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| <h2 title="Class HdfsDataInputStream" class="title">Class HdfsDataInputStream</h2> |
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| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">java.io.InputStream</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true" title="class or interface in java.io">java.io.FilterInputStream</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true" title="class or interface in java.io">java.io.DataInputStream</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html" title="class in org.apache.hadoop.fs">org.apache.hadoop.fs.FSDataInputStream</a></li> |
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| <li>org.apache.hadoop.hdfs.client.HdfsDataInputStream</li> |
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| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class <span class="typeNameLabel">HdfsDataInputStream</span> |
| extends <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html" title="class in org.apache.hadoop.fs">FSDataInputStream</a></pre> |
| <div class="block">The Hdfs implementation of <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html" title="class in org.apache.hadoop.fs"><code>FSDataInputStream</code></a>.</div> |
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| </a> |
| <h3>Fields inherited from class java.io.<a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true" title="class or interface in java.io">FilterInputStream</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true#in" title="class or interface in java.io">in</a></code></li> |
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| <h3>Fields inherited from interface org.apache.hadoop.fs.<a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html" title="interface in org.apache.hadoop.fs">StreamCapabilities</a></h3> |
| <code><a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html#ABORTABLE_STREAM">ABORTABLE_STREAM</a>, <a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html#DROPBEHIND">DROPBEHIND</a>, <a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html#HFLUSH">HFLUSH</a>, <a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html#HSYNC">HSYNC</a>, <a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html#IOSTATISTICS">IOSTATISTICS</a>, <a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html#PREADBYTEBUFFER">PREADBYTEBUFFER</a>, <a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html#READAHEAD">READAHEAD</a>, <a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html#READBYTEBUFFER">READBYTEBUFFER</a>, <a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html#UNBUFFER">UNBUFFER</a></code></li> |
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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> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataInputStream.html#HdfsDataInputStream-org.apache.hadoop.crypto.CryptoInputStream-">HdfsDataInputStream</a></span>(org.apache.hadoop.crypto.CryptoInputStream in)</code> </td> |
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| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataInputStream.html#HdfsDataInputStream-org.apache.hadoop.hdfs.DFSInputStream-">HdfsDataInputStream</a></span>(org.apache.hadoop.hdfs.DFSInputStream in)</code> </td> |
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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>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataInputStream.html#clearReadStatistics--">clearReadStatistics</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" 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.hdfs.protocol.LocatedBlock></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataInputStream.html#getAllBlocks--">getAllBlocks</a></span>()</code> |
| <div class="block">Get the collection of blocks that has already been located.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>org.apache.hadoop.hdfs.protocol.ExtendedBlock</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataInputStream.html#getCurrentBlock--">getCurrentBlock</a></span>()</code> |
| <div class="block">Get the block containing the target position.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>org.apache.hadoop.hdfs.protocol.DatanodeInfo</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataInputStream.html#getCurrentDatanode--">getCurrentDatanode</a></span>()</code> |
| <div class="block">Get the datanode from which the stream is currently reading.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>org.apache.hadoop.hdfs.ReadStatistics</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataInputStream.html#getReadStatistics--">getReadStatistics</a></span>()</code> |
| <div class="block">Get statistics about the reads which this DFSInputStream has done.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataInputStream.html#getVisibleLength--">getVisibleLength</a></span>()</code> |
| <div class="block">Get the visible length of the file.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataInputStream.html#getWrappedStream--">getWrappedStream</a></span>()</code> |
| <div class="block">Get a reference to the wrapped output stream.</div> |
| </td> |
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| <h3>Methods inherited from class org.apache.hadoop.fs.<a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html" title="class in org.apache.hadoop.fs">FSDataInputStream</a></h3> |
| <code><a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#getFileDescriptor--">getFileDescriptor</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#getIOStatistics--">getIOStatistics</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#getPos--">getPos</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#hasCapability-java.lang.String-">hasCapability</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#read-java.nio.ByteBuffer-">read</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#read-org.apache.hadoop.io.ByteBufferPool-int-">read</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#read-org.apache.hadoop.io.ByteBufferPool-int-java.util.EnumSet-">read</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#read-long-byte:A-int-int-">read</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#read-long-java.nio.ByteBuffer-">read</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#readFully-long-byte:A-">readFully</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#readFully-long-byte:A-int-int-">readFully</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#readFully-long-java.nio.ByteBuffer-">readFully</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#releaseBuffer-java.nio.ByteBuffer-">releaseBuffer</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#seek-long-">seek</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#seekToNewSource-long-">seekToNewSource</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#setDropBehind-java.lang.Boolean-">setDropBehind</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#setReadahead-java.lang.Long-">setReadahead</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#toString--">toString</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataInputStream.html#unbuffer--">unbuffer</a></code></li> |
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| <h3>Methods inherited from class java.io.<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true" title="class or interface in java.io">DataInputStream</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#read-byte:A-" title="class or interface in java.io">read</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#read-byte:A-int-int-" title="class or interface in java.io">read</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readBoolean--" title="class or interface in java.io">readBoolean</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readByte--" title="class or interface in java.io">readByte</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readChar--" title="class or interface in java.io">readChar</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readDouble--" title="class or interface in java.io">readDouble</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readFloat--" title="class or interface in java.io">readFloat</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readFully-byte:A-" title="class or interface in java.io">readFully</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readFully-byte:A-int-int-" title="class or interface in java.io">readFully</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readInt--" title="class or interface in java.io">readInt</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readLine--" title="class or interface in java.io">readLine</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readLong--" title="class or interface in java.io">readLong</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readShort--" title="class or interface in java.io">readShort</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readUnsignedByte--" title="class or interface in java.io">readUnsignedByte</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readUnsignedShort--" title="class or interface in java.io">readUnsignedShort</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readUTF--" title="class or interface in java.io">readUTF</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#readUTF-java.io.DataInput-" title="class or interface in java.io">readUTF</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataInputStream.html?is-external=true#skipBytes-int-" title="class or interface in java.io">skipBytes</a></code></li> |
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| <h3>Methods inherited from class java.io.<a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true" title="class or interface in java.io">FilterInputStream</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true#available--" title="class or interface in java.io">available</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true#close--" title="class or interface in java.io">close</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true#mark-int-" title="class or interface in java.io">mark</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true#markSupported--" title="class or interface in java.io">markSupported</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true#read--" title="class or interface in java.io">read</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true#reset--" title="class or interface in java.io">reset</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterInputStream.html?is-external=true#skip-long-" title="class or interface in java.io">skip</a></code></li> |
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| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#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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| <h4>HdfsDataInputStream</h4> |
| <pre>public HdfsDataInputStream(org.apache.hadoop.hdfs.DFSInputStream in)</pre> |
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| <h4>HdfsDataInputStream</h4> |
| <pre>public HdfsDataInputStream(org.apache.hadoop.crypto.CryptoInputStream in)</pre> |
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| <h4>getWrappedStream</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a> getWrappedStream()</pre> |
| <div class="block">Get a reference to the wrapped output stream. We always want to return the |
| actual underlying InputStream, even when we're using a CryptoStream. e.g. |
| in the delegated methods below.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the underlying output stream</dd> |
| </dl> |
| </li> |
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| <a name="getCurrentDatanode--"> |
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| <h4>getCurrentDatanode</h4> |
| <pre>public org.apache.hadoop.hdfs.protocol.DatanodeInfo getCurrentDatanode()</pre> |
| <div class="block">Get the datanode from which the stream is currently reading.</div> |
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| <pre>public org.apache.hadoop.hdfs.protocol.ExtendedBlock getCurrentBlock()</pre> |
| <div class="block">Get the block containing the target position.</div> |
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| <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.hdfs.protocol.LocatedBlock> getAllBlocks() |
| 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">Get the collection of blocks that has already been located.</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> |
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| <h4>getVisibleLength</h4> |
| <pre>public long getVisibleLength()</pre> |
| <div class="block">Get the visible length of the file. It will include the length of the last |
| block even if that is in UnderConstruction state.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The visible length of the file.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>getReadStatistics</h4> |
| <pre>public org.apache.hadoop.hdfs.ReadStatistics getReadStatistics()</pre> |
| <div class="block">Get statistics about the reads which this DFSInputStream has done. |
| Note that because HdfsDataInputStream is buffered, these stats may |
| be higher than you would expect just by adding up the number of |
| bytes read through HdfsDataInputStream.</div> |
| </li> |
| </ul> |
| <a name="clearReadStatistics--"> |
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| </a> |
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| <h4>clearReadStatistics</h4> |
| <pre>public void clearReadStatistics()</pre> |
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