Re: FW: [Hibernate-devel] Getting Collections to pull data from the cache

[Christian M. <vc...@cl...>]

----- Original Message -----
From: "Urberg, John" <ju...@ve...>
To: <Gavin_King/Cirrus%CI...@ci...>
Cc: <hib...@li...>
Sent: Friday, August 09, 2002 3:13 PM
Subject: RE: FW: [Hibernate-devel] Getting Collections to pull data from the
cache


> >>And I would expect 3 SQL statements with all the many-to-ones and
> >>collections should get resolved from the cache.
> >
> >To enable caching, you need to add
> >
> ><jcs-cache usage="read-write"/>

you can of course use usage='read-only' isnt it ?

> >
> >to all <class>, <set>, <map>, <list>, <array>, <primitive-array> elements
> >that you want to cache.
>
> Ahh, I thought that was optional.  That would explain it.

I am wondering something here:

If we got this simple one to many:

<set role="bars" table="foobars">
    <key column="foo_id"/>
    <one-to-many class="com.illflow.Bar"/>
</set>

i have declarated the class bar and the class foo to use jcs-cache, shoudnt
the collection of bar in the class foo cached automatically ?
If i have to specify that the collection need to be cached, will it use the
same JCS region as the com.illflow.Bar ?



>
> So I tried it out and got the following warning:
>
>    WARNING: Could not instantiate cache - probably the JCS jar is
> missing:...
>
> Then I looked at the JCS web site to see what the dependencies are and
found
> the following:
>
>    commons-configuration  1.0-dev  commons-configuration-1.0-dev.jar
>    commons-logging  1.0  commons-logging-1.0.jar
>    commons-lang  1.0-dev  commons-lang-1.0-dev.jar
>    concurrent  1.0  concurrent-1.0.jar
>    hsqldb  1.7.0  hsqldb-1.7.0.jar
>    log4j  1.1.3  log4j-1.1.3.jar
>    servletapi  2.2  servletapi-2.2.jar
>    javagroups  2.0  javagroups-2.0.jar
>    jisp  1.0.2  jisp-1.0.2.jar
>    tomcat-util  3.2.1  tomcat-util-3.2.1.jar
>    velocity  1.3-dev  velocity-1.3-dev.jar
>    xmlrpc  1.1  xmlrpc-1.1.jar
>    stratum  1.0-b2-dev  stratum-1.0-b2-dev.jar
>
> Anyone know where I can find all these in one spot?  (I can't find
> commons-configuration anywhere)  Maybe it's time to build a third party
jar
> file so folks (like me for example) don't have to track all this stuff
down
> seperately.

Hibernate got everything you need to run JCS, are you sure you put the
cache.ccf in the classpath, it's more likely the issue here.

Regards
Christian Meunier