| <!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;<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.nio.charset.StandardCharsets;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.util.Threads;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.zookeeper.AsyncCallback;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.zookeeper.CreateMode;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.zookeeper.KeeperException;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.zookeeper.WatchedEvent;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.zookeeper.Watcher;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.zookeeper.ZooDefs;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.zookeeper.ZooKeeper;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.slf4j.Logger;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.slf4j.LoggerFactory;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span><a name="line.34"></a> |
| <span class="sourceLineNo">035</span>@InterfaceAudience.Private<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>public class ChaosZKClient {<a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span> private static final Logger LOG = LoggerFactory.getLogger(ChaosZKClient.class.getName());<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> private static final String CHAOS_AGENT_PARENT_ZNODE = "/hbase/chaosAgents";<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> private static final String CHAOS_AGENT_STATUS_ZNODE = "/hbase/chaosAgentTaskStatus";<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> private static final String ZNODE_PATH_SEPARATOR = "/";<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> private static final String TASK_PREFIX = "task_";<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> private static final String TASK_ERROR_STRING = "error";<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> private static final String TASK_COMPLETION_STRING = "done";<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> private static final String TASK_BOOLEAN_TRUE = "true";<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> private static final String TASK_BOOLEAN_FALSE = "false";<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> private static final String CONNECTION_LOSS = "ConnectionLoss";<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> private static final int SESSION_TIMEOUT_ZK = 10 * 60 * 1000;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> private static final int TASK_EXECUTION_TIMEOUT = 5 * 60 * 1000;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> private volatile String taskStatus = null;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span><a name="line.51"></a> |
| <span class="sourceLineNo">052</span> private final String quorum;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> private ZooKeeper zk;<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> public ChaosZKClient(String quorum) {<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> this.quorum = quorum;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> try {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> this.createNewZKConnection();<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> } catch (IOException e) {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> LOG.error("Error creating ZooKeeper Connection: ", e);<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> }<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> }<a name="line.62"></a> |
| <span class="sourceLineNo">063</span><a name="line.63"></a> |
| <span class="sourceLineNo">064</span> /**<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * Creates connection with ZooKeeper<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> * @throws IOException when not able to create connection properly<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> */<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> public void createNewZKConnection() throws IOException {<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> Watcher watcher = new Watcher() {<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> @Override<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> public void process(WatchedEvent watchedEvent) {<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> LOG.info("Created ZooKeeper Connection For executing task");<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><a name="line.75"></a> |
| <span class="sourceLineNo">076</span> this.zk = new ZooKeeper(quorum, SESSION_TIMEOUT_ZK, watcher);<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> }<a name="line.77"></a> |
| <span class="sourceLineNo">078</span><a name="line.78"></a> |
| <span class="sourceLineNo">079</span> /**<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * Checks if ChaosAgent is running or not on target host by checking its ZNode.<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * @param hostname hostname to check for chaosagent<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * @return true/false whether agent is running or not<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> */<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> private boolean isChaosAgentRunning(String hostname) {<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> try {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> return zk.exists(CHAOS_AGENT_PARENT_ZNODE + ZNODE_PATH_SEPARATOR + hostname, false) != null;<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> } catch (KeeperException e) {<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> if (e.toString().contains(CONNECTION_LOSS)) {<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> recreateZKConnection();<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> try {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> return zk.exists(CHAOS_AGENT_PARENT_ZNODE + ZNODE_PATH_SEPARATOR + hostname, false)<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> != null;<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> } catch (KeeperException | InterruptedException ie) {<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> LOG.error("ERROR ", ie);<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> } catch (InterruptedException e) {<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> LOG.error("Error checking for given hostname: {} ERROR: ", hostname, e);<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> }<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> return false;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> }<a name="line.101"></a> |
| <span class="sourceLineNo">102</span><a name="line.102"></a> |
| <span class="sourceLineNo">103</span> /**<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> * Creates tasks for target hosts by creating ZNodes. Waits for a limited amount of time to<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> * complete task to execute.<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> * @param taskObject Object data represents command<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> * @return returns status<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> */<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> public String submitTask(final TaskObject taskObject) {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> if (isChaosAgentRunning(taskObject.getTaskHostname())) {<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> LOG.info("Creating task node");<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> zk.create(<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> CHAOS_AGENT_STATUS_ZNODE + ZNODE_PATH_SEPARATOR + taskObject.getTaskHostname()<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> + ZNODE_PATH_SEPARATOR + TASK_PREFIX,<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> taskObject.getCommand().getBytes(StandardCharsets.UTF_8), ZooDefs.Ids.OPEN_ACL_UNSAFE,<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> CreateMode.EPHEMERAL_SEQUENTIAL, submitTaskCallback, taskObject);<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> long start = EnvironmentEdgeManager.currentTime();<a name="line.117"></a> |
| <span class="sourceLineNo">118</span><a name="line.118"></a> |
| <span class="sourceLineNo">119</span> while ((EnvironmentEdgeManager.currentTime() - start) < TASK_EXECUTION_TIMEOUT) {<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> if (taskStatus != null) {<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> return taskStatus;<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> }<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> Threads.sleep(500);<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> } else {<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> LOG.info("EHHHHH! ChaosAgent Not running");<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> }<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> return TASK_ERROR_STRING;<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> }<a name="line.129"></a> |
| <span class="sourceLineNo">130</span><a name="line.130"></a> |
| <span class="sourceLineNo">131</span> /**<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> * To get status of task submitted<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> * @param path path at which to get status<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> * @param ctx path context<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> */<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> private void getStatus(String path, Object ctx) {<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> LOG.info("Getting Status of task: " + path);<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> zk.getData(path, false, getStatusCallback, ctx);<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> }<a name="line.139"></a> |
| <span class="sourceLineNo">140</span><a name="line.140"></a> |
| <span class="sourceLineNo">141</span> /**<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> * Set a watch on task submitted<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> * @param name ZNode name to set a watch<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> * @param taskObject context for ZNode name<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> */<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> private void setStatusWatch(String name, TaskObject taskObject) {<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> LOG.info("Checking for ZNode and Setting watch for task : " + name);<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> zk.exists(name, setStatusWatcher, setStatusWatchCallback, taskObject);<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> }<a name="line.149"></a> |
| <span class="sourceLineNo">150</span><a name="line.150"></a> |
| <span class="sourceLineNo">151</span> /**<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> * Delete task after getting its status<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> * @param path path to delete ZNode<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> */<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> private void deleteTask(String path) {<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> LOG.info("Deleting task: " + path);<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> zk.delete(path, -1, taskDeleteCallback, null);<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> }<a name="line.158"></a> |
| <span class="sourceLineNo">159</span><a name="line.159"></a> |
| <span class="sourceLineNo">160</span> // WATCHERS:<a name="line.160"></a> |
| <span class="sourceLineNo">161</span><a name="line.161"></a> |
| <span class="sourceLineNo">162</span> /**<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> * Watcher to get notification whenever status of task changes.<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> */<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> Watcher setStatusWatcher = new Watcher() {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> @Override<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> public void process(WatchedEvent watchedEvent) {<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> LOG.info("Setting status watch for task: " + watchedEvent.getPath());<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> if (watchedEvent.getType() == Event.EventType.NodeDataChanged) {<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> if (!watchedEvent.getPath().contains(TASK_PREFIX)) {<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> throw new RuntimeException(<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> KeeperException.create(KeeperException.Code.DATAINCONSISTENCY));<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> }<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> getStatus(watchedEvent.getPath(), (Object) watchedEvent.getPath());<a name="line.174"></a> |
| <span class="sourceLineNo">175</span><a name="line.175"></a> |
| <span class="sourceLineNo">176</span> }<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> }<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> };<a name="line.178"></a> |
| <span class="sourceLineNo">179</span><a name="line.179"></a> |
| <span class="sourceLineNo">180</span> // CALLBACKS<a name="line.180"></a> |
| <span class="sourceLineNo">181</span><a name="line.181"></a> |
| <span class="sourceLineNo">182</span> AsyncCallback.DataCallback getStatusCallback = (rc, path, ctx, data, stat) -> {<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> switch (KeeperException.Code.get(rc)) {<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> case CONNECTIONLOSS:<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> // Connectionloss while getting status of task, getting again<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> recreateZKConnection();<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> getStatus(path, ctx);<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> break;<a name="line.188"></a> |
| <span class="sourceLineNo">189</span><a name="line.189"></a> |
| <span class="sourceLineNo">190</span> case OK:<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> if (ctx != null) {<a name="line.191"></a> |
| <span class="sourceLineNo">192</span><a name="line.192"></a> |
| <span class="sourceLineNo">193</span> String status = new String(data, StandardCharsets.UTF_8);<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> taskStatus = status;<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> switch (status) {<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> case TASK_COMPLETION_STRING:<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> case TASK_BOOLEAN_TRUE:<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> case TASK_BOOLEAN_FALSE:<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> LOG.info("Task executed completely : Status --> " + status);<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> break;<a name="line.200"></a> |
| <span class="sourceLineNo">201</span><a name="line.201"></a> |
| <span class="sourceLineNo">202</span> case TASK_ERROR_STRING:<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> LOG.info("There was error while executing task : Status --> " + status);<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> break;<a name="line.204"></a> |
| <span class="sourceLineNo">205</span><a name="line.205"></a> |
| <span class="sourceLineNo">206</span> default:<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> LOG.warn("Status of task is undefined!! : Status --> " + status);<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> }<a name="line.208"></a> |
| <span class="sourceLineNo">209</span><a name="line.209"></a> |
| <span class="sourceLineNo">210</span> deleteTask(path);<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> }<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> break;<a name="line.212"></a> |
| <span class="sourceLineNo">213</span><a name="line.213"></a> |
| <span class="sourceLineNo">214</span> default:<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> LOG.error("ERROR while getting status of task: " + path + " ERROR: "<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> + KeeperException.create(KeeperException.Code.get(rc)));<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> }<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> };<a name="line.218"></a> |
| <span class="sourceLineNo">219</span><a name="line.219"></a> |
| <span class="sourceLineNo">220</span> AsyncCallback.StatCallback setStatusWatchCallback = (rc, path, ctx, stat) -> {<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> switch (KeeperException.Code.get(rc)) {<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> case CONNECTIONLOSS:<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> // ConnectionLoss while setting watch on status ZNode, setting again.<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> recreateZKConnection();<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> setStatusWatch(path, (TaskObject) ctx);<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> break;<a name="line.226"></a> |
| <span class="sourceLineNo">227</span><a name="line.227"></a> |
| <span class="sourceLineNo">228</span> case OK:<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> if (stat != null) {<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> getStatus(path, null);<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> }<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> break;<a name="line.232"></a> |
| <span class="sourceLineNo">233</span><a name="line.233"></a> |
| <span class="sourceLineNo">234</span> default:<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> LOG.error("ERROR while setting watch on task ZNode: " + path + " ERROR: "<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> + KeeperException.create(KeeperException.Code.get(rc)));<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> }<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> };<a name="line.238"></a> |
| <span class="sourceLineNo">239</span><a name="line.239"></a> |
| <span class="sourceLineNo">240</span> AsyncCallback.StringCallback submitTaskCallback = (rc, path, ctx, name) -> {<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> switch (KeeperException.Code.get(rc)) {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> case CONNECTIONLOSS:<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> // Connection to server was lost while submitting task, submitting again.<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> recreateZKConnection();<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> submitTask((TaskObject) ctx);<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> break;<a name="line.246"></a> |
| <span class="sourceLineNo">247</span><a name="line.247"></a> |
| <span class="sourceLineNo">248</span> case OK:<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> LOG.info("Task created : " + name);<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> setStatusWatch(name, (TaskObject) ctx);<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> break;<a name="line.251"></a> |
| <span class="sourceLineNo">252</span><a name="line.252"></a> |
| <span class="sourceLineNo">253</span> default:<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> LOG.error("Error submitting task: " + name + " ERROR:"<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> + KeeperException.create(KeeperException.Code.get(rc)));<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> }<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> };<a name="line.257"></a> |
| <span class="sourceLineNo">258</span><a name="line.258"></a> |
| <span class="sourceLineNo">259</span> AsyncCallback.VoidCallback taskDeleteCallback = new AsyncCallback.VoidCallback() {<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> @Override<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> public void processResult(int rc, String path, Object ctx) {<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> switch (KeeperException.Code.get(rc)) {<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> case CONNECTIONLOSS:<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> // Connectionloss while deleting task, deleting again<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> recreateZKConnection();<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> deleteTask(path);<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> break;<a name="line.267"></a> |
| <span class="sourceLineNo">268</span><a name="line.268"></a> |
| <span class="sourceLineNo">269</span> case OK:<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> LOG.info("Task Deleted successfully!");<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> LOG.info("Closing ZooKeeper Connection");<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> try {<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> zk.close();<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> } catch (InterruptedException e) {<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> LOG.error("Error while closing ZooKeeper Connection.");<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> }<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> break;<a name="line.277"></a> |
| <span class="sourceLineNo">278</span><a name="line.278"></a> |
| <span class="sourceLineNo">279</span> default:<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> LOG.error("ERROR while deleting task: " + path + " ERROR: "<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> + KeeperException.create(KeeperException.Code.get(rc)));<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> }<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> }<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> };<a name="line.284"></a> |
| <span class="sourceLineNo">285</span><a name="line.285"></a> |
| <span class="sourceLineNo">286</span> private void recreateZKConnection() {<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> try {<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> zk.close();<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> } catch (InterruptedException e) {<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> LOG.error("Error closing ZK connection : ", e);<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> } finally {<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> try {<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> createNewZKConnection();<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> } catch (IOException e) {<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> LOG.error("Error creating new ZK COnnection for agent: ", e);<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> }<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> }<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> }<a name="line.298"></a> |
| <span class="sourceLineNo">299</span><a name="line.299"></a> |
| <span class="sourceLineNo">300</span> static class TaskObject {<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> private final String command;<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> private final String taskHostname;<a name="line.302"></a> |
| <span class="sourceLineNo">303</span><a name="line.303"></a> |
| <span class="sourceLineNo">304</span> public TaskObject(String command, String taskHostname) {<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> this.command = command;<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> this.taskHostname = taskHostname;<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> }<a name="line.307"></a> |
| <span class="sourceLineNo">308</span><a name="line.308"></a> |
| <span class="sourceLineNo">309</span> public String getCommand() {<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> return this.command;<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> }<a name="line.311"></a> |
| <span class="sourceLineNo">312</span><a name="line.312"></a> |
| <span class="sourceLineNo">313</span> public String getTaskHostname() {<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> return taskHostname;<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> }<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> }<a name="line.316"></a> |
| <span class="sourceLineNo">317</span><a name="line.317"></a> |
| <span class="sourceLineNo">318</span>}<a name="line.318"></a> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </body> |
| </html> |
