hbase-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From git-site-r...@apache.org
Subject [15/51] [partial] hbase-site git commit: Published site at 82d554e3783372cc6b05489452c815b57c06f6cd.
Date Fri, 19 May 2017 14:59:01 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c635e71b/devapidocs/src-html/org/apache/hadoop/hbase/zookeeper/ZKUtil.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/zookeeper/ZKUtil.html b/devapidocs/src-html/org/apache/hadoop/hbase/zookeeper/ZKUtil.html
index bc14b2e..547dec5 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/zookeeper/ZKUtil.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/zookeeper/ZKUtil.html
@@ -139,2012 +139,2013 @@
 <span class="sourceLineNo">131</span>    int retry = conf.getInt("zookeeper.recovery.retry", 3);<a name="line.131"></a>
 <span class="sourceLineNo">132</span>    int retryIntervalMillis =<a name="line.132"></a>
 <span class="sourceLineNo">133</span>      conf.getInt("zookeeper.recovery.retry.intervalmill", 1000);<a name="line.133"></a>
-<span class="sourceLineNo">134</span>    zkDumpConnectionTimeOut = conf.getInt("zookeeper.dump.connection.timeout",<a name="line.134"></a>
-<span class="sourceLineNo">135</span>        1000);<a name="line.135"></a>
-<span class="sourceLineNo">136</span>    return new RecoverableZooKeeper(ensemble, timeout, watcher,<a name="line.136"></a>
-<span class="sourceLineNo">137</span>        retry, retryIntervalMillis, identifier);<a name="line.137"></a>
-<span class="sourceLineNo">138</span>  }<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>   * Log in the current zookeeper server process using the given configuration<a name="line.141"></a>
-<span class="sourceLineNo">142</span>   * keys for the credential file and login principal.<a name="line.142"></a>
-<span class="sourceLineNo">143</span>   *<a name="line.143"></a>
-<span class="sourceLineNo">144</span>   * &lt;p&gt;&lt;strong&gt;This is only applicable when running on secure hbase&lt;/strong&gt;<a name="line.144"></a>
-<span class="sourceLineNo">145</span>   * On regular HBase (without security features), this will safely be ignored.<a name="line.145"></a>
-<span class="sourceLineNo">146</span>   * &lt;/p&gt;<a name="line.146"></a>
-<span class="sourceLineNo">147</span>   *<a name="line.147"></a>
-<span class="sourceLineNo">148</span>   * @param conf The configuration data to use<a name="line.148"></a>
-<span class="sourceLineNo">149</span>   * @param keytabFileKey Property key used to configure the path to the credential file<a name="line.149"></a>
-<span class="sourceLineNo">150</span>   * @param userNameKey Property key used to configure the login principal<a name="line.150"></a>
-<span class="sourceLineNo">151</span>   * @param hostname Current hostname to use in any credentials<a name="line.151"></a>
-<span class="sourceLineNo">152</span>   * @throws IOException underlying exception from SecurityUtil.login() call<a name="line.152"></a>
-<span class="sourceLineNo">153</span>   */<a name="line.153"></a>
-<span class="sourceLineNo">154</span>  public static void loginServer(Configuration conf, String keytabFileKey,<a name="line.154"></a>
-<span class="sourceLineNo">155</span>      String userNameKey, String hostname) throws IOException {<a name="line.155"></a>
-<span class="sourceLineNo">156</span>    login(conf, keytabFileKey, userNameKey, hostname,<a name="line.156"></a>
-<span class="sourceLineNo">157</span>          ZooKeeperSaslServer.LOGIN_CONTEXT_NAME_KEY,<a name="line.157"></a>
-<span class="sourceLineNo">158</span>          JaasConfiguration.SERVER_KEYTAB_KERBEROS_CONFIG_NAME);<a name="line.158"></a>
-<span class="sourceLineNo">159</span>  }<a name="line.159"></a>
-<span class="sourceLineNo">160</span><a name="line.160"></a>
-<span class="sourceLineNo">161</span>  /**<a name="line.161"></a>
-<span class="sourceLineNo">162</span>   * Log in the current zookeeper client using the given configuration<a name="line.162"></a>
-<span class="sourceLineNo">163</span>   * keys for the credential file and login principal.<a name="line.163"></a>
-<span class="sourceLineNo">164</span>   *<a name="line.164"></a>
-<span class="sourceLineNo">165</span>   * &lt;p&gt;&lt;strong&gt;This is only applicable when running on secure hbase&lt;/strong&gt;<a name="line.165"></a>
-<span class="sourceLineNo">166</span>   * On regular HBase (without security features), this will safely be ignored.<a name="line.166"></a>
-<span class="sourceLineNo">167</span>   * &lt;/p&gt;<a name="line.167"></a>
-<span class="sourceLineNo">168</span>   *<a name="line.168"></a>
-<span class="sourceLineNo">169</span>   * @param conf The configuration data to use<a name="line.169"></a>
-<span class="sourceLineNo">170</span>   * @param keytabFileKey Property key used to configure the path to the credential file<a name="line.170"></a>
-<span class="sourceLineNo">171</span>   * @param userNameKey Property key used to configure the login principal<a name="line.171"></a>
-<span class="sourceLineNo">172</span>   * @param hostname Current hostname to use in any credentials<a name="line.172"></a>
-<span class="sourceLineNo">173</span>   * @throws IOException underlying exception from SecurityUtil.login() call<a name="line.173"></a>
-<span class="sourceLineNo">174</span>   */<a name="line.174"></a>
-<span class="sourceLineNo">175</span>  public static void loginClient(Configuration conf, String keytabFileKey,<a name="line.175"></a>
-<span class="sourceLineNo">176</span>      String userNameKey, String hostname) throws IOException {<a name="line.176"></a>
-<span class="sourceLineNo">177</span>    login(conf, keytabFileKey, userNameKey, hostname,<a name="line.177"></a>
-<span class="sourceLineNo">178</span>          ZooKeeperSaslClient.LOGIN_CONTEXT_NAME_KEY,<a name="line.178"></a>
-<span class="sourceLineNo">179</span>          JaasConfiguration.CLIENT_KEYTAB_KERBEROS_CONFIG_NAME);<a name="line.179"></a>
-<span class="sourceLineNo">180</span>  }<a name="line.180"></a>
-<span class="sourceLineNo">181</span><a name="line.181"></a>
-<span class="sourceLineNo">182</span>  /**<a name="line.182"></a>
-<span class="sourceLineNo">183</span>   * Log in the current process using the given configuration keys for the<a name="line.183"></a>
-<span class="sourceLineNo">184</span>   * credential file and login principal.<a name="line.184"></a>
-<span class="sourceLineNo">185</span>   *<a name="line.185"></a>
-<span class="sourceLineNo">186</span>   * &lt;p&gt;&lt;strong&gt;This is only applicable when running on secure hbase&lt;/strong&gt;<a name="line.186"></a>
-<span class="sourceLineNo">187</span>   * On regular HBase (without security features), this will safely be ignored.<a name="line.187"></a>
-<span class="sourceLineNo">188</span>   * &lt;/p&gt;<a name="line.188"></a>
-<span class="sourceLineNo">189</span>   *<a name="line.189"></a>
-<span class="sourceLineNo">190</span>   * @param conf The configuration data to use<a name="line.190"></a>
-<span class="sourceLineNo">191</span>   * @param keytabFileKey Property key used to configure the path to the credential file<a name="line.191"></a>
-<span class="sourceLineNo">192</span>   * @param userNameKey Property key used to configure the login principal<a name="line.192"></a>
-<span class="sourceLineNo">193</span>   * @param hostname Current hostname to use in any credentials<a name="line.193"></a>
-<span class="sourceLineNo">194</span>   * @param loginContextProperty property name to expose the entry name<a name="line.194"></a>
-<span class="sourceLineNo">195</span>   * @param loginContextName jaas entry name<a name="line.195"></a>
-<span class="sourceLineNo">196</span>   * @throws IOException underlying exception from SecurityUtil.login() call<a name="line.196"></a>
-<span class="sourceLineNo">197</span>   */<a name="line.197"></a>
-<span class="sourceLineNo">198</span>  private static void login(Configuration conf, String keytabFileKey,<a name="line.198"></a>
-<span class="sourceLineNo">199</span>      String userNameKey, String hostname,<a name="line.199"></a>
-<span class="sourceLineNo">200</span>      String loginContextProperty, String loginContextName)<a name="line.200"></a>
-<span class="sourceLineNo">201</span>      throws IOException {<a name="line.201"></a>
-<span class="sourceLineNo">202</span>    if (!isSecureZooKeeper(conf))<a name="line.202"></a>
-<span class="sourceLineNo">203</span>      return;<a name="line.203"></a>
-<span class="sourceLineNo">204</span><a name="line.204"></a>
-<span class="sourceLineNo">205</span>    // User has specified a jaas.conf, keep this one as the good one.<a name="line.205"></a>
-<span class="sourceLineNo">206</span>    // HBASE_OPTS="-Djava.security.auth.login.config=jaas.conf"<a name="line.206"></a>
-<span class="sourceLineNo">207</span>    if (System.getProperty("java.security.auth.login.config") != null)<a name="line.207"></a>
-<span class="sourceLineNo">208</span>      return;<a name="line.208"></a>
-<span class="sourceLineNo">209</span><a name="line.209"></a>
-<span class="sourceLineNo">210</span>    // No keytab specified, no auth<a name="line.210"></a>
-<span class="sourceLineNo">211</span>    String keytabFilename = conf.get(keytabFileKey);<a name="line.211"></a>
-<span class="sourceLineNo">212</span>    if (keytabFilename == null) {<a name="line.212"></a>
-<span class="sourceLineNo">213</span>      LOG.warn("no keytab specified for: " + keytabFileKey);<a name="line.213"></a>
-<span class="sourceLineNo">214</span>      return;<a name="line.214"></a>
-<span class="sourceLineNo">215</span>    }<a name="line.215"></a>
-<span class="sourceLineNo">216</span><a name="line.216"></a>
-<span class="sourceLineNo">217</span>    String principalConfig = conf.get(userNameKey, System.getProperty("user.name"));<a name="line.217"></a>
-<span class="sourceLineNo">218</span>    String principalName = SecurityUtil.getServerPrincipal(principalConfig, hostname);<a name="line.218"></a>
-<span class="sourceLineNo">219</span><a name="line.219"></a>
-<span class="sourceLineNo">220</span>    // Initialize the "jaas.conf" for keyTab/principal,<a name="line.220"></a>
-<span class="sourceLineNo">221</span>    // If keyTab is not specified use the Ticket Cache.<a name="line.221"></a>
-<span class="sourceLineNo">222</span>    // and set the zookeeper login context name.<a name="line.222"></a>
-<span class="sourceLineNo">223</span>    JaasConfiguration jaasConf = new JaasConfiguration(loginContextName,<a name="line.223"></a>
-<span class="sourceLineNo">224</span>        principalName, keytabFilename);<a name="line.224"></a>
-<span class="sourceLineNo">225</span>    javax.security.auth.login.Configuration.setConfiguration(jaasConf);<a name="line.225"></a>
-<span class="sourceLineNo">226</span>    System.setProperty(loginContextProperty, loginContextName);<a name="line.226"></a>
-<span class="sourceLineNo">227</span>  }<a name="line.227"></a>
-<span class="sourceLineNo">228</span><a name="line.228"></a>
-<span class="sourceLineNo">229</span>  /**<a name="line.229"></a>
-<span class="sourceLineNo">230</span>   * A JAAS configuration that defines the login modules that we want to use for login.<a name="line.230"></a>
-<span class="sourceLineNo">231</span>   */<a name="line.231"></a>
-<span class="sourceLineNo">232</span>  private static class JaasConfiguration extends javax.security.auth.login.Configuration {<a name="line.232"></a>
-<span class="sourceLineNo">233</span>    private static final String SERVER_KEYTAB_KERBEROS_CONFIG_NAME =<a name="line.233"></a>
-<span class="sourceLineNo">234</span>      "zookeeper-server-keytab-kerberos";<a name="line.234"></a>
-<span class="sourceLineNo">235</span>    private static final String CLIENT_KEYTAB_KERBEROS_CONFIG_NAME =<a name="line.235"></a>
-<span class="sourceLineNo">236</span>      "zookeeper-client-keytab-kerberos";<a name="line.236"></a>
-<span class="sourceLineNo">237</span><a name="line.237"></a>
-<span class="sourceLineNo">238</span>    private static final Map&lt;String, String&gt; BASIC_JAAS_OPTIONS = new HashMap&lt;&gt;();<a name="line.238"></a>
-<span class="sourceLineNo">239</span>    static {<a name="line.239"></a>
-<span class="sourceLineNo">240</span>      String jaasEnvVar = System.getenv("HBASE_JAAS_DEBUG");<a name="line.240"></a>
-<span class="sourceLineNo">241</span>      if (jaasEnvVar != null &amp;&amp; "true".equalsIgnoreCase(jaasEnvVar)) {<a name="line.241"></a>
-<span class="sourceLineNo">242</span>        BASIC_JAAS_OPTIONS.put("debug", "true");<a name="line.242"></a>
-<span class="sourceLineNo">243</span>      }<a name="line.243"></a>
-<span class="sourceLineNo">244</span>    }<a name="line.244"></a>
-<span class="sourceLineNo">245</span><a name="line.245"></a>
-<span class="sourceLineNo">246</span>    private static final Map&lt;String,String&gt; KEYTAB_KERBEROS_OPTIONS = new HashMap&lt;&gt;();<a name="line.246"></a>
-<span class="sourceLineNo">247</span>    static {<a name="line.247"></a>
-<span class="sourceLineNo">248</span>      KEYTAB_KERBEROS_OPTIONS.put("doNotPrompt", "true");<a name="line.248"></a>
-<span class="sourceLineNo">249</span>      KEYTAB_KERBEROS_OPTIONS.put("storeKey", "true");<a name="line.249"></a>
-<span class="sourceLineNo">250</span>      KEYTAB_KERBEROS_OPTIONS.put("refreshKrb5Config", "true");<a name="line.250"></a>
-<span class="sourceLineNo">251</span>      KEYTAB_KERBEROS_OPTIONS.putAll(BASIC_JAAS_OPTIONS);<a name="line.251"></a>
-<span class="sourceLineNo">252</span>    }<a name="line.252"></a>
-<span class="sourceLineNo">253</span><a name="line.253"></a>
-<span class="sourceLineNo">254</span>    private static final AppConfigurationEntry KEYTAB_KERBEROS_LOGIN =<a name="line.254"></a>
-<span class="sourceLineNo">255</span>      new AppConfigurationEntry(KerberosUtil.getKrb5LoginModuleName(),<a name="line.255"></a>
-<span class="sourceLineNo">256</span>                                LoginModuleControlFlag.REQUIRED,<a name="line.256"></a>
-<span class="sourceLineNo">257</span>                                KEYTAB_KERBEROS_OPTIONS);<a name="line.257"></a>
-<span class="sourceLineNo">258</span><a name="line.258"></a>
-<span class="sourceLineNo">259</span>    private static final AppConfigurationEntry[] KEYTAB_KERBEROS_CONF =<a name="line.259"></a>
-<span class="sourceLineNo">260</span>      new AppConfigurationEntry[]{KEYTAB_KERBEROS_LOGIN};<a name="line.260"></a>
-<span class="sourceLineNo">261</span><a name="line.261"></a>
-<span class="sourceLineNo">262</span>    private javax.security.auth.login.Configuration baseConfig;<a name="line.262"></a>
-<span class="sourceLineNo">263</span>    private final String loginContextName;<a name="line.263"></a>
-<span class="sourceLineNo">264</span>    private final boolean useTicketCache;<a name="line.264"></a>
-<span class="sourceLineNo">265</span>    private final String keytabFile;<a name="line.265"></a>
-<span class="sourceLineNo">266</span>    private final String principal;<a name="line.266"></a>
-<span class="sourceLineNo">267</span><a name="line.267"></a>
-<span class="sourceLineNo">268</span>    public JaasConfiguration(String loginContextName, String principal, String keytabFile) {<a name="line.268"></a>
-<span class="sourceLineNo">269</span>      this(loginContextName, principal, keytabFile, keytabFile == null || keytabFile.length() == 0);<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>    private JaasConfiguration(String loginContextName, String principal,<a name="line.272"></a>
-<span class="sourceLineNo">273</span>                             String keytabFile, boolean useTicketCache) {<a name="line.273"></a>
-<span class="sourceLineNo">274</span>      try {<a name="line.274"></a>
-<span class="sourceLineNo">275</span>        this.baseConfig = javax.security.auth.login.Configuration.getConfiguration();<a name="line.275"></a>
-<span class="sourceLineNo">276</span>      } catch (SecurityException e) {<a name="line.276"></a>
-<span class="sourceLineNo">277</span>        this.baseConfig = null;<a name="line.277"></a>
-<span class="sourceLineNo">278</span>      }<a name="line.278"></a>
-<span class="sourceLineNo">279</span>      this.loginContextName = loginContextName;<a name="line.279"></a>
-<span class="sourceLineNo">280</span>      this.useTicketCache = useTicketCache;<a name="line.280"></a>
-<span class="sourceLineNo">281</span>      this.keytabFile = keytabFile;<a name="line.281"></a>
-<span class="sourceLineNo">282</span>      this.principal = principal;<a name="line.282"></a>
-<span class="sourceLineNo">283</span>      LOG.info("JaasConfiguration loginContextName=" + loginContextName +<a name="line.283"></a>
-<span class="sourceLineNo">284</span>               " principal=" + principal + " useTicketCache=" + useTicketCache +<a name="line.284"></a>
-<span class="sourceLineNo">285</span>               " keytabFile=" + keytabFile);<a name="line.285"></a>
-<span class="sourceLineNo">286</span>    }<a name="line.286"></a>
-<span class="sourceLineNo">287</span><a name="line.287"></a>
-<span class="sourceLineNo">288</span>    @Override<a name="line.288"></a>
-<span class="sourceLineNo">289</span>    public AppConfigurationEntry[] getAppConfigurationEntry(String appName) {<a name="line.289"></a>
-<span class="sourceLineNo">290</span>      if (loginContextName.equals(appName)) {<a name="line.290"></a>
-<span class="sourceLineNo">291</span>        if (!useTicketCache) {<a name="line.291"></a>
-<span class="sourceLineNo">292</span>          KEYTAB_KERBEROS_OPTIONS.put("keyTab", keytabFile);<a name="line.292"></a>
-<span class="sourceLineNo">293</span>          KEYTAB_KERBEROS_OPTIONS.put("useKeyTab", "true");<a name="line.293"></a>
-<span class="sourceLineNo">294</span>        }<a name="line.294"></a>
-<span class="sourceLineNo">295</span>        KEYTAB_KERBEROS_OPTIONS.put("principal", principal);<a name="line.295"></a>
-<span class="sourceLineNo">296</span>        KEYTAB_KERBEROS_OPTIONS.put("useTicketCache", useTicketCache ? "true" : "false");<a name="line.296"></a>
-<span class="sourceLineNo">297</span>        return KEYTAB_KERBEROS_CONF;<a name="line.297"></a>
-<span class="sourceLineNo">298</span>      }<a name="line.298"></a>
-<span class="sourceLineNo">299</span>      if (baseConfig != null) return baseConfig.getAppConfigurationEntry(appName);<a name="line.299"></a>
-<span class="sourceLineNo">300</span>      return(null);<a name="line.300"></a>
-<span class="sourceLineNo">301</span>    }<a name="line.301"></a>
-<span class="sourceLineNo">302</span>  }<a name="line.302"></a>
-<span class="sourceLineNo">303</span><a name="line.303"></a>
-<span class="sourceLineNo">304</span>  //<a name="line.304"></a>
-<span class="sourceLineNo">305</span>  // Helper methods<a name="line.305"></a>
-<span class="sourceLineNo">306</span>  //<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>   * Join the prefix znode name with the suffix znode name to generate a proper<a name="line.309"></a>
-<span class="sourceLineNo">310</span>   * full znode name.<a name="line.310"></a>
-<span class="sourceLineNo">311</span>   *<a name="line.311"></a>
-<span class="sourceLineNo">312</span>   * Assumes prefix does not end with slash and suffix does not begin with it.<a name="line.312"></a>
-<span class="sourceLineNo">313</span>   *<a name="line.313"></a>
-<span class="sourceLineNo">314</span>   * @param prefix beginning of znode name<a name="line.314"></a>
-<span class="sourceLineNo">315</span>   * @param suffix ending of znode name<a name="line.315"></a>
-<span class="sourceLineNo">316</span>   * @return result of properly joining prefix with suffix<a name="line.316"></a>
-<span class="sourceLineNo">317</span>   */<a name="line.317"></a>
-<span class="sourceLineNo">318</span>  public static String joinZNode(String prefix, String suffix) {<a name="line.318"></a>
-<span class="sourceLineNo">319</span>    return prefix + ZNODE_PATH_SEPARATOR + suffix;<a name="line.319"></a>
-<span class="sourceLineNo">320</span>  }<a name="line.320"></a>
-<span class="sourceLineNo">321</span><a name="line.321"></a>
-<span class="sourceLineNo">322</span>  /**<a name="line.322"></a>
-<span class="sourceLineNo">323</span>   * Returns the full path of the immediate parent of the specified node.<a name="line.323"></a>
-<span class="sourceLineNo">324</span>   * @param node path to get parent of<a name="line.324"></a>
-<span class="sourceLineNo">325</span>   * @return parent of path, null if passed the root node or an invalid node<a name="line.325"></a>
-<span class="sourceLineNo">326</span>   */<a name="line.326"></a>
-<span class="sourceLineNo">327</span>  public static String getParent(String node) {<a name="line.327"></a>
-<span class="sourceLineNo">328</span>    int idx = node.lastIndexOf(ZNODE_PATH_SEPARATOR);<a name="line.328"></a>
-<span class="sourceLineNo">329</span>    return idx &lt;= 0 ? null : node.substring(0, idx);<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>   * Get the name of the current node from the specified fully-qualified path.<a name="line.333"></a>
-<span class="sourceLineNo">334</span>   * @param path fully-qualified path<a name="line.334"></a>
-<span class="sourceLineNo">335</span>   * @return name of the current node<a name="line.335"></a>
-<span class="sourceLineNo">336</span>   */<a name="line.336"></a>
-<span class="sourceLineNo">337</span>  public static String getNodeName(String path) {<a name="line.337"></a>
-<span class="sourceLineNo">338</span>    return path.substring(path.lastIndexOf("/")+1);<a name="line.338"></a>
-<span class="sourceLineNo">339</span>  }<a name="line.339"></a>
-<span class="sourceLineNo">340</span><a name="line.340"></a>
-<span class="sourceLineNo">341</span>  //<a name="line.341"></a>
-<span class="sourceLineNo">342</span>  // Existence checks and watches<a name="line.342"></a>
-<span class="sourceLineNo">343</span>  //<a name="line.343"></a>
-<span class="sourceLineNo">344</span><a name="line.344"></a>
-<span class="sourceLineNo">345</span>  /**<a name="line.345"></a>
-<span class="sourceLineNo">346</span>   * Watch the specified znode for delete/create/change events.  The watcher is<a name="line.346"></a>
-<span class="sourceLineNo">347</span>   * set whether or not the node exists.  If the node already exists, the method<a name="line.347"></a>
-<span class="sourceLineNo">348</span>   * returns true.  If the node does not exist, the method returns false.<a name="line.348"></a>
-<span class="sourceLineNo">349</span>   *<a name="line.349"></a>
-<span class="sourceLineNo">350</span>   * @param zkw zk reference<a name="line.350"></a>
-<span class="sourceLineNo">351</span>   * @param znode path of node to watch<a name="line.351"></a>
-<span class="sourceLineNo">352</span>   * @return true if znode exists, false if does not exist or error<a name="line.352"></a>
-<span class="sourceLineNo">353</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.353"></a>
-<span class="sourceLineNo">354</span>   */<a name="line.354"></a>
-<span class="sourceLineNo">355</span>  public static boolean watchAndCheckExists(ZooKeeperWatcher zkw, String znode)<a name="line.355"></a>
-<span class="sourceLineNo">356</span>  throws KeeperException {<a name="line.356"></a>
-<span class="sourceLineNo">357</span>    try {<a name="line.357"></a>
-<span class="sourceLineNo">358</span>      Stat s = zkw.getRecoverableZooKeeper().exists(znode, zkw);<a name="line.358"></a>
-<span class="sourceLineNo">359</span>      boolean exists = s != null ? true : false;<a name="line.359"></a>
-<span class="sourceLineNo">360</span>      if (exists) {<a name="line.360"></a>
-<span class="sourceLineNo">361</span>        LOG.debug(zkw.prefix("Set watcher on existing znode=" + znode));<a name="line.361"></a>
-<span class="sourceLineNo">362</span>      } else {<a name="line.362"></a>
-<span class="sourceLineNo">363</span>        LOG.debug(zkw.prefix("Set watcher on znode that does not yet exist, " + znode));<a name="line.363"></a>
-<span class="sourceLineNo">364</span>      }<a name="line.364"></a>
-<span class="sourceLineNo">365</span>      return exists;<a name="line.365"></a>
-<span class="sourceLineNo">366</span>    } catch (KeeperException e) {<a name="line.366"></a>
-<span class="sourceLineNo">367</span>      LOG.warn(zkw.prefix("Unable to set watcher on znode " + znode), e);<a name="line.367"></a>
-<span class="sourceLineNo">368</span>      zkw.keeperException(e);<a name="line.368"></a>
-<span class="sourceLineNo">369</span>      return false;<a name="line.369"></a>
-<span class="sourceLineNo">370</span>    } catch (InterruptedException e) {<a name="line.370"></a>
-<span class="sourceLineNo">371</span>      LOG.warn(zkw.prefix("Unable to set watcher on znode " + znode), e);<a name="line.371"></a>
-<span class="sourceLineNo">372</span>      zkw.interruptedException(e);<a name="line.372"></a>
-<span class="sourceLineNo">373</span>      return false;<a name="line.373"></a>
-<span class="sourceLineNo">374</span>    }<a name="line.374"></a>
-<span class="sourceLineNo">375</span>  }<a name="line.375"></a>
-<span class="sourceLineNo">376</span><a name="line.376"></a>
-<span class="sourceLineNo">377</span>  /**<a name="line.377"></a>
-<span class="sourceLineNo">378</span>   * Watch the specified znode, but only if exists. Useful when watching<a name="line.378"></a>
-<span class="sourceLineNo">379</span>   * for deletions. Uses .getData() (and handles NoNodeException) instead<a name="line.379"></a>
-<span class="sourceLineNo">380</span>   * of .exists() to accomplish this, as .getData() will only set a watch if<a name="line.380"></a>
-<span class="sourceLineNo">381</span>   * the znode exists.<a name="line.381"></a>
-<span class="sourceLineNo">382</span>   * @param zkw zk reference<a name="line.382"></a>
-<span class="sourceLineNo">383</span>   * @param znode path of node to watch<a name="line.383"></a>
-<span class="sourceLineNo">384</span>   * @return true if the watch is set, false if node does not exists<a name="line.384"></a>
-<span class="sourceLineNo">385</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.385"></a>
-<span class="sourceLineNo">386</span>   */<a name="line.386"></a>
-<span class="sourceLineNo">387</span>  public static boolean setWatchIfNodeExists(ZooKeeperWatcher zkw, String znode)<a name="line.387"></a>
-<span class="sourceLineNo">388</span>      throws KeeperException {<a name="line.388"></a>
-<span class="sourceLineNo">389</span>    try {<a name="line.389"></a>
-<span class="sourceLineNo">390</span>      zkw.getRecoverableZooKeeper().getData(znode, true, null);<a name="line.390"></a>
-<span class="sourceLineNo">391</span>      return true;<a name="line.391"></a>
-<span class="sourceLineNo">392</span>    } catch (NoNodeException e) {<a name="line.392"></a>
-<span class="sourceLineNo">393</span>      return false;<a name="line.393"></a>
-<span class="sourceLineNo">394</span>    } catch (InterruptedException e) {<a name="line.394"></a>
-<span class="sourceLineNo">395</span>      LOG.warn(zkw.prefix("Unable to set watcher on znode " + znode), e);<a name="line.395"></a>
-<span class="sourceLineNo">396</span>      zkw.interruptedException(e);<a name="line.396"></a>
-<span class="sourceLineNo">397</span>      return false;<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><a name="line.400"></a>
-<span class="sourceLineNo">401</span>  /**<a name="line.401"></a>
-<span class="sourceLineNo">402</span>   * Check if the specified node exists.  Sets no watches.<a name="line.402"></a>
-<span class="sourceLineNo">403</span>   *<a name="line.403"></a>
-<span class="sourceLineNo">404</span>   * @param zkw zk reference<a name="line.404"></a>
-<span class="sourceLineNo">405</span>   * @param znode path of node to watch<a name="line.405"></a>
-<span class="sourceLineNo">406</span>   * @return version of the node if it exists, -1 if does not exist<a name="line.406"></a>
-<span class="sourceLineNo">407</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.407"></a>
-<span class="sourceLineNo">408</span>   */<a name="line.408"></a>
-<span class="sourceLineNo">409</span>  public static int checkExists(ZooKeeperWatcher zkw, String znode)<a name="line.409"></a>
-<span class="sourceLineNo">410</span>  throws KeeperException {<a name="line.410"></a>
-<span class="sourceLineNo">411</span>    try {<a name="line.411"></a>
-<span class="sourceLineNo">412</span>      Stat s = zkw.getRecoverableZooKeeper().exists(znode, null);<a name="line.412"></a>
-<span class="sourceLineNo">413</span>      return s != null ? s.getVersion() : -1;<a name="line.413"></a>
-<span class="sourceLineNo">414</span>    } catch (KeeperException e) {<a name="line.414"></a>
-<span class="sourceLineNo">415</span>      LOG.warn(zkw.prefix("Unable to set watcher on znode (" + znode + ")"), e);<a name="line.415"></a>
-<span class="sourceLineNo">416</span>      zkw.keeperException(e);<a name="line.416"></a>
-<span class="sourceLineNo">417</span>      return -1;<a name="line.417"></a>
-<span class="sourceLineNo">418</span>    } catch (InterruptedException e) {<a name="line.418"></a>
-<span class="sourceLineNo">419</span>      LOG.warn(zkw.prefix("Unable to set watcher on znode (" + znode + ")"), e);<a name="line.419"></a>
-<span class="sourceLineNo">420</span>      zkw.interruptedException(e);<a name="line.420"></a>
-<span class="sourceLineNo">421</span>      return -1;<a name="line.421"></a>
-<span class="sourceLineNo">422</span>    }<a name="line.422"></a>
-<span class="sourceLineNo">423</span>  }<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>  // Znode listings<a name="line.426"></a>
-<span class="sourceLineNo">427</span>  //<a name="line.427"></a>
-<span class="sourceLineNo">428</span><a name="line.428"></a>
-<span class="sourceLineNo">429</span>  /**<a name="line.429"></a>
-<span class="sourceLineNo">430</span>   * Lists the children znodes of the specified znode.  Also sets a watch on<a name="line.430"></a>
-<span class="sourceLineNo">431</span>   * the specified znode which will capture a NodeDeleted event on the specified<a name="line.431"></a>
-<span class="sourceLineNo">432</span>   * znode as well as NodeChildrenChanged if any children of the specified znode<a name="line.432"></a>
-<span class="sourceLineNo">433</span>   * are created or deleted.<a name="line.433"></a>
-<span class="sourceLineNo">434</span>   *<a name="line.434"></a>
-<span class="sourceLineNo">435</span>   * Returns null if the specified node does not exist.  Otherwise returns a<a name="line.435"></a>
-<span class="sourceLineNo">436</span>   * list of children of the specified node.  If the node exists but it has no<a name="line.436"></a>
-<span class="sourceLineNo">437</span>   * children, an empty list will be returned.<a name="line.437"></a>
-<span class="sourceLineNo">438</span>   *<a name="line.438"></a>
-<span class="sourceLineNo">439</span>   * @param zkw zk reference<a name="line.439"></a>
-<span class="sourceLineNo">440</span>   * @param znode path of node to list and watch children of<a name="line.440"></a>
-<span class="sourceLineNo">441</span>   * @return list of children of the specified node, an empty list if the node<a name="line.441"></a>
-<span class="sourceLineNo">442</span>   *          exists but has no children, and null if the node does not exist<a name="line.442"></a>
-<span class="sourceLineNo">443</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.443"></a>
-<span class="sourceLineNo">444</span>   */<a name="line.444"></a>
-<span class="sourceLineNo">445</span>  public static List&lt;String&gt; listChildrenAndWatchForNewChildren(<a name="line.445"></a>
-<span class="sourceLineNo">446</span>      ZooKeeperWatcher zkw, String znode)<a name="line.446"></a>
-<span class="sourceLineNo">447</span>  throws KeeperException {<a name="line.447"></a>
-<span class="sourceLineNo">448</span>    try {<a name="line.448"></a>
-<span class="sourceLineNo">449</span>      List&lt;String&gt; children = zkw.getRecoverableZooKeeper().getChildren(znode, zkw);<a name="line.449"></a>
-<span class="sourceLineNo">450</span>      return children;<a name="line.450"></a>
-<span class="sourceLineNo">451</span>    } catch(KeeperException.NoNodeException ke) {<a name="line.451"></a>
-<span class="sourceLineNo">452</span>      LOG.debug(zkw.prefix("Unable to list children of znode " + znode + " " +<a name="line.452"></a>
-<span class="sourceLineNo">453</span>          "because node does not exist (not an error)"));<a name="line.453"></a>
-<span class="sourceLineNo">454</span>      return null;<a name="line.454"></a>
-<span class="sourceLineNo">455</span>    } catch (KeeperException e) {<a name="line.455"></a>
-<span class="sourceLineNo">456</span>      LOG.warn(zkw.prefix("Unable to list children of znode " + znode + " "), e);<a name="line.456"></a>
-<span class="sourceLineNo">457</span>      zkw.keeperException(e);<a name="line.457"></a>
-<span class="sourceLineNo">458</span>      return null;<a name="line.458"></a>
-<span class="sourceLineNo">459</span>    } catch (InterruptedException e) {<a name="line.459"></a>
-<span class="sourceLineNo">460</span>      LOG.warn(zkw.prefix("Unable to list children of znode " + znode + " "), e);<a name="line.460"></a>
-<span class="sourceLineNo">461</span>      zkw.interruptedException(e);<a name="line.461"></a>
-<span class="sourceLineNo">462</span>      return null;<a name="line.462"></a>
-<span class="sourceLineNo">463</span>    }<a name="line.463"></a>
-<span class="sourceLineNo">464</span>  }<a name="line.464"></a>
-<span class="sourceLineNo">465</span><a name="line.465"></a>
-<span class="sourceLineNo">466</span>  /**<a name="line.466"></a>
-<span class="sourceLineNo">467</span>   * List all the children of the specified znode, setting a watch for children<a name="line.467"></a>
-<span class="sourceLineNo">468</span>   * changes and also setting a watch on every individual child in order to get<a name="line.468"></a>
-<span class="sourceLineNo">469</span>   * the NodeCreated and NodeDeleted events.<a name="line.469"></a>
-<span class="sourceLineNo">470</span>   * @param zkw zookeeper reference<a name="line.470"></a>
-<span class="sourceLineNo">471</span>   * @param znode node to get children of and watch<a name="line.471"></a>
-<span class="sourceLineNo">472</span>   * @return list of znode names, null if the node doesn't exist<a name="line.472"></a>
-<span class="sourceLineNo">473</span>   * @throws KeeperException<a name="line.473"></a>
-<span class="sourceLineNo">474</span>   */<a name="line.474"></a>
-<span class="sourceLineNo">475</span>  public static List&lt;String&gt; listChildrenAndWatchThem(ZooKeeperWatcher zkw,<a name="line.475"></a>
-<span class="sourceLineNo">476</span>      String znode) throws KeeperException {<a name="line.476"></a>
-<span class="sourceLineNo">477</span>    List&lt;String&gt; children = listChildrenAndWatchForNewChildren(zkw, znode);<a name="line.477"></a>
-<span class="sourceLineNo">478</span>    if (children == null) {<a name="line.478"></a>
-<span class="sourceLineNo">479</span>      return null;<a name="line.479"></a>
-<span class="sourceLineNo">480</span>    }<a name="line.480"></a>
-<span class="sourceLineNo">481</span>    for (String child : children) {<a name="line.481"></a>
-<span class="sourceLineNo">482</span>      watchAndCheckExists(zkw, joinZNode(znode, child));<a name="line.482"></a>
-<span class="sourceLineNo">483</span>    }<a name="line.483"></a>
-<span class="sourceLineNo">484</span>    return children;<a name="line.484"></a>
-<span class="sourceLineNo">485</span>  }<a name="line.485"></a>
-<span class="sourceLineNo">486</span><a name="line.486"></a>
-<span class="sourceLineNo">487</span>  /**<a name="line.487"></a>
-<span class="sourceLineNo">488</span>   * Lists the children of the specified znode without setting any watches.<a name="line.488"></a>
-<span class="sourceLineNo">489</span>   *<a name="line.489"></a>
-<span class="sourceLineNo">490</span>   * Sets no watches at all, this method is best effort.<a name="line.490"></a>
-<span class="sourceLineNo">491</span>   *<a name="line.491"></a>
-<span class="sourceLineNo">492</span>   * Returns an empty list if the node has no children.  Returns null if the<a name="line.492"></a>
-<span class="sourceLineNo">493</span>   * parent node itself does not exist.<a name="line.493"></a>
-<span class="sourceLineNo">494</span>   *<a name="line.494"></a>
-<span class="sourceLineNo">495</span>   * @param zkw zookeeper reference<a name="line.495"></a>
-<span class="sourceLineNo">496</span>   * @param znode node to get children<a name="line.496"></a>
-<span class="sourceLineNo">497</span>   * @return list of data of children of specified znode, empty if no children,<a name="line.497"></a>
-<span class="sourceLineNo">498</span>   *         null if parent does not exist<a name="line.498"></a>
-<span class="sourceLineNo">499</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.499"></a>
-<span class="sourceLineNo">500</span>   */<a name="line.500"></a>
-<span class="sourceLineNo">501</span>  public static List&lt;String&gt; listChildrenNoWatch(ZooKeeperWatcher zkw, String znode)<a name="line.501"></a>
-<span class="sourceLineNo">502</span>  throws KeeperException {<a name="line.502"></a>
-<span class="sourceLineNo">503</span>    List&lt;String&gt; children = null;<a name="line.503"></a>
-<span class="sourceLineNo">504</span>    try {<a name="line.504"></a>
-<span class="sourceLineNo">505</span>      // List the children without watching<a name="line.505"></a>
-<span class="sourceLineNo">506</span>      children = zkw.getRecoverableZooKeeper().getChildren(znode, null);<a name="line.506"></a>
-<span class="sourceLineNo">507</span>    } catch(KeeperException.NoNodeException nne) {<a name="line.507"></a>
-<span class="sourceLineNo">508</span>      return null;<a name="line.508"></a>
-<span class="sourceLineNo">509</span>    } catch(InterruptedException ie) {<a name="line.509"></a>
-<span class="sourceLineNo">510</span>      zkw.interruptedException(ie);<a name="line.510"></a>
-<span class="sourceLineNo">511</span>    }<a name="line.511"></a>
-<span class="sourceLineNo">512</span>    return children;<a name="line.512"></a>
-<span class="sourceLineNo">513</span>  }<a name="line.513"></a>
-<span class="sourceLineNo">514</span><a name="line.514"></a>
-<span class="sourceLineNo">515</span>  /**<a name="line.515"></a>
-<span class="sourceLineNo">516</span>   * Simple class to hold a node path and node data.<a name="line.516"></a>
-<span class="sourceLineNo">517</span>   * @deprecated Unused<a name="line.517"></a>
-<span class="sourceLineNo">518</span>   */<a name="line.518"></a>
-<span class="sourceLineNo">519</span>  @Deprecated<a name="line.519"></a>
-<span class="sourceLineNo">520</span>  public static class NodeAndData {<a name="line.520"></a>
-<span class="sourceLineNo">521</span>    private String node;<a name="line.521"></a>
-<span class="sourceLineNo">522</span>    private byte [] data;<a name="line.522"></a>
-<span class="sourceLineNo">523</span>    public NodeAndData(String node, byte [] data) {<a name="line.523"></a>
-<span class="sourceLineNo">524</span>      this.node = node;<a name="line.524"></a>
-<span class="sourceLineNo">525</span>      this.data = data;<a name="line.525"></a>
-<span class="sourceLineNo">526</span>    }<a name="line.526"></a>
-<span class="sourceLineNo">527</span>    public String getNode() {<a name="line.527"></a>
-<span class="sourceLineNo">528</span>      return node;<a name="line.528"></a>
-<span class="sourceLineNo">529</span>    }<a name="line.529"></a>
-<span class="sourceLineNo">530</span>    public byte [] getData() {<a name="line.530"></a>
-<span class="sourceLineNo">531</span>      return data;<a name="line.531"></a>
-<span class="sourceLineNo">532</span>    }<a name="line.532"></a>
-<span class="sourceLineNo">533</span>    @Override<a name="line.533"></a>
-<span class="sourceLineNo">534</span>    public String toString() {<a name="line.534"></a>
-<span class="sourceLineNo">535</span>      return node;<a name="line.535"></a>
-<span class="sourceLineNo">536</span>    }<a name="line.536"></a>
-<span class="sourceLineNo">537</span>    public boolean isEmpty() {<a name="line.537"></a>
-<span class="sourceLineNo">538</span>      return (data == null || data.length == 0);<a name="line.538"></a>
-<span class="sourceLineNo">539</span>    }<a name="line.539"></a>
-<span class="sourceLineNo">540</span>  }<a name="line.540"></a>
-<span class="sourceLineNo">541</span><a name="line.541"></a>
-<span class="sourceLineNo">542</span>  /**<a name="line.542"></a>
-<span class="sourceLineNo">543</span>   * Checks if the specified znode has any children.  Sets no watches.<a name="line.543"></a>
-<span class="sourceLineNo">544</span>   *<a name="line.544"></a>
-<span class="sourceLineNo">545</span>   * Returns true if the node exists and has children.  Returns false if the<a name="line.545"></a>
-<span class="sourceLineNo">546</span>   * node does not exist or if the node does not have any children.<a name="line.546"></a>
-<span class="sourceLineNo">547</span>   *<a name="line.547"></a>
-<span class="sourceLineNo">548</span>   * Used during master initialization to determine if the master is a<a name="line.548"></a>
-<span class="sourceLineNo">549</span>   * failed-over-to master or the first master during initial cluster startup.<a name="line.549"></a>
-<span class="sourceLineNo">550</span>   * If the directory for regionserver ephemeral nodes is empty then this is<a name="line.550"></a>
-<span class="sourceLineNo">551</span>   * a cluster startup, if not then it is not cluster startup.<a name="line.551"></a>
-<span class="sourceLineNo">552</span>   *<a name="line.552"></a>
-<span class="sourceLineNo">553</span>   * @param zkw zk reference<a name="line.553"></a>
-<span class="sourceLineNo">554</span>   * @param znode path of node to check for children of<a name="line.554"></a>
-<span class="sourceLineNo">555</span>   * @return true if node has children, false if not or node does not exist<a name="line.555"></a>
-<span class="sourceLineNo">556</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.556"></a>
-<span class="sourceLineNo">557</span>   */<a name="line.557"></a>
-<span class="sourceLineNo">558</span>  public static boolean nodeHasChildren(ZooKeeperWatcher zkw, String znode)<a name="line.558"></a>
-<span class="sourceLineNo">559</span>  throws KeeperException {<a name="line.559"></a>
-<span class="sourceLineNo">560</span>    try {<a name="line.560"></a>
-<span class="sourceLineNo">561</span>      return !zkw.getRecoverableZooKeeper().getChildren(znode, null).isEmpty();<a name="line.561"></a>
-<span class="sourceLineNo">562</span>    } catch(KeeperException.NoNodeException ke) {<a name="line.562"></a>
-<span class="sourceLineNo">563</span>      LOG.debug(zkw.prefix("Unable to list children of znode " + znode + " " +<a name="line.563"></a>
-<span class="sourceLineNo">564</span>      "because node does not exist (not an error)"));<a name="line.564"></a>
-<span class="sourceLineNo">565</span>      return false;<a name="line.565"></a>
-<span class="sourceLineNo">566</span>    } catch (KeeperException e) {<a name="line.566"></a>
-<span class="sourceLineNo">567</span>      LOG.warn(zkw.prefix("Unable to list children of znode " + znode), e);<a name="line.567"></a>
-<span class="sourceLineNo">568</span>      zkw.keeperException(e);<a name="line.568"></a>
-<span class="sourceLineNo">569</span>      return false;<a name="line.569"></a>
-<span class="sourceLineNo">570</span>    } catch (InterruptedException e) {<a name="line.570"></a>
-<span class="sourceLineNo">571</span>      LOG.warn(zkw.prefix("Unable to list children of znode " + znode), e);<a name="line.571"></a>
-<span class="sourceLineNo">572</span>      zkw.interruptedException(e);<a name="line.572"></a>
-<span class="sourceLineNo">573</span>      return false;<a name="line.573"></a>
-<span class="sourceLineNo">574</span>    }<a name="line.574"></a>
-<span class="sourceLineNo">575</span>  }<a name="line.575"></a>
-<span class="sourceLineNo">576</span><a name="line.576"></a>
-<span class="sourceLineNo">577</span>  /**<a name="line.577"></a>
-<span class="sourceLineNo">578</span>   * Get the number of children of the specified node.<a name="line.578"></a>
-<span class="sourceLineNo">579</span>   *<a name="line.579"></a>
-<span class="sourceLineNo">580</span>   * If the node does not exist or has no children, returns 0.<a name="line.580"></a>
-<span class="sourceLineNo">581</span>   *<a name="line.581"></a>
-<span class="sourceLineNo">582</span>   * Sets no watches at all.<a name="line.582"></a>
-<span class="sourceLineNo">583</span>   *<a name="line.583"></a>
-<span class="sourceLineNo">584</span>   * @param zkw zk reference<a name="line.584"></a>
-<span class="sourceLineNo">585</span>   * @param znode path of node to count children of<a name="line.585"></a>
-<span class="sourceLineNo">586</span>   * @return number of children of specified node, 0 if none or parent does not<a name="line.586"></a>
-<span class="sourceLineNo">587</span>   *         exist<a name="line.587"></a>
-<span class="sourceLineNo">588</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.588"></a>
-<span class="sourceLineNo">589</span>   */<a name="line.589"></a>
-<span class="sourceLineNo">590</span>  public static int getNumberOfChildren(ZooKeeperWatcher zkw, String znode)<a name="line.590"></a>
-<span class="sourceLineNo">591</span>  throws KeeperException {<a name="line.591"></a>
-<span class="sourceLineNo">592</span>    try {<a name="line.592"></a>
-<span class="sourceLineNo">593</span>      Stat stat = zkw.getRecoverableZooKeeper().exists(znode, null);<a name="line.593"></a>
-<span class="sourceLineNo">594</span>      return stat == null ? 0 : stat.getNumChildren();<a name="line.594"></a>
-<span class="sourceLineNo">595</span>    } catch(KeeperException e) {<a name="line.595"></a>
-<span class="sourceLineNo">596</span>      LOG.warn(zkw.prefix("Unable to get children of node " + znode));<a name="line.596"></a>
-<span class="sourceLineNo">597</span>      zkw.keeperException(e);<a name="line.597"></a>
-<span class="sourceLineNo">598</span>    } catch(InterruptedException e) {<a name="line.598"></a>
-<span class="sourceLineNo">599</span>      zkw.interruptedException(e);<a name="line.599"></a>
-<span class="sourceLineNo">600</span>    }<a name="line.600"></a>
-<span class="sourceLineNo">601</span>    return 0;<a name="line.601"></a>
-<span class="sourceLineNo">602</span>  }<a name="line.602"></a>
-<span class="sourceLineNo">603</span><a name="line.603"></a>
-<span class="sourceLineNo">604</span>  //<a name="line.604"></a>
-<span class="sourceLineNo">605</span>  // Data retrieval<a name="line.605"></a>
-<span class="sourceLineNo">606</span>  //<a name="line.606"></a>
-<span class="sourceLineNo">607</span><a name="line.607"></a>
-<span class="sourceLineNo">608</span>  /**<a name="line.608"></a>
-<span class="sourceLineNo">609</span>   * Get znode data. Does not set a watcher.<a name="line.609"></a>
-<span class="sourceLineNo">610</span>   * @return ZNode data, null if the node does not exist or if there is an<a name="line.610"></a>
-<span class="sourceLineNo">611</span>   *  error.<a name="line.611"></a>
-<span class="sourceLineNo">612</span>   */<a name="line.612"></a>
-<span class="sourceLineNo">613</span>  public static byte [] getData(ZooKeeperWatcher zkw, String znode)<a name="line.613"></a>
-<span class="sourceLineNo">614</span>      throws KeeperException, InterruptedException {<a name="line.614"></a>
-<span class="sourceLineNo">615</span>    try {<a name="line.615"></a>
-<span class="sourceLineNo">616</span>      byte [] data = zkw.getRecoverableZooKeeper().getData(znode, null, null);<a name="line.616"></a>
-<span class="sourceLineNo">617</span>      logRetrievedMsg(zkw, znode, data, false);<a name="line.617"></a>
-<span class="sourceLineNo">618</span>      return data;<a name="line.618"></a>
-<span class="sourceLineNo">619</span>    } catch (KeeperException.NoNodeException e) {<a name="line.619"></a>
-<span class="sourceLineNo">620</span>      LOG.debug(zkw.prefix("Unable to get data of znode " + znode + " " +<a name="line.620"></a>
-<span class="sourceLineNo">621</span>          "because node does not exist (not an error)"));<a name="line.621"></a>
-<span class="sourceLineNo">622</span>      return null;<a name="line.622"></a>
-<span class="sourceLineNo">623</span>    } catch (KeeperException e) {<a name="line.623"></a>
-<span class="sourceLineNo">624</span>      LOG.warn(zkw.prefix("Unable to get data of znode " + znode), e);<a name="line.624"></a>
-<span class="sourceLineNo">625</span>      zkw.keeperException(e);<a name="line.625"></a>
-<span class="sourceLineNo">626</span>      return null;<a name="line.626"></a>
-<span class="sourceLineNo">627</span>    }<a name="line.627"></a>
-<span class="sourceLineNo">628</span>  }<a name="line.628"></a>
-<span class="sourceLineNo">629</span><a name="line.629"></a>
-<span class="sourceLineNo">630</span>  /**<a name="line.630"></a>
-<span class="sourceLineNo">631</span>   * Get the data at the specified znode and set a watch.<a name="line.631"></a>
-<span class="sourceLineNo">632</span>   *<a name="line.632"></a>
-<span class="sourceLineNo">633</span>   * Returns the data and sets a watch if the node exists.  Returns null and no<a name="line.633"></a>
-<span class="sourceLineNo">634</span>   * watch is set if the node does not exist or there is an exception.<a name="line.634"></a>
-<span class="sourceLineNo">635</span>   *<a name="line.635"></a>
-<span class="sourceLineNo">636</span>   * @param zkw zk reference<a name="line.636"></a>
-<span class="sourceLineNo">637</span>   * @param znode path of node<a name="line.637"></a>
-<span class="sourceLineNo">638</span>   * @return data of the specified znode, or null<a name="line.638"></a>
-<span class="sourceLineNo">639</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.639"></a>
-<span class="sourceLineNo">640</span>   */<a name="line.640"></a>
-<span class="sourceLineNo">641</span>  public static byte [] getDataAndWatch(ZooKeeperWatcher zkw, String znode)<a name="line.641"></a>
-<span class="sourceLineNo">642</span>  throws KeeperException {<a name="line.642"></a>
-<span class="sourceLineNo">643</span>    return getDataInternal(zkw, znode, null, true);<a name="line.643"></a>
-<span class="sourceLineNo">644</span>  }<a name="line.644"></a>
-<span class="sourceLineNo">645</span><a name="line.645"></a>
-<span class="sourceLineNo">646</span>  /**<a name="line.646"></a>
-<span class="sourceLineNo">647</span>   * Get the data at the specified znode and set a watch.<a name="line.647"></a>
-<span class="sourceLineNo">648</span>   *<a name="line.648"></a>
-<span class="sourceLineNo">649</span>   * Returns the data and sets a watch if the node exists.  Returns null and no<a name="line.649"></a>
-<span class="sourceLineNo">650</span>   * watch is set if the node does not exist or there is an exception.<a name="line.650"></a>
-<span class="sourceLineNo">651</span>   *<a name="line.651"></a>
-<span class="sourceLineNo">652</span>   * @param zkw zk reference<a name="line.652"></a>
-<span class="sourceLineNo">653</span>   * @param znode path of node<a name="line.653"></a>
-<span class="sourceLineNo">654</span>   * @param stat object to populate the version of the znode<a name="line.654"></a>
-<span class="sourceLineNo">655</span>   * @return data of the specified znode, or null<a name="line.655"></a>
-<span class="sourceLineNo">656</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.656"></a>
-<span class="sourceLineNo">657</span>   */<a name="line.657"></a>
-<span class="sourceLineNo">658</span>  public static byte[] getDataAndWatch(ZooKeeperWatcher zkw, String znode,<a name="line.658"></a>
-<span class="sourceLineNo">659</span>      Stat stat) throws KeeperException {<a name="line.659"></a>
-<span class="sourceLineNo">660</span>    return getDataInternal(zkw, znode, stat, true);<a name="line.660"></a>
-<span class="sourceLineNo">661</span>  }<a name="line.661"></a>
-<span class="sourceLineNo">662</span><a name="line.662"></a>
-<span class="sourceLineNo">663</span>  private static byte[] getDataInternal(ZooKeeperWatcher zkw, String znode, Stat stat,<a name="line.663"></a>
-<span class="sourceLineNo">664</span>      boolean watcherSet)<a name="line.664"></a>
-<span class="sourceLineNo">665</span>      throws KeeperException {<a name="line.665"></a>
-<span class="sourceLineNo">666</span>    try {<a name="line.666"></a>
-<span class="sourceLineNo">667</span>      byte [] data = zkw.getRecoverableZooKeeper().getData(znode, zkw, stat);<a name="line.667"></a>
-<span class="sourceLineNo">668</span>      logRetrievedMsg(zkw, znode, data, watcherSet);<a name="line.668"></a>
-<span class="sourceLineNo">669</span>      return data;<a name="line.669"></a>
-<span class="sourceLineNo">670</span>    } catch (KeeperException.NoNodeException e) {<a name="line.670"></a>
-<span class="sourceLineNo">671</span>      // This log can get pretty annoying when we cycle on 100ms waits.<a name="line.671"></a>
-<span class="sourceLineNo">672</span>      // Enable trace if you really want to see it.<a name="line.672"></a>
-<span class="sourceLineNo">673</span>      LOG.trace(zkw.prefix("Unable to get data of znode " + znode + " " +<a name="line.673"></a>
-<span class="sourceLineNo">674</span>        "because node does not exist (not an error)"));<a name="line.674"></a>
-<span class="sourceLineNo">675</span>      return null;<a name="line.675"></a>
-<span class="sourceLineNo">676</span>    } catch (KeeperException e) {<a name="line.676"></a>
-<span class="sourceLineNo">677</span>      LOG.warn(zkw.prefix("Unable to get data of znode " + znode), e);<a name="line.677"></a>
-<span class="sourceLineNo">678</span>      zkw.keeperException(e);<a name="line.678"></a>
-<span class="sourceLineNo">679</span>      return null;<a name="line.679"></a>
-<span class="sourceLineNo">680</span>    } catch (InterruptedException e) {<a name="line.680"></a>
-<span class="sourceLineNo">681</span>      LOG.warn(zkw.prefix("Unable to get data of znode " + znode), e);<a name="line.681"></a>
-<span class="sourceLineNo">682</span>      zkw.interruptedException(e);<a name="line.682"></a>
-<span class="sourceLineNo">683</span>      return null;<a name="line.683"></a>
-<span class="sourceLineNo">684</span>    }<a name="line.684"></a>
-<span class="sourceLineNo">685</span>  }<a name="line.685"></a>
-<span class="sourceLineNo">686</span><a name="line.686"></a>
-<span class="sourceLineNo">687</span>  /**<a name="line.687"></a>
-<span class="sourceLineNo">688</span>   * Get the data at the specified znode without setting a watch.<a name="line.688"></a>
-<span class="sourceLineNo">689</span>   *<a name="line.689"></a>
-<span class="sourceLineNo">690</span>   * Returns the data if the node exists.  Returns null if the node does not<a name="line.690"></a>
-<span class="sourceLineNo">691</span>   * exist.<a name="line.691"></a>
-<span class="sourceLineNo">692</span>   *<a name="line.692"></a>
-<span class="sourceLineNo">693</span>   * Sets the stats of the node in the passed Stat object.  Pass a null stat if<a name="line.693"></a>
-<span class="sourceLineNo">694</span>   * not interested.<a name="line.694"></a>
-<span class="sourceLineNo">695</span>   *<a name="line.695"></a>
-<span class="sourceLineNo">696</span>   * @param zkw zk reference<a name="line.696"></a>
-<span class="sourceLineNo">697</span>   * @param znode path of node<a name="line.697"></a>
-<span class="sourceLineNo">698</span>   * @param stat node status to get if node exists<a name="line.698"></a>
-<span class="sourceLineNo">699</span>   * @return data of the specified znode, or null if node does not exist<a name="line.699"></a>
-<span class="sourceLineNo">700</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.700"></a>
-<span class="sourceLineNo">701</span>   */<a name="line.701"></a>
-<span class="sourceLineNo">702</span>  public static byte [] getDataNoWatch(ZooKeeperWatcher zkw, String znode,<a name="line.702"></a>
-<span class="sourceLineNo">703</span>      Stat stat)<a name="line.703"></a>
-<span class="sourceLineNo">704</span>  throws KeeperException {<a name="line.704"></a>
-<span class="sourceLineNo">705</span>    try {<a name="line.705"></a>
-<span class="sourceLineNo">706</span>      byte [] data = zkw.getRecoverableZooKeeper().getData(znode, null, stat);<a name="line.706"></a>
-<span class="sourceLineNo">707</span>      logRetrievedMsg(zkw, znode, data, false);<a name="line.707"></a>
-<span class="sourceLineNo">708</span>      return data;<a name="line.708"></a>
-<span class="sourceLineNo">709</span>    } catch (KeeperException.NoNodeException e) {<a name="line.709"></a>
-<span class="sourceLineNo">710</span>      LOG.debug(zkw.prefix("Unable to get data of znode " + znode + " " +<a name="line.710"></a>
-<span class="sourceLineNo">711</span>          "because node does not exist (not necessarily an error)"));<a name="line.711"></a>
-<span class="sourceLineNo">712</span>      return null;<a name="line.712"></a>
-<span class="sourceLineNo">713</span>    } catch (KeeperException e) {<a name="line.713"></a>
-<span class="sourceLineNo">714</span>      LOG.warn(zkw.prefix("Unable to get data of znode " + znode), e);<a name="line.714"></a>
-<span class="sourceLineNo">715</span>      zkw.keeperException(e);<a name="line.715"></a>
-<span class="sourceLineNo">716</span>      return null;<a name="line.716"></a>
-<span class="sourceLineNo">717</span>    } catch (InterruptedException e) {<a name="line.717"></a>
-<span class="sourceLineNo">718</span>      LOG.warn(zkw.prefix("Unable to get data of znode " + znode), e);<a name="line.718"></a>
-<span class="sourceLineNo">719</span>      zkw.interruptedException(e);<a name="line.719"></a>
-<span class="sourceLineNo">720</span>      return null;<a name="line.720"></a>
-<span class="sourceLineNo">721</span>    }<a name="line.721"></a>
-<span class="sourceLineNo">722</span>  }<a name="line.722"></a>
-<span class="sourceLineNo">723</span><a name="line.723"></a>
-<span class="sourceLineNo">724</span>  /**<a name="line.724"></a>
-<span class="sourceLineNo">725</span>   * Returns the date of child znodes of the specified znode.  Also sets a watch on<a name="line.725"></a>
-<span class="sourceLineNo">726</span>   * the specified znode which will capture a NodeDeleted event on the specified<a name="line.726"></a>
-<span class="sourceLineNo">727</span>   * znode as well as NodeChildrenChanged if any children of the specified znode<a name="line.727"></a>
-<span class="sourceLineNo">728</span>   * are created or deleted.<a name="line.728"></a>
-<span class="sourceLineNo">729</span>   *<a name="line.729"></a>
-<span class="sourceLineNo">730</span>   * Returns null if the specified node does not exist.  Otherwise returns a<a name="line.730"></a>
-<span class="sourceLineNo">731</span>   * list of children of the specified node.  If the node exists but it has no<a name="line.731"></a>
-<span class="sourceLineNo">732</span>   * children, an empty list will be returned.<a name="line.732"></a>
-<span class="sourceLineNo">733</span>   *<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 baseNode path of node to list and watch children of<a name="line.735"></a>
-<span class="sourceLineNo">736</span>   * @return list of data of children of the specified node, an empty list if the node<a name="line.736"></a>
-<span class="sourceLineNo">737</span>   *          exists but has no children, and null if the node does not exist<a name="line.737"></a>
-<span class="sourceLineNo">738</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.738"></a>
-<span class="sourceLineNo">739</span>   * @deprecated Unused<a name="line.739"></a>
-<span class="sourceLineNo">740</span>   */<a name="line.740"></a>
-<span class="sourceLineNo">741</span>  @Deprecated<a name="line.741"></a>
-<span class="sourceLineNo">742</span>  public static List&lt;NodeAndData&gt; getChildDataAndWatchForNewChildren(<a name="line.742"></a>
-<span class="sourceLineNo">743</span>      ZooKeeperWatcher zkw, String baseNode) throws KeeperException {<a name="line.743"></a>
-<span class="sourceLineNo">744</span>    List&lt;String&gt; nodes =<a name="line.744"></a>
-<span class="sourceLineNo">745</span>      ZKUtil.listChildrenAndWatchForNewChildren(zkw, baseNode);<a name="line.745"></a>
-<span class="sourceLineNo">746</span>    if (nodes != null) {<a name="line.746"></a>
-<span class="sourceLineNo">747</span>      List&lt;NodeAndData&gt; newNodes = new ArrayList&lt;&gt;();<a name="line.747"></a>
-<span class="sourceLineNo">748</span>      for (String node : nodes) {<a name="line.748"></a>
-<span class="sourceLineNo">749</span>        String nodePath = ZKUtil.joinZNode(baseNode, node);<a name="line.749"></a>
-<span class="sourceLineNo">750</span>        byte[] data = ZKUtil.getDataAndWatch(zkw, nodePath);<a name="line.750"></a>
-<span class="sourceLineNo">751</span>        newNodes.add(new NodeAndData(nodePath, data));<a name="line.751"></a>
-<span class="sourceLineNo">752</span>      }<a name="line.752"></a>
-<span class="sourceLineNo">753</span>      return newNodes;<a name="line.753"></a>
-<span class="sourceLineNo">754</span>    }<a name="line.754"></a>
-<span class="sourceLineNo">755</span>    return null;<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>  /**<a name="line.758"></a>
-<span class="sourceLineNo">759</span>   * Update the data of an existing node with the expected version to have the<a name="line.759"></a>
-<span class="sourceLineNo">760</span>   * specified data.<a name="line.760"></a>
-<span class="sourceLineNo">761</span>   *<a name="line.761"></a>
-<span class="sourceLineNo">762</span>   * Throws an exception if there is a version mismatch or some other problem.<a name="line.762"></a>
-<span class="sourceLineNo">763</span>   *<a name="line.763"></a>
-<span class="sourceLineNo">764</span>   * Sets no watches under any conditions.<a name="line.764"></a>
-<span class="sourceLineNo">765</span>   *<a name="line.765"></a>
-<span class="sourceLineNo">766</span>   * @param zkw zk reference<a name="line.766"></a>
-<span class="sourceLineNo">767</span>   * @param znode<a name="line.767"></a>
-<span class="sourceLineNo">768</span>   * @param data<a name="line.768"></a>
-<span class="sourceLineNo">769</span>   * @param expectedVersion<a name="line.769"></a>
-<span class="sourceLineNo">770</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.770"></a>
-<span class="sourceLineNo">771</span>   * @throws KeeperException.BadVersionException if version mismatch<a name="line.771"></a>
-<span class="sourceLineNo">772</span>   * @deprecated Unused<a name="line.772"></a>
-<span class="sourceLineNo">773</span>   */<a name="line.773"></a>
-<span class="sourceLineNo">774</span>  @Deprecated<a name="line.774"></a>
-<span class="sourceLineNo">775</span>  public static void updateExistingNodeData(ZooKeeperWatcher zkw, String znode,<a name="line.775"></a>
-<span class="sourceLineNo">776</span>      byte [] data, int expectedVersion)<a name="line.776"></a>
-<span class="sourceLineNo">777</span>  throws KeeperException {<a name="line.777"></a>
-<span class="sourceLineNo">778</span>    try {<a name="line.778"></a>
-<span class="sourceLineNo">779</span>      zkw.getRecoverableZooKeeper().setData(znode, data, expectedVersion);<a name="line.779"></a>
-<span class="sourceLineNo">780</span>    } catch(InterruptedException ie) {<a name="line.780"></a>
-<span class="sourceLineNo">781</span>      zkw.interruptedException(ie);<a name="line.781"></a>
-<span class="sourceLineNo">782</span>    }<a name="line.782"></a>
-<span class="sourceLineNo">783</span>  }<a name="line.783"></a>
-<span class="sourceLineNo">784</span><a name="line.784"></a>
-<span class="sourceLineNo">785</span>  //<a name="line.785"></a>
-<span class="sourceLineNo">786</span>  // Data setting<a name="line.786"></a>
-<span class="sourceLineNo">787</span>  //<a name="line.787"></a>
-<span class="sourceLineNo">788</span><a name="line.788"></a>
-<span class="sourceLineNo">789</span>  /**<a name="line.789"></a>
-<span class="sourceLineNo">790</span>   * Sets the data of the existing znode to be the specified data.  Ensures that<a name="line.790"></a>
-<span class="sourceLineNo">791</span>   * the current data has the specified expected version.<a name="line.791"></a>
-<span class="sourceLineNo">792</span>   *<a name="line.792"></a>
-<span class="sourceLineNo">793</span>   * &lt;p&gt;If the node does not exist, a {@link NoNodeException} will be thrown.<a name="line.793"></a>
-<span class="sourceLineNo">794</span>   *<a name="line.794"></a>
-<span class="sourceLineNo">795</span>   * &lt;p&gt;If their is a version mismatch, method returns null.<a name="line.795"></a>
-<span class="sourceLineNo">796</span>   *<a name="line.796"></a>
-<span class="sourceLineNo">797</span>   * &lt;p&gt;No watches are set but setting data will trigger other watchers of this<a name="line.797"></a>
-<span class="sourceLineNo">798</span>   * node.<a name="line.798"></a>
-<span class="sourceLineNo">799</span>   *<a name="line.799"></a>
-<span class="sourceLineNo">800</span>   * &lt;p&gt;If there is another problem, a KeeperException will be thrown.<a name="line.800"></a>
-<span class="sourceLineNo">801</span>   *<a name="line.801"></a>
-<span class="sourceLineNo">802</span>   * @param zkw zk reference<a name="line.802"></a>
-<span class="sourceLineNo">803</span>   * @param znode path of node<a name="line.803"></a>
-<span class="sourceLineNo">804</span>   * @param data data to set for node<a name="line.804"></a>
-<span class="sourceLineNo">805</span>   * @param expectedVersion version expected when setting data<a name="line.805"></a>
-<span class="sourceLineNo">806</span>   * @return true if data set, false if version mismatch<a name="line.806"></a>
-<span class="sourceLineNo">807</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.807"></a>
-<span class="sourceLineNo">808</span>   */<a name="line.808"></a>
-<span class="sourceLineNo">809</span>  public static boolean setData(ZooKeeperWatcher zkw, String znode,<a name="line.809"></a>
-<span class="sourceLineNo">810</span>      byte [] data, int expectedVersion)<a name="line.810"></a>
-<span class="sourceLineNo">811</span>  throws KeeperException, KeeperException.NoNodeException {<a name="line.811"></a>
-<span class="sourceLineNo">812</span>    try {<a name="line.812"></a>
-<span class="sourceLineNo">813</span>      return zkw.getRecoverableZooKeeper().setData(znode, data, expectedVersion) != null;<a name="line.813"></a>
-<span class="sourceLineNo">814</span>    } catch (InterruptedException e) {<a name="line.814"></a>
-<span class="sourceLineNo">815</span>      zkw.interruptedException(e);<a name="line.815"></a>
-<span class="sourceLineNo">816</span>      return false;<a name="line.816"></a>
-<span class="sourceLineNo">817</span>    }<a name="line.817"></a>
-<span class="sourceLineNo">818</span>  }<a name="line.818"></a>
-<span class="sourceLineNo">819</span><a name="line.819"></a>
-<span class="sourceLineNo">820</span>  /**<a name="line.820"></a>
-<span class="sourceLineNo">821</span>   * Set data into node creating node if it doesn't yet exist.<a name="line.821"></a>
-<span class="sourceLineNo">822</span>   * Does not set watch.<a name="line.822"></a>
-<span class="sourceLineNo">823</span>   *<a name="line.823"></a>
-<span class="sourceLineNo">824</span>   * @param zkw zk reference<a name="line.824"></a>
-<span class="sourceLineNo">825</span>   * @param znode path of node<a name="line.825"></a>
-<span class="sourceLineNo">826</span>   * @param data data to set for node<a name="line.826"></a>
-<span class="sourceLineNo">827</span>   * @throws KeeperException<a name="line.827"></a>
-<span class="sourceLineNo">828</span>   */<a name="line.828"></a>
-<span class="sourceLineNo">829</span>  public static void createSetData(final ZooKeeperWatcher zkw, final String znode,<a name="line.829"></a>
-<span class="sourceLineNo">830</span>      final byte [] data)<a name="line.830"></a>
-<span class="sourceLineNo">831</span>  throws KeeperException {<a name="line.831"></a>
-<span class="sourceLineNo">832</span>    if (checkExists(zkw, znode) == -1) {<a name="line.832"></a>
-<span class="sourceLineNo">833</span>      ZKUtil.createWithParents(zkw, znode, data);<a name="line.833"></a>
-<span class="sourceLineNo">834</span>    } else {<a name="line.834"></a>
-<span class="sourceLineNo">835</span>      ZKUtil.setData(zkw, znode, data);<a name="line.835"></a>
-<span class="sourceLineNo">836</span>    }<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>   * Sets the data of the existing znode to be the specified data.  The node<a name="line.840"></a>
-<span class="sourceLineNo">841</span>   * must exist but no checks are done on the existing data or version.<a name="line.841"></a>
-<span class="sourceLineNo">842</span>   *<a name="line.842"></a>
-<span class="sourceLineNo">843</span>   * &lt;p&gt;If the node does not exist, a {@link NoNodeException} will be thrown.<a name="line.843"></a>
-<span class="sourceLineNo">844</span>   *<a name="line.844"></a>
-<span class="sourceLineNo">845</span>   * &lt;p&gt;No watches are set but setting data will trigger other watchers of this<a name="line.845"></a>
-<span class="sourceLineNo">846</span>   * node.<a name="line.846"></a>
-<span class="sourceLineNo">847</span>   *<a name="line.847"></a>
-<span class="sourceLineNo">848</span>   * &lt;p&gt;If there is another problem, a KeeperException will be thrown.<a name="line.848"></a>
-<span class="sourceLineNo">849</span>   *<a name="line.849"></a>
-<span class="sourceLineNo">850</span>   * @param zkw zk reference<a name="line.850"></a>
-<span class="sourceLineNo">851</span>   * @param znode path of node<a name="line.851"></a>
-<span class="sourceLineNo">852</span>   * @param data data to set for node<a name="line.852"></a>
-<span class="sourceLineNo">853</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.853"></a>
-<span class="sourceLineNo">854</span>   */<a name="line.854"></a>
-<span class="sourceLineNo">855</span>  public static void setData(ZooKeeperWatcher zkw, String znode, byte [] data)<a name="line.855"></a>
-<span class="sourceLineNo">856</span>  throws KeeperException, KeeperException.NoNodeException {<a name="line.856"></a>
-<span class="sourceLineNo">857</span>    setData(zkw, (SetData)ZKUtilOp.setData(znode, data));<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>  private static void setData(ZooKeeperWatcher zkw, SetData setData)<a name="line.860"></a>
-<span class="sourceLineNo">861</span>  throws KeeperException, KeeperException.NoNodeException {<a name="line.861"></a>
-<span class="sourceLineNo">862</span>    SetDataRequest sd = (SetDataRequest)toZooKeeperOp(zkw, setData).toRequestRecord();<a name="line.862"></a>
-<span class="sourceLineNo">863</span>    setData(zkw, sd.getPath(), sd.getData(), sd.getVersion());<a name="line.863"></a>
-<span class="sourceLineNo">864</span>  }<a name="line.864"></a>
-<span class="sourceLineNo">865</span><a name="line.865"></a>
-<span class="sourceLineNo">866</span>  /**<a name="line.866"></a>
-<span class="sourceLineNo">867</span>   * Returns whether or not secure authentication is enabled<a name="line.867"></a>
-<span class="sourceLineNo">868</span>   * (whether &lt;code&gt;hbase.security.authentication&lt;/code&gt; is set to<a name="line.868"></a>
-<span class="sourceLineNo">869</span>   * &lt;code&gt;kerberos&lt;/code&gt;.<a name="line.869"></a>
-<span class="sourceLineNo">870</span>   */<a name="line.870"></a>
-<span class="sourceLineNo">871</span>  public static boolean isSecureZooKeeper(Configuration conf) {<a name="line.871"></a>
-<span class="sourceLineNo">872</span>    // Detection for embedded HBase client with jaas configuration<a name="line.872"></a>
-<span class="sourceLineNo">873</span>    // defined for third party programs.<a name="line.873"></a>
-<span class="sourceLineNo">874</span>    try {<a name="line.874"></a>
-<span class="sourceLineNo">875</span>      javax.security.auth.login.Configuration testConfig =<a name="line.875"></a>
-<span class="sourceLineNo">876</span>          javax.security.auth.login.Configuration.getConfiguration();<a name="line.876"></a>
-<span class="sourceLineNo">877</span>      if (testConfig.getAppConfigurationEntry("Client") == null<a name="line.877"></a>
-<span class="sourceLineNo">878</span>          &amp;&amp; testConfig.getAppConfigurationEntry(<a name="line.878"></a>
-<span class="sourceLineNo">879</span>            JaasConfiguration.CLIENT_KEYTAB_KERBEROS_CONFIG_NAME) == null<a name="line.879"></a>
-<span class="sourceLineNo">880</span>          &amp;&amp; testConfig.getAppConfigurationEntry(<a name="line.880"></a>
-<span class="sourceLineNo">881</span>              JaasConfiguration.SERVER_KEYTAB_KERBEROS_CONFIG_NAME) == null<a name="line.881"></a>
-<span class="sourceLineNo">882</span>          &amp;&amp; conf.get(HConstants.ZK_CLIENT_KERBEROS_PRINCIPAL) == null<a name="line.882"></a>
-<span class="sourceLineNo">883</span>          &amp;&amp; conf.get(HConstants.ZK_SERVER_KERBEROS_PRINCIPAL) == null) {<a name="line.883"></a>
-<span class="sourceLineNo">884</span><a name="line.884"></a>
-<span class="sourceLineNo">885</span>        return false;<a name="line.885"></a>
-<span class="sourceLineNo">886</span>      }<a name="line.886"></a>
-<span class="sourceLineNo">887</span>    } catch(Exception e) {<a name="line.887"></a>
-<span class="sourceLineNo">888</span>      // No Jaas configuration defined.<a name="line.888"></a>
-<span class="sourceLineNo">889</span>      return false;<a name="line.889"></a>
-<span class="sourceLineNo">890</span>    }<a name="line.890"></a>
-<span class="sourceLineNo">891</span><a name="line.891"></a>
-<span class="sourceLineNo">892</span>    // Master &amp; RSs uses hbase.zookeeper.client.*<a name="line.892"></a>
-<span class="sourceLineNo">893</span>    return "kerberos".equalsIgnoreCase(conf.get("hbase.security.authentication"));<a name="line.893"></a>
-<span class="sourceLineNo">894</span>  }<a name="line.894"></a>
-<span class="sourceLineNo">895</span><a name="line.895"></a>
-<span class="sourceLineNo">896</span>  private static ArrayList&lt;ACL&gt; createACL(ZooKeeperWatcher zkw, String node) {<a name="line.896"></a>
-<span class="sourceLineNo">897</span>    return createACL(zkw, node, isSecureZooKeeper(zkw.getConfiguration()));<a name="line.897"></a>
-<span class="sourceLineNo">898</span>  }<a name="line.898"></a>
-<span class="sourceLineNo">899</span><a name="line.899"></a>
-<span class="sourceLineNo">900</span>  public static ArrayList&lt;ACL&gt; createACL(ZooKeeperWatcher zkw, String node,<a name="line.900"></a>
-<span class="sourceLineNo">901</span>    boolean isSecureZooKeeper) {<a name="line.901"></a>
-<span class="sourceLineNo">902</span>    if (!node.startsWith(zkw.znodePaths.baseZNode)) {<a name="line.902"></a>
-<span class="sourceLineNo">903</span>      return Ids.OPEN_ACL_UNSAFE;<a name="line.903"></a>
-<span class="sourceLineNo">904</span>    }<a name="line.904"></a>
-<span class="sourceLineNo">905</span>    if (isSecureZooKeeper) {<a name="line.905"></a>
-<span class="sourceLineNo">906</span>      ArrayList&lt;ACL&gt; acls = new ArrayList&lt;&gt;();<a name="line.906"></a>
-<span class="sourceLineNo">907</span>      // add permission to hbase supper user<a name="line.907"></a>
-<span class="sourceLineNo">908</span>      String[] superUsers = zkw.getConfiguration().getStrings(Superusers.SUPERUSER_CONF_KEY);<a name="line.908"></a>
-<span class="sourceLineNo">909</span>      if (superUsers != null) {<a name="line.909"></a>
-<span class="sourceLineNo">910</span>        List&lt;String&gt; groups = new ArrayList&lt;&gt;();<a name="line.910"></a>
-<span class="sourceLineNo">911</span>        for (String user : superUsers) {<a name="line.911"></a>
-<span class="sourceLineNo">912</span>          if (AuthUtil.isGroupPrincipal(user)) {<a name="line.912"></a>
-<span class="sourceLineNo">913</span>            // TODO: Set node ACL for groups when ZK supports this feature<a name="line.913"></a>
-<span class="sourceLineNo">914</span>            groups.add(user);<a name="line.914"></a>
-<span class="sourceLineNo">915</span>          } else {<a name="line.915"></a>
-<span class="sourceLineNo">916</span>            acls.add(new ACL(Perms.ALL, new Id("sasl", user)));<a name="line.916"></a>
-<span class="sourceLineNo">917</span>          }<a name="line.917"></a>
-<span class="sourceLineNo">918</span>        }<a name="line.918"></a>
-<span class="sourceLineNo">919</span>        if (!groups.isEmpty()) {<a name="line.919"></a>
-<span class="sourceLineNo">920</span>          LOG.warn("Znode ACL setting for group " + groups<a name="line.920"></a>
-<span class="sourceLineNo">921</span>              + " is skipped, ZooKeeper doesn't support this feature presently.");<a name="line.921"></a>
-<span class="sourceLineNo">922</span>        }<a name="line.922"></a>
-<span class="sourceLineNo">923</span>      }<a name="line.923"></a>
-<span class="sourceLineNo">924</span>      // Certain znodes are accessed directly by the client,<a name="line.924"></a>
-<span class="sourceLineNo">925</span>      // so they must be readable by non-authenticated clients<a name="line.925"></a>
-<span class="sourceLineNo">926</span>      if (zkw.isClientReadable(node)) {<a name="line.926"></a>
-<span class="sourceLineNo">927</span>        acls.addAll(Ids.CREATOR_ALL_ACL);<a name="line.927"></a>
-<span class="sourceLineNo">928</span>        acls.addAll(Ids.READ_ACL_UNSAFE);<a name="line.928"></a>
-<span class="sourceLineNo">929</span>      } else {<a name="line.929"></a>
-<span class="sourceLineNo">930</span>        acls.addAll(Ids.CREATOR_ALL_ACL);<a name="line.930"></a>
-<span class="sourceLineNo">931</span>      }<a name="line.931"></a>
-<span class="sourceLineNo">932</span>      return acls;<a name="line.932"></a>
-<span class="sourceLineNo">933</span>    } else {<a name="line.933"></a>
-<span class="sourceLineNo">934</span>      return Ids.OPEN_ACL_UNSAFE;<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>  //<a name="line.938"></a>
-<span class="sourceLineNo">939</span>  // Node creation<a name="line.939"></a>
-<span class="sourceLineNo">940</span>  //<a name="line.940"></a>
-<span class="sourceLineNo">941</span><a name="line.941"></a>
-<span class="sourceLineNo">942</span>  /**<a name="line.942"></a>
-<span class="sourceLineNo">943</span>   *<a name="line.943"></a>
-<span class="sourceLineNo">944</span>   * Set the specified znode to be an ephemeral node carrying the specified<a name="line.944"></a>
-<span class="sourceLineNo">945</span>   * data.<a name="line.945"></a>
-<span class="sourceLineNo">946</span>   *<a name="line.946"></a>
-<span class="sourceLineNo">947</span>   * If the node is created successfully, a watcher is also set on the node.<a name="line.947"></a>
-<span class="sourceLineNo">948</span>   *<a name="line.948"></a>
-<span class="sourceLineNo">949</span>   * If the node is not created successfully because it already exists, this<a name="line.949"></a>
-<span class="sourceLineNo">950</span>   * method will also set a watcher on the node.<a name="line.950"></a>
-<span class="sourceLineNo">951</span>   *<a name="line.951"></a>
-<span class="sourceLineNo">952</span>   * If there is another problem, a KeeperException will be thrown.<a name="line.952"></a>
-<span class="sourceLineNo">953</span>   *<a name="line.953"></a>
-<span class="sourceLineNo">954</span>   * @param zkw zk reference<a name="line.954"></a>
-<span class="sourceLineNo">955</span>   * @param znode path of node<a name="line.955"></a>
-<span class="sourceLineNo">956</span>   * @param data data of node<a name="line.956"></a>
-<span class="sourceLineNo">957</span>   * @return true if node created, false if not, watch set in both cases<a name="line.957"></a>
-<span class="sourceLineNo">958</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.958"></a>
-<span class="sourceLineNo">959</span>   */<a name="line.959"></a>
-<span class="sourceLineNo">960</span>  public static boolean createEphemeralNodeAndWatch(ZooKeeperWatcher zkw,<a name="line.960"></a>
-<span class="sourceLineNo">961</span>      String znode, byte [] data)<a name="line.961"></a>
-<span class="sourceLineNo">962</span>  throws KeeperException {<a name="line.962"></a>
-<span class="sourceLineNo">963</span>    boolean ret = true;<a name="line.963"></a>
-<span class="sourceLineNo">964</span>    try {<a name="line.964"></a>
-<span class="sourceLineNo">965</span>      zkw.getRecoverableZooKeeper().create(znode, data, createACL(zkw, znode),<a name="line.965"></a>
-<span class="sourceLineNo">966</span>          CreateMode.EPHEMERAL);<a name="line.966"></a>
-<span class="sourceLineNo">967</span>    } catch (KeeperException.NodeExistsException nee) {<a name="line.967"></a>
-<span class="sourceLineNo">968</span>      ret = false;<a name="line.968"></a>
-<span class="sourceLineNo">969</span>    } catch (InterruptedException e) {<a name="line.969"></a>
-<span class="sourceLineNo">970</span>      LOG.info("Interrupted", e);<a name="line.970"></a>
-<span class="sourceLineNo">971</span>      Thread.currentThread().interrupt();<a name="line.971"></a>
-<span class="sourceLineNo">972</span>    }<a name="line.972"></a>
-<span class="sourceLineNo">973</span>    if(!watchAndCheckExists(zkw, znode)) {<a name="line.973"></a>
-<span class="sourceLineNo">974</span>      // It did exist but now it doesn't, try again<a name="line.974"></a>
-<span class="sourceLineNo">975</span>      return createEphemeralNodeAndWatch(zkw, znode, data);<a name="line.975"></a>
-<span class="sourceLineNo">976</span>    }<a name="line.976"></a>
-<span class="sourceLineNo">977</span>    return ret;<a name="line.977"></a>
-<span class="sourceLineNo">978</span>  }<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>   * Creates the specified znode to be a persistent node carrying the specified<a name="line.981"></a>
-<span class="sourceLineNo">982</span>   * data.<a name="line.982"></a>
-<span class="sourceLineNo">983</span>   *<a name="line.983"></a>
-<span class="sourceLineNo">984</span>   * Returns true if the node was successfully created, false if the node<a name="line.984"></a>
-<span class="sourceLineNo">985</span>   * already existed.<a name="line.985"></a>
-<span class="sourceLineNo">986</span>   *<a name="line.986"></a>
-<span class="sourceLineNo">987</span>   * If the node is created successfully, a watcher is also set on the node.<a name="line.987"></a>
-<span class="sourceLineNo">988</span>   *<a name="line.988"></a>
-<span class="sourceLineNo">989</span>   * If the node is not created successfully because it already exists, this<a name="line.989"></a>
-<span class="sourceLineNo">990</span>   * method will also set a watcher on the node but return false.<a name="line.990"></a>
-<span class="sourceLineNo">991</span>   *<a name="line.991"></a>
-<span class="sourceLineNo">992</span>   * If there is another problem, a KeeperException will be thrown.<a name="line.992"></a>
-<span class="sourceLineNo">993</span>   *<a name="line.993"></a>
-<span class="sourceLineNo">994</span>   * @param zkw zk reference<a name="line.994"></a>
-<span class="sourceLineNo">995</span>   * @param znode path of node<a name="line.995"></a>
-<span class="sourceLineNo">996</span>   * @param data data of node<a name="line.996"></a>
-<span class="sourceLineNo">997</span>   * @return true if node created, false if not, watch set in both cases<a name="line.997"></a>
-<span class="sourceLineNo">998</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.998"></a>
-<span class="sourceLineNo">999</span>   */<a name="line.999"></a>
-<span class="sourceLineNo">1000</span>  public static boolean createNodeIfNotExistsAndWatch(<a name="line.1000"></a>
-<span class="sourceLineNo">1001</span>      ZooKeeperWatcher zkw, String znode, byte [] data)<a name="line.1001"></a>
-<span class="sourceLineNo">1002</span>  throws KeeperException {<a name="line.1002"></a>
-<span class="sourceLineNo">1003</span>    boolean ret = true;<a name="line.1003"></a>
-<span class="sourceLineNo">1004</span>    try {<a name="line.1004"></a>
-<span class="sourceLineNo">1005</span>      zkw.getRecoverableZooKeeper().create(znode, data, createACL(zkw, znode),<a name="line.1005"></a>
-<span class="sourceLineNo">1006</span>          CreateMode.PERSISTENT);<a name="line.1006"></a>
-<span class="sourceLineNo">1007</span>    } catch (KeeperException.NodeExistsException nee) {<a name="line.1007"></a>
-<span class="sourceLineNo">1008</span>      ret = false;<a name="line.1008"></a>
-<span class="sourceLineNo">1009</span>    } catch (InterruptedException e) {<a name="line.1009"></a>
-<span class="sourceLineNo">1010</span>      zkw.interruptedException(e);<a name="line.1010"></a>
-<span class="sourceLineNo">1011</span>      return false;<a name="line.1011"></a>
-<span class="sourceLineNo">1012</span>    }<a name="line.1012"></a>
-<span class="sourceLineNo">1013</span>    try {<a name="line.1013"></a>
-<span class="sourceLineNo">1014</span>      zkw.getRecoverableZooKeeper().exists(znode, zkw);<a name="line.1014"></a>
-<span class="sourceLineNo">1015</span>    } catch (InterruptedException e) {<a name="line.1015"></a>
-<span class="sourceLineNo">1016</span>      zkw.interruptedException(e);<a name="line.1016"></a>
-<span class="sourceLineNo">1017</span>      return false;<a name="line.1017"></a>
-<span class="sourceLineNo">1018</span>    }<a name="line.1018"></a>
-<span class="sourceLineNo">1019</span>    return ret;<a name="line.1019"></a>
-<span class="sourceLineNo">1020</span>  }<a name="line.1020"></a>
-<span class="sourceLineNo">1021</span><a name="line.1021"></a>
-<span class="sourceLineNo">1022</span>  /**<a name="line.1022"></a>
-<span class="sourceLineNo">1023</span>   * Creates the specified znode with the specified data but does not watch it.<a name="line.1023"></a>
-<span class="sourceLineNo">1024</span>   *<a name="line.1024"></a>
-<span class="sourceLineNo">1025</span>   * Returns the znode of the newly created node<a name="line.1025"></a>
-<span class="sourceLineNo">1026</span>   *<a name="line.1026"></a>
-<span class="sourceLineNo">1027</span>   * If there is another problem, a KeeperException will be thrown.<a name="line.1027"></a>
-<span class="sourceLineNo">1028</span>   *<a name="line.1028"></a>
-<span class="sourceLineNo">1029</span>   * @param zkw zk reference<a name="line.1029"></a>
-<span class="sourceLineNo">1030</span>   * @param znode path of node<a name="line.1030"></a>
-<span class="sourceLineNo">1031</span>   * @param data data of node<a name="line.1031"></a>
-<span class="sourceLineNo">1032</span>   * @param createMode specifying whether the node to be created is ephemeral and/or sequential<a name="line.1032"></a>
-<span class="sourceLineNo">1033</span>   * @return true name of the newly created znode or null<a name="line.1033"></a>
-<span class="sourceLineNo">1034</span>   * @throws KeeperException if unexpected zookeeper exception<a name="line.1034"></a>
-<span class="sourceLineNo">1035</span>   */<a 

<TRUNCATED>

Mime
View raw message