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| <div class="subTitle">org.apache.hadoop.hbase.regionserver.wal</div> |
| <h2 title="Class SyncFutureCache" class="title">Class SyncFutureCache</h2> |
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| <li>org.apache.hadoop.hbase.regionserver.wal.SyncFutureCache</li> |
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| <pre>@InterfaceAudience.Private |
| public final class <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line.42">SyncFutureCache</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">A cache of <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal"><code>SyncFuture</code></a>s. This class supports two methods |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#getIfPresentOrNew--"><code>getIfPresentOrNew()</code></a> and <code>SyncFutureCache#offer()</code>. |
| |
| Usage pattern: |
| SyncFuture sf = syncFutureCache.getIfPresentOrNew(); |
| sf.reset(...); |
| // Use the sync future |
| finally: syncFutureCache.offer(sf); |
| |
| 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="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS"><code>SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS</code></a> minutes.</div> |
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| <td class="colFirst"><code>private static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS">SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private org.apache.hbase.thirdparty.com.google.common.cache.Cache<<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true" title="class or interface in java.lang">Thread</a>,<a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#syncFutureCache">syncFutureCache</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#SyncFutureCache-org.apache.hadoop.conf.Configuration-">SyncFutureCache</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </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/regionserver/wal/SyncFutureCache.html#clear--">clear</a></span>()</code> </td> |
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| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#getIfPresentOrNew--">getIfPresentOrNew</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#offer-org.apache.hadoop.hbase.regionserver.wal.SyncFuture-">offer</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a> syncFuture)</code> |
| <div class="block">Offers the sync future back to the cache for reuse.</div> |
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| <!-- ============ FIELD DETAIL =========== --> |
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| <h3>Field Detail</h3> |
| <a name="SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS</h4> |
| <pre>private static final long <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line.44">SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS</a></pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../constant-values.html#org.apache.hadoop.hbase.regionserver.wal.SyncFutureCache.SYNC_FUTURE_INVALIDATION_TIMEOUT_MINS">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="syncFutureCache"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>syncFutureCache</h4> |
| <pre>private final org.apache.hbase.thirdparty.com.google.common.cache.Cache<<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true" title="class or interface in java.lang">Thread</a>,<a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line.46">syncFutureCache</a></pre> |
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| <a name="SyncFutureCache-org.apache.hadoop.conf.Configuration-"> |
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| <h4>SyncFutureCache</h4> |
| <pre>public <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line.48">SyncFutureCache</a>(org.apache.hadoop.conf.Configuration conf)</pre> |
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| <h4>getIfPresentOrNew</h4> |
| <pre>public <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line.55">getIfPresentOrNew</a>()</pre> |
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| <h4>offer</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line.64">offer</a>(<a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a> syncFuture)</pre> |
| <div class="block">Offers the sync future back to the cache for reuse.</div> |
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| <h4>clear</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/SyncFutureCache.html#line.69">clear</a>()</pre> |
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