JBossCache class is registered as an eXo container component in the configuration.xml file.
<component>
<key>org.jboss.cache.transaction.TransactionManagerLookup</key>
<type>org.jboss.cache.transaction.JBossStandaloneJTAManagerLookup</type>
</component>
JBossStandaloneJTAManagerLookup is used in a standalone environment, but GenericTransactionManagerLookup is used in the Application Server environment.