Memcache Java API / expiration time issue

[Richard 'toast' Russo]

Ryan,

Which version of the Java API are you using?



On Tue, 9 Nov 2004, Ryan Boyce wrote:

> We're running memcached 1.1 server, and using Java memcached client
> API.  Suddenly after storing data variables onto server, we'd receive an
> exception in retrieving variables back:
>
> #############################################
> com.danga.MemCached.MemCachedClient Tue Nov 09 01:04:20 PST 2004 - ++++
> ClassNot
> FoundException thrown while trying to deserialize for key: userObj
> com.danga.MemCached.MemCachedClient Tue Nov 09 01:04:20 PST 2004 - ++++
> exception thrown while trying to get object from cache for key: userObj
> com.danga.MemCached.MemCachedClient Tue Nov 09 01:04:20 PST 2004 - +++
> failed while trying to deserialize for key: userObj
> java.io.IOException: +++ failed while trying to deserialize for key:
> userObj
>        at
> com.danga.MemCached.MemCachedClient.loadItems(MemCachedClient.java:10
> 84)
>        at
> com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:850)
>        at
> com.danga.MemCached.MemCachedClient.get(MemCachedClient.java:816)
>        at _test__jsp._jspService(_test__jsp.java:61)
>
> com.danga.MemCached.SockIOPool Tue Nov 09 01:04:20 PST 2004 - ++++
> SockIOPool shutting down...
> com.danga.MemCached.SockIOPool Tue Nov 09 01:04:20 PST 2004 - ++++
> closing all internal pools.
> com.danga.MemCached.SockIOPool Tue Nov 09 01:04:20 PST 2004 - ++++
> SockIOPool finished shutting down.
> #########################################
>
> While standard Java objects like Integer can still be retrievied
> correctly, the expiration set and replace commands do not work
> correctly:
> a call to memClient.set(key, var, expireTime) would immediately expire
> the variable.  I found that out by immediately calling get on that
> variable:
>
> MemCachedClient mc = new MemCachedClient();
>
> String numberKey = "numberKey";
> Integer num = (Integer)mc.get(numberKey);
> if ( num == null )
> {
>    num = new Integer(49);
>    out.println("Cached number "+ num +" is NOT found "+ (new
> java.util.Date()) );
>    Calendar later = Calendar.getInstance();
>    later.add(Calendar.MINUTE, 5);
>    java.util.Date laterTime = later.getTime();
>    out.println("Storing number "+ num +" : "+ mc.set(numberKey, num) );
>    //out.println("  expiring at "+ laterTime );
>
>    num = (Integer)mc.get(numberKey);
>    out.println("search number back again: "+ num );
> }
> else
> {
>    out.println("Cached number "+ num +" is found "+ (new
> java.util.Date()) );
>    Calendar later = Calendar.getInstance();
>    later.add(Calendar.HOUR, 1);
>    java.util.Date laterTime = later.getTime();
>    //out.println("set number "+ num +" : "+ mc.set(numberKey, num,
> laterTime) +" expiring at "+ laterTime );
>
>    num = new Integer( num.intValue() + 1 );
>    out.println("replace number "+ num +" : "+ mc.replace(numberKey,
> num, laterTime ) +" to new value "+ num.intValue() +" expiring "+
> laterTime);
>
>    num = (Integer)mc.get(numberKey);
>    out.println("search number back again: "+ num );
> }
>
> #### Codes
> ####################################################
> #### Output
>
> ( 1st call )
> Cached number 49 is NOT found Tue Nov 09 01:11:02 PST 2004 Storing
> number 49 : true search number back again: 49
>
> ( 2nd call )
> Cached number 49 is found Tue Nov 09 01:10:48 PST 2004
> set number 49 : true expiring at Tue Nov 09 01:11:48 PST 2004 search
> number back again: null
>
>
>
> Thank You,
> Ryan Boyce
> Visit www.ioffer.com
> An easier way to buy and sell
>
>
>