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ErrorHandler
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com.google.appengine.api.memcache</FONT>
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Interface ErrorHandler</H2>
<DL>
<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../../com/google/appengine/api/memcache/LogAndContinueErrorHandler.html" title="class in com.google.appengine.api.memcache">LogAndContinueErrorHandler</A>, <A HREF="../../../../../com/google/appengine/api/memcache/StrictErrorHandler.html" title="class in com.google.appengine.api.memcache">StrictErrorHandler</A></DD>
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<DT><PRE>public interface <B>ErrorHandler</B></DL>
</PRE>

<P>
Handles errors raised by the <code>MemcacheService</code>, registered with
 <A HREF="../../../../../com/google/appengine/api/memcache/MemcacheService.html#setErrorHandler(com.google.appengine.api.memcache.ErrorHandler)"><CODE>MemcacheService.setErrorHandler(ErrorHandler)</CODE></A>.

 The default error handler is an instance of <A HREF="../../../../../com/google/appengine/api/memcache/LogAndContinueErrorHandler.html" title="class in com.google.appengine.api.memcache"><CODE>LogAndContinueErrorHandler</CODE></A>.
 This will log the underlying error condition, but emulate cache-miss
 behavior in response rather than surfacing the problem to calling code.  A
 less permissive alternative is <A HREF="../../../../../com/google/appengine/api/memcache/StrictErrorHandler.html" title="class in com.google.appengine.api.memcache"><CODE>StrictErrorHandler</CODE></A>, which will
 instead throw a <A HREF="../../../../../com/google/appengine/api/memcache/MemcacheServiceException.html" title="class in com.google.appengine.api.memcache"><CODE>MemcacheServiceException</CODE></A> to expose any errors for
 application code to resolve.
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/appengine/api/memcache/ErrorHandler.html#handleDeserializationError(com.google.appengine.api.memcache.InvalidValueException)">handleDeserializationError</A></B>(<A HREF="../../../../../com/google/appengine/api/memcache/InvalidValueException.html" title="class in com.google.appengine.api.memcache">InvalidValueException</A>&nbsp;ivx)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Handles deserialization errors.</TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/appengine/api/memcache/ErrorHandler.html#handleServiceError(com.google.appengine.api.memcache.MemcacheServiceException)">handleServiceError</A></B>(<A HREF="../../../../../com/google/appengine/api/memcache/MemcacheServiceException.html" title="class in com.google.appengine.api.memcache">MemcacheServiceException</A>&nbsp;ex)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Handles back-end service errors.</TD>
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<A NAME="handleDeserializationError(com.google.appengine.api.memcache.InvalidValueException)"><!-- --></A><H3>
handleDeserializationError</H3>
<PRE>
void <B>handleDeserializationError</B>(<A HREF="../../../../../com/google/appengine/api/memcache/InvalidValueException.html" title="class in com.google.appengine.api.memcache">InvalidValueException</A>&nbsp;ivx)</PRE>
<DL>
<DD>Handles deserialization errors.  This method is called from either of the
 <A HREF="../../../../../com/google/appengine/api/memcache/MemcacheService.html#get(java.lang.Object)"><CODE>get</CODE></A> methods, if the retrieved value
 cannot be deserialized.  This normally indicates an application upgrade
 since the cache entry was stored, and should thus be treated as a cache
 miss, which is the behavior of <A HREF="../../../../../com/google/appengine/api/memcache/LogAndContinueErrorHandler.html" title="class in com.google.appengine.api.memcache"><CODE>LogAndContinueErrorHandler</CODE></A> (the
 default).
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<DD><DL>
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<A NAME="handleServiceError(com.google.appengine.api.memcache.MemcacheServiceException)"><!-- --></A><H3>
handleServiceError</H3>
<PRE>
void <B>handleServiceError</B>(<A HREF="../../../../../com/google/appengine/api/memcache/MemcacheServiceException.html" title="class in com.google.appengine.api.memcache">MemcacheServiceException</A>&nbsp;ex)</PRE>
<DL>
<DD>Handles back-end service errors.  This method is called
 from any of the <code>MemcacheService</code> methods in the event of a
 service error.  The handler may throw any <CODE>RuntimeException</CODE>,
 or it may simply return for "permissive" error handling, which will
 generally emulate behavior of a cache miss due to a discarded entry.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>ex</CODE> - the service error exception</DL>
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