3 Replies Latest reply: May 26, 2011 2:46 AM by jaikiran pai RSS

Configuring JBoss cache for EJB3 entities (JBoss-5.0.0.GA)

piotrekde Newbie

Hello,

 

My applications very often queries database for rarely-changed data. So I've decided to optimize it using cached EJB entities as desribed in:

http://docs.jboss.org/ejb3/docs/tutorial/1.0.7/html/Caching_EJB3_Entities.html

 

I've done everything in the same way, but additionaly I had to copy following JARs to common/lib (otherwise NoClassDefFound exception occurred):

hibernate-jbosscache2-3.3.3.GA.jar

jgroups-2.0.0.GA.jar

jbosscache-core-3.2.2.GA.jar

 

Now, when I try to start JBoss I can see the following stacktrace on the console:

 

(...)

Caused by: org.hibernate.cache.CacheException: Unable to retreive Cache from JNDI [java:CacheManager]

          at org.hibernate.cache.jbc2.builder.JndiMultiplexingCacheInstanceManager.locateCacheFactory(JndiMultiplexingCacheInstanceManager.java:88)

          at org.hibernate.cache.jbc2.builder.JndiMultiplexingCacheInstanceManager.start(JndiMultiplexingCacheInstanceManager.java:72)

          at org.hibernate.cache.jbc2.JBossCacheRegionFactory.start(JBossCacheRegionFactory.java:106)

          at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:215)

          at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1327)

          at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867)

          at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)

          ... 51 more

 

 

I have to believe it, probably there is no CacheManager in the JNDI tree , but I still don't know what to do. There is nothing about additional JNDI configuration in the document I've pasted (and in the other articles I browsed).

 

Thanks in advance, any help is appreciated.

Piotr

 

(unfortunately I cannot upgrade my JBoss version)

  • 1. Re: Configuring JBoss cache for EJB3 entities (JBoss-5.0.0.GA)
    piotrekde Newbie

    It was my fault...  I tried to use cache from JBoss server configuration without cache available (default). In order to do not run whole 'all' server configuration, I've copied following fies/directories from 'all' to 'default':

    deploy/cluster

    lib/jgroups.jar

    lib/hibernate-jbosscache2.jar

    lib/jbosscache-core.jar

    lib/jbosscache-pojo.jar

    deploy-hasinleton

     

    Now server starts without errors, however when I take a look at hibernate sql logs I can still see the same number of queries hitting database as without cache configured. Here is my persistence.xml file:

     

     

    <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="mydb">
                        <jta-data-source>java:/myds</jta-data-source>
    
                            (...) classes definitions
                        <class>com.my.class.MyEntityOne</class>
                            (...)
    
                        <properties>
                                  <property name="hibernate.show_sql" value="true" />
                                  <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
                                  <property name="hibernate.format_sql" value="false" />
                                  <property name="hibernate.hbm2ddl.auto" value="update"/>
                                  <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
                                  <property name="hibernate.transaction.factory_class" value="org.hibernate.ejb.transaction.JoinableCMTTransactionFactory"/>
    
    
                                    <!-- 2nd level cache -->                                       
                                    <property name="hibernate.cache.use_second_level_cache" value="true"/>
                                    <property name="hibernate.cache.use_query_cache" value="true"/>
                                    <property name="hibernate.cache.region.factory_class" value="org.hibernate.cache.jbc2.JndiMultiplexedJBossCacheRegionFactory"/>
                                    <property name="hibernate.cache.region.jbc2.cachefactory" value="java:CacheManager"/>
                                    <property name="hibernate.cache.region.jbc2.cfg.entity" value="mvcc-entity"/>
                                    <property name="hibernate.cache.region.jbc2.cfg.query" value="local-query"/>
                        </properties>
              </persistence-unit>
    </persistence>
    
    

     

     

    Also, all my entities are annotated with:

    @Cache (usage=CacheConcurrencyStrategy.TRANSACTIONAL)

     

     

     

    Should I do some additional setup?

    Maybe a little hint will be that when I shut down server the following exception can be seen in logs:

     

     

    org.hibernate.cache.CacheException: java.lang.IllegalStateException: Cache not in STARTED state!

              at org.hibernate.cache.jbc2.BasicRegionAdapter.destroy(BasicRegionAdapter.java:243)

              at org.hibernate.impl.SessionFactoryImpl.close(SessionFactoryImpl.java:813)

              at org.hibernate.ejb.EntityManagerFactoryImpl.close(EntityManagerFactoryImpl.java:46)

              at org.jboss.jpa.deployment.ManagedEntityManagerFactory.destroy(ManagedEntityManagerFactory.java:93)

              at org.jboss.jpa.deployment.PersistenceUnitDeployment.stop(PersistenceUnitDeployment.java:343)

              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

              at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

              at java.lang.reflect.Method.invoke(Method.java:597)

     

     

     

    Thanks,

    Piotr

  • 2. Re: Configuring JBoss cache for EJB3 entities (JBoss-5.0.0.GA)
    piotrekde Newbie

    It seems that query caching and entity caching are quite distinct.

     

    Queries has to explicitly state that they want to be cached:

     

    Query query = manager.createQuery("SELECT i FROM ..");
    query.setHint("org.hibernate.cacheable", true);
    

     

    For entities, in my case (I don't know if it's a general rule) it was not enough to annotate classes with @Cache at the top, but also include this annotation on every field that refers to other cached entity, for example:

     

     

    @Cache (usage=CacheConcurrencyStrategy.TRANSACTIONAL)
    @Entity
    public class EntityA {
      @Cache (usage=CacheConcurrencyStrategy.TRANSACTIONAL)
      private Set<EntityB> entitiesB;
    }
    
    @Cache (usage=CacheConcurrencyStrategy.TRANSACTIONAL)
    @Entity
    public class EntityB {
    }
    

     

    As I mentioned, it may be not a general rule about caching entities, but in my case, after I've added these annotations on fields-level everything started to work as expected.

  • 3. Re: Configuring JBoss cache for EJB3 entities (JBoss-5.0.0.GA)
    jaikiran pai Master

    piotrekde wrote:

     

    It seems that query caching and entity caching are quite distinct.

     

    Yes, they are different things. This is a good read http://www.javalobby.org/java/forums/t48846.html to understand what each one does.