I have used middlegen plugin for eclipse to generate mapping xml and java classes. But when im trying to write code to persist java class, its giving me error on hibernate.cfg.xml.

My entries of this xml are as follows

<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-2.0.dtd">
<hibernate-configuration>
<session-factory >
<property name="show_sql">true</property>
<mapping resource="org/ultimania/dto/Contact.hbm.xml"/>
<mapping resource="org/ultimania/dto/Person.hbm.xml"/>
<mapping resource="org/ultimania/dto/ContactMethod.hbm.xml"/>
<mapping resource="org/ultimania/dto/EntityType.hbm.xml"/>
<mapping resource="org/ultimania/dto/Gender.hbm.xml"/>
</session-factory>
</hibernate-configuration>

And java code is :

Configuration cfg = new Configuration()
.addClass(org.ultimania.dto.Contact.class)
.addClass(org.ultimania.dto.Person.class)
.addClass(org.ultimania.dto.ContactMethod.class)
.addClass(org.ultimania.dto.Gender.class)
.addClass(org.ultimania.dto.EntityType.class);

SessionFactory factory = cfg.configure().buildSessionFactory();
Session session = factory.openSession();
Transaction t = session.beginTransaction();
session.save(c);
t.commit();
session.close();

Please reply, and If you need to know anything i'll provide.
Thanx

///////////////////////// STACK TRACE //////////////////////////////////

log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: log\test.log (The system cannot find the path specified)
at java.io.FileOutputStream.openAppend(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
at org.apache.log4j.FileAppender.setFile(FileAppender.java:272)
at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:151)
at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:247)
at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:123)
at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:87)
at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:645)
at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:603)
at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:500)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:406)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:432)
at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:460)
at org.apache.log4j.LogManager.<clinit>(LogManager.java:113)
at org.apache.log4j.Logger.getLogger(Logger.java:85)
at org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:229)
at org.apache.commons.logging.impl.Log4JLogger.<init>(Log4JLogger.java:65)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
at net.sf.hibernate.cfg.Configuration.<clinit>(Configuration.java:95)
at org.ultimania.dto.Manager.main(Manager.java:30)
net.sf.hibernate.HibernateException: problem parsing configuration/hibernate.cfg.xml
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:972)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:911)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:897)
at org.ultimania.dto.Manager.main(Manager.java:37)
Caused by: net.sf.hibernate.MappingException: invalid configuration
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:968)
... 3 more
Caused by: org.xml.sax.SAXParseException: The content of element type "session-factory" is incomplete, it must match "(property*,mapping+,(class-cache|collection-cache|jcs-class-cache|jcs-collection-cache)*)".
at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.handleEndElement(Unknown Source)
at org.apache.xerces.impl.dtd.XMLDTDValidator.endElement(Unknown Source)
at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.dom4j.io.SAXReader.read(SAXReader.java:339)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:967)
... 3 more
Exception in thread "main"

Hello Ahsan



Remove these lines of code, the mapping is already declared in the hibernate.cfg.xml, the other mapping is unnecessary.

You also forgot to provide the basic settings, like database url, password, ...

You find examples in the manual, the docs.


Regards
Tarik

Thanks very much, Now this error has resolved but still a new error is there about JDBC. I think MiddlegeN deals with all Databse stuff then why is that?

////////////////////// STACK TRACE //////////////////////
java.lang.UnsupportedOperationException: The user must supply a JDBC connection
at net.sf.hibernate.connection.UserSuppliedConnectionProvider.getConnection(UserSuppliedConnectionProvider.java:32)
at net.sf.hibernate.impl.BatcherImpl.openConnection(BatcherImpl.java:292)
at net.sf.hibernate.impl.SessionImpl.connect(SessionImpl.java:3373)
at net.sf.hibernate.impl.SessionImpl.connection(SessionImpl.java:3333)
at net.sf.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:40)
at net.sf.hibernate.transaction.JDBCTransactionFactory.beginTransaction(JDBCTransactionFactory.java:19)
at net.sf.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:2252)
at org.ultimania.dto.Manager.main(Manager.java:36)

And if im removing

Transaction t = session.beginTransaction();

then JDBC Exception is not coming but this error is here. I duno why?


log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: log\test.log (The system cannot find the path specified)
at java.io.FileOutputStream.openAppend(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)

Thanx

Middlegen is not able to know to what database under which username/password it has to connect, this is that what is missing. So you either do that in hibernate.cfg.xml or you set it in the ant task as a property if you came from ant.

Regards
Tarik

Thanx,

Well For the time being Iv done it through Hibernate.properties file. But now problem is this that Im using FIREBIRD on backend. Everything is OK now.

But still even my code is persisting the object, after that its giving me an exception, plz tell me why is that?


//////////////////// STACK TRACE ////////////////////////////////////

log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: log\test.log (The system cannot find the path specified)
at java.io.FileOutputStream.openAppend(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
at org.apache.log4j.FileAppender.setFile(FileAppender.java:272)
at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:151)
at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:247)
at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:123)
at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:87)
at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:645)
at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:603)
at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:500)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:406)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:432)
at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:460)
at org.apache.log4j.LogManager.<clinit>(LogManager.java:113)
at org.apache.log4j.Logger.getLogger(Logger.java:85)
at org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:229)
at org.apache.commons.logging.impl.Log4JLogger.<init>(Log4JLogger.java:65)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
at net.sf.hibernate.cfg.Configuration.<clinit>(Configuration.java:95)
at org.ultimania.dto.Manager.main(Manager.java:30)

Thanx,

Log4J does not find the file test.log on the path log/test.log as stated in the message. So you should create a folder and a file as you have specified in the log4j.xml.

Regards
Tarik

Thank you very much Tarik,

Its working now, Im really gratefull. I was just testing Hibernate first time, As its working now, So Iv to develop complete persistence layer using hibernate and deploy over JBoss and I'll be in touch, in case of any problem. Thanx once again.

Wish u best of luck

You are welcome :-)

Regards
Tarik