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| FinderCache (OpenJPA Parent POM 2.0.0 API) |
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| SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">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/1.5.0/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/1.5.0/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/1.5.0/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/1.5.0/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/1.5.0/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/1.5.0/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/1.5.0/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/1.5.0/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/1.5.0/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/1.5.0/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/1.5.0/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/1.5.0/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/1.5.0/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> |
| </DD> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="removeExclusionPattern(java.lang.String)"><!-- --></A><H3> |
| removeExclusionPattern</H3> |
| <PRE> |
| void <B>removeExclusionPattern</B>(<A HREF="http://java.sun.com/j2se/1.5.0/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> |
| </DD> |
| </DL> |
| <HR> |
| |
| <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. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
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