Jeff, Niko
I don't know exactly your problem, but I DO know where two session
factories could come from =)
I was stepping through all the HibernateManager code just today and
see the following in the HibernateManager.createSessionFactory... (it
creates one session factory for general purpose stuff, then another
for "sync" or updates/inserts....
Hope this might help.
PW
_________
sessionFactory = hibernateConfig.buildSessionFactory();
if (useTransactions)
{
// If the DataService is managing transactions, then we need to
change the context of the Hibernate
// session such that the DataService's management of the
transaction will handle commiting and closing
// the session -- this is only needed on sync methods, not on get,
fill or count methods
hibernateConfig.setProperty("hibernate.current_session_context_class",
"flex.data.adapters.FlexHibernateSessionContext");
//hibernateConfig.setProperty("hibernate.transaction.factory_class",
"org.hibernate.transaction.JTATransactionFactory");
//hibernateConfig.setProperty("jta.UserTransaction",
TransactionUtility.USER_TX_JNDI_NAME);
syncSessionFactory =
hibernateConfig.buildSessionFactory();
}
--- In [email protected], "Jeff Vroom" <[EMAIL PROTECTED]> wrote:
>
> I think the important part of the error is here:
>
>
>
> ... 41 more
> Caused by: net.sf.ehcache.CacheException: Cannot parseConfiguration
> CacheManager. Attempt to create a new instance of CacheManager using the
> diskStorePath "/tmp/cache" which is already used by an existing
> CacheManager. The source of the configuration was classpath.
> at net.sf.ehcache.CacheManager.configure(CacheManager.java:248) at
> net.sf.ehcache.CacheManager.init(CacheManager.java:193) at
> net.sf.ehcache.CacheManager.<init>(CacheManager.java:180) at
> org.hibernate.cache.EhCacheProvider.start(EhCacheProvider.java:124)
>
>
>
> It seems like there are two session factories being started up which are
> configured to use the same cache. This could be because you have two
> web apps on the same machine each using hibernate. I don't think that
> flex would be trying to create two SessionFactories unless you were
> using more than one hibernate configuration file. Flex should share one
> session factory from all destinations which use the same hibernate
> configuration file. There must be some way to set the path name of the
> cache... maybe you just need to specify a different path name for this
> cache for the FDMS version of hibernate?
>
>
>
> Jeff
>
>
>
> ________________________________
>
> From: [email protected] [mailto:[EMAIL PROTECTED] On
> Behalf Of Niko Schmuck
> Sent: Wednesday, December 06, 2006 8:18 AM
> To: [email protected]
> Subject: [flexcoders] FDS: Using Hibernate second-level cache possible?
>
>
>
> Hi together,
>
> As a newbie I would like to get your advices on how to use the Hibernate
> caching for Flex Data Management Services. Is this possible at all or a
> contra-diction to the HibernateAssembler?
>
> For my java applications I currently use second-level caching to speed
> up
> data access with Hibernate (3.2), which I would also like to use for my
> Flex app:
>
> For this I use in the Hibernate mapping definition (inside the class
> element):
>
> <cache usage="read-write"/>
>
> Unfortunately if I turn EhCache on (via the hibernate configuration) ...
>
> <property
> name="cache.provider_class">org.hibernate.cache.EhCacheProvider</propert
> y>
>
> ... the tomcat logs show an ugly stack-trace:
>
> CacheException: Attempt to restart an already started EhCacheProvider.
>
> See below for the exception in its full-length beauty. The only way to
> overcome this, to avoid caching at all by setting:
>
> <property
> name="cache.provider_class">org.hibernate.cache.NoCacheProvider</propert
> y>
>
> (Also using the recommended SingletonEhCacheProvider does not help)
>
> Any help much appreciated.
>
> Thanks,
> Niko
>
> 2006-12-05 08:57:08,737 [main] ERROR
> org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/useradmi
> n]
> - Servlet /useradmin threw load() exception
> java.lang.ExceptionInInitializerError
> at
> flex.data.assemblers.HibernateManager.createSessionFactory(HibernateMana
> ger.java:66)
> at
> flex.data.assemblers.HibernateManager.<init>(HibernateManager.java:44)
> at
> flex.data.assemblers.HibernateAssembler.initialize(HibernateAssembler.ja
> va:137)
> at
> flex.messaging.factories.JavaFactory$JavaFactoryInstance.createInstance(
> JavaFactory.java:254)
> at
> flex.messaging.factories.JavaFactory.createFactoryInstance(JavaFactory.j
> ava:93)
> at
> flex.messaging.FactoryDestination.getFactoryInstance(FactoryDestination.
> java:76)
> at flex.data.adapters.JavaAdapter.server(JavaAdapter.java:158) at
> flex.data.adapters.JavaAdapter.setSettings(JavaAdapter.java:119)
> at flex.messaging.Destination.createAdapter(Destination.java:279)
> at
> flex.messaging.Destination.initDestination(Destination.java:103)
> at
> flex.messaging.FactoryDestination.initDestination(FactoryDestination.jav
> a:58)
> at flex.data.DataService.createDestination(DataService.java:90) at
> flex.messaging.services.AbstractService.createDestinations(AbstractServi
> ce.java:82)
> at
> flex.messaging.config.MessagingConfiguration.createServices(MessagingCon
> figuration.java:187)
> at
> flex.messaging.config.MessagingConfiguration.configureBroker(MessagingCo
> nfiguration.java:84)
> at
> flex.messaging.MessageBrokerServlet.init(MessageBrokerServlet.java:105)
> at
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.jav
> a:1105)
> at
> org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:932)
> at
> org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.j
> ava:3951)
> at
> org.apache.catalina.core.StandardContext.start(StandardContext.java:4225
> )
> at
> org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.ja
> va:759)
> at
> org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739)
> at
> org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524)
> at
> org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:
> 608)
> at
> org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java
> :535)
> at
> org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:470)
> at
> org.apache.catalina.startup.HostConfig.start(HostConfig.java:1122)
> at
> org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:31
> 0)
> at
> org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSu
> pport.java:119)
> at
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1021)
> at
> org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
> at
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
> at
> org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
> at
> org.apache.catalina.core.StandardService.start(StandardService.java:450)
> at
> org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
> at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
> a:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
> Impl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
> at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
> Caused by: org.hibernate.cache.CacheException: Attempt to restart an
> already started EhCacheProvider. Use sessionFactory.close() between
> repeated calls to buildSessionFactory. Consider using
> net.sf.ehcache.hibernate.SingletonEhCacheProvider.
> at
> org.hibernate.cache.EhCacheProvider.start(EhCacheProvider.java:134)
> at
> org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:183
> )
> at
> org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1
> 218)
> at
> flex.data.assemblers.HibernateManager.createSessionFactory(HibernateMana
> ger.java:61)
> ... 41 more
> Caused by: net.sf.ehcache.CacheException: Cannot parseConfiguration
> CacheManager. Attempt to create a new instance of CacheManager using the
> diskStorePath "/tmp/cache" which is already used by an existing
> CacheManager. The source of the configuration was classpath.
> at net.sf.ehcache.CacheManager.configure(CacheManager.java:248) at
> net.sf.ehcache.CacheManager.init(CacheManager.java:193) at
> net.sf.ehcache.CacheManager.<init>(CacheManager.java:180) at
> org.hibernate.cache.EhCacheProvider.start(EhCacheProvider.java:124)
> ... 44 more
>
