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| <div class="subTitle">org.apache.hadoop.hbase.regionserver</div> |
| <h2 title="Class ServerNonceManager" class="title">Class ServerNonceManager</h2> |
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| <li>org.apache.hadoop.hbase.regionserver.ServerNonceManager</li> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.41">ServerNonceManager</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">Implementation of nonce manager that stores nonces in a hash map and cleans them up after |
| some time; if nonce group/client ID is supplied, nonces are stored by client ID.</div> |
| </li> |
| </ul> |
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| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.OperationContext.html" title="class in org.apache.hadoop.hbase.regionserver">ServerNonceManager.OperationContext</a></span></code> </td> |
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| </ul> |
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| <h3>Field Summary</h3> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#conflictWaitIterationMs">conflictWaitIterationMs</a></span></code> |
| <div class="block">The time to wait in an extremely unlikely case of a conflict with a running op.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#deleteNonceGracePeriod">deleteNonceGracePeriod</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <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/regionserver/ServerNonceManager.html#HASH_NONCE_GRACE_PERIOD_KEY">HASH_NONCE_GRACE_PERIOD_KEY</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentHashMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentHashMap</a><<a href="../../../../../org/apache/hadoop/hbase/util/NonceKey.html" title="class in org.apache.hadoop.hbase.util">NonceKey</a>,<a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.OperationContext.html" title="class in org.apache.hadoop.hbase.regionserver">ServerNonceManager.OperationContext</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#nonces">nonces</a></span></code> |
| <div class="block">Nonces.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html?is-external=true" title="class or interface in java.text">SimpleDateFormat</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#tsFormat">tsFormat</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#ServerNonceManager-org.apache.hadoop.conf.Configuration-">ServerNonceManager</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </td> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#addMvccToOperationContext-long-long-long-">addMvccToOperationContext</a></span>(long group, |
| long nonce, |
| long mvcc)</code> |
| <div class="block">Store the write point in OperationContext when the operation succeed.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#cleanUpOldNonces--">cleanUpOldNonces</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/ScheduledChore.html" title="class in org.apache.hadoop.hbase">ScheduledChore</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#createCleanupScheduledChore-org.apache.hadoop.hbase.Stoppable-">createCleanupScheduledChore</a></span>(<a href="../../../../../org/apache/hadoop/hbase/Stoppable.html" title="interface in org.apache.hadoop.hbase">Stoppable</a> stoppable)</code> |
| <div class="block">Creates a scheduled chore that is used to clean up old nonces.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#endOperation-long-long-boolean-">endOperation</a></span>(long group, |
| long nonce, |
| boolean success)</code> |
| <div class="block">Ends the operation started by startOperation.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#getMvccFromOperationContext-long-long-">getMvccFromOperationContext</a></span>(long group, |
| long nonce)</code> |
| <div class="block">Return the write point of the previous succeed operation.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#reportOperationFromWal-long-long-long-">reportOperationFromWal</a></span>(long group, |
| long nonce, |
| long writeTime)</code> |
| <div class="block">Reports the operation from WAL during replay.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#setConflictWaitIterationMs-int-">setConflictWaitIterationMs</a></span>(int conflictWaitIterationMs)</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#startOperation-long-long-org.apache.hadoop.hbase.Stoppable-">startOperation</a></span>(long group, |
| long nonce, |
| <a href="../../../../../org/apache/hadoop/hbase/Stoppable.html" title="interface in org.apache.hadoop.hbase">Stoppable</a> stoppable)</code> |
| <div class="block">Starts the operation if operation with such nonce has not already succeeded.</div> |
| </td> |
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| <h3>Methods inherited from class java.lang.<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></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
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| </div> |
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| <h3>Field Detail</h3> |
| <a name="HASH_NONCE_GRACE_PERIOD_KEY"> |
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| <li class="blockList"> |
| <h4>HASH_NONCE_GRACE_PERIOD_KEY</h4> |
| <pre>public static final <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/regionserver/ServerNonceManager.html#line.42">HASH_NONCE_GRACE_PERIOD_KEY</a></pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../constant-values.html#org.apache.hadoop.hbase.regionserver.ServerNonceManager.HASH_NONCE_GRACE_PERIOD_KEY">Constant Field Values</a></dd> |
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| <pre>private static final org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.43">LOG</a></pre> |
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| <pre>private int <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.47">conflictWaitIterationMs</a></pre> |
| <div class="block">The time to wait in an extremely unlikely case of a conflict with a running op. |
| Only here so that tests could override it and not wait.</div> |
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| <h4>nonces</h4> |
| <pre>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentHashMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentHashMap</a><<a href="../../../../../org/apache/hadoop/hbase/util/NonceKey.html" title="class in org.apache.hadoop.hbase.util">NonceKey</a>,<a href="../../../../../org/apache/hadoop/hbase/regionserver/ServerNonceManager.OperationContext.html" title="class in org.apache.hadoop.hbase.regionserver">ServerNonceManager.OperationContext</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.122">nonces</a></pre> |
| <div class="block">Nonces. |
| Approximate overhead per nonce: 64 bytes from hashmap, 32 from two objects (k/v), |
| NK: 16 bytes (2 longs), OC: 8 bytes (1 long) - so, 120 bytes. |
| With 30min expiration time, 5k increments/appends per sec., we'd use approximately 1Gb, |
| which is a realistic worst case. If it's much worse, we could use some sort of memory |
| limit and cleanup.</div> |
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| <pre>private int <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.124">deleteNonceGracePeriod</a></pre> |
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| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.126">ServerNonceManager</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
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| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.135">setConflictWaitIterationMs</a>(int conflictWaitIterationMs)</pre> |
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| <h4>startOperation</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.147">startOperation</a>(long group, |
| long nonce, |
| <a href="../../../../../org/apache/hadoop/hbase/Stoppable.html" title="interface in org.apache.hadoop.hbase">Stoppable</a> stoppable) |
| 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">Starts the operation if operation with such nonce has not already succeeded. If the |
| operation is in progress, waits for it to end and checks whether it has succeeded.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>group</code> - Nonce group.</dd> |
| <dd><code>nonce</code> - Nonce.</dd> |
| <dd><code>stoppable</code> - Stoppable that terminates waiting (if any) when the server is stopped.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the operation has not already succeeded and can proceed; false otherwise.</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></dd> |
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| <h4>endOperation</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.178">endOperation</a>(long group, |
| long nonce, |
| boolean success)</pre> |
| <div class="block">Ends the operation started by startOperation.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>group</code> - Nonce group.</dd> |
| <dd><code>nonce</code> - Nonce.</dd> |
| <dd><code>success</code> - Whether the operation has succeeded.</dd> |
| </dl> |
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| <h4>addMvccToOperationContext</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.206">addMvccToOperationContext</a>(long group, |
| long nonce, |
| long mvcc)</pre> |
| <div class="block">Store the write point in OperationContext when the operation succeed.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>group</code> - Nonce group.</dd> |
| <dd><code>nonce</code> - Nonce.</dd> |
| <dd><code>mvcc</code> - Write point of the succeed operation.</dd> |
| </dl> |
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| <h4>getMvccFromOperationContext</h4> |
| <pre>public long <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.224">getMvccFromOperationContext</a>(long group, |
| long nonce)</pre> |
| <div class="block">Return the write point of the previous succeed operation.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>group</code> - Nonce group.</dd> |
| <dd><code>nonce</code> - Nonce.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>write point of the previous succeed operation.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.239">reportOperationFromWal</a>(long group, |
| long nonce, |
| long writeTime)</pre> |
| <div class="block">Reports the operation from WAL during replay.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>group</code> - Nonce group.</dd> |
| <dd><code>nonce</code> - Nonce.</dd> |
| <dd><code>writeTime</code> - Entry write time, used to ignore entries that are too old.</dd> |
| </dl> |
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| <a name="createCleanupScheduledChore-org.apache.hadoop.hbase.Stoppable-"> |
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| <h4>createCleanupScheduledChore</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/ScheduledChore.html" title="class in org.apache.hadoop.hbase">ScheduledChore</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.261">createCleanupScheduledChore</a>(<a href="../../../../../org/apache/hadoop/hbase/Stoppable.html" title="interface in org.apache.hadoop.hbase">Stoppable</a> stoppable)</pre> |
| <div class="block">Creates a scheduled chore that is used to clean up old nonces.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>stoppable</code> - Stoppable for the chore.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>ScheduledChore; the scheduled chore is not started.</dd> |
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| <h4>cleanUpOldNonces</h4> |
| <pre>private void <a href="../../../../../src-html/org/apache/hadoop/hbase/regionserver/ServerNonceManager.html#line.271">cleanUpOldNonces</a>()</pre> |
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