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| <div class="subTitle">org.apache.hadoop.hbase.mapreduce</div> |
| <h2 title="Class TableInputFormatBase" class="title">Class TableInputFormatBase</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.hadoop.mapreduce.InputFormat<<a href="../../../../../org/apache/hadoop/hbase/io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<a href="../../../../../org/apache/hadoop/hbase/client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.hadoop.hbase.mapreduce.TableInputFormatBase</li> |
| </ul> |
| </li> |
| </ul> |
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| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormat.html" title="class in org.apache.hadoop.hbase.mapreduce">TableInputFormat</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>@InterfaceAudience.Public |
| public abstract class <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.107">TableInputFormatBase</a> |
| extends org.apache.hadoop.mapreduce.InputFormat<<a href="../../../../../org/apache/hadoop/hbase/io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<a href="../../../../../org/apache/hadoop/hbase/client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>></pre> |
| <div class="block">A base for <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormat.html" title="class in org.apache.hadoop.hbase.mapreduce"><code>TableInputFormat</code></a>s. Receives a <a href="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client"><code>Connection</code></a>, a <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase"><code>TableName</code></a>, |
| an <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client"><code>Scan</code></a> instance that defines the input columns etc. Subclasses may use |
| other TableRecordReader implementations. |
| |
| Subclasses MUST ensure initializeTable(Connection, TableName) is called for an instance to |
| function properly. Each of the entry points to this class used by the MapReduce framework, |
| <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#createRecordReader-org.apache.hadoop.mapreduce.InputSplit-org.apache.hadoop.mapreduce.TaskAttemptContext-"><code>createRecordReader(InputSplit, TaskAttemptContext)</code></a> and <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getSplits-org.apache.hadoop.mapreduce.JobContext-"><code>getSplits(JobContext)</code></a>, |
| will call <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#initialize-org.apache.hadoop.mapreduce.JobContext-"><code>initialize(JobContext)</code></a> as a convenient centralized location to handle |
| retrieving the necessary configuration information. If your subclass overrides either of these |
| methods, either call the parent version or call initialize yourself. |
| |
| <p> |
| An example of a subclass: |
| <pre> |
| class ExampleTIF extends TableInputFormatBase { |
| |
| @Override |
| protected void initialize(JobContext context) throws IOException { |
| // We are responsible for the lifecycle of this connection until we hand it over in |
| // initializeTable. |
| Connection connection = ConnectionFactory.createConnection(HBaseConfiguration.create( |
| job.getConfiguration())); |
| TableName tableName = TableName.valueOf("exampleTable"); |
| // mandatory. once passed here, TableInputFormatBase will handle closing the connection. |
| initializeTable(connection, tableName); |
| byte[][] inputColumns = new byte [][] { Bytes.toBytes("columnA"), |
| Bytes.toBytes("columnB") }; |
| // optional, by default we'll get everything for the table. |
| Scan scan = new Scan(); |
| for (byte[] family : inputColumns) { |
| scan.addFamily(family); |
| } |
| Filter exampleFilter = new RowFilter(CompareOp.EQUAL, new RegexStringComparator("aa.*")); |
| scan.setFilter(exampleFilter); |
| setScan(scan); |
| } |
| } |
| </pre> |
| |
| |
| The number of InputSplits(mappers) match the number of regions in a table by default. |
| Set "hbase.mapreduce.tableinput.mappers.per.region" to specify how many mappers per region, set |
| this property will disable autobalance below.\ |
| Set "hbase.mapreduce.tif.input.autobalance" to enable autobalance, hbase will assign mappers |
| based on average region size; For regions, whose size larger than average region size may assigned |
| more mappers, and for smaller one, they may group together to use one mapper. If actual average |
| region size is too big, like 50G, it is not good to only assign 1 mapper for those large regions. |
| Use "hbase.mapreduce.tif.ave.regionsize" to set max average region size when enable "autobalanece", |
| default mas average region size is 8G.</div> |
| </li> |
| </ul> |
| </div> |
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| <!-- =========== FIELD SUMMARY =========== --> |
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| <h3>Field Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> |
| <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 <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client">Admin</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#admin">admin</a></span></code> |
| <div class="block">The <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client"><code>Admin</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <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/mapreduce/TableInputFormatBase.html#connection">connection</a></span></code> |
| <div class="block">The underlying <a href="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client"><code>Connection</code></a> of the table.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#INITIALIZATION_ERROR">INITIALIZATION_ERROR</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#MAPREDUCE_INPUT_AUTOBALANCE">MAPREDUCE_INPUT_AUTOBALANCE</a></span></code> |
| <div class="block">Specify if we enable auto-balance to set number of mappers in M/R jobs.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#MAX_AVERAGE_REGION_SIZE">MAX_AVERAGE_REGION_SIZE</a></span></code> |
| <div class="block">In auto-balance, we split input by ave region size, if calculated region size is too big, we can set it.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#NOT_INITIALIZED">NOT_INITIALIZED</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#NUM_MAPPERS_PER_REGION">NUM_MAPPERS_PER_REGION</a></span></code> |
| <div class="block">Set the number of Mappers for each region, all regions have same number of Mappers</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client">RegionLocator</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#regionLocator">regionLocator</a></span></code> |
| <div class="block">The <a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client"><code>RegionLocator</code></a> of the table.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/HashMap.html?is-external=true" title="class or interface in java.util">HashMap</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/net/InetAddress.html?is-external=true" title="class or interface in java.net">InetAddress</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>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#reverseDNSCacheMap">reverseDNSCacheMap</a></span></code> |
| <div class="block">The reverse DNS lookup cache mapping: IPAddress => HostName</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client">Scan</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#scan">scan</a></span></code> |
| <div class="block">Holds the details for the internal scanner.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/client/Table.html" title="interface in org.apache.hadoop.hbase.client">Table</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#table">table</a></span></code> |
| <div class="block">The <a href="../../../../../org/apache/hadoop/hbase/client/Table.html" title="interface in org.apache.hadoop.hbase.client"><code>Table</code></a> to scan.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce">TableRecordReader</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#tableRecordReader">tableRecordReader</a></span></code> |
| <div class="block">The reader scanning the table, can be a custom one.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.summary"> |
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| <h3>Constructor Summary</h3> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <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/mapreduce/TableInputFormatBase.html#TableInputFormatBase--">TableInputFormatBase</a></span>()</code> </td> |
| </tr> |
| </table> |
| </li> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
| <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><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><org.apache.hadoop.mapreduce.InputSplit></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#calculateAutoBalancedSplits-java.util.List-long-">calculateAutoBalancedSplits</a></span>(<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><org.apache.hadoop.mapreduce.InputSplit> splits, |
| long maxAverageRegionSize)</code> |
| <div class="block">Calculates the number of MapReduce input splits for the map tasks.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#close-java.io.Closeable...-">close</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>... closables)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#closeTable--">closeTable</a></span>()</code> |
| <div class="block">Close the Table and related objects that were initialized via |
| <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#initializeTable-org.apache.hadoop.hbase.client.Connection-org.apache.hadoop.hbase.TableName-"><code>initializeTable(Connection, TableName)</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>protected <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><org.apache.hadoop.mapreduce.InputSplit></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#createNInputSplitsUniform-org.apache.hadoop.mapreduce.InputSplit-int-">createNInputSplitsUniform</a></span>(org.apache.hadoop.mapreduce.InputSplit split, |
| int n)</code> |
| <div class="block">Create n splits for one InputSplit, For now only support uniform distribution</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>org.apache.hadoop.mapreduce.RecordReader<<a href="../../../../../org/apache/hadoop/hbase/io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<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/mapreduce/TableInputFormatBase.html#createRecordReader-org.apache.hadoop.mapreduce.InputSplit-org.apache.hadoop.mapreduce.TaskAttemptContext-">createRecordReader</a></span>(org.apache.hadoop.mapreduce.InputSplit split, |
| org.apache.hadoop.mapreduce.TaskAttemptContext context)</code> |
| <div class="block">Builds a <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce"><code>TableRecordReader</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../org/apache/hadoop/hbase/mapreduce/RegionSizeCalculator.html" title="class in org.apache.hadoop.hbase.mapreduce">RegionSizeCalculator</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#createRegionSizeCalculator-org.apache.hadoop.hbase.client.RegionLocator-org.apache.hadoop.hbase.client.Admin-">createRegionSizeCalculator</a></span>(<a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client">RegionLocator</a> locator, |
| <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client">Admin</a> admin)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client">Admin</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getAdmin--">getAdmin</a></span>()</code> |
| <div class="block">Allows subclasses to get the <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client"><code>Admin</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client">RegionLocator</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getRegionLocator--">getRegionLocator</a></span>()</code> |
| <div class="block">Allows subclasses to get the <a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client"><code>RegionLocator</code></a>.</div> |
| </td> |
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| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client">Scan</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getScan--">getScan</a></span>()</code> |
| <div class="block">Gets the scan defining the actual details like columns etc.</div> |
| </td> |
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| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><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><org.apache.hadoop.mapreduce.InputSplit></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getSplits-org.apache.hadoop.mapreduce.JobContext-">getSplits</a></span>(org.apache.hadoop.mapreduce.JobContext context)</code> |
| <div class="block">Calculates the splits that will serve as input for the map tasks.</div> |
| </td> |
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| <td class="colFirst"><code>protected <a href="../../../../../org/apache/hadoop/hbase/util/Pair.html" title="class in org.apache.hadoop.hbase.util">Pair</a><byte[][],byte[][]></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getStartEndKeys--">getStartEndKeys</a></span>()</code> </td> |
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| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../org/apache/hadoop/hbase/client/Table.html" title="interface in org.apache.hadoop.hbase.client">Table</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getTable--">getTable</a></span>()</code> |
| <div class="block">Allows subclasses to get the <a href="../../../../../org/apache/hadoop/hbase/client/Table.html" title="interface in org.apache.hadoop.hbase.client"><code>Table</code></a>.</div> |
| </td> |
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| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#includeRegionInSplit-byte:A-byte:A-">includeRegionInSplit</a></span>(byte[] startKey, |
| byte[] endKey)</code> |
| <div class="block">Test if the given region is to be included in the InputSplit while splitting |
| the regions of a table.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#initialize-org.apache.hadoop.mapreduce.JobContext-">initialize</a></span>(org.apache.hadoop.mapreduce.JobContext context)</code> |
| <div class="block">Handle subclass specific set up.</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#initializeTable-org.apache.hadoop.hbase.client.Connection-org.apache.hadoop.hbase.TableName-">initializeTable</a></span>(<a href="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client">Connection</a> connection, |
| <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName)</code> |
| <div class="block">Allows subclasses to initialize the table information.</div> |
| </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code>private <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><org.apache.hadoop.mapreduce.InputSplit></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#oneInputSplitPerRegion--">oneInputSplitPerRegion</a></span>()</code> |
| <div class="block">Create one InputSplit per region</div> |
| </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code>(package private) <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#reverseDNS-java.net.InetAddress-">reverseDNS</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/net/InetAddress.html?is-external=true" title="class or interface in java.net">InetAddress</a> ipAddress)</code> </td> |
| </tr> |
| <tr id="i17" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#setScan-org.apache.hadoop.hbase.client.Scan-">setScan</a></span>(<a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client">Scan</a> scan)</code> |
| <div class="block">Sets the scan defining the actual details like columns etc.</div> |
| </td> |
| </tr> |
| <tr id="i18" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#setTableRecordReader-org.apache.hadoop.hbase.mapreduce.TableRecordReader-">setTableRecordReader</a></span>(<a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce">TableRecordReader</a> tableRecordReader)</code> |
| <div class="block">Allows subclasses to set the <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce"><code>TableRecordReader</code></a>.</div> |
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| <div class="block">Specify if we enable auto-balance to set number of mappers in M/R jobs.</div> |
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| <div class="block">In auto-balance, we split input by ave region size, if calculated region size is too big, we can set it.</div> |
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| <div class="block">Set the number of Mappers for each region, all regions have same number of Mappers</div> |
| <dl> |
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| <dd><a href="../../../../../constant-values.html#org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.NUM_MAPPERS_PER_REGION">Constant Field Values</a></dd> |
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| <h4>scan</h4> |
| <pre>private <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client">Scan</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.131">scan</a></pre> |
| <div class="block">Holds the details for the internal scanner.</div> |
| <dl> |
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| <dd><a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client"><code>Scan</code></a></dd> |
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| <div class="block">The <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client"><code>Admin</code></a>.</div> |
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| <pre>private <a href="../../../../../org/apache/hadoop/hbase/client/Table.html" title="interface in org.apache.hadoop.hbase.client">Table</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.135">table</a></pre> |
| <div class="block">The <a href="../../../../../org/apache/hadoop/hbase/client/Table.html" title="interface in org.apache.hadoop.hbase.client"><code>Table</code></a> to scan.</div> |
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| <pre>private <a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client">RegionLocator</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.137">regionLocator</a></pre> |
| <div class="block">The <a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client"><code>RegionLocator</code></a> of the table.</div> |
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| <div class="block">The underlying <a href="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client"><code>Connection</code></a> of the table.</div> |
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| <div class="block">The reverse DNS lookup cache mapping: IPAddress => HostName</div> |
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| <pre>public org.apache.hadoop.mapreduce.RecordReader<<a href="../../../../../org/apache/hadoop/hbase/io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<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/mapreduce/TableInputFormatBase.html#line.161">createRecordReader</a>(org.apache.hadoop.mapreduce.InputSplit split, |
| org.apache.hadoop.mapreduce.TaskAttemptContext context) |
| 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">Builds a <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce"><code>TableRecordReader</code></a>. If no <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce"><code>TableRecordReader</code></a> was provided, uses |
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| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code>createRecordReader</code> in class <code>org.apache.hadoop.mapreduce.InputFormat<<a href="../../../../../org/apache/hadoop/hbase/io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<a href="../../../../../org/apache/hadoop/hbase/client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>split</code> - The split to work with.</dd> |
| <dd><code>context</code> - The current context.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The newly created record reader.</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> - When creating the reader fails.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><code>InputFormat.createRecordReader( |
| org.apache.hadoop.mapreduce.InputSplit, |
| org.apache.hadoop.mapreduce.TaskAttemptContext)</code></dd> |
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| 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> |
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| 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">Calculates the splits that will serve as input for the map tasks.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code>getSplits</code> in class <code>org.apache.hadoop.mapreduce.InputFormat<<a href="../../../../../org/apache/hadoop/hbase/io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<a href="../../../../../org/apache/hadoop/hbase/client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - The current job context.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The list of input splits.</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> - When creating the list of splits fails.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><code>InputFormat.getSplits( |
| org.apache.hadoop.mapreduce.JobContext)</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="oneInputSplitPerRegion--"> |
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| <pre>private <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><org.apache.hadoop.mapreduce.InputSplit> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.290">oneInputSplitPerRegion</a>() |
| 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">Create one InputSplit per region</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The list of InputSplit for all the regions</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> - throws IOException</dd> |
| </dl> |
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| <pre>protected <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><org.apache.hadoop.mapreduce.InputSplit> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.371">createNInputSplitsUniform</a>(org.apache.hadoop.mapreduce.InputSplit split, |
| int n) |
| throws <a href="../../../../../org/apache/hadoop/hbase/exceptions/IllegalArgumentIOException.html" title="class in org.apache.hadoop.hbase.exceptions">IllegalArgumentIOException</a></pre> |
| <div class="block">Create n splits for one InputSplit, For now only support uniform distribution</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>split</code> - A TableSplit corresponding to a range of rowkeys</dd> |
| <dd><code>n</code> - Number of ranges after splitting. Pass 1 means no split for the range |
| Pass 2 if you want to split the range in two;</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>A list of TableSplit, the size of the list is n</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/exceptions/IllegalArgumentIOException.html" title="class in org.apache.hadoop.hbase.exceptions">IllegalArgumentIOException</a></code> - throws IllegalArgumentIOException</dd> |
| </dl> |
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| <a name="calculateAutoBalancedSplits-java.util.List-long-"> |
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| <ul class="blockList"> |
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| <h4>calculateAutoBalancedSplits</h4> |
| <pre>public <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><org.apache.hadoop.mapreduce.InputSplit> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.439">calculateAutoBalancedSplits</a>(<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><org.apache.hadoop.mapreduce.InputSplit> splits, |
| long maxAverageRegionSize) |
| 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">Calculates the number of MapReduce input splits for the map tasks. The number of |
| MapReduce input splits depends on the average region size. |
| Make it 'public' for testing</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>splits</code> - The list of input splits before balance.</dd> |
| <dd><code>maxAverageRegionSize</code> - max Average region size for one mapper</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The list of input splits.</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> - When creating the list of splits fails.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><code>InputFormat.getSplits( |
| org.apache.hadoop.mapreduce.JobContext)</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="reverseDNS-java.net.InetAddress-"> |
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| <h4>reverseDNS</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.509">reverseDNS</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/net/InetAddress.html?is-external=true" title="class or interface in java.net">InetAddress</a> ipAddress) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/net/UnknownHostException.html?is-external=true" title="class or interface in java.net">UnknownHostException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/net/UnknownHostException.html?is-external=true" title="class or interface in java.net">UnknownHostException</a></code></dd> |
| </dl> |
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| <h4>includeRegionInSplit</h4> |
| <pre>protected boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.550">includeRegionInSplit</a>(byte[] startKey, |
| byte[] endKey)</pre> |
| <div class="block">Test if the given region is to be included in the InputSplit while splitting |
| the regions of a table. |
| <p> |
| This optimization is effective when there is a specific reasoning to exclude an entire region from the M-R job, |
| (and hence, not contributing to the InputSplit), given the start and end keys of the same. <br> |
| Useful when we need to remember the last-processed top record and revisit the [last, current) interval for M-R processing, |
| continuously. In addition to reducing InputSplits, reduces the load on the region server as well, due to the ordering of the keys. |
| <br> |
| <br> |
| Note: It is possible that <code>endKey.length() == 0 </code> , for the last (recent) region. |
| <br> |
| Override this method, if you want to bulk exclude regions altogether from M-R. By default, no region is excluded( i.e. all regions are included).</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>startKey</code> - Start key of the region</dd> |
| <dd><code>endKey</code> - End key of the region</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true, if this region needs to be included as part of the input (default).</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRegionLocator--"> |
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| <ul class="blockList"> |
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| <h4>getRegionLocator</h4> |
| <pre>protected <a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client">RegionLocator</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.557">getRegionLocator</a>()</pre> |
| <div class="block">Allows subclasses to get the <a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client"><code>RegionLocator</code></a>.</div> |
| </li> |
| </ul> |
| <a name="getTable--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getTable</h4> |
| <pre>protected <a href="../../../../../org/apache/hadoop/hbase/client/Table.html" title="interface in org.apache.hadoop.hbase.client">Table</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.567">getTable</a>()</pre> |
| <div class="block">Allows subclasses to get the <a href="../../../../../org/apache/hadoop/hbase/client/Table.html" title="interface in org.apache.hadoop.hbase.client"><code>Table</code></a>.</div> |
| </li> |
| </ul> |
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| <h4>getAdmin</h4> |
| <pre>protected <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client">Admin</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.577">getAdmin</a>()</pre> |
| <div class="block">Allows subclasses to get the <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client"><code>Admin</code></a>.</div> |
| </li> |
| </ul> |
| <a name="initializeTable-org.apache.hadoop.hbase.client.Connection-org.apache.hadoop.hbase.TableName-"> |
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| <h4>initializeTable</h4> |
| <pre>protected void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.591">initializeTable</a>(<a href="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client">Connection</a> connection, |
| <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">Allows subclasses to initialize the table information.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>connection</code> - The Connection to the HBase cluster. MUST be unmanaged. We will close.</dd> |
| <dd><code>tableName</code> - The <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase"><code>TableName</code></a> of the table to process.</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="createRegionSizeCalculator-org.apache.hadoop.hbase.client.RegionLocator-org.apache.hadoop.hbase.client.Admin-"> |
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| <h4>createRegionSizeCalculator</h4> |
| <pre>@InterfaceAudience.Private |
| protected <a href="../../../../../org/apache/hadoop/hbase/mapreduce/RegionSizeCalculator.html" title="class in org.apache.hadoop.hbase.mapreduce">RegionSizeCalculator</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.603">createRegionSizeCalculator</a>(<a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client">RegionLocator</a> locator, |
| <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client">Admin</a> admin) |
| 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> |
| <dl> |
| <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="getScan--"> |
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| <ul class="blockList"> |
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| <h4>getScan</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client">Scan</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.613">getScan</a>()</pre> |
| <div class="block">Gets the scan defining the actual details like columns etc.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The internal scan instance.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setScan-org.apache.hadoop.hbase.client.Scan-"> |
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| <h4>setScan</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.623">setScan</a>(<a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client">Scan</a> scan)</pre> |
| <div class="block">Sets the scan defining the actual details like columns etc.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>scan</code> - The scan to set.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setTableRecordReader-org.apache.hadoop.hbase.mapreduce.TableRecordReader-"> |
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| <h4>setTableRecordReader</h4> |
| <pre>protected void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.633">setTableRecordReader</a>(<a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce">TableRecordReader</a> tableRecordReader)</pre> |
| <div class="block">Allows subclasses to set the <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce"><code>TableRecordReader</code></a>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>tableRecordReader</code> - A different <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce"><code>TableRecordReader</code></a> |
| implementation.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="initialize-org.apache.hadoop.mapreduce.JobContext-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>initialize</h4> |
| <pre>protected void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.652">initialize</a>(org.apache.hadoop.mapreduce.JobContext context) |
| 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">Handle subclass specific set up. |
| Each of the entry points used by the MapReduce framework, |
| <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#createRecordReader-org.apache.hadoop.mapreduce.InputSplit-org.apache.hadoop.mapreduce.TaskAttemptContext-"><code>createRecordReader(InputSplit, TaskAttemptContext)</code></a> and <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getSplits-org.apache.hadoop.mapreduce.JobContext-"><code>getSplits(JobContext)</code></a>, |
| will call <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#initialize-org.apache.hadoop.mapreduce.JobContext-"><code>initialize(JobContext)</code></a> as a convenient centralized location to handle |
| retrieving the necessary configuration information and calling |
| <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#initializeTable-org.apache.hadoop.hbase.client.Connection-org.apache.hadoop.hbase.TableName-"><code>initializeTable(Connection, TableName)</code></a>. |
| |
| Subclasses should implement their initialize call such that it is safe to call multiple times. |
| The current TableInputFormatBase implementation relies on a non-null table reference to decide |
| if an initialize call is needed, but this behavior may change in the future. In particular, |
| it is critical that initializeTable not be called multiple times since this will leak |
| Connection instances.</div> |
| <dl> |
| <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> |
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| <a name="closeTable--"> |
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| <h4>closeTable</h4> |
| <pre>protected void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.661">closeTable</a>() |
| 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">Close the Table and related objects that were initialized via |
| <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#initializeTable-org.apache.hadoop.hbase.client.Connection-org.apache.hadoop.hbase.TableName-"><code>initializeTable(Connection, TableName)</code></a>.</div> |
| <dl> |
| <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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| <h4>close</h4> |
| <pre>private void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.669">close</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>... closables) |
| 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> |
| <dl> |
| <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> |
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| </li> |
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