Replication, CacheMarshaller, Region

[ekobir]

Hi All

As I would like to store some custom externalizable classes in the cache, i created region on the cache. But it didnt help me not to get ClassNotFoundException.

Scenario exactly as explained in faq.
http://www.jboss.org/file-access/default/members/jbosscache/freezone/docs/3.0.3.GA/faq_en/html_single/index.html#d0e666

I'm using JBoss EAP 5.0.0 (Only supported version available). It uses jbosscache 3.0,3GA. My jboss-beans.xml file under META-INF of ear file. So when class is loaded,
cache will be created on that server.

My Question is

What is the best way for handling class loader problem?
Do I need to write a Marshaller from scratch or is there any delegation available for application to provide class loader?



please find cache configuration below.

<!-- First we create a Configuration object for the cache -->
 <bean name="ConfigurationCacheConfig"
 class="org.jboss.cache.config.Configuration">
 <!-- Externally injected services -->
 <property name="runtimeConfig">
 <bean class="org.jboss.cache.config.RuntimeConfig">
 <property name="transactionManager">
 <inject bean="jboss:service=TransactionManager"
 property="TransactionManager"/>
 </property>
 <property name="muxChannelFactory">
 <inject bean="JChannelFactory"/>
 </property>
 </bean>
 </property>

 <property name="multiplexerStack">udp</property>
 <property name="clusterName">
 ${jboss.partition.name:DefaultPartition}-ConfigurationCache
 </property>
 <property name="nodeLockingScheme">OPTIMISTIC</property>
 <property name="isolationLevel">NONE</property>
 <property name="cacheMode">REPL_SYNC</property>
 <property name="stateRetrievalTimeout">15000</property>
 <property name="syncReplTimeout">20000</property>
 <property name="lockAcquisitionTimeout">15000</property>
 <property name="exposeManagementStatistics">true</property>

 <property name="cacheLoaderConfig">
 <bean class="org.jboss.cache.config.CacheLoaderConfig">
 <!-- Do not change these TODO it was true -->
 <property name="passivation">false</property>
 <property name="shared">false</property>

 <property name="individualCacheLoaderConfigs">
 <list>
 <bean class="org.jboss.cache.loader.FileCacheLoaderConfig">
 <!-- Where passivated sessions are stored -->
 <property name="location">${jboss.server.data.dir}${/}session</property>
 <!-- Do not change these -->
 <property name="async">false</property>
 <property name="fetchPersistentState">true</property>
 <property name="purgeOnStartup">true</property>
 <property name="ignoreModifications">false</property>
 <property name="checkCharacterPortability">false</property>
 </bean>
 </list>
 </property>
 </bean>
 </property>
 </bean>

 <!-- Factory to build the Cache. -->
 <bean name="DefaultCacheFactory" class="org.jboss.cache.DefaultCacheFactory">
 <constructor factoryClass="org.jboss.cache.DefaultCacheFactory"
 factoryMethod="getInstance" />
 </bean>
 <!--The cache itself-->
 <bean name="ConfigurationCache" class="org.jboss.cache.Cache">
 <constructor factoryMethod="createCache">
 <factory bean="DefaultCacheFactory"/>
 <parameter class="org.jboss.cache.config.Configuration"><inject bean="ConfigurationCacheConfig"/></parameter>
 <parameter class="boolean">false</parameter>
 </constructor>
 </bean>

[ekobir]

I forgot to mention that setUseRegionBasedMarshallin is deprecated in the javadoc. According to javadoc, we should be doing following
" With isUseLazyDeserialization(), which is enabled by default, custom class loaders are handled implicitly. See the user guide for details on how this is handled. "

On the other hand I checked AbstractMarshaller under Tag 3.0.3GA and it includes following code...

@Start
@SuppressWarnings("deprecation")
protected void init()
{
this.useRegionBasedMarshalling = configuration.isUseRegionBasedMarshalling();
this.defaultInactive = configuration.isInactiveOnStartup();
}

Am I missing something? please help.

[manik]

CNFE? Have you set a special class loader on your region or something?

[ekobir]

Hi Manik

I was trying to use the configuration file in the first message as it is. When I deploy application on the second node, cache tries replicate itself but it is not able to find the correct class.
As I'm using jboss EAP 5.0.0, then i tried follow faq 2,35 and 2.38 but so far no luck to get it work...

Do you suggest that I should upgrade version to 3.1.0Ga?

[richsharples]

@ekobir if you have access to EAP 5.0.0 Alpha then you are a Red Hat customer so you should be able to get developer-level support from Red Hat directly - did you try that.

Rich Sharples
JBoss, a division of Red Hat

[ekobir]

Hi Rich

Thanks for suggestion. I'm trying to use forums for development problems before disturbing red hat customer support.

I think(not sure as I have other problems such as
http://www.jboss.org/index.html?module=bb&op=viewtopic&t=155517 ) adding following line int the config fixed my problem regarding cache.

true

Thanks

[ekobir]

<property name="useLazyDeserialization">
true
</property>