceLineNo">1069</span> }<a name="line.1069"></a> |
| <span class="sourceLineNo">1070</span><a name="line.1070"></a> |
| <span class="sourceLineNo">1071</span> /**<a name="line.1071"></a> |
| <span class="sourceLineNo">1072</span> * BFS Traversal of all the children under path, with the entries in the list, in the same order<a name="line.1072"></a> |
| <span class="sourceLineNo">1073</span> * as that of the traversal. Lists all the children and set watches on to them. - zk reference -<a name="line.1073"></a> |
| <span class="sourceLineNo">1074</span> * path of node<a name="line.1074"></a> |
| <span class="sourceLineNo">1075</span> * @return list of children znodes under the path if unexpected ZooKeeper exception<a name="line.1075"></a> |
| <span class="sourceLineNo">1076</span> */<a name="line.1076"></a> |
| <span class="sourceLineNo">1077</span> private static List<String> listChildrenBFSAndWatchThem(ZKWatcher zkw, final String znode)<a name="line.1077"></a> |
| <span class="sourceLineNo">1078</span> throws KeeperException {<a name="line.1078"></a> |
| <span class="sourceLineNo">1079</span> Deque<String> queue = new LinkedList<>();<a name="line.1079"></a> |
| <span class="sourceLineNo">1080</span> List<String> tree = new ArrayList<>();<a name="line.1080"></a> |
| <span class="sourceLineNo">1081</span> queue.add(znode);<a name="line.1081"></a> |
| <span class="sourceLineNo">1082</span> while (true) {<a name="line.1082"></a> |
| <span class="sourceLineNo">1083</span> String node = queue.pollFirst();<a name="line.1083"></a> |
| <span class="sourceLineNo">1084</span> if (node == null) {<a name="line.1084"></a> |
| <span class="sourceLineNo">1085</span> break;<a name="line.1085"></a> |
| <span class="sourceLineNo">1086</span> }<a name="line.1086"></a> |
| <span class="sourceLineNo">1087</span> List<String> children = listChildrenAndWatchThem(zkw, node);<a name="line.1087"></a> |
| <span class="sourceLineNo">1088</span> if (children == null) {<a name="line.1088"></a> |
| <span class="sourceLineNo">1089</span> continue;<a name="line.1089"></a> |
| <span class="sourceLineNo">1090</span> }<a name="line.1090"></a> |
| <span class="sourceLineNo">1091</span> for (final String child : children) {<a name="line.1091"></a> |
| <span class="sourceLineNo">1092</span> final String childPath = node + "/" + child;<a name="line.1092"></a> |
| <span class="sourceLineNo">1093</span> queue.add(childPath);<a name="line.1093"></a> |
| <span class="sourceLineNo">1094</span> tree.add(childPath);<a name="line.1094"></a> |
| <span class="sourceLineNo">1095</span> }<a name="line.1095"></a> |
| <span class="sourceLineNo">1096</span> }<a name="line.1096"></a> |
| <span class="sourceLineNo">1097</span> return tree;<a name="line.1097"></a> |
| <span class="sourceLineNo">1098</span> }<a name="line.1098"></a> |
| <span class="sourceLineNo">1099</span><a name="line.1099"></a> |
| <span class="sourceLineNo">1100</span> /**<a name="line.1100"></a> |
| <span class="sourceLineNo">1101</span> * Represents an action taken by ZKUtil, e.g. createAndFailSilent. These actions are higher-level<a name="line.1101"></a> |
| <span class="sourceLineNo">1102</span> * than ZKOp actions, which represent individual actions in the ZooKeeper API, like create.<a name="line.1102"></a> |
| <span class="sourceLineNo">1103</span> */<a name="line.1103"></a> |
| <span class="sourceLineNo">1104</span> public abstract static class ZKUtilOp {<a name="line.1104"></a> |
| <span class="sourceLineNo">1105</span> private String path;<a name="line.1105"></a> |
| <span class="sourceLineNo">1106</span><a name="line.1106"></a> |
| <span class="sourceLineNo">1107</span> @Override<a name="line.1107"></a> |
| <span class="sourceLineNo">1108</span> public String toString() {<a name="line.1108"></a> |
| <span class="sourceLineNo">1109</span> return this.getClass().getSimpleName() + ", path=" + this.path;<a name="line.1109"></a> |
| <span class="sourceLineNo">1110</span> }<a name="line.1110"></a> |
| <span class="sourceLineNo">1111</span><a name="line.1111"></a> |
| <span class="sourceLineNo">1112</span> private ZKUtilOp(String path) {<a name="line.1112"></a> |
| <span class="sourceLineNo">1113</span> this.path = path;<a name="line.1113"></a> |
| <span class="sourceLineNo">1114</span> }<a name="line.1114"></a> |
| <span class="sourceLineNo">1115</span><a name="line.1115"></a> |
| <span class="sourceLineNo">1116</span> /** Returns a createAndFailSilent ZKUtilOp */<a name="line.1116"></a> |
| <span class="sourceLineNo">1117</span> public static ZKUtilOp createAndFailSilent(String path, byte[] data) {<a name="line.1117"></a> |
| <span class="sourceLineNo">1118</span> return new CreateAndFailSilent(path, data);<a name="line.1118"></a> |
| <span class="sourceLineNo">1119</span> }<a name="line.1119"></a> |
| <span class="sourceLineNo">1120</span><a name="line.1120"></a> |
| <span class="sourceLineNo">1121</span> /** Returns a deleteNodeFailSilent ZKUtilOP */<a name="line.1121"></a> |
| <span class="sourceLineNo">1122</span> public static ZKUtilOp deleteNodeFailSilent(String path) {<a name="line.1122"></a> |
| <span class="sourceLineNo">1123</span> return new DeleteNodeFailSilent(path);<a name="line.1123"></a> |
| <span class="sourceLineNo">1124</span> }<a name="line.1124"></a> |
| <span class="sourceLineNo">1125</span><a name="line.1125"></a> |
| <span class="sourceLineNo">1126</span> /** Returns a setData ZKUtilOp */<a name="line.1126"></a> |
| <span class="sourceLineNo">1127</span> public static ZKUtilOp setData(String path, byte[] data) {<a name="line.1127"></a> |
| <span class="sourceLineNo">1128</span> return new SetData(path, data);<a name="line.1128"></a> |
| <span class="sourceLineNo">1129</span> }<a name="line.1129"></a> |
| <span class="sourceLineNo">1130</span><a name="line.1130"></a> |
| <span class="sourceLineNo">1131</span> /** Returns a setData ZKUtilOp */<a name="line.1131"></a> |
| <span class="sourceLineNo">1132</span> public static ZKUtilOp setData(String path, byte[] data, int version) {<a name="line.1132"></a> |
| <span class="sourceLineNo">1133</span> return new SetData(path, data, version);<a name="line.1133"></a> |
| <span class="sourceLineNo">1134</span> }<a name="line.1134"></a> |
| <span class="sourceLineNo">1135</span><a name="line.1135"></a> |
| <span class="sourceLineNo">1136</span> /** Returns path to znode where the ZKOp will occur */<a name="line.1136"></a> |
| <span class="sourceLineNo">1137</span> public String getPath() {<a name="line.1137"></a> |
| <span class="sourceLineNo">1138</span> return path;<a name="line.1138"></a> |
| <span class="sourceLineNo">1139</span> }<a name="line.1139"></a> |
| <span class="sourceLineNo">1140</span><a name="line.1140"></a> |
| <span class="sourceLineNo">1141</span> /**<a name="line.1141"></a> |
| <span class="sourceLineNo">1142</span> * ZKUtilOp representing createAndFailSilent in ZooKeeper (attempt to create node, ignore error<a name="line.1142"></a> |
| <span class="sourceLineNo">1143</span> * if already exists)<a name="line.1143"></a> |
| <span class="sourceLineNo">1144</span> */<a name="line.1144"></a> |
| <span class="sourceLineNo">1145</span> public static final class CreateAndFailSilent extends ZKUtilOp {<a name="line.1145"></a> |
| <span class="sourceLineNo">1146</span> private byte[] data;<a name="line.1146"></a> |
| <span class="sourceLineNo">1147</span><a name="line.1147"></a> |
| <span class="sourceLineNo">1148</span> private CreateAndFailSilent(String path, byte[] data) {<a name="line.1148"></a> |
| <span class="sourceLineNo">1149</span> super(path);<a name="line.1149"></a> |
| <span class="sourceLineNo">1150</span> this.data = data;<a name="line.1150"></a> |
| <span class="sourceLineNo">1151</span> }<a name="line.1151"></a> |
| <span class="sourceLineNo">1152</span><a name="line.1152"></a> |
| <span class="sourceLineNo">1153</span> public byte[] getData() {<a name="line.1153"></a> |
| <span class="sourceLineNo">1154</span> return data;<a name="line.1154"></a> |
| <span class="sourceLineNo">1155</span> }<a name="line.1155"></a> |
| <span class="sourceLineNo">1156</span><a name="line.1156"></a> |
| <span class="sourceLineNo">1157</span> @Override<a name="line.1157"></a> |
| <span class="sourceLineNo">1158</span> public boolean equals(Object o) {<a name="line.1158"></a> |
| <span class="sourceLineNo">1159</span> if (this == o) {<a name="line.1159"></a> |
| <span class="sourceLineNo">1160</span> return true;<a name="line.1160"></a> |
| <span class="sourceLineNo">1161</span> }<a name="line.1161"></a> |
| <span class="sourceLineNo">1162</span> if (!(o instanceof CreateAndFailSilent)) {<a name="line.1162"></a> |
| <span class="sourceLineNo">1163</span> return false;<a name="line.1163"></a> |
| <span class="sourceLineNo">1164</span> }<a name="line.1164"></a> |
| <span class="sourceLineNo">1165</span><a name="line.1165"></a> |
| <span class="sourceLineNo">1166</span> CreateAndFailSilent op = (CreateAndFailSilent) o;<a name="line.1166"></a> |
| <span class="sourceLineNo">1167</span> return getPath().equals(op.getPath()) && Arrays.equals(data, op.data);<a name="line.1167"></a> |
| <span class="sourceLineNo">1168</span> }<a name="line.1168"></a> |
| <span class="sourceLineNo">1169</span><a name="line.1169"></a> |
| <span class="sourceLineNo">1170</span> @Override<a name="line.1170"></a> |
| <span class="sourceLineNo">1171</span> public int hashCode() {<a name="line.1171"></a> |
| <span class="sourceLineNo">1172</span> int ret = 17 + getPath().hashCode() * 31;<a name="line.1172"></a> |
| <span class="sourceLineNo">1173</span> return ret * 31 + Bytes.hashCode(data);<a name="line.1173"></a> |
| <span class="sourceLineNo">1174</span> }<a name="line.1174"></a> |
| <span class="sourceLineNo">1175</span> }<a name="line.1175"></a> |
| <span class="sourceLineNo">1176</span><a name="line.1176"></a> |
| <span class="sourceLineNo">1177</span> /**<a name="line.1177"></a> |
| <span class="sourceLineNo">1178</span> * ZKUtilOp representing deleteNodeFailSilent in ZooKeeper (attempt to delete node, ignore error<a name="line.1178"></a> |
| <span class="sourceLineNo">1179</span> * if node doesn't exist)<a name="line.1179"></a> |
| <span class="sourceLineNo">1180</span> */<a name="line.1180"></a> |
| <span class="sourceLineNo">1181</span> public static final class DeleteNodeFailSilent extends ZKUtilOp {<a name="line.1181"></a> |
| <span class="sourceLineNo">1182</span> private DeleteNodeFailSilent(String path) {<a name="line.1182"></a> |
| <span class="sourceLineNo">1183</span> super(path);<a name="line.1183"></a> |
| <span class="sourceLineNo">1184</span> }<a name="line.1184"></a> |
| <span class="sourceLineNo">1185</span><a name="line.1185"></a> |
| <span class="sourceLineNo">1186</span> @Override<a name="line.1186"></a> |
| <span class="sourceLineNo">1187</span> public boolean equals(Object o) {<a name="line.1187"></a> |
| <span class="sourceLineNo">1188</span> if (this == o) {<a name="line.1188"></a> |
| <span class="sourceLineNo">1189</span> return true;<a name="line.1189"></a> |
| <span class="sourceLineNo">1190</span> }<a name="line.1190"></a> |
| <span class="sourceLineNo">1191</span> if (!(o instanceof DeleteNodeFailSilent)) {<a name="line.1191"></a> |
| <span class="sourceLineNo">1192</span> return false;<a name="line.1192"></a> |
| <span class="sourceLineNo">1193</span> }<a name="line.1193"></a> |
| <span class="sourceLineNo">1194</span><a name="line.1194"></a> |
| <span class="sourceLineNo">1195</span> return super.equals(o);<a name="line.1195"></a> |
| <span class="sourceLineNo">1196</span> }<a name="line.1196"></a> |
| <span class="sourceLineNo">1197</span><a name="line.1197"></a> |
| <span class="sourceLineNo">1198</span> @Override<a name="line.1198"></a> |
| <span class="sourceLineNo">1199</span> public int hashCode() {<a name="line.1199"></a> |
| <span class="sourceLineNo">1200</span> return getPath().hashCode();<a name="line.1200"></a> |
| <span class="sourceLineNo">1201</span> }<a name="line.1201"></a> |
| <span class="sourceLineNo">1202</span> }<a name="line.1202"></a> |
| <span class="sourceLineNo">1203</span><a name="line.1203"></a> |
| <span class="sourceLineNo">1204</span> /**<a name="line.1204"></a> |
| <span class="sourceLineNo">1205</span> * ZKUtilOp representing setData in ZooKeeper<a name="line.1205"></a> |
| <span class="sourceLineNo">1206</span> */<a name="line.1206"></a> |
| <span class="sourceLineNo">1207</span> public static final class SetData extends ZKUtilOp {<a name="line.1207"></a> |
| <span class="sourceLineNo">1208</span> private byte[] data;<a name="line.1208"></a> |
| <span class="sourceLineNo">1209</span> private int version = -1;<a name="line.1209"></a> |
| <span class="sourceLineNo">1210</span><a name="line.1210"></a> |
| <span class="sourceLineNo">1211</span> private SetData(String path, byte[] data) {<a name="line.1211"></a> |
| <span class="sourceLineNo">1212</span> super(path);<a name="line.1212"></a> |
| <span class="sourceLineNo">1213</span> this.data = data;<a name="line.1213"></a> |
| <span class="sourceLineNo">1214</span> }<a name="line.1214"></a> |
| <span class="sourceLineNo">1215</span><a name="line.1215"></a> |
| <span class="sourceLineNo">1216</span> private SetData(String path, byte[] data, int version) {<a name="line.1216"></a> |
| <span class="sourceLineNo">1217</span> super(path);<a name="line.1217"></a> |
| <span class="sourceLineNo">1218</span> this.data = data;<a name="line.1218"></a> |
| <span class="sourceLineNo">1219</span> this.version = version;<a name="line.1219"></a> |
| <span class="sourceLineNo">1220</span> }<a name="line.1220"></a> |
| <span class="sourceLineNo">1221</span><a name="line.1221"></a> |
| <span class="sourceLineNo">1222</span> public byte[] getData() {<a name="line.1222"></a> |
| <span class="sourceLineNo">1223</span> return data;<a name="line.1223"></a> |
| <span class="sourceLineNo">1224</span> }<a name="line.1224"></a> |
| <span class="sourceLineNo">1225</span><a name="line.1225"></a> |
| <span class="sourceLineNo">1226</span> public int getVersion() {<a name="line.1226"></a> |
| <span class="sourceLineNo">1227</span> return version;<a name="line.1227"></a> |
| <span class="sourceLineNo">1228</span> }<a name="line.1228"></a> |
| <span class="sourceLineNo">1229</span><a name="line.1229"></a> |
| <span class="sourceLineNo">1230</span> @Override<a name="line.1230"></a> |
| <span class="sourceLineNo">1231</span> public boolean equals(Object o) {<a name="line.1231"></a> |
| <span class="sourceLineNo">1232</span> if (this == o) {<a name="line.1232"></a> |
| <span class="sourceLineNo">1233</span> return true;<a name="line.1233"></a> |
| <span class="sourceLineNo">1234</span> }<a name="line.1234"></a> |
| <span class="sourceLineNo">1235</span> if (!(o instanceof SetData)) {<a name="line.1235"></a> |
| <span class="sourceLineNo">1236</span> return false;<a name="line.1236"></a> |
| <span class="sourceLineNo">1237</span> }<a name="line.1237"></a> |
| <span class="sourceLineNo">1238</span><a name="line.1238"></a> |
| <span class="sourceLineNo">1239</span> SetData op = (SetData) o;<a name="line.1239"></a> |
| <span class="sourceLineNo">1240</span> return getPath().equals(op.getPath()) && Arrays.equals(data, op.data)<a name="line.1240"></a> |
| <span class="sourceLineNo">1241</span> && getVersion() == op.getVersion();<a name="line.1241"></a> |
| <span class="sourceLineNo">1242</span> }<a name="line.1242"></a> |
| <span class="sourceLineNo">1243</span><a name="line.1243"></a> |
| <span class="sourceLineNo">1244</span> @Override<a name="line.1244"></a> |
| <span class="sourceLineNo">1245</span> public int hashCode() {<a name="line.1245"></a> |
| <span class="sourceLineNo">1246</span> int ret = getPath().hashCode();<a name="line.1246"></a> |
| <span class="sourceLineNo">1247</span> ret = ret * 31 + Bytes.hashCode(data);<a name="line.1247"></a> |
| <span class="sourceLineNo">1248</span> return ret * 31 + Integer.hashCode(version);<a name="line.1248"></a> |
| <span class="sourceLineNo">1249</span> }<a name="line.1249"></a> |
| <span class="sourceLineNo">1250</span> }<a name="line.1250"></a> |
| <span class="sourceLineNo">1251</span> }<a name="line.1251"></a> |
| <span class="sourceLineNo">1252</span><a name="line.1252"></a> |
| <span class="sourceLineNo">1253</span> /**<a name="line.1253"></a> |
| <span class="sourceLineNo">1254</span> * Convert from ZKUtilOp to ZKOp<a name="line.1254"></a> |
| <span class="sourceLineNo">1255</span> */<a name="line.1255"></a> |
| <span class="sourceLineNo">1256</span> private static Op toZooKeeperOp(ZKWatcher zkw, ZKUtilOp op) throws UnsupportedOperationException {<a name="line.1256"></a> |
| <span class="sourceLineNo">1257</span> if (op == null) {<a name="line.1257"></a> |
| <span class="sourceLineNo">1258</span> return null;<a name="line.1258"></a> |
| <span class="sourceLineNo">1259</span> }<a name="line.1259"></a> |
| <span class="sourceLineNo">1260</span><a name="line.1260"></a> |
| <span class="sourceLineNo">1261</span> if (op instanceof CreateAndFailSilent) {<a name="line.1261"></a> |
| <span class="sourceLineNo">1262</span> CreateAndFailSilent cafs = (CreateAndFailSilent) op;<a name="line.1262"></a> |
| <span class="sourceLineNo">1263</span> return Op.create(cafs.getPath(), cafs.getData(), zkw.createACL(cafs.getPath()),<a name="line.1263"></a> |
| <span class="sourceLineNo">1264</span> CreateMode.PERSISTENT);<a name="line.1264"></a> |
| <span class="sourceLineNo">1265</span> } else if (op instanceof DeleteNodeFailSilent) {<a name="line.1265"></a> |
| <span class="sourceLineNo">1266</span> DeleteNodeFailSilent dnfs = (DeleteNodeFailSilent) op;<a name="line.1266"></a> |
| <span class="sourceLineNo">1267</span> return Op.delete(dnfs.getPath(), -1);<a name="line.1267"></a> |
| <span class="sourceLineNo">1268</span> } else if (op instanceof SetData) {<a name="line.1268"></a> |
| <span class="sourceLineNo">1269</span> SetData sd = (SetData) op;<a name="line.1269"></a> |
| <span class="sourceLineNo">1270</span> return Op.setData(sd.getPath(), sd.getData(), sd.getVersion());<a name="line.1270"></a> |
| <span class="sourceLineNo">1271</span> } else {<a name="line.1271"></a> |
| <span class="sourceLineNo">1272</span> throw new UnsupportedOperationException(<a name="line.1272"></a> |
| <span class="sourceLineNo">1273</span> "Unexpected ZKUtilOp type: " + op.getClass().getName());<a name="line.1273"></a> |
| <span class="sourceLineNo">1274</span> }<a name="line.1274"></a> |
| <span class="sourceLineNo">1275</span> }<a name="line.1275"></a> |
| <span class="sourceLineNo">1276</span><a name="line.1276"></a> |
| <span class="sourceLineNo">1277</span> // Static boolean for warning about useMulti because ideally there will be one warning per<a name="line.1277"></a> |
| <span class="sourceLineNo">1278</span> // process instance. It is fine if two threads end up racing on this for a bit. We do not<a name="line.1278"></a> |
| <span class="sourceLineNo">1279</span> // need to use an atomic type for this, that is overkill. The goal of reducing the number of<a name="line.1279"></a> |
| <span class="sourceLineNo">1280</span> // warnings from many to one or a few at startup is still achieved.<a name="line.1280"></a> |
| <span class="sourceLineNo">1281</span> private static boolean useMultiWarn = true;<a name="line.1281"></a> |
| <span class="sourceLineNo">1282</span><a name="line.1282"></a> |
| <span class="sourceLineNo">1283</span> /**<a name="line.1283"></a> |
| <span class="sourceLineNo">1284</span> * Use ZooKeeper's multi-update functionality. If all of the following are true: -<a name="line.1284"></a> |
| <span class="sourceLineNo">1285</span> * runSequentialOnMultiFailure is true - on calling multi, we get a ZooKeeper exception that can<a name="line.1285"></a> |
| <span class="sourceLineNo">1286</span> * be handled by a sequential call(*) Then: - we retry the operations one-by-one (sequentially)<a name="line.1286"></a> |
| <span class="sourceLineNo">1287</span> * Note *: an example is receiving a NodeExistsException from a "create" call. Without multi, a<a name="line.1287"></a> |
| <span class="sourceLineNo">1288</span> * user could call "createAndFailSilent" to ensure that a node exists if they don't care who<a name="line.1288"></a> |
| <span class="sourceLineNo">1289</span> * actually created the node (i.e. the NodeExistsException from ZooKeeper is caught). This will<a name="line.1289"></a> |
| <span class="sourceLineNo">1290</span> * cause all operations in the multi to fail, however, because the NodeExistsException that<a name="line.1290"></a> |
| <span class="sourceLineNo">1291</span> * zk.create throws will fail the multi transaction. In this case, if the previous conditions<a name="line.1291"></a> |
| <span class="sourceLineNo">1292</span> * hold, the commands are run sequentially, which should result in the correct final state, but<a name="line.1292"></a> |
| <span class="sourceLineNo">1293</span> * means that the operations will not run atomically.<a name="line.1293"></a> |
| <span class="sourceLineNo">1294</span> * @throws KeeperException if a ZooKeeper operation fails<a name="line.1294"></a> |
| <span class="sourceLineNo">1295</span> */<a name="line.1295"></a> |
| <span class="sourceLineNo">1296</span> public static void multiOrSequential(ZKWatcher zkw, List<ZKUtilOp> ops,<a name="line.1296"></a> |
| <span class="sourceLineNo">1297</span> boolean runSequentialOnMultiFailure) throws KeeperException {<a name="line.1297"></a> |
| <span class="sourceLineNo">1298</span> if (ops == null) {<a name="line.1298"></a> |
| <span class="sourceLineNo">1299</span> return;<a name="line.1299"></a> |
| <span class="sourceLineNo">1300</span> }<a name="line.1300"></a> |
| <span class="sourceLineNo">1301</span> if (useMultiWarn) { // Only check and warn at first use<a name="line.1301"></a> |
| <span class="sourceLineNo">1302</span> if (zkw.getConfiguration().get("hbase.zookeeper.useMulti") != null) {<a name="line.1302"></a> |
| <span class="sourceLineNo">1303</span> LOG.warn("hbase.zookeeper.useMulti is deprecated. Default to true always.");<a name="line.1303"></a> |
| <span class="sourceLineNo">1304</span> }<a name="line.1304"></a> |
| <span class="sourceLineNo">1305</span> useMultiWarn = false;<a name="line.1305"></a> |
| <span class="sourceLineNo">1306</span> }<a name="line.1306"></a> |
| <span class="sourceLineNo">1307</span> List<Op> zkOps = new LinkedList<>();<a name="line.1307"></a> |
| <span class="sourceLineNo">1308</span> for (ZKUtilOp op : ops) {<a name="line.1308"></a> |
| <span class="sourceLineNo">1309</span> zkOps.add(toZooKeeperOp(zkw, op));<a name="line.1309"></a> |
| <span class="sourceLineNo">1310</span> }<a name="line.1310"></a> |
| <span class="sourceLineNo">1311</span> try {<a name="line.1311"></a> |
| <span class="sourceLineNo">1312</span> zkw.getRecoverableZooKeeper().multi(zkOps);<a name="line.1312"></a> |
| <span class="sourceLineNo">1313</span> } catch (KeeperException ke) {<a name="line.1313"></a> |
| <span class="sourceLineNo">1314</span> switch (ke.code()) {<a name="line.1314"></a> |
| <span class="sourceLineNo">1315</span> case NODEEXISTS:<a name="line.1315"></a> |
| <span class="sourceLineNo">1316</span> case NONODE:<a name="line.1316"></a> |
| <span class="sourceLineNo">1317</span> case BADVERSION:<a name="line.1317"></a> |
| <span class="sourceLineNo">1318</span> case NOAUTH:<a name="line.1318"></a> |
| <span class="sourceLineNo">1319</span> case NOTEMPTY:<a name="line.1319"></a> |
| <span class="sourceLineNo">1320</span> // if we get an exception that could be solved by running sequentially<a name="line.1320"></a> |
| <span class="sourceLineNo">1321</span> // (and the client asked us to), then break out and run sequentially<a name="line.1321"></a> |
| <span class="sourceLineNo">1322</span> if (runSequentialOnMultiFailure) {<a name="line.1322"></a> |
| <span class="sourceLineNo">1323</span> LOG.info(<a name="line.1323"></a> |
| <span class="sourceLineNo">1324</span> "multi exception: {}; running operations sequentially "<a name="line.1324"></a> |
| <span class="sourceLineNo">1325</span> + "(runSequentialOnMultiFailure=true); {}",<a name="line.1325"></a> |
| <span class="sourceLineNo">1326</span> ke.toString(), ops.stream().map(o -> o.toString()).collect(Collectors.joining(",")));<a name="line.1326"></a> |
| <span class="sourceLineNo">1327</span> processSequentially(zkw, ops);<a name="line.1327"></a> |
| <span class="sourceLineNo">1328</span> break;<a name="line.1328"></a> |
| <span class="sourceLineNo">1329</span> }<a name="line.1329"></a> |
| <span class="sourceLineNo">1330</span> default:<a name="line.1330"></a> |
| <span class="sourceLineNo">1331</span> throw ke;<a name="line.1331"></a> |
| <span class="sourceLineNo">1332</span> }<a name="line.1332"></a> |
| <span class="sourceLineNo">1333</span> } catch (InterruptedException ie) {<a name="line.1333"></a> |
| <span class="sourceLineNo">1334</span> zkw.interruptedException(ie);<a name="line.1334"></a> |
| <span class="sourceLineNo">1335</span> }<a name="line.1335"></a> |
| <span class="sourceLineNo">1336</span> }<a name="line.1336"></a> |
| <span class="sourceLineNo">1337</span><a name="line.1337"></a> |
| <span class="sourceLineNo">1338</span> private static void processSequentially(ZKWatcher zkw, List<ZKUtilOp> ops)<a name="line.1338"></a> |
| <span class="sourceLineNo">1339</span> throws KeeperException, NoNodeException {<a name="line.1339"></a> |
| <span class="sourceLineNo">1340</span> for (ZKUtilOp op : ops) {<a name="line.1340"></a> |
| <span class="sourceLineNo">1341</span> if (op instanceof CreateAndFailSilent) {<a name="line.1341"></a> |
| <span class="sourceLineNo">1342</span> createAndFailSilent(zkw, (CreateAndFailSilent) op);<a name="line.1342"></a> |
| <span class="sourceLineNo">1343</span> } else if (op instanceof DeleteNodeFailSilent) {<a name="line.1343"></a> |
| <span class="sourceLineNo">1344</span> deleteNodeFailSilent(zkw, (DeleteNodeFailSilent) op);<a name="line.1344"></a> |
| <span class="sourceLineNo">1345</span> } else if (op instanceof SetData) {<a name="line.1345"></a> |
| <span class="sourceLineNo">1346</span> setData(zkw, (SetData) op);<a name="line.1346"></a> |
| <span class="sourceLineNo">1347</span> } else {<a name="line.1347"></a> |
| <span class="sourceLineNo">1348</span> throw new UnsupportedOperationException(<a name="line.1348"></a> |
| <span class="sourceLineNo">1349</span> "Unexpected ZKUtilOp type: " + op.getClass().getName());<a name="line.1349"></a> |
| <span class="sourceLineNo">1350</span> }<a name="line.1350"></a> |
| <span class="sourceLineNo">1351</span> }<a name="line.1351"></a> |
| <span class="sourceLineNo">1352</span> }<a name="line.1352"></a> |
| <span class="sourceLineNo">1353</span><a name="line.1353"></a> |
| <span class="sourceLineNo">1354</span> //<a name="line.1354"></a> |
| <span class="sourceLineNo">1355</span> // ZooKeeper cluster information<a name="line.1355"></a> |
| <span class="sourceLineNo">1356</span> //<a name="line.1356"></a> |
| <span class="sourceLineNo">1357</span><a name="line.1357"></a> |
| <span class="sourceLineNo">1358</span> private static void logRetrievedMsg(final ZKWatcher zkw, final String znode, final byte[] data,<a name="line.1358"></a> |
| <span class="sourceLineNo">1359</span> final boolean watcherSet) {<a name="line.1359"></a> |
| <span class="sourceLineNo">1360</span> if (!LOG.isTraceEnabled()) {<a name="line.1360"></a> |
| <span class="sourceLineNo">1361</span> return;<a name="line.1361"></a> |
| <span class="sourceLineNo">1362</span> }<a name="line.1362"></a> |
| <span class="sourceLineNo">1363</span><a name="line.1363"></a> |
| <span class="sourceLineNo">1364</span> LOG.trace(zkw.prefix("Retrieved " + ((data == null) ? 0 : data.length)<a name="line.1364"></a> |
| <span class="sourceLineNo">1365</span> + " byte(s) of data from znode " + znode + (watcherSet ? " and set watcher; " : "; data=")<a name="line.1365"></a> |
| <span class="sourceLineNo">1366</span> + (data == null ? "null"<a name="line.1366"></a> |
| <span class="sourceLineNo">1367</span> : data.length == 0 ? "empty"<a name="line.1367"></a> |
| <span class="sourceLineNo">1368</span> : (zkw.getZNodePaths().isMetaZNodePath(znode) ? getServerNameOrEmptyString(data)<a name="line.1368"></a> |
| <span class="sourceLineNo">1369</span> : znode.startsWith(zkw.getZNodePaths().backupMasterAddressesZNode)<a name="line.1369"></a> |
| <span class="sourceLineNo">1370</span> ? getServerNameOrEmptyString(data)<a name="line.1370"></a> |
| <span class="sourceLineNo">1371</span> : StringUtils.abbreviate(Bytes.toStringBinary(data), 32)))));<a name="line.1371"></a> |
| <span class="sourceLineNo">1372</span> }<a name="line.1372"></a> |
| <span class="sourceLineNo">1373</span><a name="line.1373"></a> |
| <span class="sourceLineNo">1374</span> private static String getServerNameOrEmptyString(final byte[] data) {<a name="line.1374"></a> |
| <span class="sourceLineNo">1375</span> try {<a name="line.1375"></a> |
| <span class="sourceLineNo">1376</span> return ProtobufUtil.parseServerNameFrom(data).toString();<a name="line.1376"></a> |
| <span class="sourceLineNo">1377</span> } catch (DeserializationException e) {<a name="line.1377"></a> |
| <span class="sourceLineNo">1378</span> return "";<a name="line.1378"></a> |
| <span class="sourceLineNo">1379</span> }<a name="line.1379"></a> |
| <span class="sourceLineNo">1380</span> }<a name="line.1380"></a> |
| <span class="sourceLineNo">1381</span><a name="line.1381"></a> |
| <span class="sourceLineNo">1382</span> /**<a name="line.1382"></a> |
| <span class="sourceLineNo">1383</span> * Waits for HBase installation's base (parent) znode to become available.<a name="line.1383"></a> |
| <span class="sourceLineNo">1384</span> * @throws IOException on ZK errors<a name="line.1384"></a> |
| <span class="sourceLineNo">1385</span> */<a name="line.1385"></a> |
| <span class="sourceLineNo">1386</span> public static void waitForBaseZNode(Configuration conf) throws IOException {<a name="line.1386"></a> |
| <span class="sourceLineNo">1387</span> LOG.info("Waiting until the base znode is available");<a name="line.1387"></a> |
| <span class="sourceLineNo">1388</span> String parentZNode =<a name="line.1388"></a> |
| <span class="sourceLineNo">1389</span> conf.get(HConstants.ZOOKEEPER_ZNODE_PARENT, HConstants.DEFAULT_ZOOKEEPER_ZNODE_PARENT);<a name="line.1389"></a> |
| <span class="sourceLineNo">1390</span> ZooKeeper zk = new ZooKeeper(ZKConfig.getZKQuorumServersString(conf),<a name="line.1390"></a> |
| <span class="sourceLineNo">1391</span> conf.getInt(HConstants.ZK_SESSION_TIMEOUT, HConstants.DEFAULT_ZK_SESSION_TIMEOUT),<a name="line.1391"></a> |
| <span class="sourceLineNo">1392</span> EmptyWatcher.instance);<a name="line.1392"></a> |
| <span class="sourceLineNo">1393</span><a name="line.1393"></a> |
| <span class="sourceLineNo">1394</span> final int maxTimeMs = 10000;<a name="line.1394"></a> |
| <span class="sourceLineNo">1395</span> final int maxNumAttempts = maxTimeMs / HConstants.SOCKET_RETRY_WAIT_MS;<a name="line.1395"></a> |
| <span class="sourceLineNo">1396</span><a name="line.1396"></a> |
| <span class="sourceLineNo">1397</span> KeeperException keeperEx = null;<a name="line.1397"></a> |
| <span class="sourceLineNo">1398</span> try {<a name="line.1398"></a> |
| <span class="sourceLineNo">1399</span> try {<a name="line.1399"></a> |
| <span class="sourceLineNo">1400</span> for (int attempt = 0; attempt < maxNumAttempts; ++attempt) {<a name="line.1400"></a> |
| <span class="sourceLineNo">1401</span> try {<a name="line.1401"></a> |
| <span class="sourceLineNo">1402</span> if (zk.exists(parentZNode, false) != null) {<a name="line.1402"></a> |
| <span class="sourceLineNo">1403</span> LOG.info("Parent znode exists: {}", parentZNode);<a name="line.1403"></a> |
| <span class="sourceLineNo">1404</span> keeperEx = null;<a name="line.1404"></a> |
| <span class="sourceLineNo">1405</span> break;<a name="line.1405"></a> |
| <span class="sourceLineNo">1406</span> }<a name="line.1406"></a> |
| <span class="sourceLineNo">1407</span> } catch (KeeperException e) {<a name="line.1407"></a> |
| <span class="sourceLineNo">1408</span> keeperEx = e;<a name="line.1408"></a> |
| <span class="sourceLineNo">1409</span> }<a name="line.1409"></a> |
| <span class="sourceLineNo">1410</span> Threads.sleepWithoutInterrupt(HConstants.SOCKET_RETRY_WAIT_MS);<a name="line.1410"></a> |
| <span class="sourceLineNo">1411</span> }<a name="line.1411"></a> |
| <span class="sourceLineNo">1412</span> } finally {<a name="line.1412"></a> |
| <span class="sourceLineNo">1413</span> zk.close();<a name="line.1413"></a> |
| <span class="sourceLineNo">1414</span> }<a name="line.1414"></a> |
| <span class="sourceLineNo">1415</span> } catch (InterruptedException ex) {<a name="line.1415"></a> |
| <span class="sourceLineNo">1416</span> Thread.currentThread().interrupt();<a name="line.1416"></a> |
| <span class="sourceLineNo">1417</span> }<a name="line.1417"></a> |
| <span class="sourceLineNo">1418</span><a name="line.1418"></a> |
| <span class="sourceLineNo">1419</span> if (keeperEx != null) {<a name="line.1419"></a> |
| <span class="sourceLineNo">1420</span> throw new IOException(keeperEx);<a name="line.1420"></a> |
| <span class="sourceLineNo">1421</span> }<a name="line.1421"></a> |
| <span class="sourceLineNo">1422</span> }<a name="line.1422"></a> |
| <span class="sourceLineNo">1423</span><a name="line.1423"></a> |
| <span class="sourceLineNo">1424</span> /**<a name="line.1424"></a> |
| <span class="sourceLineNo">1425</span> * Convert a {@link DeserializationException} to a more palatable {@link KeeperException}. Used<a name="line.1425"></a> |
| <span class="sourceLineNo">1426</span> * when can't let a {@link DeserializationException} out w/o changing public API.<a name="line.1426"></a> |
| <span class="sourceLineNo">1427</span> * @param e Exception to convert<a name="line.1427"></a> |
| <span class="sourceLineNo">1428</span> * @return Converted exception<a name="line.1428"></a> |
| <span class="sourceLineNo">1429</span> */<a name="line.1429"></a> |
| <span class="sourceLineNo">1430</span> public static KeeperException convert(final DeserializationException e) {<a name="line.1430"></a> |
| <span class="sourceLineNo">1431</span> KeeperException ke = new KeeperException.DataInconsistencyException();<a name="line.1431"></a> |
| <span class="sourceLineNo">1432</span> ke.initCause(e);<a name="line.1432"></a> |
| <span class="sourceLineNo">1433</span> return ke;<a name="line.1433"></a> |
| <span class="sourceLineNo">1434</span> }<a name="line.1434"></a> |
| <span class="sourceLineNo">1435</span><a name="line.1435"></a> |
| <span class="sourceLineNo">1436</span> /**<a name="line.1436"></a> |
| <span class="sourceLineNo">1437</span> * Recursively print the current state of ZK (non-transactional)<a name="line.1437"></a> |
| <span class="sourceLineNo">1438</span> * @param root name of the root directory in zk to print<a name="line.1438"></a> |
| <span class="sourceLineNo">1439</span> */<a name="line.1439"></a> |
| <span class="sourceLineNo">1440</span> public static void logZKTree(ZKWatcher zkw, String root) {<a name="line.1440"></a> |
| <span class="sourceLineNo">1441</span> if (!LOG.isDebugEnabled()) {<a name="line.1441"></a> |
| <span class="sourceLineNo">1442</span> return;<a name="line.1442"></a> |
| <span class="sourceLineNo">1443</span> }<a name="line.1443"></a> |
| <span class="sourceLineNo">1444</span><a name="line.1444"></a> |
| <span class="sourceLineNo">1445</span> LOG.debug("Current zk system:");<a name="line.1445"></a> |
| <span class="sourceLineNo">1446</span> String prefix = "|-";<a name="line.1446"></a> |
| <span class="sourceLineNo">1447</span> LOG.debug(prefix + root);<a name="line.1447"></a> |
| <span class="sourceLineNo">1448</span> try {<a name="line.1448"></a> |
| <span class="sourceLineNo">1449</span> logZKTree(zkw, root, prefix);<a name="line.1449"></a> |
| <span class="sourceLineNo">1450</span> } catch (KeeperException e) {<a name="line.1450"></a> |
| <span class="sourceLineNo">1451</span> throw new RuntimeException(e);<a name="line.1451"></a> |
| <span class="sourceLineNo">1452</span> }<a name="line.1452"></a> |
| <span class="sourceLineNo">1453</span> }<a name="line.1453"></a> |
| <span class="sourceLineNo">1454</span><a name="line.1454"></a> |
| <span class="sourceLineNo">1455</span> /**<a name="line.1455"></a> |
| <span class="sourceLineNo">1456</span> * Helper method to print the current state of the ZK tree.<a name="line.1456"></a> |
| <span class="sourceLineNo">1457</span> * @see #logZKTree(ZKWatcher, String)<a name="line.1457"></a> |
| <span class="sourceLineNo">1458</span> * @throws KeeperException if an unexpected exception occurs<a name="line.1458"></a> |
| <span class="sourceLineNo">1459</span> */<a name="line.1459"></a> |
| <span class="sourceLineNo">1460</span> private static void logZKTree(ZKWatcher zkw, String root, String prefix) throws KeeperException {<a name="line.1460"></a> |
| <span class="sourceLineNo">1461</span> List<String> children = ZKUtil.listChildrenNoWatch(zkw, root);<a name="line.1461"></a> |
| <span class="sourceLineNo">1462</span><a name="line.1462"></a> |
| <span class="sourceLineNo">1463</span> if (children == null) {<a name="line.1463"></a> |
| <span class="sourceLineNo">1464</span> return;<a name="line.1464"></a> |
| <span class="sourceLineNo">1465</span> }<a name="line.1465"></a> |
| <span class="sourceLineNo">1466</span><a name="line.1466"></a> |
| <span class="sourceLineNo">1467</span> for (String child : children) {<a name="line.1467"></a> |
| <span class="sourceLineNo">1468</span> LOG.debug(prefix + child);<a name="line.1468"></a> |
| <span class="sourceLineNo">1469</span> String node = ZNodePaths.joinZNode(root.equals("/") ? "" : root, child);<a name="line.1469"></a> |
| <span class="sourceLineNo">1470</span> logZKTree(zkw, node, prefix + "---");<a name="line.1470"></a> |
| <span class="sourceLineNo">1471</span> }<a name="line.1471"></a> |
| <span class="sourceLineNo">1472</span> }<a name="line.1472"></a> |
| <span class="sourceLineNo">1473</span><a name="line.1473"></a> |
| <span class="sourceLineNo">1474</span> /**<a name="line.1474"></a> |
| <span class="sourceLineNo">1475</span> * @param position the position to serialize<a name="line.1475"></a> |
| <span class="sourceLineNo">1476</span> * @return Serialized protobuf of <code>position</code> with pb magic prefix prepended suitable<a name="line.1476"></a> |
| <span class="sourceLineNo">1477</span> * for use as content of an wal position in a replication queue.<a name="line.1477"></a> |
| <span class="sourceLineNo">1478</span> */<a name="line.1478"></a> |
| <span class="sourceLineNo">1479</span> public static byte[] positionToByteArray(final long position) {<a name="line.1479"></a> |
| <span class="sourceLineNo">1480</span> byte[] bytes = ReplicationProtos.ReplicationHLogPosition.newBuilder().setPosition(position)<a name="line.1480"></a> |
| <span class="sourceLineNo">1481</span> .build().toByteArray();<a name="line.1481"></a> |
| <span class="sourceLineNo">1482</span> return ProtobufUtil.prependPBMagic(bytes);<a name="line.1482"></a> |
| <span class="sourceLineNo">1483</span> }<a name="line.1483"></a> |
| <span class="sourceLineNo">1484</span><a name="line.1484"></a> |
| <span class="sourceLineNo">1485</span> /**<a name="line.1485"></a> |
| <span class="sourceLineNo">1486</span> * @param bytes - Content of a WAL position znode.<a name="line.1486"></a> |
| <span class="sourceLineNo">1487</span> * @return long - The current WAL position.<a name="line.1487"></a> |
| <span class="sourceLineNo">1488</span> * @throws DeserializationException if the WAL position cannot be parsed<a name="line.1488"></a> |
| <span class="sourceLineNo">1489</span> */<a name="line.1489"></a> |
| <span class="sourceLineNo">1490</span> public static long parseWALPositionFrom(final byte[] bytes) throws DeserializationException {<a name="line.1490"></a> |
| <span class="sourceLineNo">1491</span> if (bytes == null) {<a name="line.1491"></a> |
| <span class="sourceLineNo">1492</span> throw new DeserializationException("Unable to parse null WAL position.");<a name="line.1492"></a> |
| <span class="sourceLineNo">1493</span> }<a name="line.1493"></a> |
| <span class="sourceLineNo">1494</span> if (ProtobufUtil.isPBMagicPrefix(bytes)) {<a name="line.1494"></a> |
| <span class="sourceLineNo">1495</span> int pblen = ProtobufUtil.lengthOfPBMagic();<a name="line.1495"></a> |
| <span class="sourceLineNo">1496</span> ReplicationProtos.ReplicationHLogPosition.Builder builder =<a name="line.1496"></a> |
| <span class="sourceLineNo">1497</span> ReplicationProtos.ReplicationHLogPosition.newBuilder();<a name="line.1497"></a> |
| <span class="sourceLineNo">1498</span> ReplicationProtos.ReplicationHLogPosition position;<a name="line.1498"></a> |
| <span class="sourceLineNo">1499</span> try {<a name="line.1499"></a> |
| <span class="sourceLineNo">1500</span> ProtobufUtil.mergeFrom(builder, bytes, pblen, bytes.length - pblen);<a name="line.1500"></a> |
| <span class="sourceLineNo">1501</span> position = builder.build();<a name="line.1501"></a> |
| <span class="sourceLineNo">1502</span> } catch (IOException e) {<a name="line.1502"></a> |
| <span class="sourceLineNo">1503</span> throw new DeserializationException(e);<a name="line.1503"></a> |
| <span class="sourceLineNo">1504</span> }<a name="line.1504"></a> |
| <span class="sourceLineNo">1505</span> return position.getPosition();<a name="line.1505"></a> |
| <span class="sourceLineNo">1506</span> } else {<a name="line.1506"></a> |
| <span class="sourceLineNo">1507</span> if (bytes.length > 0) {<a name="line.1507"></a> |
| <span class="sourceLineNo">1508</span> return Bytes.toLong(bytes);<a name="line.1508"></a> |
| <span class="sourceLineNo">1509</span> }<a name="line.1509"></a> |
| <span class="sourceLineNo">1510</span> return 0;<a name="line.1510"></a> |
| <span class="sourceLineNo">1511</span> }<a name="line.1511"></a> |
| <span class="sourceLineNo">1512</span> }<a name="line.1512"></a> |
| <span class="sourceLineNo">1513</span>}<a name="line.1513"></a> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </body> |
| </html> |
