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<h2 title="Uses of Class org.apache.hadoop.hbase.nio.RefCnt" class="title">Uses of Class<br>org.apache.hadoop.hbase.nio.RefCnt</h2>
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<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing packages, and an explanation">
<caption><span>Packages that use <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Package</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.hbase.io.hfile.bucket">org.apache.hadoop.hbase.io.hfile.bucket</a></td>
<td class="colLast">
<div class="block">Provides <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketCache</code></a>, an implementation of
<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/BlockCache.html" title="interface in org.apache.hadoop.hbase.io.hfile"><code>BlockCache</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><a href="#org.apache.hadoop.hbase.nio">org.apache.hadoop.hbase.nio</a></td>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><a href="#org.apache.hadoop.hbase.regionserver">org.apache.hadoop.hbase.regionserver</a></td>
<td class="colLast">&nbsp;</td>
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</tbody>
</table>
</li>
<li class="blockList">
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<li class="blockList"><a name="org.apache.hadoop.hbase.io.hfile.bucket">
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<h3>Uses of <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a> in <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/package-summary.html">org.apache.hadoop.hbase.io.hfile.bucket</a></h3>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing fields, and an explanation">
<caption><span>Fields in <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/package-summary.html">org.apache.hadoop.hbase.io.hfile.bucket</a> declared as <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></code></td>
<td class="colLast"><span class="typeNameLabel">BucketEntry.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html#refCnt">refCnt</a></span></code>
<div class="block">
The RefCnt means how many paths are referring the <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a>, there are two cases:
1.If the <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html#usesSharedMemory--"><code>IOEngine.usesSharedMemory()</code></a> is false(eg.<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>FileIOEngine</code></a>),the refCnt is
always 1 until this <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketEntry.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketEntry</code></a> is evicted from <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html#backingMap"><code>BucketCache.backingMap</code></a>.Even
if the corresponding <code>HFileBlock</code> is referenced by RPC reading, the refCnt should not
increase.</div>
</td>
</tr>
</tbody>
</table>
</li>
<li class="blockList"><a name="org.apache.hadoop.hbase.nio">
<!-- -->
</a>
<h3>Uses of <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a> in <a href="../../../../../../org/apache/hadoop/hbase/nio/package-summary.html">org.apache.hadoop.hbase.nio</a></h3>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing fields, and an explanation">
<caption><span>Fields in <a href="../../../../../../org/apache/hadoop/hbase/nio/package-summary.html">org.apache.hadoop.hbase.nio</a> declared as <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></code></td>
<td class="colLast"><span class="typeNameLabel">ByteBuff.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html#refCnt">refCnt</a></span></code>&nbsp;</td>
</tr>
</tbody>
</table>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing fields, and an explanation">
<caption><span>Fields in <a href="../../../../../../org/apache/hadoop/hbase/nio/package-summary.html">org.apache.hadoop.hbase.nio</a> with type parameters of type <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>private static org.apache.hbase.thirdparty.io.netty.util.ResourceLeakDetector&lt;<a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a>&gt;</code></td>
<td class="colLast"><span class="typeNameLabel">RefCnt.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html#detector">detector</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private org.apache.hbase.thirdparty.io.netty.util.ResourceLeakTracker&lt;<a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a>&gt;</code></td>
<td class="colLast"><span class="typeNameLabel">RefCnt.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html#leak">leak</a></span></code>&nbsp;</td>
</tr>
</tbody>
</table>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing methods, and an explanation">
<caption><span>Methods in <a href="../../../../../../org/apache/hadoop/hbase/nio/package-summary.html">org.apache.hadoop.hbase.nio</a> that return <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></code></td>
<td class="colLast"><span class="typeNameLabel">RefCnt.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html#create--">create</a></span>()</code>
<div class="block">Create an <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio"><code>RefCnt</code></a> with an initial reference count = 1.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></code></td>
<td class="colLast"><span class="typeNameLabel">RefCnt.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html#create-org.apache.hadoop.hbase.io.ByteBuffAllocator.Recycler-">create</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/io/ByteBuffAllocator.Recycler.html" title="interface in org.apache.hadoop.hbase.io">ByteBuffAllocator.Recycler</a>&nbsp;recycler)</code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></code></td>
<td class="colLast"><span class="typeNameLabel">ByteBuff.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html#getRefCnt--">getRefCnt</a></span>()</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></code></td>
<td class="colLast"><span class="typeNameLabel">RefCnt.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html#touch--">touch</a></span>()</code>&nbsp;</td>
</tr>
</tbody>
</table>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing methods, and an explanation">
<caption><span>Methods in <a href="../../../../../../org/apache/hadoop/hbase/nio/package-summary.html">org.apache.hadoop.hbase.nio</a> with parameters of type <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a></code></td>
<td class="colLast"><span class="typeNameLabel">ByteBuff.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html#wrap-java.nio.ByteBuffer:A-org.apache.hadoop.hbase.nio.RefCnt-">wrap</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;buffers,
<a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a>&nbsp;refCnt)</code>
<div class="block">In theory, the upstream should never construct an ByteBuff by passing an given refCnt, so
please don't use this public method in other place.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private static <a href="../../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a></code></td>
<td class="colLast"><span class="typeNameLabel">ByteBuff.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html#wrap-java.nio.ByteBuffer-org.apache.hadoop.hbase.nio.RefCnt-">wrap</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;buffer,
<a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a>&nbsp;refCnt)</code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private static <a href="../../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a></code></td>
<td class="colLast"><span class="typeNameLabel">ByteBuff.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html#wrap-java.util.List-org.apache.hadoop.hbase.nio.RefCnt-">wrap</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>&lt;<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>&gt;&nbsp;buffers,
<a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a>&nbsp;refCnt)</code>&nbsp;</td>
</tr>
</tbody>
</table>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing constructors, and an explanation">
<caption><span>Constructors in <a href="../../../../../../org/apache/hadoop/hbase/nio/package-summary.html">org.apache.hadoop.hbase.nio</a> with parameters of type <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/MultiByteBuff.html#MultiByteBuff-org.apache.hadoop.hbase.nio.RefCnt-java.nio.ByteBuffer...-">MultiByteBuff</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a>&nbsp;refCnt,
<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;items)</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/MultiByteBuff.html#MultiByteBuff-org.apache.hadoop.hbase.nio.RefCnt-java.nio.ByteBuffer:A-int:A-int-int-int-int-">MultiByteBuff</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a>&nbsp;refCnt,
<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;items,
int[]&nbsp;itemBeginPos,
int&nbsp;limit,
int&nbsp;limitedIndex,
int&nbsp;curItemIndex,
int&nbsp;markedIndex)</code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/nio/SingleByteBuff.html#SingleByteBuff-org.apache.hadoop.hbase.nio.RefCnt-java.nio.ByteBuffer-">SingleByteBuff</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a>&nbsp;refCnt,
<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;buf)</code>&nbsp;</td>
</tr>
</tbody>
</table>
</li>
<li class="blockList"><a name="org.apache.hadoop.hbase.regionserver">
<!-- -->
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<h3>Uses of <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a> in <a href="../../../../../../org/apache/hadoop/hbase/regionserver/package-summary.html">org.apache.hadoop.hbase.regionserver</a></h3>
<table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing fields, and an explanation">
<caption><span>Fields in <a href="../../../../../../org/apache/hadoop/hbase/regionserver/package-summary.html">org.apache.hadoop.hbase.regionserver</a> declared as <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tbody>
<tr class="altColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></code></td>
<td class="colLast"><span class="typeNameLabel">ImmutableMemStoreLAB.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/ImmutableMemStoreLAB.html#refCnt">refCnt</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/nio/RefCnt.html" title="class in org.apache.hadoop.hbase.nio">RefCnt</a></code></td>
<td class="colLast"><span class="typeNameLabel">MemStoreLABImpl.</span><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/MemStoreLABImpl.html#refCnt">refCnt</a></span></code>
<div class="block">Its initial value is 1, so it is one bigger than the current count of open scanners which
reading data from this MemStoreLAB.</div>
</td>
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