Hibernate help

chowfar · **Joined:** Thu Dec 21, 2006 2:03 pm **Posts:** 7

I am trying to write some data to the database using hibernate. I get the following error:

Dec 21, 2006 12:09:42 PM org.hibernate.cfg.Environment <clinit>
INFO: using JDK 1.4 java.sql.Timestamp handling
Dec 21, 2006 12:09:42 PM org.hibernate.cfg.Configuration configure
INFO: configuring from resource: /hibernate.cfg.xml
Dec 21, 2006 12:09:42 PM org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: Configuration resource: /hibernate.cfg.xml
An AnnotationConfiguration instance is required to use <mapping clazz="com.marketecho.mecap.Users"/>
Exception in thread "main" java.lang.NullPointerException
at com.marketecho.mecap.WritingRecord.main(WritingRecord.java:39)

My code is following:

package com.marketecho.mecap;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class WritingRecord {
public static void main(String[] args) {
Session session = null;

try {
// This step will read hibernate.cfg.xml and prepare hibernate for use

SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
session = sessionFactory.openSession();
org.hibernate.Transaction tx = session.beginTransaction();

//Create new instance of Contact and set values in it by reading them from form object
System.out.println("Inserting Record");
Customer cust = new Customer();
cust.setCustomerId(3457);
cust.setCustomerFName("Deepak");
cust.setCustomerLName("Kumar");
cust.setEmail("deepak_38@yahoo.com");
session.save(cust);
tx.commit();
System.out.println("Done");

}
catch(Exception e) {
System.out.println(e.getMessage());

}

finally {
// Actual contact insertion will happen at this step
session.flush();
session.close();
}
}
}

----------
After SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
It catches exception prints out the following line
An AnnotationConfiguration instance is required to use <mapping clazz="com.marketecho.mecap.Users"/>
Then since session is null, it gets null pointer excepetion at
line session.flush();

Any suggestion what can I do?

batmat · **Posted:** Thu Dec 21, 2006 3:16 pm

How did you map your Persistent class? With hbm.xml files or with annotations? If you're using annotations, I guess you didn't specify correctly the mapped class inside your hibernate.cfg.xml file. Can you post the content of this file here?

sneal · **Posted:** Thu Dec 21, 2006 3:20 pm

If you are using annotated classes then you should use the AnnotationConfiguration class instead. Something like:

Code:

SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory(); 

chowfar · **Joined:** Thu Dec 21, 2006 2:03 pm **Posts:** 7

Now I use the following code

package com.marketecho.mecap;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.*;

public class WritingRecord {
public static void main(String[] args) {
Session session = null;

try {
// This step will read hibernate.cfg.xml and prepare hibernate for use

SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();
session = sessionFactory.openSession();
org.hibernate.Transaction tx = session.beginTransaction();

//Create new instance of Contact and set values in it by reading them from form object
System.out.println("Inserting Record");
Customer cust = new Customer();
cust.setCustomerId(3457);
cust.setCustomerFName("Deepak");
cust.setCustomerLName("Kumar");
cust.setEmail("deepak_38@yahoo.com");
session.save(cust);
tx.commit();
System.out.println("Done");

}
catch(Exception e) {
System.out.println(e.getMessage());

}

finally {
// Actual contact insertion will happen at this step
session.flush();
session.close();
}
}
}

I get the following error:

Dec 21, 2006 1:34:33 PM org.hibernate.cfg.Environment <clinit>
INFO: Hibernate 3.0.5
Dec 21, 2006 1:34:33 PM org.hibernate.cfg.Environment <clinit>
INFO: loaded properties from resource hibernate.properties: {hibernate.connection.username=root, hibernate.connection.password=****, hibernate.cglib.use_reflection_optimizer=true, hibernate.dialect=org.hibernate.dialect.MySQLDialect, hibernate.connection.url=jdbc:mysql://localhost/mecap, hibernate.connection.driver_class=org.gjt.mm.mysql.Driver}
Dec 21, 2006 1:34:33 PM org.hibernate.cfg.Environment <clinit>
INFO: using CGLIB reflection optimizer
Dec 21, 2006 1:34:33 PM org.hibernate.cfg.Environment <clinit>
INFO: using JDK 1.4 java.sql.Timestamp handling
Dec 21, 2006 1:34:33 PM org.hibernate.cfg.Configuration configure
INFO: configuring from resource: /hibernate.cfg.xml
Dec 21, 2006 1:34:33 PM org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: Configuration resource: /hibernate.cfg.xml
Dec 21, 2006 1:34:34 PM org.hibernate.cfg.Configuration doConfigure
INFO: Configured SessionFactory: null
Exception in thread "main" java.lang.NullPointerException
at com.marketecho.mecap.WritingRecord.main(WritingRecord.java:39)

-----------
Still INFO: Configured SessionFactory: null

chowfar · **Joined:** Thu Dec 21, 2006 2:03 pm **Posts:** 7

My hibernate.cfg.xml is below

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.bytecode.use_reflection_optimizer">false</property>
<property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>
<property name="hibernate.connection.password">password</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost/mecap</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<mapping class="com.marketecho.mecap.Users" />
.................
</session-factory>
</hibernate-configuration>

sneal · **Posted:** Thu Dec 21, 2006 5:42 pm

I guess you don't need to call configure() for AnnotationConfiguration. Here's an example from the docs:

Code:

public class HibernateUtil {

private static final SessionFactory sessionFactory;

    static {
        try {

            sessionFactory = new AnnotationConfiguration().buildSessionFactory();
        } catch (Throwable ex) {
            // Log exception!
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static Session getSession()
            throws HibernateException {
        return sessionFactory.openSession();
    }
}

Javier Martinez · **Posted:** Thu Dec 21, 2006 5:46 pm

Hi,

But I need the Users.hbm.xml or the POJO Users with Annotations. Can you provide that code (Users.java or Users.hmb.xml)?

Regards.

chowfar · **Joined:** Thu Dec 21, 2006 2:03 pm **Posts:** 7

After I added AnnotationConfigure(). It is not giving me any annotationinstance error. So it probably has nothing to do with
any particular file like Users.

I tried without .configure(), but it does not help. It does not configure at all. So when I tried with AnnotationConfigure().configure() it gives the following error
Dec 21, 2006 4:14:09 PM org.hibernate.cfg.Configuration configure
INFO: configuring from resource: /hibernate.cfg.xml
Dec 21, 2006 4:14:09 PM org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: Configuration resource: /hibernate.cfg.xml
Dec 21, 2006 4:14:09 PM org.hibernate.cfg.Configuration doConfigure
INFO: Configured SessionFactory: null

So some reason it is having problem building sessionfactory.

batmat · **Posted:** Thu Dec 21, 2006 6:34 pm

Maybe you should try and add log4j in the classpath and activate the logs at a lower level (debug, say). You would certainly have more infos on what's going on...

chowfar · **Joined:** Thu Dec 21, 2006 2:03 pm **Posts:** 7

I put the statement out of try block
SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory();

Then I get the following error

Dec 21, 2006 5:01:31 PM org.hibernate.cfg.Configuration doConfigure
INFO: Configured SessionFactory: null
Dec 21, 2006 5:01:31 PM org.hibernate.cfg.AnnotationBinder bindClass
INFO: Binding entity from annotated class: com.marketecho.mecap.Users
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/collections/SequencedHashMap
at org.hibernate.mapping.Table.<init>(Table.java:33)
at org.hibernate.cfg.Mappings.addTable(Mappings.java:165)
at org.hibernate.cfg.annotations.TableBinder.fillTable(TableBinder.java:132)
at org.hibernate.cfg.annotations.EntityBinder.bindTable(EntityBinder.java:368)
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:537)
at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:452)
at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:268)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1283)
at com.marketecho.mecap.WritingRecord.main(WritingRecord.java:12)

batmat · **Posted:** Fri Dec 22, 2006 3:06 am

You're just missing one jar (and maybe some others). Where did you get you hibernate archive?

Normally, there's a lib directory. You should put every jars inside in your classpath.

Here, it seems like you're missing the commons-collections jar : http://jakarta.apache.org/commons/collections/

chowfar · **Joined:** Thu Dec 21, 2006 2:03 pm **Posts:** 7

After I added common collections jar and mysql connector jar file I am getting different error. The following error is

Dec 22, 2006 8:47:28 AM org.hibernate.impl.SessionFactoryImpl <init>
INFO: building session factory
Exception in thread "main" java.lang.NoClassDefFoundError: net/sf/cglib/proxy/CallbackFilter
at org.hibernate.bytecode.cglib.BytecodeProviderImpl.getProxyFactoryFactory(BytecodeProviderImpl.java:33)
at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactoryInternal(PojoEntityTuplizer.java:182)
at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:160)
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:269)
at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:425)
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:1291)
at com.marketecho.mecap.WritingRecord.main(WritingRecord.java:12)

batmat · **Posted:** Fri Dec 22, 2006 11:27 am

Well, now you seem to be missing cglib...

chowfar · **Joined:** Thu Dec 21, 2006 2:03 pm **Posts:** 7

Now I am getting the following error

Dec 22, 2006 9:30:55 AM org.hibernate.impl.SessionFactoryObjectFactory addInstance
INFO: Not binding factory to JNDI, no JNDI name configured

Do I need to include something like
<property name="connection.datasource"> in hibernate.cfg.xml file.

batmat · **Posted:** Fri Dec 22, 2006 12:34 pm

It's not an error. It's just saying it won't bind to jndi. Is there any "other" error message else?