ibatis-user-java mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Clinton Begin <clinton.be...@gmail.com>
Subject Re: [iBatis 3] Cache troubles
Date Wed, 18 Nov 2009 18:38:08 GMT
Maybe I don't understand...

  * Are you saying that you have this working in iBATIS 2, but can't get it
to work with iBATIS 3?

  * Or you can't get it to work in either, but understand iB2 better so want
it described in those terms?

Cheers,
Clinton

On Wed, Nov 18, 2009 at 2:37 AM, Simone Tripodi <simone.tripodi@gmail.com>wrote:

> Hi Clinton,
> unfortunately the official version of Memcached - the one we've been
> using on production for years - doesn't support namespaces/tags, there
> is a patched version called Memcached-tags[1] but isn't officially
> supported :(
> Can you provide me please any idea how to supply this lack? Is there
> any way to obtain the cache group, speaking in iBatis2 therms?
> Thanks in advance, best regards
> Simone
>
> [1] http://code.google.com/p/memcached-tag/
>
> On Wed, Nov 18, 2009 at 7:49 AM, Simone Tripodi
> <simone.tripodi@gmail.com> wrote:
> > Hi Clinton,
> > thanks for your kind reply, I'll let you know ASAP the results of my
> > tries if you're interested on :)
> > Best regards,
> > Simone
> >
> > On Wed, Nov 18, 2009 at 12:25 AM, Clinton Begin <clinton.begin@gmail.com>
> wrote:
> >> I'll try to answer in two short statements to see if that helps.  I
> won't
> >> have time to look through the code anytime soon...
> >>
> >>   * I think you can solve the first problem of flushing the whole cache
> by
> >> passing the cache's namespace to memcached as a cache domain (I'm not
> sure
> >> what memcached calls them, but essentially flush only a partition or
> group
> >> of the cached elements (OSCache calls this a domain I believe).
> >>
> >>   * The putObject isn't called until the end of the session, or when
> commit
> >> is called.  It's a transactional cache, so if you rollback a transaction
> >> before closing the session or committing... the cache won't be updated
> with
> >> potentially erroneous or inconsistent data.
> >>
> >> Hope that helps,
> >> Clinton
> >>
> >> On Tue, Nov 17, 2009 at 1:23 PM, Simone Tripodi <
> simone.tripodi@gmail.com>
> >> wrote:
> >>>
> >>> Hi all guys,
> >>> I've been doing some experiment using the last beta of iBatis 3 and
> >>> I've the feeling you happily fixed the inglorious IBATIS-555 issue
> >>> about the CacheKey unique hashcode generation on different JVMs :)
> >>>
> >>> Now I've been porting my old stuff to the new iBatis implementation
> >>> and everything has worked fine until I plugged-in the cache, I really
> >>> hope you can help me to understand where I'm wrong: I implemented a
> >>> Memcached-based Cache class, wrapping the spy memcached client
> >>> (code.google.com/p/spymemcached/), injecting a singleton instance to
> >>> the Configuration programmatically using google-guice 2 and finally
> >>> referenced in the sql-map via the snippet:
> >>>
> >>> <cache-ref namespace="memcached"/>
> >>>
> >>> What I noticed, reading the logs, is the following:
> >>> * when flushing the statements defined in the sql map, is called the
> >>> method org.apache.ibatis.cache.Cache#clear(): that makes me a little
> >>> worried, because in a memcached context I ideally want to use just one
> >>> memcached client instance and reference it in the whole application,
> >>> when performing an insert operation I wouldn't flush the whole cache,
> >>> but rather remove only the interested statements; since I'm still used
> >>> to the old iBatis2 cache model, how can I fix it?
> >>> * no data is cached, the method
> >>> org.apache.ibatis.cache.Cache#putObject(Object,Object) is never
> >>> called;
> >>>
> >>> All the code I've been producing is public, you can find it on
> >>> google-code[1], and on the test directory you can find the scenario[2]
> >>> I described
> >>>
> >>> Thanks in advance for your help, any kind of suggestion will be very
> >>> appreciated!!!
> >>> Simone
> >>>
> >>>
> >>> [1] http://code.google.com/p/ibaguice/source/browse/#svn/trunk
> >>> [2]
> >>>
> http://code.google.com/p/ibaguice/source/browse/trunk/src/test/java/com/ibaguice/SimpleTestCase.java
> >>> --
> >>> http://www.google.com/profiles/simone.tripodi
> >>>
> >>> ---------------------------------------------------------------------
> >>> To unsubscribe, e-mail: user-java-unsubscribe@ibatis.apache.org
> >>> For additional commands, e-mail: user-java-help@ibatis.apache.org
> >>>
> >>
> >>
> >
> >
> >
> > --
> > http://www.google.com/profiles/simone.tripodi
> >
>
>
>
> --
> http://www.google.com/profiles/simone.tripodi
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-java-unsubscribe@ibatis.apache.org
> For additional commands, e-mail: user-java-help@ibatis.apache.org
>
>

Mime
View raw message