You build probably moves/copies things around - persistence.xml is expected to
be in the META-INF directory.
Regards,
-marina
Martin Gainty wrote:
> 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
> ______________________________________________
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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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