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<div class="subTitle">org.apache.hadoop.hbase.io</div>
<h2 title="Class ByteBufferWriterOutputStream" class="title">Class ByteBufferWriterOutputStream</h2>
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<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>
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<li>org.apache.hadoop.hbase.io.ByteBufferWriterOutputStream</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/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/hbase/io/ByteBufferWriter.html" title="interface in org.apache.hadoop.hbase.io">ByteBufferWriter</a></dd>
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<pre>@InterfaceAudience.Private
public class <a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.42">ByteBufferWriterOutputStream</a>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>
implements <a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriter.html" title="interface in org.apache.hadoop.hbase.io">ByteBufferWriter</a></pre>
<div class="block">When deal with OutputStream which is not ByteBufferWriter type, wrap it with this class. We will
have to write offheap ByteBuffer (DBB) data into the OS. This class is having a temp byte array
to which we can copy the DBB data for writing to the OS.
<br>
This is used while writing Cell data to WAL. In case of AsyncWAL, the OS created there is
ByteBufferWriter. But in case of FSHLog, the OS passed by DFS client, is not of type
ByteBufferWriter. We will need this temp solution until DFS client supports writing ByteBuffer
directly to the OS it creates.
<br>
Note: This class is not thread safe.</div>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>private byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#buf">buf</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#bufSize">bufSize</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>private static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#DEFAULT_BUFFER_SIZE">DEFAULT_BUFFER_SIZE</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#os">os</a></span></code>&nbsp;</td>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#ByteBufferWriterOutputStream-java.io.OutputStream-">ByteBufferWriterOutputStream</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;os)</code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#ByteBufferWriterOutputStream-java.io.OutputStream-int-">ByteBufferWriterOutputStream</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;os,
int&nbsp;size)</code>&nbsp;</td>
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<th class="colLast" scope="col">Method and Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#close--">close</a></span>()</code>&nbsp;</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#flush--">flush</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#write-byte:A-int-int-">write</a></span>(byte[]&nbsp;b,
int&nbsp;off,
int&nbsp;len)</code>&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#write-java.nio.ByteBuffer-int-int-">write</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;b,
int&nbsp;off,
int&nbsp;len)</code>
<div class="block">Writes len bytes from the specified ByteBuffer starting at offset off to this OutputStream.</div>
</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#write-int-">write</a></span>(int&nbsp;b)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#writeInt-int-">writeInt</a></span>(int&nbsp;i)</code>
<div class="block">Writes an <code>int</code> to the underlying output stream as four bytes, high byte first.</div>
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<h3>Methods inherited from class&nbsp;java.io.<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.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#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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<pre>private static final&nbsp;int <a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.45">DEFAULT_BUFFER_SIZE</a></pre>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../constant-values.html#org.apache.hadoop.hbase.io.ByteBufferWriterOutputStream.DEFAULT_BUFFER_SIZE">Constant Field Values</a></dd>
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<pre>private final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.47">os</a></pre>
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<pre>private final&nbsp;int <a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.48">bufSize</a></pre>
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<pre>private&nbsp;byte[] <a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.49">buf</a></pre>
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<pre>public&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.51">ByteBufferWriterOutputStream</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;os)</pre>
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<pre>public&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.55">ByteBufferWriterOutputStream</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;os,
int&nbsp;size)</pre>
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<h4>write</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.74">write</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;b,
int&nbsp;off,
int&nbsp;len)
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">Writes len bytes from the specified ByteBuffer starting at offset off to this OutputStream. If
off is negative or larger than the ByteBuffer then an ArrayIndexOutOfBoundsException is thrown.
If len is greater than the length of the ByteBuffer, then an ArrayIndexOutOfBoundsException is
thrown. This method does not change the position of the ByteBuffer.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriter.html#write-java.nio.ByteBuffer-int-int-">write</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriter.html" title="interface in org.apache.hadoop.hbase.io">ByteBufferWriter</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>b</code> - the ByteBuffer</dd>
<dd><code>off</code> - the start offset in the data</dd>
<dd><code>len</code> - the number of bytes to write</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 an I/O error occurs. In particular, an IOException is thrown if the
output stream is closed.</dd>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if <code>b</code> is <code>null</code></dd>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.92">writeInt</a>(int&nbsp;i)
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:&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriter.html#writeInt-int-">ByteBufferWriter</a></code></span></div>
<div class="block">Writes an <code>int</code> to the underlying output stream as four bytes, high byte first.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriter.html#writeInt-int-">writeInt</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/hadoop/hbase/io/ByteBufferWriter.html" title="interface in org.apache.hadoop.hbase.io">ByteBufferWriter</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>i</code> - the <code>int</code> to write</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 an I/O error occurs.</dd>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.97">write</a>(int&nbsp;b)
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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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true#write-int-" title="class or interface in java.io">write</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></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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<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.102">write</a>(byte[]&nbsp;b,
int&nbsp;off,
int&nbsp;len)
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="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true#write-byte:A-int-int-" title="class or interface in java.io">write</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></dd>
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<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>flush</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.107">flush</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>
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<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Flushable.html?is-external=true#flush--" title="class or interface in java.io">flush</a></code>&nbsp;in interface&nbsp;<code><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></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true#flush--" title="class or interface in java.io">flush</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></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>close</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.html#line.112">close</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>
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<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code>&nbsp;in interface&nbsp;<code><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></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true#close--" title="class or interface in java.io">close</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a></code></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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