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| <h2 title="Class WriteSinkCoprocessor" class="title">Class WriteSinkCoprocessor</h2> |
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| <li>org.apache.hadoop.hbase.tool.WriteSinkCoprocessor</li> |
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| <dl> |
| <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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| <br> |
| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/tool/WriteSinkCoprocessor.html#line.65">WriteSinkCoprocessor</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"><p> |
| This coprocessor 'shallows' all the writes. It allows to test a pure |
| write workload, going through all the communication layers. |
| The reads will work as well, but they as we never write, they will always always |
| return an empty structure. The WAL is also skipped. |
| Obviously, the region will never be split automatically. It's up to the user |
| to split and move it. |
| </p> |
| <p> |
| For a table created like this: |
| create 'usertable', {NAME => 'f1', VERSIONS => 1} |
| </p> |
| <p> |
| You can then add the coprocessor with this command: |
| alter 'usertable', 'coprocessor' => '|org.apache.hadoop.hbase.tool.WriteSinkCoprocessor|' |
| </p> |
| <p> |
| And then |
| put 'usertable', 'f1', 'f1', 'f1' |
| </p> |
| <p> |
| scan 'usertable' |
| Will return: |
| 0 row(s) in 0.0050 seconds |
| </p> |
| TODO: It needs tests</div> |
| </li> |
| </ul> |
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| <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> |
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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 static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/tool/WriteSinkCoprocessor.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLong.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicLong</a></code></td> |
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| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/tool/WriteSinkCoprocessor.html#regionName">regionName</a></span></code> </td> |
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| <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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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/tool/WriteSinkCoprocessor.html#WriteSinkCoprocessor--">WriteSinkCoprocessor</a></span>()</code> </td> |
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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><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/tool/WriteSinkCoprocessor.html#getRegionObserver--">getRegionObserver</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/tool/WriteSinkCoprocessor.html#preBatchMutate-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.MiniBatchOperationInProgress-">preBatchMutate</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/MiniBatchOperationInProgress.html" title="class in org.apache.hadoop.hbase.regionserver">MiniBatchOperationInProgress</a><<a href="../../../../../org/apache/hadoop/hbase/client/Mutation.html" title="class in org.apache.hadoop.hbase.client">Mutation</a>> miniBatchOp)</code> |
| <div class="block">This will be called for every batch mutation operation happening at the server.</div> |
| </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/tool/WriteSinkCoprocessor.html#preOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-">preOpen</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>> e)</code> |
| <div class="block">Called before the region is reported as open to the master.</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> |
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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> |
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| <h4>preOpen</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/tool/WriteSinkCoprocessor.html#line.77">preOpen</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>> e) |
| 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#preOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-">RegionObserver</a></code></span></div> |
| <div class="block">Called before the region is reported as open to the master.</div> |
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| <dd><code><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-">preOpen</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>e</code> - the environment provided by the region server</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> |
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| <a name="preBatchMutate-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.MiniBatchOperationInProgress-"> |
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| <h4>preBatchMutate</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/tool/WriteSinkCoprocessor.html#line.82">preBatchMutate</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/MiniBatchOperationInProgress.html" title="class in org.apache.hadoop.hbase.regionserver">MiniBatchOperationInProgress</a><<a href="../../../../../org/apache/hadoop/hbase/client/Mutation.html" title="class in org.apache.hadoop.hbase.client">Mutation</a>> miniBatchOp) |
| 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#preBatchMutate-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.MiniBatchOperationInProgress-">RegionObserver</a></code></span></div> |
| <div class="block">This will be called for every batch mutation operation happening at the server. This will be |
| called after acquiring the locks on the mutating rows and after applying the proper timestamp |
| for each Mutation at the server. The batch may contain Put/Delete. By setting OperationStatus |
| of Mutations (<a href="../../../../../org/apache/hadoop/hbase/regionserver/MiniBatchOperationInProgress.html#setOperationStatus-int-org.apache.hadoop.hbase.regionserver.OperationStatus-"><code>MiniBatchOperationInProgress.setOperationStatus(int, OperationStatus)</code></a>), |
| <a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor"><code>RegionObserver</code></a> can make Region to skip these Mutations. |
| <p> |
| Note: Do not retain references to any Cells in Mutations 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#preBatchMutate-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.MiniBatchOperationInProgress-">preBatchMutate</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>miniBatchOp</code> - batch of Mutations getting applied to region.</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> |
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