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| <div class="subTitle">org.apache.hadoop.hbase.io.hfile</div> |
| <h2 title="Class LruCachedBlockQueue" class="title">Class LruCachedBlockQueue</h2> |
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| <li>org.apache.hadoop.hbase.io.hfile.LruCachedBlockQueue</li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../../org/apache/hadoop/hbase/io/HeapSize.html" title="interface in org.apache.hadoop.hbase.io">HeapSize</a></dd> |
| </dl> |
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| <br> |
| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#line.40">LruCachedBlockQueue</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> |
| implements <a href="../../../../../../org/apache/hadoop/hbase/io/HeapSize.html" title="interface in org.apache.hadoop.hbase.io">HeapSize</a></pre> |
| <div class="block">A memory-bound queue that will grow until an element brings |
| total size >= maxSize. From then on, only entries that are sorted larger |
| than the smallest current entry will be inserted/replaced. |
| |
| <p>Use this when you want to find the largest elements (according to their |
| ordering, not their heap size) that consume as close to the specified |
| maxSize as possible. Default behavior is to grow just above rather than |
| just below specified max. |
| |
| <p>Object used in this queue must implement <a href="../../../../../../org/apache/hadoop/hbase/io/HeapSize.html" title="interface in org.apache.hadoop.hbase.io"><code>HeapSize</code></a> as well as |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang"><code>Comparable</code></a>.</div> |
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| <th class="colLast" scope="col">Field and Description</th> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#heapSize">heapSize</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#maxSize">maxSize</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private org.apache.hbase.thirdparty.com.google.common.collect.MinMaxPriorityQueue<<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlock.html" title="class in org.apache.hadoop.hbase.io.hfile">LruCachedBlock</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#queue">queue</a></span></code> </td> |
| </tr> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#LruCachedBlockQueue-long-long-">LruCachedBlockQueue</a></span>(long maxSize, |
| long blockSize)</code> </td> |
| </tr> |
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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/hfile/LruCachedBlockQueue.html#add-org.apache.hadoop.hbase.io.hfile.LruCachedBlock-">add</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlock.html" title="class in org.apache.hadoop.hbase.io.hfile">LruCachedBlock</a> cb)</code> |
| <div class="block">Attempt to add the specified cached block to this queue.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#heapSize--">heapSize</a></span>()</code> |
| <div class="block">Total size of all elements in this queue.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlock.html" title="class in org.apache.hadoop.hbase.io.hfile">LruCachedBlock</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#poll--">poll</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlock.html" title="class in org.apache.hadoop.hbase.io.hfile">LruCachedBlock</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#pollLast--">pollLast</a></span>()</code> </td> |
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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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| </a> |
| <h3>Field Detail</h3> |
| <a name="queue"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>queue</h4> |
| <pre>private org.apache.hbase.thirdparty.com.google.common.collect.MinMaxPriorityQueue<<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlock.html" title="class in org.apache.hadoop.hbase.io.hfile">LruCachedBlock</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#line.42">queue</a></pre> |
| </li> |
| </ul> |
| <a name="heapSize"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>heapSize</h4> |
| <pre>private long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#line.44">heapSize</a></pre> |
| </li> |
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| <h4>maxSize</h4> |
| <pre>private long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#line.45">maxSize</a></pre> |
| </li> |
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| <h4>LruCachedBlockQueue</h4> |
| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#line.51">LruCachedBlockQueue</a>(long maxSize, |
| long blockSize)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>maxSize</code> - the target size of elements in the queue</dd> |
| <dd><code>blockSize</code> - expected average size of blocks</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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| <a name="add-org.apache.hadoop.hbase.io.hfile.LruCachedBlock-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>add</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#line.67">add</a>(<a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlock.html" title="class in org.apache.hadoop.hbase.io.hfile">LruCachedBlock</a> cb)</pre> |
| <div class="block">Attempt to add the specified cached block to this queue. |
| |
| <p>If the queue is smaller than the max size, or if the specified element |
| is ordered before the smallest element in the queue, the element will be |
| added to the queue. Otherwise, there is no side effect of this call.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>cb</code> - block to try to add to the queue</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="poll--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>poll</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlock.html" title="class in org.apache.hadoop.hbase.io.hfile">LruCachedBlock</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#line.90">poll</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The next element in this queue, or <code>null</code> if the queue is |
| empty.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="pollLast--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>pollLast</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/hbase/io/hfile/LruCachedBlock.html" title="class in org.apache.hadoop.hbase.io.hfile">LruCachedBlock</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#line.98">pollLast</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The last element in this queue, or <code>null</code> if the queue is |
| empty.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="heapSize--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>heapSize</h4> |
| <pre>public long <a href="../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/LruCachedBlockQueue.html#line.107">heapSize</a>()</pre> |
| <div class="block">Total size of all elements in this queue.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/io/HeapSize.html#heapSize--">heapSize</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/io/HeapSize.html" title="interface in org.apache.hadoop.hbase.io">HeapSize</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>size of all elements currently in queue, in bytes</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
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