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| <div class="subTitle">org.apache.hadoop.hbase.coprocessor.example</div> |
| <h2 title="Class WriteHeavyIncrementObserver" class="title">Class WriteHeavyIncrementObserver</h2> |
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| <li>org.apache.hadoop.hbase.coprocessor.example.WriteHeavyIncrementObserver</li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html" title="interface in org.apache.hadoop.hbase">Coprocessor</a>, <a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessor</a>, <a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></dd> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.68">WriteHeavyIncrementObserver</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> |
| implements <a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessor</a>, <a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></pre> |
| <div class="block">An example for implementing a counter that reads is much less than writes, i.e, write heavy. |
| <p> |
| We will convert increment to put, and do aggregating when get. And of course the return value of |
| increment is useless then. |
| <p> |
| Notice that this is only an example so we do not handle most corner cases, for example, you must |
| provide a qualifier when doing a get.</div> |
| </li> |
| </ul> |
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| <!-- --> |
| </a> |
| <h3>Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.<a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html" title="interface in org.apache.hadoop.hbase">Coprocessor</a></h3> |
| <code><a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.State.html" title="enum in org.apache.hadoop.hbase">Coprocessor.State</a></code></li> |
| </ul> |
| <ul class="blockList"> |
| <li class="blockList"><a name="nested.classes.inherited.from.class.org.apache.hadoop.hbase.coprocessor.RegionObserver"> |
| <!-- --> |
| </a> |
| <h3>Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.coprocessor.<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></h3> |
| <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.MutationType.html" title="enum in org.apache.hadoop.hbase.coprocessor">RegionObserver.MutationType</a></code></li> |
| </ul> |
| </li> |
| </ul> |
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| <h3>Field Summary</h3> |
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| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private org.apache.commons.lang3.mutable.MutableLong[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#lastTimestamps">lastTimestamps</a></span></code> </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/coprocessor/example/WriteHeavyIncrementObserver.html#mask">mask</a></span></code> </td> |
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| <li class="blockList"><a name="fields.inherited.from.class.org.apache.hadoop.hbase.Coprocessor"> |
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| </a> |
| <h3>Fields inherited from interface org.apache.hadoop.hbase.<a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html" title="interface in org.apache.hadoop.hbase">Coprocessor</a></h3> |
| <code><a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html#PRIORITY_HIGHEST">PRIORITY_HIGHEST</a>, <a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html#PRIORITY_LOWEST">PRIORITY_LOWEST</a>, <a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html#PRIORITY_SYSTEM">PRIORITY_SYSTEM</a>, <a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html#PRIORITY_USER">PRIORITY_USER</a>, <a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html#VERSION">VERSION</a></code></li> |
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| <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/coprocessor/example/WriteHeavyIncrementObserver.html#WriteHeavyIncrementObserver--">WriteHeavyIncrementObserver</a></span>()</code> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
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| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</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>private <a href="../../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#createCell-byte:A-byte:A-byte:A-long-long-">createCell</a></span>(byte[] row, |
| byte[] family, |
| byte[] qualifier, |
| long ts, |
| long value)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#getRegionObserver--">getRegionObserver</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#getUniqueTimestamp-byte:A-">getUniqueTimestamp</a></span>(byte[] row)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#preCompact-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-">preCompact</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> scanner, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanType.html" title="enum in org.apache.hadoop.hbase.regionserver">ScanType</a> scanType, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionLifeCycleTracker.html" title="interface in org.apache.hadoop.hbase.regionserver.compactions">CompactionLifeCycleTracker</a> tracker, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionRequest.html" title="interface in org.apache.hadoop.hbase.regionserver.compactions">CompactionRequest</a> request)</code> |
| <div class="block">Called prior to writing the <a href="../../../../../../org/apache/hadoop/hbase/regionserver/StoreFile.html" title="interface in org.apache.hadoop.hbase.regionserver"><code>StoreFile</code></a>s selected for compaction into a new |
| <code>StoreFile</code>.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#preCompactScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-">preCompactScannerOpen</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanType.html" title="enum in org.apache.hadoop.hbase.regionserver">ScanType</a> scanType, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanOptions.html" title="interface in org.apache.hadoop.hbase.regionserver">ScanOptions</a> options, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionLifeCycleTracker.html" title="interface in org.apache.hadoop.hbase.regionserver.compactions">CompactionLifeCycleTracker</a> tracker, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionRequest.html" title="interface in org.apache.hadoop.hbase.regionserver.compactions">CompactionRequest</a> request)</code> |
| <div class="block">Called before we open store scanner for compaction.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#preFlush-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">preFlush</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> scanner, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/FlushLifeCycleTracker.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushLifeCycleTracker</a> tracker)</code> |
| <div class="block">Called before a Store's memstore is flushed to disk.</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/coprocessor/example/WriteHeavyIncrementObserver.html#preFlushScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">preFlushScannerOpen</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanOptions.html" title="interface in org.apache.hadoop.hbase.regionserver">ScanOptions</a> options, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/FlushLifeCycleTracker.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushLifeCycleTracker</a> tracker)</code> |
| <div class="block">Called before we open store scanner for flush.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#preGetOp-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.Get-java.util.List-">preGetOp</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/Get.html" title="class in org.apache.hadoop.hbase.client">Get</a> get, |
| <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/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a>> result)</code> |
| <div class="block">Called before the client performs a Get</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#preIncrement-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.Increment-">preIncrement</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/Increment.html" title="class in org.apache.hadoop.hbase.client">Increment</a> increment)</code> |
| <div class="block">Called before Increment.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#preMemStoreCompactionCompact-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-">preMemStoreCompactionCompact</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> scanner)</code> |
| <div class="block">Called before we do in memory compaction.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
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| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessor.html#getRegionObserver--">getRegionObserver</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessor</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="preFlushScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>preFlushScannerOpen</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.76">preFlushScannerOpen</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanOptions.html" title="interface in org.apache.hadoop.hbase.regionserver">ScanOptions</a> options, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/FlushLifeCycleTracker.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushLifeCycleTracker</a> tracker) |
| throws <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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preFlushScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">RegionObserver</a></code></span></div> |
| <div class="block">Called before we open store scanner for flush. You can use the <code>options</code> to change max |
| versions and TTL for the scanner being opened.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preFlushScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">preFlushScannerOpen</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - the environment provided by the region server</dd> |
| <dd><code>store</code> - the store where flush is being requested</dd> |
| <dd><code>options</code> - used to change max versions and TTL for the scanner being opened</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <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></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="createCell-byte:A-byte:A-byte:A-long-long-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>createCell</h4> |
| <pre>private <a href="../../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.81">createCell</a>(byte[] row, |
| byte[] family, |
| byte[] qualifier, |
| long ts, |
| long value)</pre> |
| </li> |
| </ul> |
| <a name="wrap-byte:A-org.apache.hadoop.hbase.regionserver.InternalScanner-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>wrap</h4> |
| <pre>private <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.87">wrap</a>(byte[] family, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> scanner)</pre> |
| </li> |
| </ul> |
| <a name="preFlush-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>preFlush</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.146">preFlush</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> scanner, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/FlushLifeCycleTracker.html" title="interface in org.apache.hadoop.hbase.regionserver">FlushLifeCycleTracker</a> tracker) |
| throws <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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preFlush-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">RegionObserver</a></code></span></div> |
| <div class="block">Called before a Store's memstore is flushed to disk.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preFlush-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">preFlush</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - the environment provided by the region server</dd> |
| <dd><code>store</code> - the store where flush is being requested</dd> |
| <dd><code>scanner</code> - the scanner over existing data used in the memstore</dd> |
| <dd><code>tracker</code> - tracker used to track the life cycle of a flush</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the scanner to use during flush. Should not be <code>null</code> unless the implementation |
| is writing new store files on its own.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <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></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="preCompactScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>preCompactScannerOpen</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.152">preCompactScannerOpen</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanType.html" title="enum in org.apache.hadoop.hbase.regionserver">ScanType</a> scanType, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanOptions.html" title="interface in org.apache.hadoop.hbase.regionserver">ScanOptions</a> options, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionLifeCycleTracker.html" title="interface in org.apache.hadoop.hbase.regionserver.compactions">CompactionLifeCycleTracker</a> tracker, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionRequest.html" title="interface in org.apache.hadoop.hbase.regionserver.compactions">CompactionRequest</a> request) |
| throws <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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preCompactScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-">RegionObserver</a></code></span></div> |
| <div class="block">Called before we open store scanner for compaction. You can use the <code>options</code> to change max |
| versions and TTL for the scanner being opened.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preCompactScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-">preCompactScannerOpen</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - the environment provided by the region server</dd> |
| <dd><code>store</code> - the store being compacted</dd> |
| <dd><code>scanType</code> - type of Scan</dd> |
| <dd><code>options</code> - used to change max versions and TTL for the scanner being opened</dd> |
| <dd><code>tracker</code> - tracker used to track the life cycle of a compaction</dd> |
| <dd><code>request</code> - the requested compaction</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <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></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="preCompact-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>preCompact</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.159">preCompact</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> scanner, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanType.html" title="enum in org.apache.hadoop.hbase.regionserver">ScanType</a> scanType, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionLifeCycleTracker.html" title="interface in org.apache.hadoop.hbase.regionserver.compactions">CompactionLifeCycleTracker</a> tracker, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionRequest.html" title="interface in org.apache.hadoop.hbase.regionserver.compactions">CompactionRequest</a> request) |
| throws <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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preCompact-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-">RegionObserver</a></code></span></div> |
| <div class="block">Called prior to writing the <a href="../../../../../../org/apache/hadoop/hbase/regionserver/StoreFile.html" title="interface in org.apache.hadoop.hbase.regionserver"><code>StoreFile</code></a>s selected for compaction into a new |
| <code>StoreFile</code>. |
| <p> |
| To override or modify the compaction process, implementing classes can wrap the provided |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver"><code>InternalScanner</code></a> with a custom implementation that is returned from this method. The |
| custom scanner can then inspect <a href="../../../../../../org/apache/hadoop/hbase/Cell.html" title="interface in org.apache.hadoop.hbase"><code>Cell</code></a>s from the wrapped scanner, |
| applying its own policy to what gets written.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preCompact-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-">preCompact</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - the environment provided by the region server</dd> |
| <dd><code>store</code> - the store being compacted</dd> |
| <dd><code>scanner</code> - the scanner over existing data used in the store file rewriting</dd> |
| <dd><code>scanType</code> - type of Scan</dd> |
| <dd><code>tracker</code> - tracker used to track the life cycle of a compaction</dd> |
| <dd><code>request</code> - the requested compaction</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the scanner to use during compaction. Should not be <code>null</code> unless the |
| implementation is writing new store files on its own.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <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></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="preMemStoreCompactionCompactScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>preMemStoreCompactionCompactScannerOpen</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.166">preMemStoreCompactionCompactScannerOpen</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanOptions.html" title="interface in org.apache.hadoop.hbase.regionserver">ScanOptions</a> options) |
| throws <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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preMemStoreCompactionCompactScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-">RegionObserver</a></code></span></div> |
| <div class="block">Called before we open store scanner for in memory compaction. You can use the <code>options</code> |
| to change max versions and TTL for the scanner being opened. Notice that this method will only |
| be called when you use <code>eager</code> mode. For <code>basic</code> mode we will not drop any cells |
| thus we do not open a store scanner.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preMemStoreCompactionCompactScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-">preMemStoreCompactionCompactScannerOpen</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - the environment provided by the region server</dd> |
| <dd><code>store</code> - the store where in memory compaction is being requested</dd> |
| <dd><code>options</code> - used to change max versions and TTL for the scanner being opened</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <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></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="preMemStoreCompactionCompact-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>preMemStoreCompactionCompact</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.173">preMemStoreCompactionCompact</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> scanner) |
| throws <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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preMemStoreCompactionCompact-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-">RegionObserver</a></code></span></div> |
| <div class="block">Called before we do in memory compaction. Notice that this method will only be called when you |
| use <code>eager</code> mode. For <code>basic</code> mode we will not drop any cells thus there is no |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver"><code>InternalScanner</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preMemStoreCompactionCompact-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-">preMemStoreCompactionCompact</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - the environment provided by the region server</dd> |
| <dd><code>store</code> - the store where in memory compaction is being executed</dd> |
| <dd><code>scanner</code> - the scanner over existing data used in the memstore segments being compact</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the scanner to use during in memory compaction. Must be non-null.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <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></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="preGetOp-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.Get-java.util.List-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>preGetOp</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.180">preGetOp</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/Get.html" title="class in org.apache.hadoop.hbase.client">Get</a> get, |
| <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/Cell.html" title="interface in org.apache.hadoop.hbase">Cell</a>> result) |
| throws <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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preGetOp-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.Get-java.util.List-">RegionObserver</a></code></span></div> |
| <div class="block">Called before the client performs a Get |
| <p> |
| Call CoprocessorEnvironment#bypass to skip default actions. |
| If 'bypass' is set, we skip out on calling any subsequent chained coprocessors.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preGetOp-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.Get-java.util.List-">preGetOp</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - the environment provided by the region server</dd> |
| <dd><code>get</code> - the Get request</dd> |
| <dd><code>result</code> - The result to return to the client if default processing |
| is bypassed. Can be modified. Will not be used if default processing |
| is not bypassed.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <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></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getUniqueTimestamp-byte:A-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getUniqueTimestamp</h4> |
| <pre>private long <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.225">getUniqueTimestamp</a>(byte[] row)</pre> |
| </li> |
| </ul> |
| <a name="preIncrement-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.Increment-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>preIncrement</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/hbase/client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.241">preIncrement</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/Increment.html" title="class in org.apache.hadoop.hbase.client">Increment</a> increment) |
| throws <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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preIncrement-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.Increment-">RegionObserver</a></code></span></div> |
| <div class="block">Called before Increment. |
| <p> |
| Call CoprocessorEnvironment#bypass to skip default actions. |
| If 'bypass' is set, we skip out on calling any subsequent chained coprocessors. |
| <p> |
| Note: Do not retain references to any Cells in 'increment' beyond the life of this invocation. |
| If need a Cell reference for later use, copy the cell and use that.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preIncrement-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.Increment-">preIncrement</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - the environment provided by the region server</dd> |
| <dd><code>increment</code> - increment object</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>result to return to the client if bypassing default processing</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <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></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="preStoreScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>preStoreScannerOpen</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html#line.262">preStoreScannerOpen</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> ctx, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanOptions.html" title="interface in org.apache.hadoop.hbase.regionserver">ScanOptions</a> options) |
| throws <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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preStoreScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-">RegionObserver</a></code></span></div> |
| <div class="block">Called before a store opens a new scanner. |
| <p> |
| This hook is called when a "user" scanner is opened. Use <code>preFlushScannerOpen</code> and |
| <code>preCompactScannerOpen</code> to inject flush/compaction. |
| <p> |
| Notice that, this method is used to change the inherent max versions and TTL for a Store. For |
| example, you can change the max versions option for a <a href="../../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client"><code>Scan</code></a> object to 10 in |
| <code>preScannerOpen</code>, but if the max versions config on the Store is 1, then you still can |
| only read 1 version. You need also to inject here to change the max versions to 10 if you want |
| to get more versions.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preStoreScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-">preStoreScannerOpen</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>ctx</code> - the environment provided by the region server</dd> |
| <dd><code>store</code> - the store which we want to get scanner from</dd> |
| <dd><code>options</code> - used to change max versions and TTL for the scanner being opened</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <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></dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preFlushScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-"><code>RegionObserver.preFlushScannerOpen(ObserverContext, Store, ScanOptions, FlushLifeCycleTracker)</code></a>, |
| <a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preCompactScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-"><code>RegionObserver.preCompactScannerOpen(ObserverContext, Store, ScanType, ScanOptions, |
| CompactionLifeCycleTracker, CompactionRequest)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
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