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Java Persistence API and persistence.xml

From:
"Kenneth P. Turvey" <kt-usenet@squeakydolphin.com>
Newsgroups:
comp.lang.java.programmer
Date:
15 Mar 2008 22:43:08 GMT
Message-ID:
<47dc50fc$0$25217$ec3e2dad@news.usenetmonster.com>
I'm trying to work through the book "Pro EJB 3 - Java Persistence API"
(don't buy it), but I'm having some difficulty getting things to work
here. I'm just trying to use the derby embedded database and the
glassfish implementation of the JPA, as I think is being done in the book.
Unfortunately, I'm getting a stack trace when I try to run the code.

I have no idea what I'm doing with all this, so if you have any pointers,
I would greatly appreciate it. I don't know how this book is going to
help if I can't get the first example running.

Here's my persistence.xml file:

---
<?xml version="1.0" encoding="UTF-8"?>

<!--
    Document : persistence.xml.xml
    Created on : March 15, 2008, 4:27 PM
    Author : kt
    Description:
        Purpose of the document follows.
-->

<persistence>
    <persistence-unit name="EmployeeService" transaction-type="RESOURCE_LOCAL">
        <class>examples.model.Employee</class>
        <properties>
            <property name="toplink.jdbc.driver"
                      value="org.apache.derby.jdbc.EmbeddedDriver"/>
            <property name="toplink.jdbc.url"
                      value="jdbc:derby:MyTestDb;create=true"/>
            <property name="toplink.jdbc.user" value="APP" />
            <property name="toplink.jdbc.password" value="APP" />
        </properties>
    </persistence-unit>
</persistence>
----

Here's the one Entity

----
package javapersistence;

import javax.persistence.*;

@Entity
public class Employee {
    @Id private int id;
    private String name;
    private long salary;
    
    public Employee() {}
    public Employee(int id) { this.id = id; }
    
    public int getId() { return id; }
    public void setId(int id) { this.id = id; }
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public long getSalary() { return salary; }
    public void setSalary(long salary) { this.salary = salary; }
    
}
-----

And this is the stack trace I'm getting:

----
Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named EmployeeService: Provider named oracle.toplink.essentials.PersistenceProvider threw unexpected exception at create EntityManagerFactory:
oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Local Exception Stack:
Exception [TOPLINK-30005] (Oracle TopLink Essentials - 2.0 (Build b58g-fcs (09/07/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@17182c1
Internal Exception: Exception [TOPLINK-30004] (Oracle TopLink Essentials - 2.0 (Build b58g-fcs (09/07/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while processing persistence.xml from URL: file:/home/kt/git/Learning/JavaPersistence/build/classes/
Internal Exception:
(1. cvc-elt.1: Cannot find the declaration of element 'persistence'.)
        at oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:143)
        at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:169)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:110)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
        at javapersistence.EmployeeTest.main(EmployeeTest.java:18)
Caused by: Exception [TOPLINK-30004] (Oracle TopLink Essentials - 2.0 (Build b58g-fcs (09/07/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while processing persistence.xml from URL: file:/home/kt/git/Learning/JavaPersistence/build/classes/
Internal Exception:
(1. cvc-elt.1: Cannot find the declaration of element 'persistence'.)
        at oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException.exceptionProcessingPersistenceXML(PersistenceUnitLoadingException.java:134)
        at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processPersistenceXML(PersistenceUnitProcessor.java:161)
        at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processPersistenceArchive(PersistenceUnitProcessor.java:99)
        at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.getPersistenceUnits(PersistenceUnitProcessor.java:89)
        at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initPersistenceUnits(JavaSECMPInitializer.java:236)
        at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initialize(JavaSECMPInitializer.java:255)
        at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:155)
        ... 3 more
Caused by:
(1. cvc-elt.1: Cannot find the declaration of element 'persistence'.)
        at oracle.toplink.essentials.internal.ejb.cmp3.xml.parser.XMLExceptionHandler.error(XMLExceptionHandler.java:52)
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1887)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:685)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:400)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:626)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3088)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:914)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:647)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:508)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
        at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processPersistenceXML(PersistenceUnitProcessor.java:151)
        ... 8 more

Provider named oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider threw unexpected exception at create EntityManagerFactory:
oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Local Exception Stack:
Exception [TOPLINK-30005] (Oracle TopLink Essentials - 2.0 (Build b58g-fcs (09/07/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@17182c1
Internal Exception: Exception [TOPLINK-30004] (Oracle TopLink Essentials - 2.0 (Build b58g-fcs (09/07/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while processing persistence.xml from URL: file:/home/kt/git/Learning/JavaPersistence/build/classes/
Internal Exception:
(1. cvc-elt.1: Cannot find the declaration of element 'persistence'.)
        at oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:143)
        at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:169)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:110)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
        at javapersistence.EmployeeTest.main(EmployeeTest.java:18)
Caused by: Exception [TOPLINK-30004] (Oracle TopLink Essentials - 2.0 (Build b58g-fcs (09/07/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException
Exception Description: An exception was thrown while processing persistence.xml from URL: file:/home/kt/git/Learning/JavaPersistence/build/classes/
Internal Exception:
(1. cvc-elt.1: Cannot find the declaration of element 'persistence'.)
        at oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException.exceptionProcessingPersistenceXML(PersistenceUnitLoadingException.java:134)
        at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processPersistenceXML(PersistenceUnitProcessor.java:161)
        at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processPersistenceArchive(PersistenceUnitProcessor.java:99)
        at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.getPersistenceUnits(PersistenceUnitProcessor.java:89)
        at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initPersistenceUnits(JavaSECMPInitializer.java:236)
        at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initialize(JavaSECMPInitializer.java:255)
        at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:155)
        ... 3 more
Caused by:
(1. cvc-elt.1: Cannot find the declaration of element 'persistence'.)
        at oracle.toplink.essentials.internal.ejb.cmp3.xml.parser.XMLExceptionHandler.error(XMLExceptionHandler.java:52)
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1887)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:685)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:400)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:626)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3088)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:914)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:647)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:508)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
        at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processPersistenceXML(PersistenceUnitProcessor.java:151)
        ... 8 more

        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:154)
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
        at javapersistence.EmployeeTest.main(EmployeeTest.java:18)
----

--
Kenneth P. Turvey <kt-usenet@squeakydolphin.com>

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