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 <div class="subTitle">org.apache.openjpa.instrumentation</div>
 <h2 title="Class AbstractQueryCacheInstrument" class="title">Class AbstractQueryCacheInstrument</h2>
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 <ul class="inheritance">
 <li><a href="../../../../org/apache/openjpa/lib/instrumentation/AbstractInstrument.html" title="class in org.apache.openjpa.lib.instrumentation">org.apache.openjpa.lib.instrumentation.AbstractInstrument</a></li>
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 <ul class="inheritance">
 <li>org.apache.openjpa.instrumentation.AbstractQueryCacheInstrument</li>
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 <dl>
 <dt>All Implemented Interfaces:</dt>
 <dd><a href="../../../../org/apache/openjpa/instrumentation/QueryCacheInstrument.html" title="interface in org.apache.openjpa.instrumentation">QueryCacheInstrument</a>, <a href="../../../../org/apache/openjpa/lib/instrumentation/Instrument.html" title="interface in org.apache.openjpa.lib.instrumentation">Instrument</a></dd>
 </dl>
 <dl>
 <dt>Direct Known Subclasses:</dt>
 <dd><a href="../../../../org/apache/openjpa/instrumentation/jmx/QueryCacheJMXInstrument.html" title="class in org.apache.openjpa.instrumentation.jmx">QueryCacheJMXInstrument</a></dd>
 </dl>
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 <pre>public abstract class <span class="typeNameLabel">AbstractQueryCacheInstrument</span>
 extends <a href="../../../../org/apache/openjpa/lib/instrumentation/AbstractInstrument.html" title="class in org.apache.openjpa.lib.instrumentation">AbstractInstrument</a>
 implements <a href="../../../../org/apache/openjpa/instrumentation/QueryCacheInstrument.html" title="interface in org.apache.openjpa.instrumentation">QueryCacheInstrument</a></pre>
 <div class="block">Provides a basic instrument implementation wrapper for the query cache.  This
  class can be extended to create a provider specific instrument for the
  query cache.</div>
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 </ul>
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 <!-- =========== FIELD SUMMARY =========== -->
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 <h3>Field Summary</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
 <caption><span>Fields</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>
 <tr class="altColor">
 <td class="colFirst"><code>static long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#NO_STATS">NO_STATS</a></span></code>
 <div class="block">Value indicating that cache statistics are not available.</div>
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 <th class="colOne" scope="col">Constructor and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#AbstractQueryCacheInstrument--">AbstractQueryCacheInstrument</a></span>()</code>&nbsp;</td>
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 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#count--">count</a></span>()</code>
 <div class="block">Returns the number of total entries in the cache.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getConfigId--">getConfigId</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getContextRef--">getContextRef</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getEvictionCount--">getEvictionCount</a></span>()</code>
 <div class="block">Returns number of total evictions since last reset</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getExecutionCount--">getExecutionCount</a></span>()</code>
 <div class="block">Returns number of total execution requests since last reset</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getExecutionCount-java.lang.String-">getExecutionCount</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;queryKey)</code>
 <div class="block">Returns number of total execution requests since last reset for
  the specified string-ified query key.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getHitCount--">getHitCount</a></span>()</code>
 <div class="block">Returns number of total read requests that have been found in cache since
  last reset.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getHitCount-java.lang.String-">getHitCount</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;queryKey)</code>
 <div class="block">Returns number of total read requests that have been found in cache since
  last reset for the specified string-ified query key.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/openjpa/lib/instrumentation/InstrumentationLevel.html" title="enum in org.apache.openjpa.lib.instrumentation">InstrumentationLevel</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getLevel--">getLevel</a></span>()</code>
 <div class="block">Gets the instrumentation level of this instrument.</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getTotalEvictionCount--">getTotalEvictionCount</a></span>()</code>
 <div class="block">Returns number of total eviction requests since start.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getTotalExecutionCount--">getTotalExecutionCount</a></span>()</code>
 <div class="block">Returns number of total exec requests since start.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getTotalExecutionCount-java.lang.String-">getTotalExecutionCount</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;queryKey)</code>
 <div class="block">Returns number of total exec requests since start for
  the specified string-ified query key.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getTotalHitCount--">getTotalHitCount</a></span>()</code>
 <div class="block">Returns number of total read requests that has been found since start.</div>
 </td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code>long</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#getTotalHitCount-java.lang.String-">getTotalHitCount</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;queryKey)</code>
 <div class="block">Returns number of total read requests that has been found since start for
  the specified string-ified query key.</div>
 </td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code><a href="http://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#queryKeys--">queryKeys</a></span>()</code>
 <div class="block">Returns all query keys currently tracked in the cache.</div>
 </td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#reset--">reset</a></span>()</code>
 <div class="block">Resets cache statistics</div>
 </td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#setConfigId-java.lang.String-">setConfigId</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;cid)</code>&nbsp;</td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#setContextRef-java.lang.String-">setContextRef</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;cref)</code>&nbsp;</td>
 </tr>
 <tr id="i18" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#setPreparedQueryCache-org.apache.openjpa.datacache.QueryCache-">setPreparedQueryCache</a></span>(<a href="../../../../org/apache/openjpa/datacache/QueryCache.html" title="interface in org.apache.openjpa.datacache">QueryCache</a>&nbsp;qc)</code>&nbsp;</td>
 </tr>
 <tr id="i19" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#setQueryCache-org.apache.openjpa.datacache.QueryCache-">setQueryCache</a></span>(<a href="../../../../org/apache/openjpa/datacache/QueryCache.html" title="interface in org.apache.openjpa.datacache">QueryCache</a>&nbsp;qc)</code>&nbsp;</td>
 </tr>
 <tr id="i20" class="altColor">
 <td class="colFirst"><code><a href="http://docs.oracle.com/javase/8/docs/api/java/util/Date.html?is-external=true" title="class or interface in java.util">Date</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#sinceDate--">sinceDate</a></span>()</code>
 <div class="block">Returns date since cache statistics collection were last reset.</div>
 </td>
 </tr>
 <tr id="i21" class="rowColor">
 <td class="colFirst"><code><a href="http://docs.oracle.com/javase/8/docs/api/java/util/Date.html?is-external=true" title="class or interface in java.util">Date</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/instrumentation/AbstractQueryCacheInstrument.html#startDate--">startDate</a></span>()</code>
 <div class="block">Returns date cache statistics collection started.</div>
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 <code><a href="../../../../org/apache/openjpa/lib/instrumentation/Instrument.html#start--">start</a>, <a href="../../../../org/apache/openjpa/lib/instrumentation/Instrument.html#stop--">stop</a></code></li>
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 <h4>NO_STATS</h4>
 <pre>public static final&nbsp;long NO_STATS</pre>
 <div class="block">Value indicating that cache statistics are not available.</div>
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 <div class="block">Returns number of total execution requests since last reset for
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 <div class="block">Returns number of total exec requests since start for
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 <div class="block">Returns number of total read requests that have been found in cache since
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 <dd><code><a href="../../../../org/apache/openjpa/instrumentation/QueryCacheInstrument.html#queryKeys--">queryKeys</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/openjpa/instrumentation/QueryCacheInstrument.html" title="interface in org.apache.openjpa.instrumentation">QueryCacheInstrument</a></code></dd>
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 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the instrumentation level of the instrument</dd>
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