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| <div class="subTitle">org.apache.hadoop.hbase.coprocessor.example</div> |
| <h2 title="Class ExampleMasterObserverWithMetrics" class="title">Class ExampleMasterObserverWithMetrics</h2> |
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| <li>org.apache.hadoop.hbase.coprocessor.example.ExampleMasterObserverWithMetrics</li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <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/MasterCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessor</a>, <a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterObserver</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#line.51">ExampleMasterObserverWithMetrics</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/MasterCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessor</a>, <a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterObserver</a></pre> |
| <div class="block">An example coprocessor that collects some metrics to demonstrate the usage of exporting custom |
| metrics from the coprocessor. |
| |
| <p> |
| These metrics will be available through the regular Hadoop metrics2 sinks (ganglia, opentsdb, |
| etc) as well as JMX output. You can view a snapshot of the metrics by going to the http web UI |
| of the master page, something like http://mymasterhost:16010/jmx |
| </p></div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.html" title="class in org.apache.hadoop.hbase.coprocessor.example"><code>ExampleRegionObserverWithMetrics</code></a></dd> |
| </dl> |
| </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> |
| </li> |
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| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <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 long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#createTableStartTime">createTableStartTime</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/metrics/Timer.html" title="interface in org.apache.hadoop.hbase.metrics">Timer</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#createTableTimer">createTableTimer</a></span></code> |
| <div class="block">This is the Timer metric object to keep track of the current count across invocations</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/metrics/Counter.html" title="interface in org.apache.hadoop.hbase.metrics">Counter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#disableTableCounter">disableTableCounter</a></span></code> |
| <div class="block">This is a Counter object to keep track of disableTable operations</div> |
| </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/coprocessor/example/ExampleMasterObserverWithMetrics.html#LOG">LOG</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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| <tr> |
| <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/coprocessor/example/ExampleMasterObserverWithMetrics.html#ExampleMasterObserverWithMetrics--">ExampleMasterObserverWithMetrics</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/MasterObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterObserver</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#getMasterObserver--">getMasterObserver</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#getMaxMemory--">getMaxMemory</a></span>()</code> |
| <div class="block">Returns the max memory of the process.</div> |
| </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/ExampleMasterObserverWithMetrics.html#getTotalMemory--">getTotalMemory</a></span>()</code> |
| <div class="block">Returns the total memory of the process.</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/coprocessor/example/ExampleMasterObserverWithMetrics.html#postCreateTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.RegionInfo:A-">postCreateTable</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/MasterCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessorEnvironment</a>> ctx, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/TableDescriptor.html" title="interface in org.apache.hadoop.hbase.client">TableDescriptor</a> desc, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>[] regions)</code> |
| <div class="block">Called after the createTable operation has been requested.</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/ExampleMasterObserverWithMetrics.html#preCreateTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.RegionInfo:A-">preCreateTable</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/MasterCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessorEnvironment</a>> ctx, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/TableDescriptor.html" title="interface in org.apache.hadoop.hbase.client">TableDescriptor</a> desc, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>[] regions)</code> |
| <div class="block">Called before a new table is created by |
| <a href="../../../../../../org/apache/hadoop/hbase/master/HMaster.html" title="class in org.apache.hadoop.hbase.master"><code>HMaster</code></a>.</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/coprocessor/example/ExampleMasterObserverWithMetrics.html#preDisableTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.TableName-">preDisableTable</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/MasterCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessorEnvironment</a>> ctx, |
| <a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName)</code> |
| <div class="block">Called prior to disabling a table.</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/ExampleMasterObserverWithMetrics.html#start-org.apache.hadoop.hbase.CoprocessorEnvironment-">start</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> env)</code> |
| <div class="block">Called by the <a href="../../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase"><code>CoprocessorEnvironment</code></a> during it's own startup to initialize the |
| coprocessor.</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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| <h3>Methods 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#getServices--">getServices</a>, <a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html#stop-org.apache.hadoop.hbase.CoprocessorEnvironment-">stop</a></code></li> |
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| <h3>Methods inherited from interface org.apache.hadoop.hbase.coprocessor.<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterObserver</a></h3> |
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| <pre>private static final org.slf4j.Logger <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#line.57">LOG</a></pre> |
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| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#line.51">ExampleMasterObserverWithMetrics</a>()</pre> |
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| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterCoprocessor.html#getMasterObserver--">getMasterObserver</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessor</a></code></dd> |
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| <div class="block">Returns the total memory of the process. We will use this to define a gauge metric</div> |
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| <h4>getMaxMemory</h4> |
| <pre>private long <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#line.72">getMaxMemory</a>()</pre> |
| <div class="block">Returns the max memory of the process. We will use this to define a gauge metric</div> |
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| <h4>preCreateTable</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#line.77">preCreateTable</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/MasterCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessorEnvironment</a>> ctx, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/TableDescriptor.html" title="interface in org.apache.hadoop.hbase.client">TableDescriptor</a> desc, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>[] regions) |
| 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/MasterObserver.html#preCreateTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.RegionInfo:A-">MasterObserver</a></code></span></div> |
| <div class="block">Called before a new table is created by |
| <a href="../../../../../../org/apache/hadoop/hbase/master/HMaster.html" title="class in org.apache.hadoop.hbase.master"><code>HMaster</code></a>. Called as part of create |
| table RPC call.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterObserver.html#preCreateTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.RegionInfo:A-">preCreateTable</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>ctx</code> - the environment to interact with the framework and master</dd> |
| <dd><code>desc</code> - the TableDescriptor for the table</dd> |
| <dd><code>regions</code> - the initial regions created for the table</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="postCreateTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.RegionInfo:A-"> |
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| <h4>postCreateTable</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#line.85">postCreateTable</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/MasterCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessorEnvironment</a>> ctx, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/TableDescriptor.html" title="interface in org.apache.hadoop.hbase.client">TableDescriptor</a> desc, |
| <a href="../../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a>[] regions) |
| 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/MasterObserver.html#postCreateTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.RegionInfo:A-">MasterObserver</a></code></span></div> |
| <div class="block">Called after the createTable operation has been requested. Called as part |
| of create table RPC call.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterObserver.html#postCreateTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.client.TableDescriptor-org.apache.hadoop.hbase.client.RegionInfo:A-">postCreateTable</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>ctx</code> - the environment to interact with the framework and master</dd> |
| <dd><code>desc</code> - the TableDescriptor for the table</dd> |
| <dd><code>regions</code> - the initial regions created for the table</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="preDisableTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.TableName-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>preDisableTable</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#line.97">preDisableTable</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/MasterCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessorEnvironment</a>> ctx, |
| <a href="../../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName) |
| 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/MasterObserver.html#preDisableTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.TableName-">MasterObserver</a></code></span></div> |
| <div class="block">Called prior to disabling a table. Called as part of disable table RPC |
| call.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterObserver.html#preDisableTable-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.TableName-">preDisableTable</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/MasterObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterObserver</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>ctx</code> - the environment to interact with the framework and master</dd> |
| <dd><code>tableName</code> - the name of the table</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="start-org.apache.hadoop.hbase.CoprocessorEnvironment-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>start</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleMasterObserverWithMetrics.html#line.104">start</a>(<a href="../../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> env) |
| 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.html#start-org.apache.hadoop.hbase.CoprocessorEnvironment-">Coprocessor</a></code></span></div> |
| <div class="block">Called by the <a href="../../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase"><code>CoprocessorEnvironment</code></a> during it's own startup to initialize the |
| coprocessor.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html#start-org.apache.hadoop.hbase.CoprocessorEnvironment-">start</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/Coprocessor.html" title="interface in org.apache.hadoop.hbase">Coprocessor</a></code></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> |
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