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| <h2 title="Class ByteBufferArray" class="title">Class ByteBufferArray</h2> |
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| <li>org.apache.hadoop.hbase.util.ByteBufferArray</li> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/util/ByteBufferArray.html#line.43">ByteBufferArray</a> |
| 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></pre> |
| <div class="block">This class manages an array of ByteBuffers with a default size 4MB. These buffers are sequential |
| and could be considered as a large buffer.It supports reading/writing data from this large buffer |
| with a position and offset</div> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.BufferIterator.html" title="class in org.apache.hadoop.hbase.util">ByteBufferArray.BufferIterator</a></span></code> |
| <div class="block">Iterator to fetch ByteBuffers from offset with given length in this big logical array.</div> |
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| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#bufferCount">bufferCount</a></span></code> </td> |
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| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) <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>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#buffers">buffers</a></span></code> </td> |
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| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#bufferSize">bufferSize</a></span></code> </td> |
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| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#DEFAULT_BUFFER_SIZE">DEFAULT_BUFFER_SIZE</a></span></code> </td> |
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| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#LOG">LOG</a></span></code> </td> |
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| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BiConsumer.html?is-external=true" title="class or interface in java.util.function">BiConsumer</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>,<a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a>></code></td> |
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| <div class="block">Transfer bytes from source <a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio"><code>ByteBuffer</code></a> to destination <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio"><code>ByteBuff</code></a>, Position of both |
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| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BiConsumer.html?is-external=true" title="class or interface in java.util.function">BiConsumer</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>,<a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a>></code></td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#ByteBufferArray-int-int-int-long-org.apache.hadoop.hbase.util.ByteBufferAllocator-">ByteBufferArray</a></span>(int bufferSize, |
| int bufferCount, |
| int threadCount, |
| long capacity, |
| <a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferAllocator.html" title="interface in org.apache.hadoop.hbase.util">ByteBufferAllocator</a> alloc)</code> </td> |
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| <a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferAllocator.html" title="interface in org.apache.hadoop.hbase.util">ByteBufferAllocator</a> allocator)</code> |
| <div class="block">We allocate a number of byte buffers as the capacity.</div> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><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>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#asSubByteBuffers-long-int-">asSubByteBuffers</a></span>(long offset, |
| int len)</code> |
| <div class="block">Creates a sub-array from a given array of ByteBuffers from the given offset to the length |
| specified.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#createBuffers-int-org.apache.hadoop.hbase.util.ByteBufferAllocator-">createBuffers</a></span>(int threadCount, |
| <a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferAllocator.html" title="interface in org.apache.hadoop.hbase.util">ByteBufferAllocator</a> alloc)</code> </td> |
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| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>private static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#getBufferCount-long-">getBufferCount</a></span>(long capacity)</code> </td> |
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| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>(package private) static int</code></td> |
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| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#internalTransfer-long-org.apache.hadoop.hbase.nio.ByteBuff-java.util.function.BiConsumer-">internalTransfer</a></span>(long offset, |
| <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a> b, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BiConsumer.html?is-external=true" title="class or interface in java.util.function">BiConsumer</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>,<a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a>> transfer)</code> |
| <div class="block">Transferring all remaining bytes from b to the buffers array starting at offset, or |
| transferring bytes from the buffers array at offset to b until b is filled.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#read-long-org.apache.hadoop.hbase.nio.ByteBuff-">read</a></span>(long offset, |
| <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a> dst)</code> |
| <div class="block">Transfers bytes from this buffers array into the given destination <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio"><code>ByteBuff</code></a></div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>private static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#roundUp-long-long-">roundUp</a></span>(long n, |
| long to)</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferArray.html#write-long-org.apache.hadoop.hbase.nio.ByteBuff-">write</a></span>(long offset, |
| <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a> src)</code> |
| <div class="block">Transfers bytes from the given source <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio"><code>ByteBuff</code></a> into this buffer array</div> |
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| <div class="block">Transfer bytes from source <a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio"><code>ByteBuffer</code></a> to destination <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio"><code>ByteBuff</code></a>, Position of both |
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| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/util/ByteBufferArray.html#line.57">ByteBufferArray</a>(long capacity, |
| <a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferAllocator.html" title="interface in org.apache.hadoop.hbase.util">ByteBufferAllocator</a> allocator) |
| 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">We allocate a number of byte buffers as the capacity.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>capacity</code> - total size of the byte buffer array</dd> |
| <dd><code>allocator</code> - the ByteBufferAllocator that will create the buffers</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> - throws IOException if there is an exception thrown by the allocator</dd> |
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| <pre><a href="../../../../../src-html/org/apache/hadoop/hbase/util/ByteBufferArray.html#line.62">ByteBufferArray</a>(int bufferSize, |
| int bufferCount, |
| int threadCount, |
| long capacity, |
| <a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferAllocator.html" title="interface in org.apache.hadoop.hbase.util">ByteBufferAllocator</a> alloc) |
| 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>private void <a href="../../../../../src-html/org/apache/hadoop/hbase/util/ByteBufferArray.html#line.72">createBuffers</a>(int threadCount, |
| <a href="../../../../../org/apache/hadoop/hbase/util/ByteBufferAllocator.html" title="interface in org.apache.hadoop.hbase.util">ByteBufferAllocator</a> alloc) |
| 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>static int <a href="../../../../../src-html/org/apache/hadoop/hbase/util/ByteBufferArray.html#line.107">getBufferSize</a>(long capacity)</pre> |
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| long to)</pre> |
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| <pre>public int <a href="../../../../../src-html/org/apache/hadoop/hbase/util/ByteBufferArray.html#line.130">read</a>(long offset, |
| <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a> dst)</pre> |
| <div class="block">Transfers bytes from this buffers array into the given destination <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio"><code>ByteBuff</code></a></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>offset</code> - start position in this big logical array.</dd> |
| <dd><code>dst</code> - the destination ByteBuff. Notice that its position will be advanced.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>number of bytes read</dd> |
| </dl> |
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| <pre>public int <a href="../../../../../src-html/org/apache/hadoop/hbase/util/ByteBufferArray.html#line.140">write</a>(long offset, |
| <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a> src)</pre> |
| <div class="block">Transfers bytes from the given source <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio"><code>ByteBuff</code></a> into this buffer array</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>offset</code> - start offset of this big logical array.</dd> |
| <dd><code>src</code> - the source ByteBuff. Notice that its position will be advanced.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>number of bytes write</dd> |
| </dl> |
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| <a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a> b, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BiConsumer.html?is-external=true" title="class or interface in java.util.function">BiConsumer</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>,<a href="../../../../../org/apache/hadoop/hbase/nio/ByteBuff.html" title="class in org.apache.hadoop.hbase.nio">ByteBuff</a>> transfer)</pre> |
| <div class="block">Transferring all remaining bytes from b to the buffers array starting at offset, or |
| transferring bytes from the buffers array at offset to b until b is filled. Notice that |
| position of ByteBuff b will be advanced.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>offset</code> - where we start in the big logical array.</dd> |
| <dd><code>b</code> - the ByteBuff to transfer from or to</dd> |
| <dd><code>transfer</code> - the transfer interface.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the length of bytes we transferred.</dd> |
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| <pre>public <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>[] <a href="../../../../../src-html/org/apache/hadoop/hbase/util/ByteBufferArray.html#line.201">asSubByteBuffers</a>(long offset, |
| int len)</pre> |
| <div class="block">Creates a sub-array from a given array of ByteBuffers from the given offset to the length |
| specified. For eg, if there are 4 buffers forming an array each with length 10 and if we call |
| asSubByteBuffers(5, 10) then we will create an sub-array consisting of two BBs and the first |
| one be a BB from 'position' 5 to a 'length' 5 and the 2nd BB will be from 'position' 0 to |
| 'length' 5.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>offset</code> - the position in the whole array which is composited by multiple byte buffers.</dd> |
| <dd><code>len</code> - the length of bytes</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the underlying ByteBuffers, each ByteBuffer is a slice from the backend and will have a |
| zero position.</dd> |
| </dl> |
| </li> |
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