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| <h2 title="Class HdfsDataOutputStream" class="title">Class HdfsDataOutputStream</h2> |
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| <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><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">java.io.OutputStream</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterOutputStream.html?is-external=true" title="class or interface in java.io">java.io.FilterOutputStream</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true" title="class or interface in java.io">java.io.DataOutputStream</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html" title="class in org.apache.hadoop.fs">org.apache.hadoop.fs.FSDataOutputStream</a></li> |
| <li> |
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| <li>org.apache.hadoop.hdfs.client.HdfsDataOutputStream</li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><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>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutput.html?is-external=true" title="class or interface in java.io">DataOutput</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Flushable.html?is-external=true" title="class or interface in java.io">Flushable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a>, <a href="../../../../../org/apache/hadoop/fs/Abortable.html" title="interface in org.apache.hadoop.fs">Abortable</a>, <a href="../../../../../org/apache/hadoop/fs/CanSetDropBehind.html" title="interface in org.apache.hadoop.fs">CanSetDropBehind</a>, org.apache.hadoop.fs.statistics.IOStatisticsSource, <a href="../../../../../org/apache/hadoop/fs/StreamCapabilities.html" title="interface in org.apache.hadoop.fs">StreamCapabilities</a>, <a href="../../../../../org/apache/hadoop/fs/Syncable.html" title="interface in org.apache.hadoop.fs">Syncable</a></dd> |
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| <hr> |
| <br> |
| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class <span class="typeNameLabel">HdfsDataOutputStream</span> |
| extends <a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html" title="class in org.apache.hadoop.fs">FSDataOutputStream</a></pre> |
| <div class="block">The Hdfs implementation of <a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html" title="class in org.apache.hadoop.fs"><code>FSDataOutputStream</code></a>.</div> |
| </li> |
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| <li class="blockList"><a name="fields.inherited.from.class.java.io.DataOutputStream"> |
| <!-- --> |
| </a> |
| <h3>Fields inherited from class java.io.<a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true" title="class or interface in java.io">DataOutputStream</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#written" title="class or interface in java.io">written</a></code></li> |
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| <h3>Fields inherited from class java.io.<a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterOutputStream.html?is-external=true" title="class or interface in java.io">FilterOutputStream</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterOutputStream.html?is-external=true#out" title="class or interface in java.io">out</a></code></li> |
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| <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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| <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/HdfsDataOutputStream.html#HdfsDataOutputStream-org.apache.hadoop.crypto.CryptoOutputStream-org.apache.hadoop.fs.FileSystem.Statistics-">HdfsDataOutputStream</a></span>(org.apache.hadoop.crypto.CryptoOutputStream out, |
| org.apache.hadoop.fs.FileSystem.Statistics stats)</code> </td> |
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| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataOutputStream.html#HdfsDataOutputStream-org.apache.hadoop.crypto.CryptoOutputStream-org.apache.hadoop.fs.FileSystem.Statistics-long-">HdfsDataOutputStream</a></span>(org.apache.hadoop.crypto.CryptoOutputStream out, |
| org.apache.hadoop.fs.FileSystem.Statistics stats, |
| long startPosition)</code> </td> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataOutputStream.html#HdfsDataOutputStream-org.apache.hadoop.hdfs.DFSOutputStream-org.apache.hadoop.fs.FileSystem.Statistics-">HdfsDataOutputStream</a></span>(org.apache.hadoop.hdfs.DFSOutputStream out, |
| org.apache.hadoop.fs.FileSystem.Statistics stats)</code> </td> |
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| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataOutputStream.html#HdfsDataOutputStream-org.apache.hadoop.hdfs.DFSOutputStream-org.apache.hadoop.fs.FileSystem.Statistics-long-">HdfsDataOutputStream</a></span>(org.apache.hadoop.hdfs.DFSOutputStream out, |
| org.apache.hadoop.fs.FileSystem.Statistics stats, |
| long startPosition)</code> </td> |
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| <h3>Method Summary</h3> |
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| <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> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataOutputStream.html#getCurrentBlockReplication--">getCurrentBlockReplication</a></span>()</code> |
| <div class="block">Get the actual number of replicas of the current block.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/client/HdfsDataOutputStream.html#hsync-java.util.EnumSet-">hsync</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/EnumSet.html?is-external=true" title="class or interface in java.util">EnumSet</a><org.apache.hadoop.hdfs.client.HdfsDataOutputStream.SyncFlag> syncFlags)</code> |
| <div class="block">Sync buffered data to DataNodes (flush to disk devices).</div> |
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| <h3>Methods inherited from class org.apache.hadoop.fs.<a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html" title="class in org.apache.hadoop.fs">FSDataOutputStream</a></h3> |
| <code><a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html#abort--">abort</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html#close--">close</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html#getIOStatistics--">getIOStatistics</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html#getPos--">getPos</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html#hasCapability-java.lang.String-">hasCapability</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html#hflush--">hflush</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html#hsync--">hsync</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html#setDropBehind-java.lang.Boolean-">setDropBehind</a>, <a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html#toString--">toString</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/DataOutputStream.html?is-external=true" title="class or interface in java.io">DataOutputStream</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#flush--" title="class or interface in java.io">flush</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#size--" title="class or interface in java.io">size</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#write-byte:A-int-int-" title="class or interface in java.io">write</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#write-int-" title="class or interface in java.io">write</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeBoolean-boolean-" title="class or interface in java.io">writeBoolean</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeByte-int-" title="class or interface in java.io">writeByte</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeBytes-java.lang.String-" title="class or interface in java.io">writeBytes</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeChar-int-" title="class or interface in java.io">writeChar</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeChars-java.lang.String-" title="class or interface in java.io">writeChars</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeDouble-double-" title="class or interface in java.io">writeDouble</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeFloat-float-" title="class or interface in java.io">writeFloat</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeInt-int-" title="class or interface in java.io">writeInt</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeLong-long-" title="class or interface in java.io">writeLong</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeShort-int-" title="class or interface in java.io">writeShort</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutputStream.html?is-external=true#writeUTF-java.lang.String-" title="class or interface in java.io">writeUTF</a></code></li> |
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| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/FilterOutputStream.html?is-external=true#write-byte:A-" title="class or interface in java.io">write</a></code></li> |
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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#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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| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/DataOutput.html?is-external=true#write-byte:A-" title="class or interface in java.io">write</a></code></li> |
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| <pre>public HdfsDataOutputStream(org.apache.hadoop.hdfs.DFSOutputStream out, |
| org.apache.hadoop.fs.FileSystem.Statistics stats, |
| long startPosition) |
| 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> |
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| <pre>public HdfsDataOutputStream(org.apache.hadoop.hdfs.DFSOutputStream out, |
| org.apache.hadoop.fs.FileSystem.Statistics stats) |
| 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> |
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| <pre>public HdfsDataOutputStream(org.apache.hadoop.crypto.CryptoOutputStream out, |
| org.apache.hadoop.fs.FileSystem.Statistics stats, |
| long startPosition) |
| 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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| <h4>HdfsDataOutputStream</h4> |
| <pre>public HdfsDataOutputStream(org.apache.hadoop.crypto.CryptoOutputStream out, |
| org.apache.hadoop.fs.FileSystem.Statistics stats) |
| 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> |
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| <h4>getCurrentBlockReplication</h4> |
| <pre>public int getCurrentBlockReplication() |
| 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 actual number of replicas of the current block. |
| |
| This can be different from the designated replication factor of the file |
| because the namenode does not maintain replication for the blocks which are |
| currently being written to. Depending on the configuration, the client may |
| continue to write to a block even if a few datanodes in the write pipeline |
| have failed, or the client may add a new datanodes once a datanode has |
| failed.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the number of valid replicas of the current block</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
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| <h4>hsync</h4> |
| <pre>public void hsync(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/EnumSet.html?is-external=true" title="class or interface in java.util">EnumSet</a><org.apache.hadoop.hdfs.client.HdfsDataOutputStream.SyncFlag> syncFlags) |
| 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">Sync buffered data to DataNodes (flush to disk devices).</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>syncFlags</code> - Indicate the detailed semantic and actions of the hsync.</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> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/hadoop/fs/FSDataOutputStream.html#hsync--"><code>FSDataOutputStream.hsync()</code></a></dd> |
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