Basic help required for the JAVA API

[Greg Whalin]

Ahh right, I missed that part about one server.  Yeah, likely a
serialization issue.

gw

On 4/9/07, Steven Grimm <sgrimm at facebook.com> wrote:
>
>  If he only has one server, how can it be the hashing? All the keys will
> resolve to that one server no matter what the hash algorithm is.
>
> I think it's the serialization. Java's deserializer has no idea what to
> make of PHP's serialization format.
>
> As I see it you have two options, if that's indeed the problem: you can
> write your own serializer in PHP to serialize to some other format (probably
> not Java's native format since that would be a real pain to get right in
> PHP) or you can parse the PHP format in Java. PHP's serialization format is
> pretty simple so that'd be the route I'd take. You may be able to make some
> use of the PHP-in-Java implementation, Quercus:
>
> http://quercus.caucho.com/
>
> It has code to deal with PHP-serialized objects, but I'm not sure what it
> ends up building on the Java side.
>
> -Steve
>
>
> Greg Whalin wrote:
>
> I doubt this is due to to serialization issues, though it could be.  By
> default, the Java client hashes using the default String hashing as it is
> fast and pretty good for even key distribution.  The other clients have all
> agreed on a common hashing algorithm.  The java client supports this as
> well, but you need to configure it to use it.  So, you should:
>
> String[] serverlist = { "localhost:11001" };
> SockIOPool memcached_pool = SockIOPool.getInstance();
> memcached_pool.setServers( serverlist );
> memcached_pool.setHashingAlg( SockIOPool.NEW_COMPAT_HASH );
> memcached_pool.initialize();
>
> MemCachedClient mc = new MemCachedClient();
> mc.setPrimitiveAsString(true);
>
> This sets the hashing alg to the compat one (which I assume is used by the
> PHP client), as well as stores all primitives as strings, which I think the
> PHP client does as well.
>
> gw
>
> On 4/9/07, Arnaud Connois <arnaud-memcached at connois.com> wrote:
> >
> >
> > Hi all,
> >
> > I've been using memcached for many year with great success with PHP.
> >
> > I'm building now a new application based on the Java API of Memcached
> > which is going to run in background of my website
> > (Apache/PHP/Mysql/Memcached) to generate complex data structures out of
> > existing structures already in the cache.
> >
> > I've plugged into my mysql database quite easily, and I am now trying to
> > plug into memcached. I'm kind of stuck at a very basic level to retreive
> >
> > data stored previously from PHP, probably beacuse of the fact that I'm
> > not very used to Java, and more to PHP...
> >
> > So here is the idea :
> >
> > I have some arrays stored by php in the memcached and I'm trying to read
> >
> > them from the Java API...
> >
> > Here is a sample code...
> >
> >         String[] serverlist = { "localhost:11001" };
> >         SockIOPool memcached_pool = SockIOPool.getInstance();
> >         memcached_pool.setServers( serverlist );
> >         memcached_pool.initialize();
> >
> >         MemCachedClient mc = new MemCachedClient();
> >
> >         Object myarray = mc.get( "list__2__smileys_to" );
> >         System.out.println( "Query Result : " + myarray );
> >
> > I get a null result...
> >
> > Query Result : null
> >
> > I guess it cannot make sence of the serialized data...
> >
> > To make sure my structiure was there and readable I tried with
> > "asString" set to TRUE in the get method :
> >
> >         String mystring = (String)mc.get( "list__2__smileys_to", null,
> > true );
> >         System.out.println( "Query Result : " + mystring );
> >
> > and I get a correct result :
> >
> > com.danga.MemCached.MemCachedClient Mon Apr 09 15:57:11 CEST 2007 - ++++
> > retrieving object and stuffing into a string.
> > Query Result :
> > a:15:{i:11;s:1:"3";i:3;s:1:"4";i:7;s:1:"3";i:9;s:1:"4";i:10;s:1:"3";i:21;s:1:"1";i:24;s:1:"4";i:25;s:1:"4";i:30;s:1:"3";i:19;s:1:"1";i:18;s:1:"0";i:17;s:1:"6";i:16;s:1:"1";i:14;s:1:"4";i:1;s:1:"3";}
> >
> >
> > - How can I use this data store as a PHP array from the Java API and
> > have the serialised array being store into a Java object ?
> > - Which java object showld I use ?
> > - What synthax shoud I use ?
> >
> > I'm sure we have a few Java gurus on this list who are gonna fix that
> > for me in a few minutes...
> >
> > Many Thanks
> >
> > Arnaud
> >
> >
> >
> >
> >
> >
> >
>
>
> --
> Greg Whalin
>
>
>


-- 
Greg Whalin
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