MG>quick example where persistence.xml is located at
MG>$GLASSFISH/SEAM/seampagination/seampagination-ejb/src/conf/persistence.xml
MG>contents are
<persistence version="1.0" xmlns="
http://java.sun.com/xml/ns/persistence" xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="
http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="PetCatalogPu" transaction-type="JTA">
<jta-data-source>jdbc/PETCatalogDB</jta-data-source>
<properties/>
</persistence-unit>
</persistence>
//$GLASSFISH/SEAM/bp-sessionpagination/bp-sessionpagination-ejb/setup.xml contents
<target name="create-resource-local" depends="tools,create-pool-local">
<echo message="Registering jdbc resource jdbc/PETCatalogDB."/>
<antcall target="create-jdbc-resource">
<param name="pool.name" value="PETCatalogPool" />
<param name="jdbc.resource.name" value="jdbc/PETCatalogDB" />
</antcall>
</target>
//$GLASSISH_HOME/bp-sessionpagination/bp-sessionpagination-ejb/setup/CatalogPool.sun-//resource contents:
<?xml version="1.0" encoding="UTF-8"?>
<resources>
<jdbc-connection-pool allow-non-component-callers="false" connection-validation-method="auto-commit" datasource-classname="org.apache.derby.jdbc.ClientDataSource" fail-all-connections="false" idle-timeout-in-seconds="300" is-connection-validation-required="false" is-isolation-level-guaranteed="true" max-pool-size="32" max-wait-time-in-millis="60000" name="PETCatalogPool" non-transactional-connections="false" pool-resize-quantity="2" res-type="javax.sql.DataSource" steady-pool-size="8" validation-table-name="TAB_NAME">
<property name="serverName" value="localhost"/>
<property name="PortNumber" value="1527"/>
<property name="DatabaseName" value="pet-catalog"/>
<property name="User" value="app"/>
<property name="Password" value="app"/>
</jdbc-connection-pool>
</resources>
//code for Catalog Bean
@Stateless
public class CatalogFacadeBean implements CatalogFacade {
//this will reference the unit name defined in Persistence.xml as PetCatalogPU
@PersistenceContext(unitName="PetCatalogPu")
private EntityManager em;
public Item getItem(String itemID){
//use the Persistence context to locate itemID
Item item = em.find(Item.class,itemID);
return item;
}
public Category getCategory(String id){
//use the Persistence context to locate 'id'
Category category = em.find(Category.class,id);
return category;
}
//code for Item (the query needs the jdbc/PETCatalogDB to ref the DB Item table)
@Entity
@Table(name = "ITEM")
@NamedQueries( {
@NamedQuery(name = "Item.findByItemid", query = "SELECT i FROM Item i WHERE i.itemid = :itemid"),
@NamedQuery(name = "Item.findByName", query = "SELECT i FROM Item i WHERE i.name = :name")
})
public class Item implements Serializable .....
HTH
Martin Gainty
______________________________________________
Jogi és Bizalmassági kinyilatkoztatás/Verzicht und Vertraulichkeitanmerkung/Note de déni et de confidentialité
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> Date: Fri, 12 Jun 2009 10:41:09 -0700
> From: Marina.Vatkina_at_Sun.COM
> To: users_at_glassfish.dev.java.net
> Subject: Re: No Persistence provider for EntityManager!!!!
>
> You might want to read the corresponding chapters in the Java EE 5 Tutorial.
>
> I think you are mixing 2 setups - your persistence.xml specifies the datasource,
> i.e. you are running in a environment where you can do a lookup. Is it true? If
> yes, you should be looking up the EntityManagerFactory, not creating it yourself.
>
> How does the EnterpriseApplication1-war refer to the EnterpriseApplication1-ejb?
> Where is the persistence.xml located?
>
> Regards,
> -marina
>
> glassfish_at_javadesktop.org wrote:
> > Sorry I don't understand. To recap, what I have done is as follows;
> > [b]1. netbeans project [/b]
> > I have created a netbeans Enterprise Application that consists of the following;
> > a. EnterpriseApplication1-ejb : Contains an Entity class called Products and a DBAO to access a mySQL database
> > b. EnterpriseApplication1-war : Contains a Web Service that calls logic contained in a.)
> >
> > In terms of classpath, I have the following setup;
> > .;%JAVA_HOME%\bin;%JRE_HOME\bin;C:\Program Files\Java\jre6\lib\ext\QTJava.zip;C:\Program Files\NetBeans 6.5\java2\modules\ext\hibernate;
> >
> > [b]2. Persistence.xml [/b]
> > The persistence.xml file looks as follows;
> >
> > <persistence-unit name="productsPU">
> > <jta-data-source>depotDB</jta-data-source>
> > <class>org.rich.entities.Products</class>
> > <exclude-unlisted-classes>true</exclude-unlisted-classes>
> > <properties/>
> > </persistence-unit>
> >
> > depotDB refers to a data source that accesses a mySQL database. When I go under the covers in netbeans, persistence.xml seems to be in the right place.
> >
> > [b]3. DBAO Products[/b]
> > In my database access class, I have the following code
> >
> > EntityManagerFactory emf = Persistence.createEntityManagerFactory("productsPU");
> >
> > EntityManager em = emf.createEntityManager();
> >
> > [b]4. The Result[/b]
> > When I run the application, I get the following;
> >
> > Caused by: javax.persistence.PersistenceException: No Persistence provider for EntityManager named productsPU: The following providers:
> > oracle.toplink.essentials.PersistenceProvider
> > oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider
> > Returned null to createEntityManagerFactory.
> >
> >
> > As I am relatively new to using netbeans, glassfish and the JPA, I have absolutely no idea what is going on. Sadly, I've spent about 8 hours trying to debug to no avail.
> >
> > Any pointers would be much appreciated.
> > [Message sent by forum member 'rwwebb' (rwwebb)]
> >
> > http://forums.java.net/jive/thread.jspa?messageID=350865
> >
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> >
>
>
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