[Andy Ghosh]

Hi,
I am testing a very simple application involving EJB3 annotations and persistenace out of container.

I am listing the entity class, client class and the persistence file and the exception I am getting. The persistence.xml is located in the project META-INF directory.

Any help is appreciated!
Thanks
Andy

Entity Class

package com.andy.ejb3;

import javax.persistence.Entity;
import javax.persistence.EntityManager;
import javax.persistence.Id;

@Entity
public class Book {

    
    @Id
    private int book_id;

    public Book() {
    }

    protected EntityManager em;
    private String book_name;
    private int publisher_id;

    
    public Book(EntityManager em){
        this.em=em;
    }
    
    
}

And I created a persistence.xml like this:

<?xml version="1.0" encoding="UTF-8"?> 
<persistence xmlns="http://java.sun.com/xml/ns/persistence" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence 
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0"> 
<persistence-unit name="Book" transaction-type="RESOURCE_LOCAL"> 
<provider>oracle.toplink.essentials.PersistenceProvider</provider> 
<class>com.andy.ejb3.Book</class> 
<properties> 
<property name = "toplink.jdbc.driver" value = "com.mysql.jdbc.Driver"/> 
<property name = "toplink.jdbc.url" value = "jdbc:mysql://127.0.0.1:3306/test"/> 
<property name = "toplink.jdbc.user" value = "root"/> 
<property name = "toplink.jdbc.password" value = "root"/> 
</properties> 
</persistence-unit> 
</persistence> 

Finally I have client code like this:

EntityManagerFactory emf =
               Persistence.createEntityManagerFactory("Book");
               EntityManager em = emf.createEntityManager();
               Book svc=new Book(em);
               em.getTransaction().begin();
               
               Book b=svc.CreateBook(999, "Exorcist", 876);
               
               em.getTransaction().commit();

I am getting an exception:

Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named Book
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:89)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)
    at com.andy.ejb3.MyBeanClient.main(MyBeanClient.java:27)

[Andy Ghosh]

Never mind, it was a classpath issue with the entity manager provider. Thanks

[Author]

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