I like to congratulate for the release. And I want to make a question.

Is possible to use JCS with hibernate second level cache?

Thanks,
Daniel

Why would you want to do that?

The only reason anyone would want to use JBCS is to be able to run queries on cached objects. If you are using Hibernate, Hiberate's HQL will already allow you to run queries so you don't need JBCS. JBossCache-core is all you really need.

Manik,

I'm thinking on this use case ...

When I start the JBoss server I run a script to get every Person entity on the cache.

I would like to select a Person based on user input without reaching the database server. Is this possible using only the cache?

Thanks in advace,
Daniel

Sure - hibernate HQL queries will do this for you, provided you have enabled query and entity caching.

My poor English is limiting my explanation...

I only want to hit the DB server with the script, not every time a user make a request because I have thousands of concurrent access crashing my DB server. The problem with your suggestion is that the queries change depending on user's input so it misses the query cache.

Thanks,
Daniel

So you want to preload the entity cache? JBCS won't help you with that. :)

I suggest you write a startup script that requests for all of the entities using a Hibernate session, so this makes sure all of the entities are cached before people start using the system. This is more a discussion for the Hibernate user forum, TBH. :)

Thank you for your quick reply.

I know Hibernate can't help me with this problem. I know because I was Hibernate instructor in South America.

I'm thinking in using JBCS in some way to resolve this problem. I'm working on a prototype, if you are interested I can share it ... when I get it working.

Tks,
Daniel

Sure, will be interested to know. :)

Manik,

I make a prototype with JBCS as stand-alone application and it work perfect.
But when I try to run it inside JBoss AS I'm always getting same exception.
I'm lost. Could you help me?

Tks,
Daniel

Exception is:

java.lang.VerifyError: (class: org/jboss/cache/config/Configuration, method: setCacheLoaderConfig signature: (Lorg/jboss/cache/config/CacheLoaderConfig;)V) Incompatible argument to function)


code is:

CacheFactory<String, String> factory = new DefaultCacheFactory<String, String>();
Cache cache = factory.createCache(config);

Which version of JBoss AS is this? Also do you package jbosscache-core in your WAR or EAR?