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hibernate-jbosscache2 and mvcc issues
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created by <a href="http://community.jboss.org/people/anandkrish">nithya anand</a> in <i>JBoss Cache</i> - <a href="http://community.jboss.org/message/543483#543483">View the full discussion</a>
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<div class="jive-rendered-content"><p>HI,</p><p>We opted to implement JbossCache-core-3.x on Local (means not on cluster) since it comes with mvcc. We were on jboss 4.2.3 (with hibernate 3.2) and realized that jbosscache-core- 3 needs hibernate 3.3. So we upgraded to Jboss 5 which comes with jbossCache-core - 3.0.1, Hibernate 3.3.1 and hibernate-jbosscache2 (3.3.1).</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Issues:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>1. Maven dependency conflict:  hibernate-jbosscache2 (3.3.1) has a dependency on jbosscache-core-2.1.1.GA. We found that hibernate-jbosscache2 (3.3.2) has a dependency on jbosscache-core-3.x.GA, but we didn't want to mess up with the default jars that comes with JBOSS 5.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>2. MVCC: (Caching turned on) Since with all these jar issues I want to make sure that the cache is working with mvcc turned on. But couldn't find any info on log that says that mvcc is turned on.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>the following is our persistence.xml</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    <persistence-unit name="abcdb"><br/>        <provider>org.hibernate.ejb.HibernatePersistence</provider><br/>         <jta-data-source>MySqlDS</jta-data-source><br/>        <properties><br/>            <property name="hibernate.show_sql" value="false"/><br/>            <property name="hibernate.format_sql" value="false"/><br/>            <property name="hibernate.use_sql_comments" value="false"/><br/>            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" /><br/>            <property name="hibernate.connection.useUnicode" value="true"/><br/>            <property name="hibernate.connection.characterEncoding" value="UTF-8"/><br/>            <br/>            <br/>            <!-- Caching configuration --><br/>            <property name="hibernate.cache.use_second_level_cache" value="true"/><br/>            <property name="hibernate.cache.region.factory_class" value="org.hibernate.cache.jbc2.MultiplexedJBossCacheRegionFactory"/><br/>            <property name="hibernate.cache.region.jbc2.cfg.shared" value="<span style="color: #ff0000;">blahblah.xml</span>"/><br/>            <property name="hibernate.current_session_context_class" value="jta"/>           <br/>            <br/>             <br/>            <property name="jboss.entity.manager.jndi.name" value="java:/abcdb"/><br/>            <property name="jboss.entity.manager.factory.jndi.name" value="java:/abcdbfactory"/><br/>            <property name="hibernate.transaction.factory_class" value="org.hibernate.transaction.JTATransactionFactory"/> <br/>            <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/><br/>        </properties><br/>  </persistence-unit></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>3. I wanted to provide a config file (even though not mandatory) for my JbossCache configuration to make sure mvcc is turned on.</p><p>But, even if i don't have blahblah.xml on my classpath, it wouldn't complaint. I don't see any error saying that blahblah.xml is missing.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Questions:</p><p>1. how can I make sure that my jbosscache is running on mvcc mode.</p><p>2. whats with the "hibernate.cache.region.jbc2.cfg.shared" value="blahblah.xml" file? do we need it at all?</p><p>Please answer my questions.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks,</p><p>Anand.</p></div>
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