|
Hi Friend i am facing problem in fetch records that why i join this forum.
my problem is that i having database around 800 tables and i generate hbm and Pojo using Hibernate reverse Engineering wizard.that tool generate mapping file and pojo fine.but when i am testing it give 's error on building session factory.the error is:-
17:03:22,011 INFO SessionFactoryImpl:161 - building session factory
Initial SessionFactory creation failed.java.lang.OutOfMemoryError: Java heap space
Exception in thread "main" java.lang.ExceptionInInitializerError
at com.factory.HibernateUtil.buildSessionFactory(HibernateUtil.java:17)
at com.factory.HibernateUtil.<clinit>(HibernateUtil.java:6)
at com.factory.First.main(First.java:32)
Caused by: java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOfRange(Arrays.java:3209)
at java.lang.String.<init>(String.java:216)
at org.objectweb.asm.Type.getInternalName(Unknown Source)
at net.sf.cglib.core.CodeEmitter.emit_field(CodeEmitter.java:468)
at net.sf.cglib.core.CodeEmitter.getfield(CodeEmitter.java:425)
at net.sf.cglib.proxy.Enhancer$6.beginMethod(Enhancer.java:924)
at net.sf.cglib.proxy.InvocationHandlerGenerator.generate(InvocationHandlerGenerator.java:42)
at net.sf.cglib.proxy.Enhancer.emitMethods(Enhancer.java:942)
at net.sf.cglib.proxy.Enhancer.generateClass(Enhancer.java:498)
at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)
at net.sf.cglib.proxy.Enhancer.createClass(Enhancer.java:317)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:127)
at org.hibernate.proxy.pojo.cglib.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:43)
at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:162)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:135)
at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:55)
at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.<init>(EntityEntityModeToTuplizerMapping.java:56)
at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:295)
at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:434)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:109)
at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:226)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1294)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)
at com.factory.HibernateUtil.buildSessionFactory(HibernateUtil.java:11)
... 2 more
17:04:12,283 INFO DriverManagerConnectionProvider:147 - cleaning up connection pool: jdbc:mysql://localhost:3306/enze-db
so i increase a size of eclipse heap then the result will same......some time its run but it giving out put very slowly.........
my session factory code is:-
public class HibernateUtil {
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
try {
// Create the SessionFactory from hibernate.cfg.xml
return new AnnotationConfiguration().configure().buildSessionFactory();
}
catch (Throwable ex) {
// Make sure you log the exception, as it might be swallowed
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
public static void shutdown() {
// Close caches and connection pools
getSessionFactory().close();
}
}
and my testing class code is :-public class First {
public static void main(String[] args) {
SessionFactory sf=HibernateUtil.getSessionFactory();
Statistics st=sf.getStatistics();
st.setStatisticsEnabled(true);
Session session = sf.openSession();
try
{
String QUERY="from AccommodationClass a where a.accommodationClassId='001'";
Query query =session.createQuery(QUERY).setCacheable(true);
List l =query.list();
System.out.println("QUERY EXECUTION TIME :----->"+st.getQueryExecutionMaxTime());
System.out.println("Collection FETCH Count :------>"+st.getCollectionFetchCount());
System.out.println("Collection LOAD Count :-------> "+st.getCollectionLoadCount());
System.out.println("Connect Count :-------> "+st.getConnectCount());
System.out.println(":Entiry-------> "+st.getEntityLoadCount());
System.out.println("===>"+l);
} catch (HibernateException e) {
e.printStackTrace();
session.flush();
session.clear();
session.close();
} finally {
session.flush();
session.clear();
session.close();
}
}
}
plz give me sol..........iam using hibernate 3.2 and Annotations.
Thanks
AMit
|
Login
FAQ
Search