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| <div class="subTitle">org.apache.openjpa.datacache</div> |
| <h2 title="Interface QueryCache" class="title">Interface QueryCache</h2> |
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| <dl> |
| <dt>All Superinterfaces:</dt> |
| <dd><a href="../../../../org/apache/openjpa/lib/util/Closeable.html" title="interface in org.apache.openjpa.lib.util">Closeable</a>, <a href="../../../../org/apache/openjpa/datacache/TypesChangedListener.html" title="interface in org.apache.openjpa.datacache">TypesChangedListener</a></dd> |
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| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../../org/apache/openjpa/datacache/AbstractQueryCache.html" title="class in org.apache.openjpa.datacache">AbstractQueryCache</a>, <a href="../../../../org/apache/openjpa/datacache/ConcurrentQueryCache.html" title="class in org.apache.openjpa.datacache">ConcurrentQueryCache</a>, <a href="../../../../org/apache/openjpa/datacache/DelegatingQueryCache.html" title="class in org.apache.openjpa.datacache">DelegatingQueryCache</a></dd> |
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| <pre>public interface <span class="typeNameLabel">QueryCache</span> |
| extends <a href="../../../../org/apache/openjpa/datacache/TypesChangedListener.html" title="interface in org.apache.openjpa.datacache">TypesChangedListener</a>, <a href="../../../../org/apache/openjpa/lib/util/Closeable.html" title="interface in org.apache.openjpa.lib.util">Closeable</a></pre> |
| <div class="block">Interface that must be implemented by any level 2 query cache |
| used by OpenJPA. These methods should be threadsafe. |
| Most query cache implementations will probably implement |
| <a href="../../../../org/apache/openjpa/lib/conf/Configurable.html" title="interface in org.apache.openjpa.lib.conf"><code>Configurable</code></a> to receive a handle to the |
| system configuration on construction.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>0.2.5</dd> |
| <dt><span class="simpleTagLabel">Author:</span></dt> |
| <dd>Patrick Linskey</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
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| <th class="colLast" scope="col">Method and Description</th> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#addTypesChangedListener-org.apache.openjpa.datacache.TypesChangedListener-">addTypesChangedListener</a></span>(<a href="../../../../org/apache/openjpa/datacache/TypesChangedListener.html" title="interface in org.apache.openjpa.datacache">TypesChangedListener</a> listen)</code> |
| <div class="block">Add a new types event listener to this cache.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#clear--">clear</a></span>()</code> |
| <div class="block">Remove all data from this cache.</div> |
| </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/openjpa/datacache/QueryCache.html#close--">close</a></span>()</code> |
| <div class="block">Free the resources used by this cache.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/openjpa/datacache/QueryResult.html" title="class in org.apache.openjpa.datacache">QueryResult</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#get-org.apache.openjpa.datacache.QueryKey-">get</a></span>(<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a> qk)</code> |
| <div class="block">Return a list of oids for the given query key.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/openjpa/kernel/QueryStatistics.html" title="interface in org.apache.openjpa.kernel">QueryStatistics</a><<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#getStatistics--">getStatistics</a></span>()</code> |
| <div class="block">Gets the simple statistics for query results.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#initialize-org.apache.openjpa.datacache.DataCacheManager-">initialize</a></span>(<a href="../../../../org/apache/openjpa/datacache/DataCacheManager.html" title="interface in org.apache.openjpa.datacache">DataCacheManager</a> manager)</code> |
| <div class="block">Initialize any resources associated with the given |
| <a href="../../../../org/apache/openjpa/datacache/DataCacheManager.html" title="interface in org.apache.openjpa.datacache"><code>DataCacheManager</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#pin-org.apache.openjpa.datacache.QueryKey-">pin</a></span>(<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a> qk)</code> |
| <div class="block">Pin the value stored under <code>qk</code> into the |
| cache.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/openjpa/datacache/QueryResult.html" title="class in org.apache.openjpa.datacache">QueryResult</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#put-org.apache.openjpa.datacache.QueryKey-org.apache.openjpa.datacache.QueryResult-">put</a></span>(<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a> qk, |
| <a href="../../../../org/apache/openjpa/datacache/QueryResult.html" title="class in org.apache.openjpa.datacache">QueryResult</a> oids)</code> |
| <div class="block">Set the list of OIDs for the given query key.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/openjpa/datacache/QueryResult.html" title="class in org.apache.openjpa.datacache">QueryResult</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#remove-org.apache.openjpa.datacache.QueryKey-">remove</a></span>(<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a> qk)</code> |
| <div class="block">Remove the value stored under the given query key.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#removeTypesChangedListener-org.apache.openjpa.datacache.TypesChangedListener-">removeTypesChangedListener</a></span>(<a href="../../../../org/apache/openjpa/datacache/TypesChangedListener.html" title="interface in org.apache.openjpa.datacache">TypesChangedListener</a> listen)</code> |
| <div class="block">Remove an types event listener from this cache.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#unpin-org.apache.openjpa.datacache.QueryKey-">unpin</a></span>(<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a> qk)</code> |
| <div class="block">Unpin the value stored under <code>key</code> into the cache.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#writeLock--">writeLock</a></span>()</code> |
| <div class="block">Obtain a write lock on the cache.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/openjpa/datacache/QueryCache.html#writeUnlock--">writeUnlock</a></span>()</code> |
| <div class="block">Release the write lock on the cache.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.org.apache.openjpa.datacache.TypesChangedListener"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from interface org.apache.openjpa.datacache.<a href="../../../../org/apache/openjpa/datacache/TypesChangedListener.html" title="interface in org.apache.openjpa.datacache">TypesChangedListener</a></h3> |
| <code><a href="../../../../org/apache/openjpa/datacache/TypesChangedListener.html#onTypesChanged-org.apache.openjpa.datacache.TypesChangedEvent-">onTypesChanged</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
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| <!-- ============ METHOD DETAIL ========== --> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="initialize-org.apache.openjpa.datacache.DataCacheManager-"> |
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| <ul class="blockList"> |
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| <h4>initialize</h4> |
| <pre>void initialize(<a href="../../../../org/apache/openjpa/datacache/DataCacheManager.html" title="interface in org.apache.openjpa.datacache">DataCacheManager</a> manager)</pre> |
| <div class="block">Initialize any resources associated with the given |
| <a href="../../../../org/apache/openjpa/datacache/DataCacheManager.html" title="interface in org.apache.openjpa.datacache"><code>DataCacheManager</code></a>.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>0.4.1</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="get-org.apache.openjpa.datacache.QueryKey-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>get</h4> |
| <pre><a href="../../../../org/apache/openjpa/datacache/QueryResult.html" title="class in org.apache.openjpa.datacache">QueryResult</a> get(<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a> qk)</pre> |
| <div class="block">Return a list of oids for the given query key. This is an |
| unmodifiable list.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The query results matching the given key, or null if none</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="put-org.apache.openjpa.datacache.QueryKey-org.apache.openjpa.datacache.QueryResult-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>put</h4> |
| <pre><a href="../../../../org/apache/openjpa/datacache/QueryResult.html" title="class in org.apache.openjpa.datacache">QueryResult</a> put(<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a> qk, |
| <a href="../../../../org/apache/openjpa/datacache/QueryResult.html" title="class in org.apache.openjpa.datacache">QueryResult</a> oids)</pre> |
| <div class="block">Set the list of OIDs for the given query key. A reference |
| to the given list will be stored in the query cache, so the |
| list should not be modified after invoking this method.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The previously cached value, or <code>null</code> if |
| the key was not previously cached. See <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#put-K-V-" title="class or interface in java.util"><code>Map.put(K, V)</code></a> |
| for more information.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="remove-org.apache.openjpa.datacache.QueryKey-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>remove</h4> |
| <pre><a href="../../../../org/apache/openjpa/datacache/QueryResult.html" title="class in org.apache.openjpa.datacache">QueryResult</a> remove(<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a> qk)</pre> |
| <div class="block">Remove the value stored under the given query key. |
| This method is typically not invoked directly from outside |
| the <code>QueryCache</code> class. Instead, the cache should |
| be updated by implementing <a href="../../../../org/apache/openjpa/event/RemoteCommitListener.html" title="interface in org.apache.openjpa.event"><code>RemoteCommitListener</code></a>, |
| which will result in all queries that may be invalid being dropped.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The previously cached value, or <code>null</code> if |
| the key was not previously cached. See <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#remove-java.lang.Object-" title="class or interface in java.util"><code>Map.remove(java.lang.Object)</code></a> |
| for more information.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="clear--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>clear</h4> |
| <pre>void clear()</pre> |
| <div class="block">Remove all data from this cache.</div> |
| </li> |
| </ul> |
| <a name="pin-org.apache.openjpa.datacache.QueryKey-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>pin</h4> |
| <pre>boolean pin(<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a> qk)</pre> |
| <div class="block">Pin the value stored under <code>qk</code> into the |
| cache. This method guarantees that <code>qk</code>'s value |
| will not be expired if the cache exceeds its capacity. It |
| causes this data to be ignored when determining whether or not |
| the cache is full, effectively increasing the total amount of |
| data stored in the cache. This method does not affect the |
| behavior of <a href="../../../../org/apache/openjpa/datacache/QueryCache.html#remove-org.apache.openjpa.datacache.QueryKey-"><code>remove(org.apache.openjpa.datacache.QueryKey)</code></a> or <a href="../../../../org/apache/openjpa/datacache/TypesChangedListener.html#onTypesChanged-org.apache.openjpa.datacache.TypesChangedEvent-"><code>TypesChangedListener.onTypesChanged(org.apache.openjpa.datacache.TypesChangedEvent)</code></a>.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code> if <code>key</code>'s value was |
| pinned into the cache; <code>false</code> if the key is not in the cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="unpin-org.apache.openjpa.datacache.QueryKey-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>unpin</h4> |
| <pre>boolean unpin(<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a> qk)</pre> |
| <div class="block">Unpin the value stored under <code>key</code> into the cache. |
| This method reverses a previous invocation of <a href="../../../../org/apache/openjpa/datacache/QueryCache.html#pin-org.apache.openjpa.datacache.QueryKey-"><code>pin(org.apache.openjpa.datacache.QueryKey)</code></a>. |
| This method does not remove anything from the cache; it merely |
| makes <code>key</code>'s value a candidate for flushing from the cache.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code> if <code>key</code>'s value was |
| unpinned from the cache; <code>false</code> if the |
| key is not in the cache.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="writeLock--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>writeLock</h4> |
| <pre>void writeLock()</pre> |
| <div class="block">Obtain a write lock on the cache.</div> |
| </li> |
| </ul> |
| <a name="writeUnlock--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>writeUnlock</h4> |
| <pre>void writeUnlock()</pre> |
| <div class="block">Release the write lock on the cache.</div> |
| </li> |
| </ul> |
| <a name="addTypesChangedListener-org.apache.openjpa.datacache.TypesChangedListener-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>addTypesChangedListener</h4> |
| <pre>void addTypesChangedListener(<a href="../../../../org/apache/openjpa/datacache/TypesChangedListener.html" title="interface in org.apache.openjpa.datacache">TypesChangedListener</a> listen)</pre> |
| <div class="block">Add a new types event listener to this cache.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>0.3.3</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="removeTypesChangedListener-org.apache.openjpa.datacache.TypesChangedListener-"> |
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| </a> |
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| <h4>removeTypesChangedListener</h4> |
| <pre>boolean removeTypesChangedListener(<a href="../../../../org/apache/openjpa/datacache/TypesChangedListener.html" title="interface in org.apache.openjpa.datacache">TypesChangedListener</a> listen)</pre> |
| <div class="block">Remove an types event listener from this cache.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>0.3.3</dd> |
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| <h4>close</h4> |
| <pre>void close()</pre> |
| <div class="block">Free the resources used by this cache.</div> |
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| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/apache/openjpa/lib/util/Closeable.html#close--">close</a></code> in interface <code><a href="../../../../org/apache/openjpa/lib/util/Closeable.html" title="interface in org.apache.openjpa.lib.util">Closeable</a></code></dd> |
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| <h4>getStatistics</h4> |
| <pre><a href="../../../../org/apache/openjpa/kernel/QueryStatistics.html" title="interface in org.apache.openjpa.kernel">QueryStatistics</a><<a href="../../../../org/apache/openjpa/datacache/QueryKey.html" title="class in org.apache.openjpa.datacache">QueryKey</a>> getStatistics()</pre> |
| <div class="block">Gets the simple statistics for query results. |
| If the statistics gathering is disabled, an empty statistics is returned.</div> |
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| <dd>2.1.0</dd> |
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