cloudstack/thirdparty/ehcache/docs/net/sf/ehcache/exceptionhandler/CacheExceptionHandler.html

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CacheExceptionHandler (ehcache)
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net.sf.ehcache.exceptionhandler</FONT>
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Interface CacheExceptionHandler</H2>
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<DT><PRE>public interface <B>CacheExceptionHandler</B></DL>
</PRE>
<P>
A handler which may be registered with an Ehcache, to handle exceptions on Cache operations.
<p/>
Handlers may be registered at configuration time in ehcache.xml, using a CacheExceptionHandlerFactory, or
set at runtime (a strategy).
<p/>
If an exception handler is registered, the default behaviour of throwing the exception will not occur. The handler
method <code>onException</code> will be called. Of course, if the handler decides to throw the exception, it will
propagate up through the call stack. If the handler does not, it won't.
<p/>
Some common Exceptions thrown, and which therefore should be considered when implementing this class are listed below:
<ul>
<li><CODE>IllegalStateException</CODE> if the cache is not <A HREF="../../../../net/sf/ehcache/Status.html#STATUS_ALIVE"><CODE>Status.STATUS_ALIVE</CODE></A>
<li><CODE>IllegalArgumentException</CODE> if an attempt is made to put a null element into a cache
<li><A HREF="../../../../net/sf/ehcache/distribution/RemoteCacheException.html" title="class in net.sf.ehcache.distribution"><CODE>RemoteCacheException</CODE></A> if an issue occurs in remote synchronous replication
<li>
<li>
</ul>
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<DL>
<DT><B>Version:</B></DT>
<DD>$Id: CacheExceptionHandler.java 604 2008-04-25 02:20:57Z gregluck $</DD>
<DT><B>Author:</B></DT>
<DD><a href="mailto:gluck@gregluck.com">Greg Luck</a></DD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sf/ehcache/exceptionhandler/CacheExceptionHandler.html#onException(net.sf.ehcache.Ehcache, java.lang.Object, java.lang.Exception)">onException</A></B>(<A HREF="../../../../net/sf/ehcache/Ehcache.html" title="interface in net.sf.ehcache">Ehcache</A>&nbsp;ehcache,
java.lang.Object&nbsp;key,
java.lang.Exception&nbsp;exception)</CODE>
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Called if an Exception occurs in a Cache method.</TD>
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<A NAME="onException(net.sf.ehcache.Ehcache, java.lang.Object, java.lang.Exception)"><!-- --></A><H3>
onException</H3>
<PRE>
void <B>onException</B>(<A HREF="../../../../net/sf/ehcache/Ehcache.html" title="interface in net.sf.ehcache">Ehcache</A>&nbsp;ehcache,
java.lang.Object&nbsp;key,
java.lang.Exception&nbsp;exception)</PRE>
<DL>
<DD>Called if an Exception occurs in a Cache method. This method is not called
if an <code>Error</code> occurs.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>ehcache</CODE> - the cache in which the Exception occurred<DD><CODE>key</CODE> - the key used in the operation, or null if the operation does not use a key or the key was null<DD><CODE>exception</CODE> - the Exception caught.</DL>
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