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| <h2 title="Class MasterAddressTracker" class="title">Class MasterAddressTracker</h2> |
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| <li><a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKListener.html" title="class in org.apache.hadoop.hbase.zookeeper">org.apache.hadoop.hbase.zookeeper.ZKListener</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKNodeTracker.html" title="class in org.apache.hadoop.hbase.zookeeper">org.apache.hadoop.hbase.zookeeper.ZKNodeTracker</a></li> |
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| <li>org.apache.hadoop.hbase.zookeeper.MasterAddressTracker</li> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.59">MasterAddressTracker</a> |
| extends <a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKNodeTracker.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKNodeTracker</a></pre> |
| <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="../../../../../org/apache/hadoop/hbase/zookeeper/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="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getMasterAddress--"><code>getMasterAddress()</code></a> or via |
| <a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#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> |
| </li> |
| </ul> |
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| <code><a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKNodeTracker.html#abortable">abortable</a>, <a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKNodeTracker.html#LOG">LOG</a>, <a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKNodeTracker.html#node">node</a></code></li> |
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| <code><a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKListener.html#watcher">watcher</a></code></li> |
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| <h3>Constructor Summary</h3> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#MasterAddressTracker-org.apache.hadoop.hbase.zookeeper.ZKWatcher-org.apache.hadoop.hbase.Abortable-">MasterAddressTracker</a></span>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> watcher, |
| <a href="../../../../../org/apache/hadoop/hbase/Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a> abortable)</code> |
| <div class="block">Construct a master address listener with the specified |
| <code>zookeeper</code> reference.</div> |
| </td> |
| </tr> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#deleteIfEquals-org.apache.hadoop.hbase.zookeeper.ZKWatcher-java.lang.String-">deleteIfEquals</a></span>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> content)</code> |
| <div class="block">delete the master znode if its content is same as the parameter</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getBackupMasterInfoPort-org.apache.hadoop.hbase.ServerName-">getBackupMasterInfoPort</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn)</code> |
| <div class="block">Get the info port of the backup master if it is available.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getBackupMasters--">getBackupMasters</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getBackupMastersAndRenewWatch-org.apache.hadoop.hbase.zookeeper.ZKWatcher-">getBackupMastersAndRenewWatch</a></span>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw)</code> |
| <div class="block">Retrieves the list of registered backup masters and renews a watch on the znode for children |
| updates.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getMasterAddress--">getMasterAddress</a></span>()</code> |
| <div class="block">Get the address of the current master if one is available.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getMasterAddress-boolean-">getMasterAddress</a></span>(boolean refresh)</code> |
| <div class="block">Get the address of the current master if one is available.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getMasterAddress-org.apache.hadoop.hbase.zookeeper.ZKWatcher-">getMasterAddress</a></span>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw)</code> |
| <div class="block">Get master address.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getMasterInfoPort--">getMasterInfoPort</a></span>()</code> |
| <div class="block">Get the info port of the current master of one is available.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getMasterInfoPort-org.apache.hadoop.hbase.zookeeper.ZKWatcher-">getMasterInfoPort</a></span>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw)</code> |
| <div class="block">Get master info port.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#hasMaster--">hasMaster</a></span>()</code> |
| <div class="block">Check if there is a master available.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>static org.apache.hadoop.hbase.shaded.protobuf.generated.ZooKeeperProtos.Master</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#parse-byte:A-">parse</a></span>(byte[] data)</code> </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#setMasterAddress-org.apache.hadoop.hbase.zookeeper.ZKWatcher-java.lang.String-org.apache.hadoop.hbase.ServerName-int-">setMasterAddress</a></span>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> znode, |
| <a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> master, |
| int infoPort)</code> |
| <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> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>(package private) static byte[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#toByteArray-org.apache.hadoop.hbase.ServerName-int-">toByteArray</a></span>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn, |
| int infoPort)</code> </td> |
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| <h3>Constructor Detail</h3> |
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| <h4>MasterAddressTracker</h4> |
| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.71">MasterAddressTracker</a>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> watcher, |
| <a href="../../../../../org/apache/hadoop/hbase/Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a> abortable)</pre> |
| <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="../../../../../org/apache/hadoop/hbase/zookeeper/ZKNodeTracker.html#start--"><code>ZKNodeTracker.start()</code></a> to |
| begin tracking of the master address.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>watcher</code> - zk reference and watcher</dd> |
| <dd><code>abortable</code> - abortable in case of fatal error</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="getMasterAddress--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getMasterAddress</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.80">getMasterAddress</a>()</pre> |
| <div class="block">Get the address of the current master if one is available. Returns null |
| if no current master.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Server name or null if timed out.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getMasterInfoPort--"> |
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| </a> |
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| <h4>getMasterInfoPort</h4> |
| <pre>public int <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.89">getMasterInfoPort</a>()</pre> |
| <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> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>info port or 0 if timed out</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getBackupMasterInfoPort-org.apache.hadoop.hbase.ServerName-"> |
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| </a> |
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| <h4>getBackupMasterInfoPort</h4> |
| <pre>public int <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.107">getBackupMasterInfoPort</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn)</pre> |
| <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> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>sn</code> - server name of backup master</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>info port or 0 if timed out or exceptions</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getMasterAddress-boolean-"> |
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| <h4>getMasterAddress</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.131">getMasterAddress</a>(boolean refresh)</pre> |
| <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> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>refresh</code> - whether to refresh the data by calling ZK directly.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Server name or null if timed out.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getMasterAddress-org.apache.hadoop.hbase.zookeeper.ZKWatcher-"> |
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| <h4>getMasterAddress</h4> |
| <pre>public static <a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.150">getMasterAddress</a>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw) |
| throws org.apache.zookeeper.KeeperException, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Get master address. |
| Use this instead of <a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getMasterAddress--"><code>getMasterAddress()</code></a> if you do not have an |
| instance of this tracker in your context.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>zkw</code> - ZKWatcher to use</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>ServerName stored in the the master address znode or null if no |
| znode present.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.zookeeper.KeeperException</code> - if a ZooKeeper operation fails</dd> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if the address of the ZooKeeper master cannot be retrieved</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getMasterInfoPort-org.apache.hadoop.hbase.zookeeper.ZKWatcher-"> |
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| <h4>getMasterInfoPort</h4> |
| <pre>public static int <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.182">getMasterInfoPort</a>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw) |
| throws org.apache.zookeeper.KeeperException, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Get master info port. |
| Use this instead of <a href="../../../../../org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#getMasterInfoPort--"><code>getMasterInfoPort()</code></a> if you do not have an |
| instance of this tracker in your context.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>zkw</code> - ZKWatcher to use</dd> |
| <dt><span class="returnLabel">Returns:</span></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><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.zookeeper.KeeperException</code> - if a ZooKeeper operation fails</dd> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if the address of the ZooKeeper master cannot be retrieved</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setMasterAddress-org.apache.hadoop.hbase.zookeeper.ZKWatcher-java.lang.String-org.apache.hadoop.hbase.ServerName-int-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>setMasterAddress</h4> |
| <pre>public static boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.213">setMasterAddress</a>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> znode, |
| <a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> master, |
| int infoPort) |
| throws org.apache.zookeeper.KeeperException</pre> |
| <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> |
| <dt><span class="paramLabel">Parameters:</span></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><span class="returnLabel">Returns:</span></dt> |
| <dd>true if node created, false if not; a watch is set in both cases</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.apache.zookeeper.KeeperException</code> - if a ZooKeeper operation fails</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="hasMaster--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>hasMaster</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.223">hasMaster</a>()</pre> |
| <div class="block">Check if there is a master available.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if there is a master set, false if not.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="toByteArray-org.apache.hadoop.hbase.ServerName-int-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>toByteArray</h4> |
| <pre>static byte[] <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.232">toByteArray</a>(<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> sn, |
| int infoPort)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>sn</code> - must not be null</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Content of the master znode as a serialized pb with the pb |
| magic as prefix.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="parse-byte:A-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>parse</h4> |
| <pre>public static org.apache.hadoop.hbase.shaded.protobuf.generated.ZooKeeperProtos.Master <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.249">parse</a>(byte[] data) |
| throws <a href="../../../../../org/apache/hadoop/hbase/exceptions/DeserializationException.html" title="class in org.apache.hadoop.hbase.exceptions">DeserializationException</a></pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>data</code> - zookeeper data. may be null</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>pb object of master, null if no active master</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/exceptions/DeserializationException.html" title="class in org.apache.hadoop.hbase.exceptions">DeserializationException</a></code> - if the parsing fails</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="deleteIfEquals-org.apache.hadoop.hbase.zookeeper.ZKWatcher-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>deleteIfEquals</h4> |
| <pre>public static boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.265">deleteIfEquals</a>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> content)</pre> |
| <div class="block">delete the master znode if its content is same as the parameter</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>zkw</code> - must not be null</dd> |
| <dd><code>content</code> - must not be null</dd> |
| </dl> |
| </li> |
| </ul> |
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| </a> |
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| <h4>getBackupMasters</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.286">getBackupMasters</a>() |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/InterruptedIOException.html?is-external=true" title="class or interface in java.io">InterruptedIOException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/InterruptedIOException.html?is-external=true" title="class or interface in java.io">InterruptedIOException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getBackupMastersAndRenewWatch-org.apache.hadoop.hbase.zookeeper.ZKWatcher-"> |
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| <h4>getBackupMastersAndRenewWatch</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/zookeeper/MasterAddressTracker.html#line.297">getBackupMastersAndRenewWatch</a>(<a href="../../../../../org/apache/hadoop/hbase/zookeeper/ZKWatcher.html" title="class in org.apache.hadoop.hbase.zookeeper">ZKWatcher</a> zkw) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/InterruptedIOException.html?is-external=true" title="class or interface in java.io">InterruptedIOException</a></pre> |
| <div class="block">Retrieves the list of registered backup masters and renews a watch on the znode for children |
| updates.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>zkw</code> - Zookeeper watcher to use</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>List of backup masters.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/InterruptedIOException.html?is-external=true" title="class or interface in java.io">InterruptedIOException</a></code> - if there is any issue fetching the required data from Zookeeper.</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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