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8 CloseHook (Solr 4.3.0 API)
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91 org.apache.solr.core</FONT>
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96 <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.solr.core.CloseHook</B>
100 <DT><PRE>public abstract class <B>CloseHook</B><DT>extends <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
104 Used to request notification when the core is closed.
106 Call <A HREF="../../../../org/apache/solr/core/SolrCore.html#addCloseHook(org.apache.solr.core.CloseHook)"><CODE>SolrCore.addCloseHook(org.apache.solr.core.CloseHook)</CODE></A> during the <A HREF="../../../../org/apache/solr/util/plugin/SolrCoreAware.html#inform(org.apache.solr.core.SolrCore)"><CODE>SolrCoreAware.inform(SolrCore)</CODE></A> method to
107 add a close hook to your object.
109 The close hook can be useful for releasing objects related to the request handler (for instance, if you have a JDBC DataSource or something like that)
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126 <TD><CODE><B><A HREF="../../../../org/apache/solr/core/CloseHook.html#CloseHook()">CloseHook</A></B>()</CODE>
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143 <CODE>abstract void</CODE></FONT></TD>
144 <TD><CODE><B><A HREF="../../../../org/apache/solr/core/CloseHook.html#postClose(org.apache.solr.core.SolrCore)">postClose</A></B>(<A HREF="../../../../org/apache/solr/core/SolrCore.html" title="class in org.apache.solr.core">SolrCore</A> core)</CODE>
147 Method called when the given SolrCore object has been shut down and update handlers and searchers are closed
149 Use this method for post-close clean up operations e.g.</TD>
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153 <CODE>abstract void</CODE></FONT></TD>
154 <TD><CODE><B><A HREF="../../../../org/apache/solr/core/CloseHook.html#preClose(org.apache.solr.core.SolrCore)">preClose</A></B>(<A HREF="../../../../org/apache/solr/core/SolrCore.html" title="class in org.apache.solr.core">SolrCore</A> core)</CODE>
157 Method called when the given SolrCore object is closing / shutting down but before the update handler and
158 searcher(s) are actually closed
160 <b>Important:</b> Keep the method implementation as short as possible.</TD>
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185 <A NAME="CloseHook()"><!-- --></A><H3>
188 public <B>CloseHook</B>()</PRE>
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202 <A NAME="preClose(org.apache.solr.core.SolrCore)"><!-- --></A><H3>
205 public abstract void <B>preClose</B>(<A HREF="../../../../org/apache/solr/core/SolrCore.html" title="class in org.apache.solr.core">SolrCore</A> core)</PRE>
207 <DD>Method called when the given SolrCore object is closing / shutting down but before the update handler and
208 searcher(s) are actually closed
210 <b>Important:</b> Keep the method implementation as short as possible. If it were to use any heavy i/o , network connections -
211 it might be a better idea to launch in a separate Thread so as to not to block the process of
212 shutting down a given SolrCore instance.
215 <DT><B>Parameters:</B><DD><CODE>core</CODE> - SolrCore object that is shutting down / closing</DL>
220 <A NAME="postClose(org.apache.solr.core.SolrCore)"><!-- --></A><H3>
223 public abstract void <B>postClose</B>(<A HREF="../../../../org/apache/solr/core/SolrCore.html" title="class in org.apache.solr.core">SolrCore</A> core)</PRE>
225 <DD>Method called when the given SolrCore object has been shut down and update handlers and searchers are closed
227 Use this method for post-close clean up operations e.g. deleting the index from disk.
229 <b>The core's passed to the method is already closed and therefore, it's update handler or searcher should *NOT* be used</b>
231 <b>Important:</b> Keep the method implementation as short as possible. If it were to use any heavy i/o , network connections -
232 it might be a better idea to launch in a separate Thread so as to not to block the process of
233 shutting down a given SolrCore instance.
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