A JBoss AS 5.x application can be configured to use Infinispan 4.x as the Hibernate 2nd-level cache, replacing JBoss Cache.

1. Add the attached jar files to the ear lib directory. These include the core 4.1.0.GA Infinispan jar (infinispan-core.jar), the Hibernate/Infinispan integration jar back-ported from Hibernate 3.5 (hibernate-infinispan-3.3.2.GA_CP03.jar), the JGroups jar required by Infinispan 4.1.0 (jgroups-2.10.0.GA.jar), and other required 3rd party jars (river-1.2.3.GA.jar, marshalling-api-1.2.3.GA.jar)

2. Isolate the classloading to be ear-scoped by adding META-INF/jboss-classloading.xml

3. <classloading xmlns="urn:jboss:classloading:1.0" domain="simple-scoped" parent-first="false" />

4. Configure persistence.xml to use Infinispan instead of JBoss Cache:

   <?xml version="1.0" encoding="UTF-8"?>
   <persistence xmlns="http://java.sun.com/xml/ns/persistence"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
      version="1.0">
   <persistence-unit name="jpa-test">
       <jta-data-source>java:/PostgresDS</jta-data-source>
           <properties>
               <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" />
   
               <property name="hibernate.session_factory_name" value="SessionFactories/infinispan" />
   
               <property name="hibernate.cache.use_query_cache" value="true" />
               <property name="hibernate.cache.use_second_level_cache" value="true" />
               <property name="hibernate.generate_statistics" value="true" />
               <property name="hibernate.cache.use_structured_entries" value="true" />
   
               <property name="hibernate.cache.region_prefix" value="infinispan" />
   
               <property name="hibernate.show_sql" value="true" />
   
               <property name="hibernate.hbm2ddl.auto" value="validate" />
               
               <!-- Infinispan second level cache configuration -->
               <property name="hibernate.cache.region.factory_class" value="org.hibernate.cache.infinispan.InfinispanRegionFactory" />
           </properties>
       </persistence-unit>
   </persistence>