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| <div class="subTitle">org.apache.hadoop.mapred</div> |
| <h2 title="Class FileInputFormat" class="title">Class FileInputFormat<K,V></h2> |
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| <li>org.apache.hadoop.mapred.FileInputFormat<K,V></li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../org/apache/hadoop/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a><K,V></dd> |
| </dl> |
| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><a href="../../../../org/apache/hadoop/mapred/FixedLengthInputFormat.html" title="class in org.apache.hadoop.mapred">FixedLengthInputFormat</a>, <a href="../../../../org/apache/hadoop/mapred/KeyValueTextInputFormat.html" title="class in org.apache.hadoop.mapred">KeyValueTextInputFormat</a>, <a href="../../../../org/apache/hadoop/mapred/MultiFileInputFormat.html" title="class in org.apache.hadoop.mapred">MultiFileInputFormat</a>, <a href="../../../../org/apache/hadoop/mapred/lib/NLineInputFormat.html" title="class in org.apache.hadoop.mapred.lib">NLineInputFormat</a>, <a href="../../../../org/apache/hadoop/mapred/SequenceFileInputFormat.html" title="class in org.apache.hadoop.mapred">SequenceFileInputFormat</a>, <a href="../../../../org/apache/hadoop/mapred/TextInputFormat.html" title="class in org.apache.hadoop.mapred">TextInputFormat</a></dd> |
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| <br> |
| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public abstract class <span class="typeNameLabel">FileInputFormat<K,V></span> |
| 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/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a><K,V></pre> |
| <div class="block">A base class for file-based <a href="../../../../org/apache/hadoop/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred"><code>InputFormat</code></a>. |
| |
| <p><code>FileInputFormat</code> is the base class for all file-based |
| <code>InputFormat</code>s. This provides a generic implementation of |
| <a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getSplits-org.apache.hadoop.mapred.JobConf-int-"><code>getSplits(JobConf, int)</code></a>. |
| |
| Implementations of <code>FileInputFormat</code> can also override the |
| <a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#isSplitable-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-"><code>isSplitable(FileSystem, Path)</code></a> method to prevent input files |
| from being split-up in certain situations. Implementations that may |
| deal with non-splittable files <i>must</i> override this method, since |
| the default implementation assumes splitting is always possible.</div> |
| </li> |
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| <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/mapred/FileInputFormat.html#INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS">INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS</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/mapred/FileInputFormat.html#INPUT_DIR_RECURSIVE">INPUT_DIR_RECURSIVE</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#LOG">LOG</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/mapred/FileInputFormat.html#NUM_INPUT_FILES">NUM_INPUT_FILES</a></span></code> </td> |
| </tr> |
| </table> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#FileInputFormat--">FileInputFormat</a></span>()</code> </td> |
| </tr> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract 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> |
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| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#addInputPath-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.fs.Path-">addInputPath</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf, |
| <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> path)</code> |
| <div class="block">Add a <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs"><code>Path</code></a> to the list of inputs for the map-reduce job.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#addInputPathRecursively-java.util.List-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.PathFilter-">addInputPathRecursively</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><<a href="../../../../org/apache/hadoop/fs/FileStatus.html" title="class in org.apache.hadoop.fs">FileStatus</a>> result, |
| <a href="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</a> fs, |
| <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> path, |
| <a href="../../../../org/apache/hadoop/fs/PathFilter.html" title="interface in org.apache.hadoop.fs">PathFilter</a> inputFilter)</code> |
| <div class="block">Add files in the input path recursively into the results.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#addInputPaths-org.apache.hadoop.mapred.JobConf-java.lang.String-">addInputPaths</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf, |
| <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> commaSeparatedPaths)</code> |
| <div class="block">Add the given comma separated paths to the list of inputs for |
| the map-reduce job.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>protected long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#computeSplitSize-long-long-long-">computeSplitSize</a></span>(long goalSize, |
| long minSize, |
| long blockSize)</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getBlockIndex-org.apache.hadoop.fs.BlockLocation:A-long-">getBlockIndex</a></span>(<a href="../../../../org/apache/hadoop/fs/BlockLocation.html" title="class in org.apache.hadoop.fs">BlockLocation</a>[] blkLocations, |
| long offset)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/hadoop/fs/PathFilter.html" title="interface in org.apache.hadoop.fs">PathFilter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getInputPathFilter-org.apache.hadoop.mapred.JobConf-">getInputPathFilter</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf)</code> |
| <div class="block">Get a PathFilter instance of the filter set for the input paths.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getInputPaths-org.apache.hadoop.mapred.JobConf-">getInputPaths</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf)</code> |
| <div class="block">Get the list of input <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs"><code>Path</code></a>s for the map-reduce job.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>abstract <a href="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</a><<a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html" title="type parameter in FileInputFormat">K</a>,<a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html" title="type parameter in FileInputFormat">V</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getRecordReader-org.apache.hadoop.mapred.InputSplit-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.Reporter-">getRecordReader</a></span>(<a href="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</a> split, |
| <a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job, |
| <a href="../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</a> reporter)</code> |
| <div class="block">Get the <a href="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred"><code>RecordReader</code></a> for the given <a href="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred"><code>InputSplit</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>protected <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/mapred/FileInputFormat.html#getSplitHosts-org.apache.hadoop.fs.BlockLocation:A-long-long-org.apache.hadoop.net.NetworkTopology-">getSplitHosts</a></span>(<a href="../../../../org/apache/hadoop/fs/BlockLocation.html" title="class in org.apache.hadoop.fs">BlockLocation</a>[] blkLocations, |
| long offset, |
| long splitSize, |
| org.apache.hadoop.net.NetworkTopology clusterMap)</code> |
| <div class="block">This function identifies and returns the hosts that contribute |
| most for a given split.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#getSplits-org.apache.hadoop.mapred.JobConf-int-">getSplits</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job, |
| int numSplits)</code> |
| <div class="block">Splits files returned by <a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#listStatus-org.apache.hadoop.mapred.JobConf-"><code>listStatus(JobConf)</code></a> when |
| they're too big.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#isSplitable-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-">isSplitable</a></span>(<a href="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</a> fs, |
| <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> filename)</code> |
| <div class="block">Is the given filename splittable? Usually, true, but if the file is |
| stream compressed, it will not be.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../org/apache/hadoop/fs/FileStatus.html" title="class in org.apache.hadoop.fs">FileStatus</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#listStatus-org.apache.hadoop.mapred.JobConf-">listStatus</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job)</code> |
| <div class="block">List input directories.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../org/apache/hadoop/mapred/FileSplit.html" title="class in org.apache.hadoop.mapred">FileSplit</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#makeSplit-org.apache.hadoop.fs.Path-long-long-java.lang.String:A-">makeSplit</a></span>(<a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> file, |
| long start, |
| long length, |
| <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>[] hosts)</code> |
| <div class="block">A factory that makes the split for this class.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../org/apache/hadoop/mapred/FileSplit.html" title="class in org.apache.hadoop.mapred">FileSplit</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#makeSplit-org.apache.hadoop.fs.Path-long-long-java.lang.String:A-java.lang.String:A-">makeSplit</a></span>(<a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> file, |
| long start, |
| long length, |
| <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>[] hosts, |
| <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>[] inMemoryHosts)</code> |
| <div class="block">A factory that makes the split for this class.</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#setInputPathFilter-org.apache.hadoop.mapred.JobConf-java.lang.Class-">setInputPathFilter</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../org/apache/hadoop/fs/PathFilter.html" title="interface in org.apache.hadoop.fs">PathFilter</a>> filter)</code> |
| <div class="block">Set a PathFilter to be applied to the input paths for the map-reduce job.</div> |
| </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#setInputPaths-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.fs.Path...-">setInputPaths</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf, |
| <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>... inputPaths)</code> |
| <div class="block">Set the array of <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs"><code>Path</code></a>s as the list of inputs |
| for the map-reduce job.</div> |
| </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#setInputPaths-org.apache.hadoop.mapred.JobConf-java.lang.String-">setInputPaths</a></span>(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf, |
| <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> commaSeparatedPaths)</code> |
| <div class="block">Sets the given comma separated paths as the list of inputs |
| for the map-reduce job.</div> |
| </td> |
| </tr> |
| <tr id="i17" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#setMinSplitSize-long-">setMinSplitSize</a></span>(long minSplitSize)</code> </td> |
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| <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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| </div> |
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| <h4>LOG</h4> |
| <pre>public static final org.slf4j.Logger LOG</pre> |
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| <h4>NUM_INPUT_FILES</h4> |
| <pre>public static final <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> NUM_INPUT_FILES</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.mapred.FileInputFormat.NUM_INPUT_FILES">Constant Field Values</a></dd> |
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| <pre>public static final <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> INPUT_DIR_RECURSIVE</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.mapred.FileInputFormat.INPUT_DIR_RECURSIVE">Constant Field Values</a></dd> |
| </dl> |
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| <h4>INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS</h4> |
| <pre>public static final <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> INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.mapred.FileInputFormat.INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS">Constant Field Values</a></dd> |
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| <h3>Constructor Detail</h3> |
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| <h4>FileInputFormat</h4> |
| <pre>public FileInputFormat()</pre> |
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| <h4>setMinSplitSize</h4> |
| <pre>protected void setMinSplitSize(long minSplitSize)</pre> |
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| <a name="isSplitable-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-"> |
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| <h4>isSplitable</h4> |
| <pre>protected boolean isSplitable(<a href="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</a> fs, |
| <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> filename)</pre> |
| <div class="block">Is the given filename splittable? Usually, true, but if the file is |
| stream compressed, it will not be. |
| |
| The default implementation in <code>FileInputFormat</code> always returns |
| true. Implementations that may deal with non-splittable files <i>must</i> |
| override this method. |
| |
| <code>FileInputFormat</code> implementations can override this and return |
| <code>false</code> to ensure that individual input files are never split-up |
| so that <a href="../../../../org/apache/hadoop/mapred/Mapper.html" title="interface in org.apache.hadoop.mapred"><code>Mapper</code></a>s process entire files.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>fs</code> - the file system that the file is on</dd> |
| <dd><code>filename</code> - the file name to check</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>is this file splitable?</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRecordReader-org.apache.hadoop.mapred.InputSplit-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.Reporter-"> |
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| <h4>getRecordReader</h4> |
| <pre>public abstract <a href="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred">RecordReader</a><<a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html" title="type parameter in FileInputFormat">K</a>,<a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html" title="type parameter in FileInputFormat">V</a>> getRecordReader(<a href="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</a> split, |
| <a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job, |
| <a href="../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</a> reporter) |
| 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/mapred/InputFormat.html#getRecordReader-org.apache.hadoop.mapred.InputSplit-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.Reporter-">InputFormat</a></code></span></div> |
| <div class="block">Get the <a href="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred"><code>RecordReader</code></a> for the given <a href="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred"><code>InputSplit</code></a>. |
| |
| <p>It is the responsibility of the <code>RecordReader</code> to respect |
| record boundaries while processing the logical split to present a |
| record-oriented view to the individual task.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/InputFormat.html#getRecordReader-org.apache.hadoop.mapred.InputSplit-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.mapred.Reporter-">getRecordReader</a></code> in interface <code><a href="../../../../org/apache/hadoop/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a><<a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html" title="type parameter in FileInputFormat">K</a>,<a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html" title="type parameter in FileInputFormat">V</a>></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>split</code> - the <a href="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred"><code>InputSplit</code></a></dd> |
| <dd><code>job</code> - the job that this split belongs to</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a <a href="../../../../org/apache/hadoop/mapred/RecordReader.html" title="interface in org.apache.hadoop.mapred"><code>RecordReader</code></a></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="setInputPathFilter-org.apache.hadoop.mapred.JobConf-java.lang.Class-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setInputPathFilter</h4> |
| <pre>public static void setInputPathFilter(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../org/apache/hadoop/fs/PathFilter.html" title="interface in org.apache.hadoop.fs">PathFilter</a>> filter)</pre> |
| <div class="block">Set a PathFilter to be applied to the input paths for the map-reduce job.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>filter</code> - the PathFilter class use for filtering the input paths.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getInputPathFilter-org.apache.hadoop.mapred.JobConf-"> |
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| <h4>getInputPathFilter</h4> |
| <pre>public static <a href="../../../../org/apache/hadoop/fs/PathFilter.html" title="interface in org.apache.hadoop.fs">PathFilter</a> getInputPathFilter(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf)</pre> |
| <div class="block">Get a PathFilter instance of the filter set for the input paths.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the PathFilter instance set for the job, NULL if none has been set.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="addInputPathRecursively-java.util.List-org.apache.hadoop.fs.FileSystem-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.PathFilter-"> |
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| <h4>addInputPathRecursively</h4> |
| <pre>protected void addInputPathRecursively(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/hadoop/fs/FileStatus.html" title="class in org.apache.hadoop.fs">FileStatus</a>> result, |
| <a href="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs">FileSystem</a> fs, |
| <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> path, |
| <a href="../../../../org/apache/hadoop/fs/PathFilter.html" title="interface in org.apache.hadoop.fs">PathFilter</a> inputFilter) |
| 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">Add files in the input path recursively into the results.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>result</code> - The List to store all files.</dd> |
| <dd><code>fs</code> - The FileSystem.</dd> |
| <dd><code>path</code> - The input path.</dd> |
| <dd><code>inputFilter</code> - The input filter that can be used to filter files/dirs.</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="listStatus-org.apache.hadoop.mapred.JobConf-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>listStatus</h4> |
| <pre>protected <a href="../../../../org/apache/hadoop/fs/FileStatus.html" title="class in org.apache.hadoop.fs">FileStatus</a>[] listStatus(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job) |
| 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">List input directories. |
| Subclasses may override to, e.g., select only files matching a regular |
| expression. |
| |
| If security is enabled, this method collects |
| delegation tokens from the input paths and adds them to the job's |
| credentials.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>job</code> - the job to list input paths for and attach tokens to.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>array of FileStatus objects</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> - if zero items.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="makeSplit-org.apache.hadoop.fs.Path-long-long-java.lang.String:A-"> |
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| </a> |
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| <h4>makeSplit</h4> |
| <pre>protected <a href="../../../../org/apache/hadoop/mapred/FileSplit.html" title="class in org.apache.hadoop.mapred">FileSplit</a> makeSplit(<a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> file, |
| long start, |
| long length, |
| <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>[] hosts)</pre> |
| <div class="block">A factory that makes the split for this class. It can be overridden |
| by sub-classes to make sub-types</div> |
| </li> |
| </ul> |
| <a name="makeSplit-org.apache.hadoop.fs.Path-long-long-java.lang.String:A-java.lang.String:A-"> |
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| <h4>makeSplit</h4> |
| <pre>protected <a href="../../../../org/apache/hadoop/mapred/FileSplit.html" title="class in org.apache.hadoop.mapred">FileSplit</a> makeSplit(<a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> file, |
| long start, |
| long length, |
| <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>[] hosts, |
| <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>[] inMemoryHosts)</pre> |
| <div class="block">A factory that makes the split for this class. It can be overridden |
| by sub-classes to make sub-types</div> |
| </li> |
| </ul> |
| <a name="getSplits-org.apache.hadoop.mapred.JobConf-int-"> |
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| </a> |
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| <h4>getSplits</h4> |
| <pre>public <a href="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</a>[] getSplits(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> job, |
| int numSplits) |
| 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">Splits files returned by <a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html#listStatus-org.apache.hadoop.mapred.JobConf-"><code>listStatus(JobConf)</code></a> when |
| they're too big.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/hadoop/mapred/InputFormat.html#getSplits-org.apache.hadoop.mapred.JobConf-int-">getSplits</a></code> in interface <code><a href="../../../../org/apache/hadoop/mapred/InputFormat.html" title="interface in org.apache.hadoop.mapred">InputFormat</a><<a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html" title="type parameter in FileInputFormat">K</a>,<a href="../../../../org/apache/hadoop/mapred/FileInputFormat.html" title="type parameter in FileInputFormat">V</a>></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>job</code> - job configuration.</dd> |
| <dd><code>numSplits</code> - the desired number of splits, a hint.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an array of <a href="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred"><code>InputSplit</code></a>s for the job.</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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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>computeSplitSize</h4> |
| <pre>protected long computeSplitSize(long goalSize, |
| long minSize, |
| long blockSize)</pre> |
| </li> |
| </ul> |
| <a name="getBlockIndex-org.apache.hadoop.fs.BlockLocation:A-long-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getBlockIndex</h4> |
| <pre>protected int getBlockIndex(<a href="../../../../org/apache/hadoop/fs/BlockLocation.html" title="class in org.apache.hadoop.fs">BlockLocation</a>[] blkLocations, |
| long offset)</pre> |
| </li> |
| </ul> |
| <a name="setInputPaths-org.apache.hadoop.mapred.JobConf-java.lang.String-"> |
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| <h4>setInputPaths</h4> |
| <pre>public static void setInputPaths(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf, |
| <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> commaSeparatedPaths)</pre> |
| <div class="block">Sets the given comma separated paths as the list of inputs |
| for the map-reduce job.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - Configuration of the job</dd> |
| <dd><code>commaSeparatedPaths</code> - Comma separated paths to be set as |
| the list of inputs for the map-reduce job.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="addInputPaths-org.apache.hadoop.mapred.JobConf-java.lang.String-"> |
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| <h4>addInputPaths</h4> |
| <pre>public static void addInputPaths(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf, |
| <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> commaSeparatedPaths)</pre> |
| <div class="block">Add the given comma separated paths to the list of inputs for |
| the map-reduce job.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - The configuration of the job</dd> |
| <dd><code>commaSeparatedPaths</code> - Comma separated paths to be added to |
| the list of inputs for the map-reduce job.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="setInputPaths-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.fs.Path...-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setInputPaths</h4> |
| <pre>public static void setInputPaths(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf, |
| <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>... inputPaths)</pre> |
| <div class="block">Set the array of <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs"><code>Path</code></a>s as the list of inputs |
| for the map-reduce job.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - Configuration of the job.</dd> |
| <dd><code>inputPaths</code> - the <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs"><code>Path</code></a>s of the input directories/files |
| for the map-reduce job.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="addInputPath-org.apache.hadoop.mapred.JobConf-org.apache.hadoop.fs.Path-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>addInputPath</h4> |
| <pre>public static void addInputPath(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf, |
| <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a> path)</pre> |
| <div class="block">Add a <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs"><code>Path</code></a> to the list of inputs for the map-reduce job.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - The configuration of the job</dd> |
| <dd><code>path</code> - <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs"><code>Path</code></a> to be added to the list of inputs for |
| the map-reduce job.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getInputPaths-org.apache.hadoop.mapred.JobConf-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getInputPaths</h4> |
| <pre>public static <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</a>[] getInputPaths(<a href="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</a> conf)</pre> |
| <div class="block">Get the list of input <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs"><code>Path</code></a>s for the map-reduce job.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - The configuration of the job</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the list of input <a href="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs"><code>Path</code></a>s for the map-reduce job.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getSplitHosts-org.apache.hadoop.fs.BlockLocation:A-long-long-org.apache.hadoop.net.NetworkTopology-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getSplitHosts</h4> |
| <pre>protected <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>[] getSplitHosts(<a href="../../../../org/apache/hadoop/fs/BlockLocation.html" title="class in org.apache.hadoop.fs">BlockLocation</a>[] blkLocations, |
| long offset, |
| long splitSize, |
| org.apache.hadoop.net.NetworkTopology clusterMap) |
| 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">This function identifies and returns the hosts that contribute |
| most for a given split. For calculating the contribution, rack |
| locality is treated on par with host locality, so hosts from racks |
| that contribute the most are preferred over hosts on racks that |
| contribute less</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>blkLocations</code> - The list of block locations</dd> |
| <dd><code>offset</code> - </dd> |
| <dd><code>splitSize</code> - </dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an array of hosts that contribute most to this split</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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