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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.hadoop.hbase.regionserver.wal</a></div> |
| <h1 title="Class SyncFutureCache" class="title">Class SyncFutureCache</h1> |
| </div> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a> |
| <div class="inheritance">org.apache.hadoop.hbase.regionserver.wal.SyncFutureCache</div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <hr> |
| <div class="type-signature"><span class="annotations">@Private |
| </span><span class="modifiers">public final class </span><span class="element-name"><a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line-45">SyncFutureCache</a></span> |
| <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span></div> |
| <div class="block">A cache of <a href="SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal"><code>SyncFuture</code></a>s. This class supports two methods |
| <a href="#getIfPresentOrNew()"><code>getIfPresentOrNew()</code></a> and <a href="#offer(org.apache.hadoop.hbase.regionserver.wal.SyncFuture)"><code>offer(SyncFuture)</code></a>}. |
| <p> |
| Usage pattern: |
| |
| <pre> |
| SyncFuture sf = syncFutureCache.getIfPresentOrNew(); |
| sf.reset(...); |
| // Use the sync future |
| finally: syncFutureCache.offer(sf); |
| </pre> |
| |
| Offering the sync future back to the cache makes it eligible for reuse within the same thread |
| context. Cache keyed by the accessing thread instance and automatically invalidated if it remains |
| unused for <a href="#SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS"><code>SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS</code></a> minutes.</div> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <li> |
| <section class="field-summary" id="field-summary"> |
| <h2>Field Summary</h2> |
| <div class="caption"><span>Fields</span></div> |
| <div class="summary-table three-column-summary"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Field</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>private static final long</code></div> |
| <div class="col-second even-row-color"><code><a href="#SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS" class="member-name-link">SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS</a></code></div> |
| <div class="col-last even-row-color"> </div> |
| <div class="col-first odd-row-color"><code>private final org.apache.hbase.thirdparty.com.google.common.cache.Cache<<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Thread.html" title="class or interface in java.lang" class="external-link">Thread</a>,<wbr><a href="SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a>></code></div> |
| <div class="col-second odd-row-color"><code><a href="#syncFutureCache" class="member-name-link">syncFutureCache</a></code></div> |
| <div class="col-last odd-row-color"> </div> |
| </div> |
| </section> |
| </li> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <li> |
| <section class="constructor-summary" id="constructor-summary"> |
| <h2>Constructor Summary</h2> |
| <div class="caption"><span>Constructors</span></div> |
| <div class="summary-table two-column-summary"> |
| <div class="table-header col-first">Constructor</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E(org.apache.hadoop.conf.Configuration)" class="member-name-link">SyncFutureCache</a><wbr>(org.apache.hadoop.conf.Configuration conf)</code></div> |
| <div class="col-last even-row-color"> </div> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <li> |
| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
| <div id="method-summary-table"> |
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| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#clear()" class="member-name-link">clear</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getIfPresentOrNew()" class="member-name-link">getIfPresentOrNew</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#offer(org.apache.hadoop.hbase.regionserver.wal.SyncFuture)" class="member-name-link">offer</a><wbr>(<a href="SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a> syncFuture)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Offers the sync future back to the cache for reuse.</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3> |
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| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <li> |
| <section class="field-details" id="field-detail"> |
| <h2>Field Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS"> |
| <h3>SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS</h3> |
| <div class="member-signature"><span class="modifiers">private static final</span> <span class="return-type">long</span> <span class="element-name"><a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line-48">SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS</a></span></div> |
| <dl class="notes"> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list"> |
| <li><a href="../../../../../../constant-values.html#org.apache.hadoop.hbase.regionserver.wal.SyncFutureCache.SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS">Constant Field Values</a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="syncFutureCache"> |
| <h3>syncFutureCache</h3> |
| <div class="member-signature"><span class="modifiers">private final</span> <span class="return-type">org.apache.hbase.thirdparty.com.google.common.cache.Cache<<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Thread.html" title="class or interface in java.lang" class="external-link">Thread</a>,<wbr><a href="SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a>></span> <span class="element-name"><a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line-50">syncFutureCache</a></span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li> |
| <section class="constructor-details" id="constructor-detail"> |
| <h2>Constructor Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="<init>(org.apache.hadoop.conf.Configuration)"> |
| <h3>SyncFutureCache</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="element-name"><a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line-52">SyncFutureCache</a></span><wbr><span class="parameters">(org.apache.hadoop.conf.Configuration conf)</span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="getIfPresentOrNew()"> |
| <h3>getIfPresentOrNew</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a></span> <span class="element-name"><a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line-59">getIfPresentOrNew</a></span>()</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="offer(org.apache.hadoop.hbase.regionserver.wal.SyncFuture)"> |
| <h3>offer</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name"><a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line-68">offer</a></span><wbr><span class="parameters">(<a href="SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a> syncFuture)</span></div> |
| <div class="block">Offers the sync future back to the cache for reuse.</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="clear()"> |
| <h3>clear</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name"><a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line-73">clear</a></span>()</div> |
| </section> |
| </li> |
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| </section> |
| </li> |
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