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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.openjpa.kernel</a></div>
<h2 title="Interface QueryStatistics" class="title">Interface QueryStatistics&lt;T&gt;</h2>
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<dt>All Superinterfaces:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Serializable.html?is-external=true" title="class or interface in java.io" class="externalLink">Serializable</a></code></dd>
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<dt>All Known Implementing Classes:</dt>
<dd><code><a href="../datacache/AbstractQueryCache.Default.html" title="class in org.apache.openjpa.datacache">AbstractQueryCache.Default</a></code>, <code><a href="QueryStatistics.Default.html" title="class in org.apache.openjpa.kernel">QueryStatistics.Default</a></code>, <code><a href="QueryStatistics.None.html" title="class in org.apache.openjpa.kernel">QueryStatistics.None</a></code></dd>
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<pre>public interface <span class="typeNameLabel">QueryStatistics&lt;T&gt;</span>
extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Serializable.html?is-external=true" title="class or interface in java.io" class="externalLink">Serializable</a></pre>
<div class="block">Records query execution statistics.
Statistics can be reset.
Gathers both accumulated statistics since start as well as statistics since
last reset.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.3.0</dd>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Pinaki Poddar</dd>
</dl>
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<caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="QueryStatistics.Default.html" title="class in org.apache.openjpa.kernel">QueryStatistics.Default</a>&lt;<a href="QueryStatistics.Default.html" title="type parameter in QueryStatistics.Default">T</a>&gt;</span></code></th>
<td class="colLast">
<div class="block">A default implementation.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="QueryStatistics.None.html" title="class in org.apache.openjpa.kernel">QueryStatistics.None</a>&lt;<a href="QueryStatistics.None.html" title="type parameter in QueryStatistics.None">T</a>&gt;</span></code></th>
<td class="colLast">
<div class="block">A do-nothing implementation.</div>
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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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colSecond" scope="col">Method</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#clear()">clear</a></span>()</code></th>
<td class="colLast">
<div class="block">Clears all statistics accumulated since start.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#dump(java.io.PrintStream)">dump</a></span>&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/PrintStream.html?is-external=true" title="class or interface in java.io" class="externalLink">PrintStream</a>&nbsp;out)</code></th>
<td class="colLast">
<div class="block">Dumps on the given output stream.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getEvictionCount()">getEvictionCount</a></span>()</code></th>
<td class="colLast">
<div class="block">Gets number of total query evictions since last reset.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getExecutionCount()">getExecutionCount</a></span>()</code></th>
<td class="colLast">
<div class="block">Gets number of total query execution since last reset.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getExecutionCount(T)">getExecutionCount</a></span>&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</code></th>
<td class="colLast">
<div class="block">Gets number of executions for the given query since last reset.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getHitCount()">getHitCount</a></span>()</code></th>
<td class="colLast">
<div class="block">Gets number of total query execution that are cached since last reset.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getHitCount(T)">getHitCount</a></span>&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</code></th>
<td class="colLast">
<div class="block">Gets number of executions for the given query that are cached since
last reset.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTotalEvictionCount()">getTotalEvictionCount</a></span>()</code></th>
<td class="colLast">
<div class="block">Gets number of total query evictions since start.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTotalExecutionCount()">getTotalExecutionCount</a></span>()</code></th>
<td class="colLast">
<div class="block">Gets number of total query execution since start.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTotalExecutionCount(T)">getTotalExecutionCount</a></span>&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</code></th>
<td class="colLast">
<div class="block">Gets number of executions for the given query since start.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTotalHitCount()">getTotalHitCount</a></span>()</code></th>
<td class="colLast">
<div class="block">Gets number of total query execution that are cached since start.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTotalHitCount(T)">getTotalHitCount</a></span>&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</code></th>
<td class="colLast">
<div class="block">Gets number of executions for the given query that are cached since
start.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a>&lt;<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#keys()">keys</a></span>()</code></th>
<td class="colLast">
<div class="block">Gets all the identifier keys for the cached queries.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#recordEviction(T)">recordEviction</a></span>&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</code></th>
<td class="colLast">
<div class="block">Record that the given query has been evicted.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#recordExecution(T)">recordExecution</a></span>&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</code></th>
<td class="colLast">
<div class="block">Record that the given query has been executed.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reset()">reset</a></span>()</code></th>
<td class="colLast">
<div class="block">Clears all statistics accumulated since last reset.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Date.html?is-external=true" title="class or interface in java.util" class="externalLink">Date</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#since()">since</a></span>()</code></th>
<td class="colLast">
<div class="block">Gets the time of last reset.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Date.html?is-external=true" title="class or interface in java.util" class="externalLink">Date</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#start()">start</a></span>()</code></th>
<td class="colLast">
<div class="block">Gets the time of start.</div>
</td>
</tr>
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<h4>keys</h4>
<pre class="methodSignature"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Set.html?is-external=true" title="class or interface in java.util" class="externalLink">Set</a>&lt;<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&gt;&nbsp;keys()</pre>
<div class="block">Gets all the identifier keys for the cached queries.</div>
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<a id="recordExecution(java.lang.Object)">
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<h4>recordExecution</h4>
<pre class="methodSignature">void&nbsp;recordExecution&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</pre>
<div class="block">Record that the given query has been executed.</div>
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<h4>recordEviction</h4>
<pre class="methodSignature">void&nbsp;recordEviction&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</pre>
<div class="block">Record that the given query has been evicted.</div>
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<h4>getExecutionCount</h4>
<pre class="methodSignature">long&nbsp;getExecutionCount()</pre>
<div class="block">Gets number of total query execution since last reset.</div>
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<pre class="methodSignature">long&nbsp;getTotalExecutionCount()</pre>
<div class="block">Gets number of total query execution since start.</div>
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<a id="getExecutionCount(java.lang.Object)">
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<h4>getExecutionCount</h4>
<pre class="methodSignature">long&nbsp;getExecutionCount&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</pre>
<div class="block">Gets number of executions for the given query since last reset.</div>
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<a id="getTotalExecutionCount(java.lang.Object)">
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<h4>getTotalExecutionCount</h4>
<pre class="methodSignature">long&nbsp;getTotalExecutionCount&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</pre>
<div class="block">Gets number of executions for the given query since start.</div>
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<h4>getHitCount</h4>
<pre class="methodSignature">long&nbsp;getHitCount()</pre>
<div class="block">Gets number of total query execution that are cached since last reset.</div>
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<h4>getTotalHitCount</h4>
<pre class="methodSignature">long&nbsp;getTotalHitCount()</pre>
<div class="block">Gets number of total query execution that are cached since start.</div>
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<a id="getHitCount(java.lang.Object)">
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</a><a id="getHitCount(T)">
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<h4>getHitCount</h4>
<pre class="methodSignature">long&nbsp;getHitCount&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</pre>
<div class="block">Gets number of executions for the given query that are cached since
last reset.</div>
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<a id="getTotalHitCount(java.lang.Object)">
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<h4>getTotalHitCount</h4>
<pre class="methodSignature">long&nbsp;getTotalHitCount&#8203;(<a href="QueryStatistics.html" title="type parameter in QueryStatistics">T</a>&nbsp;query)</pre>
<div class="block">Gets number of executions for the given query that are cached since
start.</div>
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<h4>getEvictionCount</h4>
<pre class="methodSignature">long&nbsp;getEvictionCount()</pre>
<div class="block">Gets number of total query evictions since last reset.</div>
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<h4>getTotalEvictionCount</h4>
<pre class="methodSignature">long&nbsp;getTotalEvictionCount()</pre>
<div class="block">Gets number of total query evictions since start.</div>
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<a id="since()">
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<h4>since</h4>
<pre class="methodSignature"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Date.html?is-external=true" title="class or interface in java.util" class="externalLink">Date</a>&nbsp;since()</pre>
<div class="block">Gets the time of last reset.</div>
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<h4>start</h4>
<pre class="methodSignature"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Date.html?is-external=true" title="class or interface in java.util" class="externalLink">Date</a>&nbsp;start()</pre>
<div class="block">Gets the time of start.</div>
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<h4>reset</h4>
<pre class="methodSignature">void&nbsp;reset()</pre>
<div class="block">Clears all statistics accumulated since last reset.</div>
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<h4>clear</h4>
<pre class="methodSignature">void&nbsp;clear()</pre>
<div class="block">Clears all statistics accumulated since start.</div>
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<h4>dump</h4>
<pre class="methodSignature">void&nbsp;dump&#8203;(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/PrintStream.html?is-external=true" title="class or interface in java.io" class="externalLink">PrintStream</a>&nbsp;out)</pre>
<div class="block">Dumps on the given output stream.</div>
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