I am trying to implement second-level cache on my application, but it returns following error. I am suspicious to the setCacheMode.
Hibernate.cfg.xml
...
<property name="cache.provider_class">
org.hibernate.cache.EhCacheProvider
</property>
<property name="hibernate.cache.use_query_cache">true</property>
...
Product.Java
public class Product implements Serializable {
...
@Id
@GeneratedValue
@Column(name = "id")
@Cache(usage= CacheConcurrencyStrategy.READ_ONLY)
public long getID() {
return ID;
}
...
}
Model.Java
....
final Session session = HibernateUtil.getSession();
try {
final Transaction tx = session.beginTransaction();
try {
Product product = (Product) session.get(Product.class, id);
session.setCacheMode(CacheMode.NORMAL);
tx.commit();
return product;
} catch (Exception e) {
tx.rollback();
e.printStackTrace();
}
} finally {
HibernateUtil.closeSession();
}
.....
Error
INFO: ** Exception in SessionFactory **
SEVERE: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.spi.CacheImplementor]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:186)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:150)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:264)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1760)
at com.my.util.HibernateUtil.configureSessionFactory(HibernateUtil.java:26)
at com.my.util.HibernateUtil.<clinit>(HibernateUtil.java:43)
at com.my.controller.Default.execute(Default.java:29)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:446)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:285)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
at
.....
Util
private static SessionFactory configureSessionFactory() {
try {
Configuration configuration = new Configuration();
configuration.configure();
serviceRegistry = new
ServiceRegistryBuilder()
.applySettings(configuration.getProperties())
.buildServiceRegistry();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
return sessionFactory;
} catch (HibernateException e) {
System.out.append("** Exception in SessionFactory **");
e.printStackTrace();
}
return sessionFactory;
}
If you use hibernate version higher than 3.3, you need use this properties
<property name="hibernate.cache.region.factory_class">
org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory
</property>
and add dependancy to maven
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-ehcache</artifactId>
<version>${hibernate-core.version}</version>
</dependency>
and then you use Product product = (Product) session.get(Product.class, id); this will be second level cache(if session is close), not query.
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