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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.hadoop.hbase.zookeeper</a></div> |
| <h1 title="Class MasterAddressTracker" class="title">Class MasterAddressTracker</h1> |
| </div> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a> |
| <div class="inheritance"><a href="ZKListener.html" title="class in org.apache.hadoop.hbase.zookeeper">org.apache.hadoop.hbase.zookeeper.ZKListener</a> |
| <div class="inheritance"><a href="ZKNodeTracker.html" title="class in org.apache.hadoop.hbase.zookeeper">org.apache.hadoop.hbase.zookeeper.ZKNodeTracker</a> |
| <div class="inheritance">org.apache.hadoop.hbase.zookeeper.MasterAddressTracker</div> |
| </div> |
| </div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <hr> |
| <div class="type-signature"><span class="annotations">@Private |
| </span><span class="modifiers">public class </span><span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-57">MasterAddressTracker</a></span> |
| <span class="extends-implements">extends <a href="ZKNodeTracker.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKNodeTracker</a></span></div> |
| <div class="block">Manages the location of the current active Master for the RegionServer. |
| <p> |
| Listens for ZooKeeper events related to the master address. The node <code>/master</code> will |
| contain the address of the current master. This listener is interested in |
| <code>NodeDeleted</code> and <code>NodeCreated</code> events on <code>/master</code>. |
| <p> |
| Utilizes <a href="ZKNodeTracker.html" title="class in org.apache.hadoop.hbase.zookeeper"><code>ZKNodeTracker</code></a> for zk interactions. |
| <p> |
| You can get the current master via <a href="#getMasterAddress()"><code>getMasterAddress()</code></a> or via |
| <a href="#getMasterAddress(org.apache.hadoop.hbase.zookeeper.ZKWatcher)"><code>getMasterAddress(ZKWatcher)</code></a> if you do not have a running instance of this Tracker in |
| your context. |
| <p> |
| This class also includes utility for interacting with the master znode, for writing and reading |
| the znode content.</div> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- =========== FIELD SUMMARY =========== --> |
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| <section class="field-summary" id="field-summary"> |
| <h2>Field Summary</h2> |
| <div class="caption"><span>Fields</span></div> |
| <div class="summary-table three-column-summary"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Field</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>private <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></code></div> |
| <div class="col-second even-row-color"><code><a href="#backupMasters" class="member-name-link">backupMasters</a></code></div> |
| <div class="col-last even-row-color"> </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="fields-inherited-from-class-org.apache.hadoop.hbase.zookeeper.ZKNodeTracker">Fields inherited from class org.apache.hadoop.hbase.zookeeper.<a href="ZKNodeTracker.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKNodeTracker</a></h3> |
| <code><a href="ZKNodeTracker.html#abortable">abortable</a>, <a href="ZKNodeTracker.html#LOG">LOG</a>, <a href="ZKNodeTracker.html#node">node</a></code></div> |
| <div class="inherited-list"> |
| <h3 id="fields-inherited-from-class-org.apache.hadoop.hbase.zookeeper.ZKListener">Fields inherited from class org.apache.hadoop.hbase.zookeeper.<a href="ZKListener.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKListener</a></h3> |
| <code><a href="ZKListener.html#watcher">watcher</a></code></div> |
| </section> |
| </li> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <li> |
| <section class="constructor-summary" id="constructor-summary"> |
| <h2>Constructor Summary</h2> |
| <div class="caption"><span>Constructors</span></div> |
| <div class="summary-table two-column-summary"> |
| <div class="table-header col-first">Constructor</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E(org.apache.hadoop.hbase.zookeeper.ZKWatcher,org.apache.hadoop.hbase.Abortable)" class="member-name-link">MasterAddressTracker</a><wbr>(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> watcher, |
| <a href="../Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a> abortable)</code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">Construct a master address listener with the specified <code>zookeeper</code> reference.</div> |
| </div> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <li> |
| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
| <div id="method-summary-table"> |
| <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div> |
| <div id="method-summary-table.tabpanel" role="tabpanel"> |
| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static boolean</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#deleteIfEquals(org.apache.hadoop.hbase.zookeeper.ZKWatcher,java.lang.String)" class="member-name-link">deleteIfEquals</a><wbr>(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> content)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">delete the master znode if its content is same as the parameter</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getBackupMasterInfoPort(org.apache.hadoop.hbase.ServerName)" class="member-name-link">getBackupMasterInfoPort</a><wbr>(<a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Get the info port of the backup master if it is available.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static int</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#getBackupMasterInfoPort(org.apache.hadoop.hbase.zookeeper.ZKWatcher,org.apache.hadoop.hbase.ServerName)" class="member-name-link">getBackupMasterInfoPort</a><wbr>(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw, |
| <a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">Get backup master info port.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getBackupMasters()" class="member-name-link">getBackupMasters</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#getBackupMastersAndRenewWatch(org.apache.hadoop.hbase.zookeeper.ZKWatcher)" class="member-name-link">getBackupMastersAndRenewWatch</a><wbr>(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">Retrieves the list of registered backup masters and renews a watch on the znode for children |
| updates.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getMasterAddress()" class="member-name-link">getMasterAddress</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Get the address of the current master if one is available.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getMasterAddress(boolean)" class="member-name-link">getMasterAddress</a><wbr>(boolean refresh)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Get the address of the current master if one is available.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static <a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#getMasterAddress(org.apache.hadoop.hbase.zookeeper.ZKWatcher)" class="member-name-link">getMasterAddress</a><wbr>(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">Get master address.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getMasterInfoPort()" class="member-name-link">getMasterInfoPort</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Get the info port of the current master of one is available.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static int</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#getMasterInfoPort(org.apache.hadoop.hbase.zookeeper.ZKWatcher)" class="member-name-link">getMasterInfoPort</a><wbr>(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">Get master info port.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#hasMaster()" class="member-name-link">hasMaster</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Check if there is a master available.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>private void</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#loadBackupMasters()" class="member-name-link">loadBackupMasters</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#nodeChildrenChanged(java.lang.String)" class="member-name-link">nodeChildrenChanged</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> path)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Called when an existing node has a child node added or removed.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static org.apache.hadoop.hbase.shaded.protobuf.generated.ZooKeeperProtos.Master</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#parse(byte%5B%5D)" class="member-name-link">parse</a><wbr>(byte[] data)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#postStart()" class="member-name-link">postStart</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Called after start is called.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static boolean</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#setMasterAddress(org.apache.hadoop.hbase.zookeeper.ZKWatcher,java.lang.String,org.apache.hadoop.hbase.ServerName,int)" class="member-name-link">setMasterAddress</a><wbr>(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> znode, |
| <a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> master, |
| int infoPort)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> |
| <div class="block">Set master address into the <code>master</code> znode or into the backup subdirectory of backup |
| masters; switch off the passed in <code>znode</code> path.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>(package private) static byte[]</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#toByteArray(org.apache.hadoop.hbase.ServerName,int)" class="member-name-link">toByteArray</a><wbr>(<a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn, |
| int infoPort)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> </div> |
| </div> |
| </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-org.apache.hadoop.hbase.zookeeper.ZKNodeTracker">Methods inherited from class org.apache.hadoop.hbase.zookeeper.<a href="ZKNodeTracker.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKNodeTracker</a></h3> |
| <code><a href="ZKNodeTracker.html#blockUntilAvailable()">blockUntilAvailable</a>, <a href="ZKNodeTracker.html#blockUntilAvailable(long,boolean)">blockUntilAvailable</a>, <a href="ZKNodeTracker.html#checkIfBaseNodeAvailable()">checkIfBaseNodeAvailable</a>, <a href="ZKNodeTracker.html#getData(boolean)">getData</a>, <a href="ZKNodeTracker.html#getNode()">getNode</a>, <a href="ZKNodeTracker.html#nodeCreated(java.lang.String)">nodeCreated</a>, <a href="ZKNodeTracker.html#nodeDataChanged(java.lang.String)">nodeDataChanged</a>, <a href="ZKNodeTracker.html#nodeDeleted(java.lang.String)">nodeDeleted</a>, <a href="ZKNodeTracker.html#start()">start</a>, <a href="ZKNodeTracker.html#stop()">stop</a>, <a href="ZKNodeTracker.html#toString()">toString</a></code></div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-org.apache.hadoop.hbase.zookeeper.ZKListener">Methods inherited from class org.apache.hadoop.hbase.zookeeper.<a href="ZKListener.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKListener</a></h3> |
| <code><a href="ZKListener.html#getWatcher()">getWatcher</a></code></div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3> |
| <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <li> |
| <section class="field-details" id="field-detail"> |
| <h2>Field Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="backupMasters"> |
| <h3>backupMasters</h3> |
| <div class="member-signature"><span class="modifiers">private volatile</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-60">backupMasters</a></span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li> |
| <section class="constructor-details" id="constructor-detail"> |
| <h2>Constructor Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="<init>(org.apache.hadoop.hbase.zookeeper.ZKWatcher,org.apache.hadoop.hbase.Abortable)"> |
| <h3>MasterAddressTracker</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-70">MasterAddressTracker</a></span><wbr><span class="parameters">(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> watcher, |
| <a href="../Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a> abortable)</span></div> |
| <div class="block">Construct a master address listener with the specified <code>zookeeper</code> reference. |
| <p> |
| This constructor does not trigger any actions, you must call methods explicitly. Normally you |
| will just want to execute <a href="ZKNodeTracker.html#start()"><code>ZKNodeTracker.start()</code></a> to begin tracking of the master address.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>watcher</code> - zk reference and watcher</dd> |
| <dd><code>abortable</code> - abortable in case of fatal error</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="loadBackupMasters()"> |
| <h3>loadBackupMasters</h3> |
| <div class="member-signature"><span class="modifiers">private</span> <span class="return-type">void</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-74">loadBackupMasters</a></span>()</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="postStart()"> |
| <h3>postStart</h3> |
| <div class="member-signature"><span class="modifiers">protected</span> <span class="return-type">void</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-84">postStart</a></span>()</div> |
| <div class="block"><span class="descfrm-type-label">Description copied from class: <code><a href="ZKNodeTracker.html#postStart()">ZKNodeTracker</a></code></span></div> |
| <div class="block">Called after start is called. Sub classes could implement this method to load more data on zk.</div> |
| <dl class="notes"> |
| <dt>Overrides:</dt> |
| <dd><code><a href="ZKNodeTracker.html#postStart()">postStart</a></code> in class <code><a href="ZKNodeTracker.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKNodeTracker</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="nodeChildrenChanged(java.lang.String)"> |
| <h3>nodeChildrenChanged</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-89">nodeChildrenChanged</a></span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> path)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from class: <code><a href="ZKListener.html#nodeChildrenChanged(java.lang.String)">ZKListener</a></code></span></div> |
| <div class="block">Called when an existing node has a child node added or removed.</div> |
| <dl class="notes"> |
| <dt>Overrides:</dt> |
| <dd><code><a href="ZKListener.html#nodeChildrenChanged(java.lang.String)">nodeChildrenChanged</a></code> in class <code><a href="ZKListener.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKListener</a></code></dd> |
| <dt>Parameters:</dt> |
| <dd><code>path</code> - full path of the node whose children have changed</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getMasterAddress()"> |
| <h3>getMasterAddress</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-100">getMasterAddress</a></span>()</div> |
| <div class="block">Get the address of the current master if one is available. Returns null if no current master.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>Server name or null if timed out.</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getMasterInfoPort()"> |
| <h3>getMasterInfoPort</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-109">getMasterInfoPort</a></span>()</div> |
| <div class="block">Get the info port of the current master of one is available. Return 0 if no current master or |
| zookeeper is unavailable</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>info port or 0 if timed out</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getBackupMasterInfoPort(org.apache.hadoop.hbase.ServerName)"> |
| <h3>getBackupMasterInfoPort</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-128">getBackupMasterInfoPort</a></span><wbr><span class="parameters">(<a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn)</span></div> |
| <div class="block">Get the info port of the backup master if it is available. Return 0 if no backup master or |
| zookeeper is unavailable</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>sn</code> - server name of backup master</dd> |
| <dt>Returns:</dt> |
| <dd>info port or 0 if timed out or exceptions</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getMasterAddress(boolean)"> |
| <h3>getMasterAddress</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-150">getMasterAddress</a></span><wbr><span class="parameters">(boolean refresh)</span></div> |
| <div class="block">Get the address of the current master if one is available. Returns null if no current master. |
| If refresh is set, try to load the data from ZK again, otherwise, cached data will be used.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>refresh</code> - whether to refresh the data by calling ZK directly.</dd> |
| <dt>Returns:</dt> |
| <dd>Server name or null if timed out.</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getMasterAddress(org.apache.hadoop.hbase.zookeeper.ZKWatcher)"> |
| <h3>getMasterAddress</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type"><a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-167">getMasterAddress</a></span><wbr><span class="parameters">(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw)</span> |
| throws <span class="exceptions">org.apache.zookeeper.KeeperException, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div> |
| <div class="block">Get master address. Use this instead of <a href="#getMasterAddress()"><code>getMasterAddress()</code></a> if you do not have an |
| instance of this tracker in your context.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>zkw</code> - ZKWatcher to use</dd> |
| <dt>Returns:</dt> |
| <dd>ServerName stored in the the master address znode or null if no znode present.</dd> |
| <dt>Throws:</dt> |
| <dd><code>org.apache.zookeeper.KeeperException</code> - if a ZooKeeper operation fails</dd> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code> - if the address of the ZooKeeper master cannot be retrieved</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getMasterInfoPort(org.apache.hadoop.hbase.zookeeper.ZKWatcher)"> |
| <h3>getMasterInfoPort</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-197">getMasterInfoPort</a></span><wbr><span class="parameters">(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw)</span> |
| throws <span class="exceptions">org.apache.zookeeper.KeeperException, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div> |
| <div class="block">Get master info port. Use this instead of <a href="#getMasterInfoPort()"><code>getMasterInfoPort()</code></a> if you do not have an |
| instance of this tracker in your context.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>zkw</code> - ZKWatcher to use</dd> |
| <dt>Returns:</dt> |
| <dd>master info port in the the master address znode or null if no znode present. // TODO |
| can't return null for 'int' return type. non-static verison returns 0</dd> |
| <dt>Throws:</dt> |
| <dd><code>org.apache.zookeeper.KeeperException</code> - if a ZooKeeper operation fails</dd> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code> - if the address of the ZooKeeper master cannot be retrieved</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getBackupMasterInfoPort(org.apache.hadoop.hbase.zookeeper.ZKWatcher,org.apache.hadoop.hbase.ServerName)"> |
| <h3>getBackupMasterInfoPort</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-226">getBackupMasterInfoPort</a></span><wbr><span class="parameters">(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw, |
| <a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn)</span> |
| throws <span class="exceptions">org.apache.zookeeper.KeeperException, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div> |
| <div class="block">Get backup master info port. Use this instead of <a href="#getBackupMasterInfoPort(org.apache.hadoop.hbase.ServerName)"><code>getBackupMasterInfoPort(ServerName)</code></a> |
| if you do not have an instance of this tracker in your context.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>zkw</code> - ZKWatcher to use</dd> |
| <dd><code>sn</code> - ServerName of the backup master</dd> |
| <dt>Returns:</dt> |
| <dd>backup master info port in the the master address znode or 0 if no znode present.</dd> |
| <dt>Throws:</dt> |
| <dd><code>org.apache.zookeeper.KeeperException</code> - if a ZooKeeper operation fails</dd> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code> - if the address of the ZooKeeper master cannot be retrieved</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="setMasterAddress(org.apache.hadoop.hbase.zookeeper.ZKWatcher,java.lang.String,org.apache.hadoop.hbase.ServerName,int)"> |
| <h3>setMasterAddress</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type">boolean</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-261">setMasterAddress</a></span><wbr><span class="parameters">(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> znode, |
| <a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> master, |
| int infoPort)</span> |
| throws <span class="exceptions">org.apache.zookeeper.KeeperException</span></div> |
| <div class="block">Set master address into the <code>master</code> znode or into the backup subdirectory of backup |
| masters; switch off the passed in <code>znode</code> path.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>zkw</code> - The ZKWatcher to use.</dd> |
| <dd><code>znode</code> - Where to create the znode; could be at the top level or it could be under backup |
| masters</dd> |
| <dd><code>master</code> - ServerName of the current master must not be null.</dd> |
| <dt>Returns:</dt> |
| <dd>true if node created, false if not; a watch is set in both cases</dd> |
| <dt>Throws:</dt> |
| <dd><code>org.apache.zookeeper.KeeperException</code> - if a ZooKeeper operation fails</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="hasMaster()"> |
| <h3>hasMaster</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">boolean</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-270">hasMaster</a></span>()</div> |
| <div class="block">Check if there is a master available.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>true if there is a master set, false if not.</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="toByteArray(org.apache.hadoop.hbase.ServerName,int)"> |
| <h3>toByteArray</h3> |
| <div class="member-signature"><span class="modifiers">static</span> <span class="return-type">byte[]</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-278">toByteArray</a></span><wbr><span class="parameters">(<a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn, |
| int infoPort)</span></div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>sn</code> - must not be null</dd> |
| <dt>Returns:</dt> |
| <dd>Content of the master znode as a serialized pb with the pb magic as prefix.</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="parse(byte[])"> |
| <h3>parse</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type">org.apache.hadoop.hbase.shaded.protobuf.generated.ZooKeeperProtos.Master</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-295">parse</a></span><wbr><span class="parameters">(byte[] data)</span> |
| throws <span class="exceptions"><a href="../exceptions/DeserializationException.html" title="class in org.apache.hadoop.hbase.exceptions">DeserializationException</a></span></div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>data</code> - zookeeper data. may be null</dd> |
| <dt>Returns:</dt> |
| <dd>pb object of master, null if no active master</dd> |
| <dt>Throws:</dt> |
| <dd><code><a href="../exceptions/DeserializationException.html" title="class in org.apache.hadoop.hbase.exceptions">DeserializationException</a></code> - if the parsing fails</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="deleteIfEquals(org.apache.hadoop.hbase.zookeeper.ZKWatcher,java.lang.String)"> |
| <h3>deleteIfEquals</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type">boolean</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-312">deleteIfEquals</a></span><wbr><span class="parameters">(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> content)</span></div> |
| <div class="block">delete the master znode if its content is same as the parameter</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>zkw</code> - must not be null</dd> |
| <dd><code>content</code> - must not be null</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getBackupMasters()"> |
| <h3>getBackupMasters</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-333">getBackupMasters</a></span>()</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getBackupMastersAndRenewWatch(org.apache.hadoop.hbase.zookeeper.ZKWatcher)"> |
| <h3>getBackupMastersAndRenewWatch</h3> |
| <div class="member-signature"><span class="modifiers">public static</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="../ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line-344">getBackupMastersAndRenewWatch</a></span><wbr><span class="parameters">(<a href="ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw)</span> |
| throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/InterruptedIOException.html" title="class or interface in java.io" class="external-link">InterruptedIOException</a></span></div> |
| <div class="block">Retrieves the list of registered backup masters and renews a watch on the znode for children |
| updates.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>zkw</code> - Zookeeper watcher to use</dd> |
| <dt>Returns:</dt> |
| <dd>List of backup masters.</dd> |
| <dt>Throws:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/InterruptedIOException.html" title="class or interface in java.io" class="external-link">InterruptedIOException</a></code> - if there is any issue fetching the required data from Zookeeper.</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
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