Persistance in JBoss wildfly (in a spring application)

Question

I have a spring 3.2 application which has defined persisence with the following configuration:

<bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
    <property name="database" value="MYSQL"/>
    <property name="showSql" value="false"/>
    <property name="generateDdl" value="false"/>
    <property name="databasePlatform" value="org.hibernate.dialect.MySQL5Dialect"/>
</bean>

<util:map id="jpaPropertyMap">
        <entry key="hibernate.hbm2ddl.auto" value="update"/>
        <entry key="hibernate.cache.use_query_cache" value="true" />
        <entry key="hibernate.max_fetch_depth" value="4" />
        <entry key="hibernate.show_sql" value="false" />
        <entry key="hibernate.format_sql" value="false" />
        <entry key="hibernate.transaction.jta.platform" value="org.hibernate.service.jta.platform.internal.JBossAppServerJtaPlatform" />
        <entry key="hibernate.transaction.factory_class" value="org.hibernate.engine.transaction.internal.jta.CMTTransactionFactory" />
        <entry key="hibernate.connection.autocommit" value="false" />
</util:map>

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="jpaVendorAdapter" ref="jpaVendorAdapter"/>      
        <property name="jtaDataSource" ref="dataSource"  />
        <property name="jpaPropertyMap" ref="jpaPropertyMap" />
        <property name="persistenceUnitManager" ref="persistenceUnitManager" />
</bean>

<bean id="persistenceUnitManager" class="org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager" >
        <property name="packagesToScan"  value="gr.hcg.nautologhsh.domain" />
        <property name="defaultJtaDataSource" ref="dataSource" />
</bean>

My entity classes exist under the gr.hcg.nautologhsh.domain package. I am not using any persistance.xml files.

Now, this configuration is working fine in JBoss 8 wildfly. However when I see the Administration console of JBoss, in the tag JPA, I don't see any persistance units.

From some googling I think that the persistence units have to be configured through JBoss and not through Spring in order to be visible there - is that true ? I can't really understand why there could be different PUs in JBoss - how can they be used ? The documentation of JBoss is very spartian in that subject and I couldn't understand many things :(

Can somebody explain to me how can I define JBoss persistence units and show these in the JPA tag of wildfly's administration console ?

Update

I created a persistence.xml with the following contents:

<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_2_0.xsd"
             version="2.0">

    <persistence-unit name="nautologhshPU" transaction-type="JTA">

        <jta-data-source>java:jboss/datasources/nautologhsh</jta-data-source>

    </persistence-unit>
</persistence>

changed my datasource-config.xml beans like ths:

<jee:jndi-lookup  id="dataSource" jndi-name="java:jboss/datasources/nautologhsh" resource-ref="false" />

<tx:jta-transaction-manager  />

<jee:jndi-lookup jndi-name="java:comp/env/jpa/EntityManager" id="entityManager" expected-type="javax.persistence.EntityManager" />

and added the following to web.xml

<persistence-context-ref>
    <persistence-context-ref-name>jpa/EntityManager</persistence-context-ref-name>
    <persistence-unit-name>nautologhshPU</persistence-unit-name>
</persistence-context-ref>

And now get the following error:

20:24:41,839 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 52) MSC000001: Failed to start service jboss.persistenceunit."Nautologhsh.war#nautologhshPU": org.jboss.msc.service.StartException in service jboss.persistenceunit."Nautologhsh.war#nautologhshPU": org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.service.classloading.spi.ClassLoaderService]
        at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:169) [wildfly-jpa-8.0.0.Beta1.jar:8.0.0.Beta1]
        at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:117) [wildfly-jpa-8.0.0.Beta1.jar:8.0.0.Beta1]
        at java.security.AccessController.doPrivileged(Native Method) [rt.jar:1.7.0_45]
        at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:463) [wildfly-security-manager-1.0.0.Beta3.jar:1.0.0.Beta3]
        at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:178) [wildfly-jpa-8.0.0.Beta1.jar:8.0.0.Beta1]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_45]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_45]
        at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]
        at org.jboss.threads.JBossThread.run(JBossThread.java:122) [jboss-threads-2.1.1.Final.jar:2.1.1.Final]
Caused by: org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.service.classloading.spi.ClassLoaderService]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:127)
        at org.hibernate.envers.event.EnversIntegrator.integrate(EnversIntegrator.java:65)
        at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:310)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1837)
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:854)
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:847)
        at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:396)
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:846)
        at org.jboss.as.jpa.hibernate4.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44)
        at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:151) [wildfly-jpa-8.0.0.Beta1.jar:8.0.0.Beta1]
        ... 8 more

20:24:41,861 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) JBAS014613: Operation ("deploy") failed - address: ([("deployment" => "Nautologhsh.war")]) - failure description: {"JBAS014671: Failed services" => {"jboss.persistenceunit.\"Nautologhsh.war#nautologhshPU\"" => "org.jboss.msc.service.StartException in service jboss.persistenceunit.\"Nautologhsh.war#nautologhshPU\": org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.service.classloading.spi.ClassLoaderService]
    Caused by: org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.service.classloading.spi.ClassLoaderService]"}}

Does any body know what is this org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.service.classloading.spi.ClassLoaderService] ??

Solution

You can take a look at this quickstart example: https://github.com/sgilda/wildfly-quickstart/blob/master/greeter-spring which uses a META-INF/persistence.xml file an in which Spring configuration uses lookups to retrieve the EntityManager and the Datasource from Wildfly:

<!-- Look up the database in JNDI -->
<jee:jndi-lookup jndi-name="java:jboss/datasources/ExampleDS" id="dataSource"
  expected-type="javax.sql.DataSource" />

<!-- Look up the container deployed EntityManager -->
<jee:jndi-lookup jndi-name="java:comp/env/hello/EntityManager"
  id="entityManager" expected-type="javax.persistence.EntityManager" />

(https://github.com/sgilda/wildfly-quickstart/blob/master/greeter-spring/src/main/webapp/WEB-INF/spring-business-context.xml)