hi ,every one , i am may be a newer .
my problem is following

1 .context
tomcat 4.1.27 ,all libs hibernate needed put in the web-info/lib dir.

2. if not set cache in hibernate.prporites file , it works use the default ehcache and work fine,but if i set the
hibernate.cache.provider_class net.sf.hibernate.cache.HashtableCacheProvider or any other provider ,

error is following :
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net.sf.hibernate.HibernateException: could not instantiate CacheProvider: net.sf.hibernate.cache.HashtableCacheProvider
at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:115)
at net.sf.hibernate.cfg.Configuration.buildSettings(Configuration.java:1072)
at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:718)
at com.fleety.invest.hibernate2.plugin.HibernatePlugIn.init(HibernatePlugIn.java:163)
at org.apache.struts.action.ActionServlet.initModulePlugIns(ActionServlet.java:1105)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:471)
at javax.servlet.GenericServlet.init(GenericServlet.java:256)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:935)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:823)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3420)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:2567)
at org.apache.catalina.loader.WebappLoader$WebappContextNotifier.run(WebappLoader.java:1369)
at java.lang.Thread.run(Thread.java:534)
Caused by: java.lang.ClassNotFoundException: net/sf/hibernate/cache/HashtableCacheProvider
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:141)
at net.sf.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:75)
at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:112)
... 12 more

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i know the class file in the hibernate2.jar .and it MUST be there .
i also see the following warn

net.sf.hibernate.cache.CacheFactory - read-only cache configured for mutable:

i try hibernaterc version ,the problem keep the same
also try set the cglib to false , not work.

anybody can give me some advs ?
thanks

I tried specifying HashTableCache and/or HashTableCacheProvider a few weeks ago and failed to figure out how to use it in Hibernate (v2.02, v2.03, and v2.1beta6) under Tomcat 4.1.24 (and .27 and .29).

I was able to use other cache providers such as:

1) net.sf.hibernate.cache.OSCacheProvider - requires oscache-2.0.1.jar.
2) net.sf.hibernate.cache.JCSCacheProvider - requires jcs.jar

I hope this helps. Personally, I'd like to know how to use the HashTableCacheProvider.

I hope this information helps.

Regards,
David

thanks a lot for your reply , i guess my problem keep no sense to the special provider,i also try the OSCacheProvider ,the same problem.

could you be kind give me some basic config info of you make the cache set in hibernate.properies file ?

I forgot to mention you have to have an oscache.properties file in your WEB-INF/classes folder. Mine is empty (just one line with a pound comment). I got my oscache-2.0.1.jar file from:

http://www.opensymphony.com/oscache/download.html

I only reference oscache in one place in my hibernate configuration by setting the cache.provider_class to net.sf.hibernate.cache.OSCacheProvider. Of course, I'm a hibernate.cfg.xml proponent so if you use hibernate.properties, don't forget to name the property something like hibernate.cache.provider_class or something. :)

Good night and good luck,
David

Guys, the CacheProvider framework is only available in 2.1. If you are using 2.1, net.sf.hibernate.cache.HashtableCacheProvider is certainly there (check the jar).

As to that warning, you should probably use mutable="false" for classes that you cache with usage="read-only".

i think i did not explain detail enough,

i CAN use the cache without any config set on the cache in the config file .hibernate use the default one

###########
2003-12-02 16:32:04,533 [Thread-15] WARN net.sf.ehcache.config.Configurator - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: ###########

it work great and have significant performance impove ,but i can not config it .

thanks to humble and gavin reply