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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.cayenne.cache</a></div>
<h2 title="Class NestedQueryCache" class="title">Class NestedQueryCache</h2>
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<ul class="inheritance">
<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">java.lang.Object</a></li>
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<li>org.apache.cayenne.cache.NestedQueryCache</li>
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<dt>All Implemented Interfaces:</dt>
<dd><code><a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></code></dd>
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<pre>public class <span class="typeNameLabel">NestedQueryCache</span>
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" class="externalLink">Object</a>
implements <a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></pre>
<div class="block">A <a href="QueryCache.html" title="interface in org.apache.cayenne.cache"><code>QueryCache</code></a> wrapper that introduces a key namespace on top of a
delegate shared cache. This way multiple cache users can share the same
underlying cache without a possibility of key conflicts, yet refresh the
cache groups in a coordinated fashion.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>3.0</dd>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Field</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#delegate">delegate</a></span></code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#namespace">namespace</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.cayenne.cache.QueryCache)">NestedQueryCache</a></span>&#8203;(<a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a>&nbsp;delegate)</code></th>
<td class="colLast">&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><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<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"><span class="deprecatedLabel">Deprecated.</span>
<div class="deprecationComment">since 4.0</div>
</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(org.apache.cayenne.query.QueryMetadata)">get</a></span>&#8203;(<a href="../query/QueryMetadata.html" title="interface in org.apache.cayenne.query">QueryMetadata</a>&nbsp;metadata)</code></th>
<td class="colLast">
<div class="block">Returns a cached query result for the given QueryMetadata or null if the result is
not cached or is expired.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(org.apache.cayenne.query.QueryMetadata,org.apache.cayenne.cache.QueryCacheEntryFactory)">get</a></span>&#8203;(<a href="../query/QueryMetadata.html" title="interface in org.apache.cayenne.query">QueryMetadata</a>&nbsp;metadata,
<a href="QueryCacheEntryFactory.html" title="interface in org.apache.cayenne.cache">QueryCacheEntryFactory</a>&nbsp;factory)</code></th>
<td class="colLast">
<div class="block">Returns a cached query result for the given QueryMetadata.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDelegate()">getDelegate</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the actual implementation of the query cache that is wrapped by
this NestedQueryCache.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#put(org.apache.cayenne.query.QueryMetadata,java.util.List)">put</a></span>&#8203;(<a href="../query/QueryMetadata.html" title="interface in org.apache.cayenne.query">QueryMetadata</a>&nbsp;metadata,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a>&nbsp;results)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#remove(java.lang.String)">remove</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key)</code></th>
<td class="colLast">
<div class="block">Removes an entry for key in the current namespace.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeGroup(java.lang.String)">removeGroup</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;groupKey)</code></th>
<td class="colLast">
<div class="block">Invalidates a shared cache group.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeGroup(java.lang.String,java.lang.Class,java.lang.Class)">removeGroup</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;groupKey,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;?&gt;&nbsp;keyType,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;?&gt;&nbsp;valueType)</code></th>
<td class="colLast">
<div class="block">Removes a group of entries identified by group key.</div>
</td>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></h3>
<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" class="externalLink">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" class="externalLink">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" class="externalLink">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" class="externalLink">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" class="externalLink">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" class="externalLink">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" class="externalLink">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" class="externalLink">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" class="externalLink">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" class="externalLink">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" class="externalLink">wait</a></code></li>
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<h4>delegate</h4>
<pre>protected&nbsp;<a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a> delegate</pre>
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<h4>namespace</h4>
<pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> namespace</pre>
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<h3>Constructor Detail</h3>
<a id="&lt;init&gt;(org.apache.cayenne.cache.QueryCache)">
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<h4>NestedQueryCache</h4>
<pre>public&nbsp;NestedQueryCache&#8203;(<a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a>&nbsp;delegate)</pre>
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<h4>getDelegate</h4>
<pre class="methodSignature">public&nbsp;<a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a>&nbsp;getDelegate()</pre>
<div class="block">Returns the actual implementation of the query cache that is wrapped by
this NestedQueryCache.</div>
</li>
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<a id="clear()">
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<h4>clear</h4>
<pre class="methodSignature"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang" class="externalLink">@Deprecated</a>
public&nbsp;void&nbsp;clear()</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span>
<div class="deprecationComment">since 4.0</div>
</div>
<div class="block">Clears the underlying shared cache.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="QueryCache.html#clear()">clear</a></code>&nbsp;in interface&nbsp;<code><a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="QueryCache.html#clear()"><code>QueryCache.clear()</code></a></dd>
</dl>
</li>
</ul>
<a id="get(org.apache.cayenne.query.QueryMetadata,org.apache.cayenne.cache.QueryCacheEntryFactory)">
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<h4>get</h4>
<pre class="methodSignature">public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a>&nbsp;get&#8203;(<a href="../query/QueryMetadata.html" title="interface in org.apache.cayenne.query">QueryMetadata</a>&nbsp;metadata,
<a href="QueryCacheEntryFactory.html" title="interface in org.apache.cayenne.cache">QueryCacheEntryFactory</a>&nbsp;factory)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="QueryCache.html#get(org.apache.cayenne.query.QueryMetadata,org.apache.cayenne.cache.QueryCacheEntryFactory)">QueryCache</a></code></span></div>
<div class="block">Returns a cached query result for the given QueryMetadata. If the result is not
cached or is expired, cache will use provided factory to rebuild the value and
store it in the cache. A corollary is that this method never returns null.
<p>
Compared to <a href="QueryCache.html#get(org.apache.cayenne.query.QueryMetadata)"><code>QueryCache.get(QueryMetadata)</code></a>, this method allows the cache to do
appropriate synchronization when refreshing the entry, preventing multiple threads
from running the same query when a missing entry is requested by multiple threads
simultaneously.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="QueryCache.html#get(org.apache.cayenne.query.QueryMetadata,org.apache.cayenne.cache.QueryCacheEntryFactory)">get</a></code>&nbsp;in interface&nbsp;<code><a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></code></dd>
</dl>
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<a id="get(org.apache.cayenne.query.QueryMetadata)">
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<h4>get</h4>
<pre class="methodSignature">public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a>&nbsp;get&#8203;(<a href="../query/QueryMetadata.html" title="interface in org.apache.cayenne.query">QueryMetadata</a>&nbsp;metadata)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="QueryCache.html#get(org.apache.cayenne.query.QueryMetadata)">QueryCache</a></code></span></div>
<div class="block">Returns a cached query result for the given QueryMetadata or null if the result is
not cached or is expired.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="QueryCache.html#get(org.apache.cayenne.query.QueryMetadata)">get</a></code>&nbsp;in interface&nbsp;<code><a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></code></dd>
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<a id="put(org.apache.cayenne.query.QueryMetadata,java.util.List)">
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<h4>put</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;put&#8203;(<a href="../query/QueryMetadata.html" title="interface in org.apache.cayenne.query">QueryMetadata</a>&nbsp;metadata,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a>&nbsp;results)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="QueryCache.html#put(org.apache.cayenne.query.QueryMetadata,java.util.List)">put</a></code>&nbsp;in interface&nbsp;<code><a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></code></dd>
</dl>
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<a id="remove(java.lang.String)">
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<h4>remove</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;remove&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;key)</pre>
<div class="block">Removes an entry for key in the current namespace.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="QueryCache.html#remove(java.lang.String)">remove</a></code>&nbsp;in interface&nbsp;<code><a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></code></dd>
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<h4>removeGroup</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;removeGroup&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;groupKey)</pre>
<div class="block">Invalidates a shared cache group.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="QueryCache.html#removeGroup(java.lang.String)">removeGroup</a></code>&nbsp;in interface&nbsp;<code><a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></code></dd>
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<h4>removeGroup</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;removeGroup&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;groupKey,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;?&gt;&nbsp;keyType,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;?&gt;&nbsp;valueType)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="QueryCache.html#removeGroup(java.lang.String,java.lang.Class,java.lang.Class)">QueryCache</a></code></span></div>
<div class="block">Removes a group of entries identified by group key.
Can be used if cache provider supports strictly typed caches.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="QueryCache.html#removeGroup(java.lang.String,java.lang.Class,java.lang.Class)">removeGroup</a></code>&nbsp;in interface&nbsp;<code><a href="QueryCache.html" title="interface in org.apache.cayenne.cache">QueryCache</a></code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="QueryCache.html#removeGroup(java.lang.String)"><code>QueryCache.removeGroup(String)</code></a></dd>
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