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| <h2 title="Interface RegionCoprocessorEnvironment" class="title">Interface RegionCoprocessorEnvironment</h2> |
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| <dt>All Superinterfaces:</dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a><<a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessor</a>></dd> |
| </dl> |
| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.RegionEnvironment.html" title="class in org.apache.hadoop.hbase.regionserver">RegionCoprocessorHost.RegionEnvironment</a>, <a href="../../../../../org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.RegionEnvironmentForCoreCoprocessors.html" title="class in org.apache.hadoop.hbase.regionserver">RegionCoprocessorHost.RegionEnvironmentForCoreCoprocessors</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>@InterfaceAudience.LimitedPrivate(value="Coprocesssor") |
| @InterfaceStability.Evolving |
| public interface <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#line.40">RegionCoprocessorEnvironment</a> |
| extends <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a><<a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessor</a>></pre> |
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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="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client">Connection</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#createConnection-org.apache.hadoop.conf.Configuration-">createConnection</a></span>(org.apache.hadoop.conf.Configuration conf)</code> |
| <div class="block">Creates a cluster connection using the passed Configuration.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/RawCellBuilder.html" title="interface in org.apache.hadoop.hbase">RawCellBuilder</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#getCellBuilder--">getCellBuilder</a></span>()</code> |
| <div class="block">Returns a CellBuilder so that coprocessors can build cells.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client">Connection</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#getConnection--">getConnection</a></span>()</code> |
| <div class="block">Returns the hosts' Connection to the Cluster.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/metrics/MetricRegistry.html" title="interface in org.apache.hadoop.hbase.metrics">MetricRegistry</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#getMetricRegistryForRegionServer--">getMetricRegistryForRegionServer</a></span>()</code> |
| <div class="block">Returns a MetricRegistry that can be used to track metrics at the region server level.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/regionserver/OnlineRegions.html" title="interface in org.apache.hadoop.hbase.regionserver">OnlineRegions</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#getOnlineRegions--">getOnlineRegions</a></span>()</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/regionserver/Region.html" title="interface in org.apache.hadoop.hbase.regionserver">Region</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#getRegion--">getRegion</a></span>()</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#getRegionInfo--">getRegionInfo</a></span>()</code> </td> |
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| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#getServerName--">getServerName</a></span>()</code> </td> |
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| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentMap</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<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>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#getSharedData--">getSharedData</a></span>()</code> </td> |
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| </a> |
| <h3>Methods inherited from interface org.apache.hadoop.hbase.<a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a></h3> |
| <code><a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html#getClassLoader--">getClassLoader</a>, <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html#getConfiguration--">getConfiguration</a>, <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html#getHBaseVersion--">getHBaseVersion</a>, <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html#getInstance--">getInstance</a>, <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html#getLoadSequence--">getLoadSequence</a>, <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html#getPriority--">getPriority</a>, <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html#getVersion--">getVersion</a></code></li> |
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| <a name="getRegion--"> |
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| <h4>getRegion</h4> |
| <pre><a href="../../../../../org/apache/hadoop/hbase/regionserver/Region.html" title="interface in org.apache.hadoop.hbase.regionserver">Region</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#line.42">getRegion</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the region associated with this coprocessor</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRegionInfo--"> |
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| <h4>getRegionInfo</h4> |
| <pre><a href="../../../../../org/apache/hadoop/hbase/client/RegionInfo.html" title="interface in org.apache.hadoop.hbase.client">RegionInfo</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#line.45">getRegionInfo</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>region information for the region this coprocessor is running on</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getOnlineRegions--"> |
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| <h4>getOnlineRegions</h4> |
| <pre><a href="../../../../../org/apache/hadoop/hbase/regionserver/OnlineRegions.html" title="interface in org.apache.hadoop.hbase.regionserver">OnlineRegions</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#line.50">getOnlineRegions</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Interface to Map of regions online on this RegionServer <a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#getServerName--"><code>getServerName()</code></a>}.</dd> |
| </dl> |
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| <h4>getSharedData</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentMap.html?is-external=true" title="class or interface in java.util.concurrent">ConcurrentMap</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<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>> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#line.53">getSharedData</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>shared data between all instances of this coprocessor</dd> |
| </dl> |
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| <h4>getServerName</h4> |
| <pre><a href="../../../../../org/apache/hadoop/hbase/ServerName.html" title="class in org.apache.hadoop.hbase">ServerName</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#line.58">getServerName</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Hosting Server's ServerName</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getConnection--"> |
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| <h4>getConnection</h4> |
| <pre><a href="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client">Connection</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#line.86">getConnection</a>()</pre> |
| <div class="block">Returns the hosts' Connection to the Cluster. <b>Do not close! This is a shared connection |
| with the hosting server. Throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang"><code>UnsupportedOperationException</code></a> if you try to close |
| or abort it</b>. |
| |
| For light-weight usage only. Heavy-duty usage will pull down |
| the hosting RegionServer responsiveness as well as that of other Coprocessors making use of |
| this Connection. Use to create table on start or to do administrative operations. Coprocessors |
| should create their own Connections if heavy usage to avoid impinging on hosting Server |
| operation. To create a Connection or if a Coprocessor requires a region with a particular |
| Configuration, use <a href="../../../../../org/apache/hadoop/hbase/client/ConnectionFactory.html" title="class in org.apache.hadoop.hbase.client"><code>ConnectionFactory</code></a> or |
| <a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#createConnection-org.apache.hadoop.conf.Configuration-"><code>createConnection(Configuration)</code></a>}. |
| |
| <p>Be aware that operations that make use of this Connection are executed as the RegionServer |
| User, the hbase super user that started this server process. Exercise caution running |
| operations as this User (See <a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#createConnection-org.apache.hadoop.conf.Configuration-"><code>createConnection(Configuration)</code></a>} to run as other than |
| the RegionServer User). |
| |
| <p>Be careful RPC'ing from a Coprocessor context. RPC's will fail, stall, retry, and/or crawl |
| because the remote side is not online, is struggling or it is on the other side of a network |
| partition. Any use of Connection from inside a Coprocessor must be able to handle all such |
| hiccups.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The host's Connection to the Cluster.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#createConnection-org.apache.hadoop.conf.Configuration-"><code>createConnection(Configuration)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="createConnection-org.apache.hadoop.conf.Configuration-"> |
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| </a> |
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| <li class="blockList"> |
| <h4>createConnection</h4> |
| <pre><a href="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client">Connection</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#line.108">createConnection</a>(org.apache.hadoop.conf.Configuration conf) |
| 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">Creates a cluster connection using the passed Configuration. |
| |
| Creating a Connection is a heavy-weight operation. The resultant Connection's cache of |
| region locations will be empty. Therefore you should cache and reuse Connections rather than |
| create a Connection on demand. Create on start of your Coprocessor. You will have to cast |
| the CoprocessorEnvironment appropriately to get at this API at start time because |
| Coprocessor start method is passed a subclass of this CoprocessorEnvironment or fetch |
| Connection using a synchronized accessor initializing the Connection on first access. Close |
| the returned Connection when done to free resources. Using this API rather |
| than <a href="../../../../../org/apache/hadoop/hbase/client/ConnectionFactory.html#createConnection-org.apache.hadoop.conf.Configuration-"><code>ConnectionFactory.createConnection(Configuration)</code></a> |
| returns a Connection that will short-circuit RPC if the target is a local resource. Use |
| ConnectionFactory if you don't need this ability. |
| |
| <p>Be careful RPC'ing from a Coprocessor context. RPC's will fail, stall, retry, and/or crawl |
| because the remote side is not online, is struggling or it is on the other side of a network |
| partition. Any use of Connection from inside a Coprocessor must be able to handle all such |
| hiccups.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Connection created using the passed conf.</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> |
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| <h4>getMetricRegistryForRegionServer</h4> |
| <pre><a href="../../../../../org/apache/hadoop/hbase/metrics/MetricRegistry.html" title="interface in org.apache.hadoop.hbase.metrics">MetricRegistry</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#line.125">getMetricRegistryForRegionServer</a>()</pre> |
| <div class="block">Returns a MetricRegistry that can be used to track metrics at the region server level. All |
| metrics tracked at this level will be shared by all the coprocessor instances |
| of the same class in the same region server process. Note that there will be one |
| region coprocessor environment per region in the server, but all of these instances will share |
| the same MetricRegistry. The metric instances (like Counter, Timer, etc) will also be shared |
| among all of the region coprocessor instances. |
| |
| <p>See ExampleRegionObserverWithMetrics class in the hbase-examples modules to see examples of how |
| metrics can be instantiated and used.</p></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>A MetricRegistry for the coprocessor class to track and export metrics.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getCellBuilder--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getCellBuilder</h4> |
| <pre><a href="../../../../../org/apache/hadoop/hbase/RawCellBuilder.html" title="interface in org.apache.hadoop.hbase">RawCellBuilder</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html#line.132">getCellBuilder</a>()</pre> |
| <div class="block">Returns a CellBuilder so that coprocessors can build cells. These cells can also include tags. |
| Note that this builder does not support updating seqId of the cells</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the RawCellBuilder</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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