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FinderCache (OpenJPA Parent POM 2.1.1 API) | |
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SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD> | |
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DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD> | |
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org.apache.openjpa.kernel</FONT> | |
<BR> | |
Interface FinderCache<K,V,R></H2> | |
<DL> | |
<DT><B>All Superinterfaces:</B> <DD><A HREF="../../../../org/apache/openjpa/lib/conf/Configurable.html" title="interface in org.apache.openjpa.lib.conf">Configurable</A></DD> | |
</DL> | |
<DL> | |
<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../org/apache/openjpa/jdbc/kernel/FinderCacheImpl.html" title="class in org.apache.openjpa.jdbc.kernel">FinderCacheImpl</A></DD> | |
</DL> | |
<HR> | |
<DL> | |
<DT><PRE>public interface <B>FinderCache<K,V,R></B><DT>extends <A HREF="../../../../org/apache/openjpa/lib/conf/Configurable.html" title="interface in org.apache.openjpa.lib.conf">Configurable</A></DL> | |
</PRE> | |
<P> | |
A cache to create and maintain <A HREF="../../../../org/apache/openjpa/kernel/FinderQuery.html" title="interface in org.apache.openjpa.kernel"><CODE>finder queries</CODE></A>. | |
A finder query is a query to find instance of a given class by its primary | |
identity. This cache maintains finder queries by generic identifier of | |
parameterized type K. | |
A cached query by an identifier of parameterized type K. | |
A query can be cached by an identifier and value represented by parameterized | |
type V. Caching results in creating a new instance of FinderQuery FQ from the | |
value V such that FQ can be executed to return a result of parameterized type | |
R. A request to cache may not be successful if this cache determines the | |
value V to be not cachable. | |
Both get() and put() operations can be controlled by the hints associated | |
with FetchConfiguration. | |
The target database query FQ associated to a cached finder query F | |
<em>may</em> depend upon query execution context such as fetch plan or | |
lock group. This cache, by design, does not monitor the context or | |
automatically invalidate an entry when the original query F is executed | |
with context parameters that affect the target query FQ. | |
The user must notify this receiver to invalidate a cached entry when | |
execution context changes in a way that will modify the resultant database | |
language query FQ. | |
One of the built-in mechanism (available in JPA facade) is to set query hints | |
to either invalidate the query entirely or ignore the cached version for the | |
current execution. | |
<P> | |
<P> | |
<DL> | |
<DT><B>Since:</B></DT> | |
<DD>2.0.0</DD> | |
<DT><B>Author:</B></DT> | |
<DD>Pinaki Poddar</DD> | |
<DT><B>See Also:</B><DD><A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_IGNORE_FINDER"><CODE>QueryHints.HINT_IGNORE_FINDER</CODE></A>, | |
<A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_INVALIDATE_FINDER"><CODE>QueryHints.HINT_INVALIDATE_FINDER</CODE></A>, | |
<A HREF="../../../../org/apache/openjpa/kernel/QueryHints.html#HINT_RECACHE_FINDER"><CODE>This cache allows customization of whether a query can be cached or not | |
via either explicit marking of certain classes as non-cachable (which is | |
irreversible) or addition/removal of exclusion patterns (which is reversible)</CODE></A></DL> | |
<HR> | |
<P> | |
<!-- ========== METHOD SUMMARY =========== --> | |
<A NAME="method_summary"><!-- --></A> | |
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | |
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> | |
<B>Method Summary</B></FONT></TH> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> void</CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html#addExclusionPattern(java.lang.String)">addExclusionPattern</A></B>(<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> pattern)</CODE> | |
<BR> | |
Adds the given pattern to the list of excluded patterns.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../org/apache/openjpa/kernel/FinderQuery.html" title="interface in org.apache.openjpa.kernel">FinderQuery</A><<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">V</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">R</A>></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html#cache(K, V, org.apache.openjpa.kernel.FetchConfiguration)">cache</A></B>(<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A> key, | |
<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">V</A> value, | |
<A HREF="../../../../org/apache/openjpa/kernel/FetchConfiguration.html" title="interface in org.apache.openjpa.kernel">FetchConfiguration</A> fetch)</CODE> | |
<BR> | |
Cache a FinderQuery for the given key and value.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../org/apache/openjpa/kernel/FinderQuery.html" title="interface in org.apache.openjpa.kernel">FinderQuery</A><<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">V</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">R</A>></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html#get(K, org.apache.openjpa.kernel.FetchConfiguration)">get</A></B>(<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A> key, | |
<A HREF="../../../../org/apache/openjpa/kernel/FetchConfiguration.html" title="interface in org.apache.openjpa.kernel">FetchConfiguration</A> fetch)</CODE> | |
<BR> | |
Get the FinderQuery for the given key.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="http://java.sun.com/j2se/6/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</A><<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html#getExcludes()">getExcludes</A></B>()</CODE> | |
<BR> | |
Gets the excluded stringified keys.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="http://java.sun.com/j2se/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A><<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>,<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html#getMapView()">getMapView</A></B>()</CODE> | |
<BR> | |
Get a map view of the cached entries as strings.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../org/apache/openjpa/kernel/QueryStatistics.html" title="interface in org.apache.openjpa.kernel">QueryStatistics</A><<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A>></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html#getStatistics()">getStatistics</A></B>()</CODE> | |
<BR> | |
Gets the simple statistics for executed finder queries.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> boolean</CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html#invalidate(K)">invalidate</A></B>(<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A> key)</CODE> | |
<BR> | |
Remove the FinderQuery for the given key from this cache.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> boolean</CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html#isExcluded(K)">isExcluded</A></B>(<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A> key)</CODE> | |
<BR> | |
Affirms if the given key matches any of the exclusion patterns.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> <A HREF="../../../../org/apache/openjpa/kernel/FinderQuery.html" title="interface in org.apache.openjpa.kernel">FinderQuery</A><<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">V</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">R</A>></CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html#markUncachable(K)">markUncachable</A></B>(<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A> key)</CODE> | |
<BR> | |
Marks the given key as not amenable to caching.</TD> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> | |
<CODE> void</CODE></FONT></TD> | |
<TD><CODE><B><A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html#removeExclusionPattern(java.lang.String)">removeExclusionPattern</A></B>(<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> pattern)</CODE> | |
<BR> | |
Removes the given pattern from the list of excluded patterns.</TD> | |
</TR> | |
</TABLE> | |
<A NAME="methods_inherited_from_class_org.apache.openjpa.lib.conf.Configurable"><!-- --></A> | |
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> | |
<TH ALIGN="left"><B>Methods inherited from interface org.apache.openjpa.lib.conf.<A HREF="../../../../org/apache/openjpa/lib/conf/Configurable.html" title="interface in org.apache.openjpa.lib.conf">Configurable</A></B></TH> | |
</TR> | |
<TR BGCOLOR="white" CLASS="TableRowColor"> | |
<TD><CODE><A HREF="../../../../org/apache/openjpa/lib/conf/Configurable.html#endConfiguration()">endConfiguration</A>, <A HREF="../../../../org/apache/openjpa/lib/conf/Configurable.html#setConfiguration(org.apache.openjpa.lib.conf.Configuration)">setConfiguration</A>, <A HREF="../../../../org/apache/openjpa/lib/conf/Configurable.html#startConfiguration()">startConfiguration</A></CODE></TD> | |
</TR> | |
</TABLE> | |
| |
<P> | |
<!-- ============ METHOD DETAIL ========== --> | |
<A NAME="method_detail"><!-- --></A> | |
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> | |
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> | |
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> | |
<B>Method Detail</B></FONT></TH> | |
</TR> | |
</TABLE> | |
<A NAME="get(java.lang.Object,org.apache.openjpa.kernel.FetchConfiguration)"><!-- --></A><A NAME="get(K, org.apache.openjpa.kernel.FetchConfiguration)"><!-- --></A><H3> | |
get</H3> | |
<PRE> | |
<A HREF="../../../../org/apache/openjpa/kernel/FinderQuery.html" title="interface in org.apache.openjpa.kernel">FinderQuery</A><<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">V</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">R</A>> <B>get</B>(<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A> key, | |
<A HREF="../../../../org/apache/openjpa/kernel/FetchConfiguration.html" title="interface in org.apache.openjpa.kernel">FetchConfiguration</A> fetch)</PRE> | |
<DL> | |
<DD>Get the FinderQuery for the given key. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Parameters:</B><DD><CODE>key</CODE> - for which the finder is looked up<DD><CODE>fecth</CODE> - may contain hints to control lookup operation | |
<DT><B>Returns:</B><DD>FinderQuery for the given mapping.</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="cache(java.lang.Object,java.lang.Object,org.apache.openjpa.kernel.FetchConfiguration)"><!-- --></A><A NAME="cache(K, V, org.apache.openjpa.kernel.FetchConfiguration)"><!-- --></A><H3> | |
cache</H3> | |
<PRE> | |
<A HREF="../../../../org/apache/openjpa/kernel/FinderQuery.html" title="interface in org.apache.openjpa.kernel">FinderQuery</A><<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">V</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">R</A>> <B>cache</B>(<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A> key, | |
<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">V</A> value, | |
<A HREF="../../../../org/apache/openjpa/kernel/FetchConfiguration.html" title="interface in org.apache.openjpa.kernel">FetchConfiguration</A> fetch)</PRE> | |
<DL> | |
<DD>Cache a FinderQuery for the given key and value. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Parameters:</B><DD><CODE>key</CODE> - for which the finder is cached.<DD><CODE>value</CODE> - used to construct the finder query<DD><CODE>fetch</CODE> - may contain hints to control cache operation. | |
<DT><B>Returns:</B><DD>the finder query that has been cached. It may be newly | |
constructed or an existing query. If the given key-value can not be | |
cached, then return null.</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="getMapView()"><!-- --></A><H3> | |
getMapView</H3> | |
<PRE> | |
<A HREF="http://java.sun.com/j2se/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A><<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>,<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>> <B>getMapView</B>()</PRE> | |
<DL> | |
<DD>Get a map view of the cached entries as strings. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="invalidate(java.lang.Object)"><!-- --></A><A NAME="invalidate(K)"><!-- --></A><H3> | |
invalidate</H3> | |
<PRE> | |
boolean <B>invalidate</B>(<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A> key)</PRE> | |
<DL> | |
<DD>Remove the FinderQuery for the given key from this cache. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="markUncachable(java.lang.Object)"><!-- --></A><A NAME="markUncachable(K)"><!-- --></A><H3> | |
markUncachable</H3> | |
<PRE> | |
<A HREF="../../../../org/apache/openjpa/kernel/FinderQuery.html" title="interface in org.apache.openjpa.kernel">FinderQuery</A><<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">V</A>,<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">R</A>> <B>markUncachable</B>(<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A> key)</PRE> | |
<DL> | |
<DD>Marks the given key as not amenable to caching. | |
Explicit marking helps to avoid repeated computational cost of | |
determining whether finder for a key can be cached or not. | |
Explicit marking can not be reversed by removal of exclusion patterns. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
<DT><B>Returns:</B><DD>finder query for the given class if it had been cached before. | |
null otherwise.</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="isExcluded(java.lang.Object)"><!-- --></A><A NAME="isExcluded(K)"><!-- --></A><H3> | |
isExcluded</H3> | |
<PRE> | |
boolean <B>isExcluded</B>(<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A> key)</PRE> | |
<DL> | |
<DD>Affirms if the given key matches any of the exclusion patterns. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="getExcludes()"><!-- --></A><H3> | |
getExcludes</H3> | |
<PRE> | |
<A HREF="http://java.sun.com/j2se/6/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</A><<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>> <B>getExcludes</B>()</PRE> | |
<DL> | |
<DD>Gets the excluded stringified keys. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
</DL> | |
</DD> | |
</DL> | |
<HR> | |
<A NAME="addExclusionPattern(java.lang.String)"><!-- --></A><H3> | |
addExclusionPattern</H3> | |
<PRE> | |
void <B>addExclusionPattern</B>(<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> pattern)</PRE> | |
<DL> | |
<DD>Adds the given pattern to the list of excluded patterns. Any existing | |
cache entry whose key matches the given pattern will be marked | |
non-cachable in a reversible manner. | |
<P> | |
<DD><DL> | |
</DL> | |
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<A NAME="removeExclusionPattern(java.lang.String)"><!-- --></A><H3> | |
removeExclusionPattern</H3> | |
<PRE> | |
void <B>removeExclusionPattern</B>(<A HREF="http://java.sun.com/j2se/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> pattern)</PRE> | |
<DL> | |
<DD>Removes the given pattern from the list of excluded patterns. | |
Any excluded entry that matches the given pattern can now be cached | |
again, unless it has been marked non-cachable explicitly. | |
<P> | |
<DD><DL> | |
</DL> | |
</DD> | |
<DD><DL> | |
</DL> | |
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<A NAME="getStatistics()"><!-- --></A><H3> | |
getStatistics</H3> | |
<PRE> | |
<A HREF="../../../../org/apache/openjpa/kernel/QueryStatistics.html" title="interface in org.apache.openjpa.kernel">QueryStatistics</A><<A HREF="../../../../org/apache/openjpa/kernel/FinderCache.html" title="type parameter in FinderCache">K</A>> <B>getStatistics</B>()</PRE> | |
<DL> | |
<DD>Gets the simple statistics for executed finder queries. | |
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