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| <div class="subTitle">org.apache.hadoop.hbase.master.locking</div> |
| <h2 title="Class LockManager.MasterLock" class="title">Class LockManager.MasterLock</h2> |
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| <div class="contentContainer"> |
| <ul class="inheritance"> |
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| <li> |
| <ul class="inheritance"> |
| <li>org.apache.hadoop.hbase.master.locking.LockManager.MasterLock</li> |
| </ul> |
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| </ul> |
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| <dl> |
| <dt>Enclosing class:</dt> |
| <dd><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.html" title="class in org.apache.hadoop.hbase.master.locking">LockManager</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.html#line.81">LockManager.MasterLock</a> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Locks on namespace/table/regions. |
| Underneath, uses procedure framework and queues a <a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockProcedure.html" title="class in org.apache.hadoop.hbase.master.locking"><code>LockProcedure</code></a> which waits in a |
| queue until scheduled. |
| Use this lock instead LockManager.remoteLocks() for MASTER ONLY operations for two advantages: |
| - no need of polling on LockProcedure to check if lock was acquired. |
| - Generous timeout for lock preemption (default 10 min), no need to spawn thread for heartbeats. |
| (timeout configuration <a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockProcedure.html#DEFAULT_LOCAL_MASTER_LOCKS_TIMEOUT_MS"><code>LockProcedure.DEFAULT_LOCAL_MASTER_LOCKS_TIMEOUT_MS</code></a>).</div> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
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| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <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></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#description">description</a></span></code> </td> |
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| <tr class="rowColor"> |
| <td class="colFirst"><code>private <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></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#namespace">namespace</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockProcedure.html" title="class in org.apache.hadoop.hbase.master.locking">LockProcedure</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#proc">proc</a></span></code> </td> |
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| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#regionInfos">regionInfos</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#tableName">tableName</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/procedure2/LockType.html" title="enum in org.apache.hadoop.hbase.procedure2">LockType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#type">type</a></span></code> </td> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#MasterLock-org.apache.hadoop.hbase.client.RegionInfo:A-java.lang.String-">MasterLock</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>[] regionInfos, |
| <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> description)</code> </td> |
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| <a href="../../../../../../org/apache/hadoop/hbase/procedure2/LockType.html" title="enum in org.apache.hadoop.hbase.procedure2">LockType</a> type, |
| <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> description)</code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#MasterLock-org.apache.hadoop.hbase.TableName-org.apache.hadoop.hbase.procedure2.LockType-java.lang.String-">MasterLock</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName, |
| <a href="../../../../../../org/apache/hadoop/hbase/procedure2/LockType.html" title="enum in org.apache.hadoop.hbase.procedure2">LockType</a> type, |
| <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> description)</code> </td> |
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| <h3>Method Summary</h3> |
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| <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>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#acquire--">acquire</a></span>()</code> |
| <div class="block">Acquire the lock, waiting indefinitely until the lock is released or |
| the thread is interrupted.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>(package private) <a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockProcedure.html" title="class in org.apache.hadoop.hbase.master.locking">LockProcedure</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#getProc--">getProc</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#release--">release</a></span>()</code> |
| <div class="block">Release the lock.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><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></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#toString--">toString</a></span>()</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#tryAcquire-long-">tryAcquire</a></span>(long timeoutMs)</code> |
| <div class="block">Acquire the lock within a wait time.</div> |
| </td> |
| </tr> |
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| </ul> |
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| <a name="tableName"> |
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| <h4>tableName</h4> |
| <pre>private final <a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#line.83">tableName</a></pre> |
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| <pre>private final <a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>[] <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#line.84">regionInfos</a></pre> |
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| <h3>Constructor Detail</h3> |
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| </a> |
| <ul class="blockList"> |
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| <h4>MasterLock</h4> |
| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#line.90">MasterLock</a>(<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> namespace, |
| <a href="../../../../../../org/apache/hadoop/hbase/procedure2/LockType.html" title="enum in org.apache.hadoop.hbase.procedure2">LockType</a> type, |
| <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> description)</pre> |
| </li> |
| </ul> |
| <a name="MasterLock-org.apache.hadoop.hbase.TableName-org.apache.hadoop.hbase.procedure2.LockType-java.lang.String-"> |
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| <h4>MasterLock</h4> |
| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#line.99">MasterLock</a>(<a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName, |
| <a href="../../../../../../org/apache/hadoop/hbase/procedure2/LockType.html" title="enum in org.apache.hadoop.hbase.procedure2">LockType</a> type, |
| <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> description)</pre> |
| </li> |
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| <h4>MasterLock</h4> |
| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#line.108">MasterLock</a>(<a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>[] regionInfos, |
| <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> description)</pre> |
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| <h3>Method Detail</h3> |
| <a name="acquire--"> |
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| <h4>acquire</h4> |
| <pre>public boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#line.122">acquire</a>() |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></pre> |
| <div class="block">Acquire the lock, waiting indefinitely until the lock is released or |
| the thread is interrupted.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code> - If current thread is interrupted while |
| waiting for the lock</dd> |
| </dl> |
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| <a name="tryAcquire-long-"> |
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| <h4>tryAcquire</h4> |
| <pre>public boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#line.135">tryAcquire</a>(long timeoutMs) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></pre> |
| <div class="block">Acquire the lock within a wait time.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>timeoutMs</code> - The maximum time (in milliseconds) to wait for the lock, |
| 0 to wait indefinitely</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>True if the lock was acquired, false if waiting time elapsed |
| before the lock was acquired</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code> - If the thread is interrupted while waiting to |
| acquire the lock</dd> |
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| <h4>release</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#line.185">release</a>()</pre> |
| <div class="block">Release the lock. |
| No-op if the lock was never acquired.</div> |
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| <pre>public <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> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#line.193">toString</a>()</pre> |
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| <pre><a href="../../../../../../org/apache/hadoop/hbase/master/locking/LockProcedure.html" title="class in org.apache.hadoop.hbase.master.locking">LockProcedure</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/master/locking/LockManager.MasterLock.html#line.197">getProc</a>()</pre> |
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