Toplink Warning - how to stop logging?

Question

I'm just getting started with JPA and TopLink so I need a little help here.
Here's the situation. I want to build a simple Rich Client Application and have it use JPA for persistence. I am developing in NetBeans and using the built in Derby database for testing.
So I've got my Entities all set up and I've started writing a class that'll be using an EntityManager to handle the persistence. The first test I've done is working. However, every time I retrieve the EntityManager from my EntityManagerFactory and Toplink wants to create the tables for all the entities (and it realizes that they're already there), the Toplinks Logger prints this warning for every table:
+[TopLink Warning]: 2010.04.25 03:36:16.187--ServerSession(16795115)--Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.DatabaseException+
Internal Exception: java.sql.SQLException: Table/View '<table-name>' ist bereits in Schema '<schema-name>' vorhanden.
Error Code: -1
Call: CREATE TABLE <table-name> (ID BIGINT NOT NULL, MESSAGE VARCHAR(255), PRIMARY KEY (ID))
Query: DataModifyQuery()
I don't know why the warning is in German, but it means: Table/View ... already exists in ...
I've already tried to disable toplink-logging via persistence.xml which I've posted below. The warnings still show, though.
I've also tried to stop toplink wanting to create the tables by deleting the +<property name="toplink.ddl-generation" value="create-tables"/>+.
persistance.xml
+<?xml version="1.0" encoding="UTF-8"?>+
+<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="MovieDBv2.0PU" transaction-type="RESOURCE_LOCAL">+
+<provider>oracle.toplink.essentials.PersistenceProvider</provider>+
+<properties>+
+<property name="toplink.logging.level" value="OFF"/>+
+<property name="toplink.jdbc.user" value="admin"/>+
+<property name="toplink.jdbc.password" value="adminadmin"/>+
+<property name="toplink.jdbc.url" value="jdbc:derby://localhost:1527/movie_db1"/>+
+<property name="toplink.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver"/>+
+<property name="toplink.ddl-generation" value="create-tables"/>+
+</properties>+
+</persistence-unit>+
+</persistence>+
This is my persistence handling class DatabaseLink.java
package moviedbv20;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import moviedbv20.elements.DatabaseEntry;
+public class DatabaseLink {+
EntityManager em;
EntityManagerFactory emf;
+public DatabaseLink(){+
this.getEntityManager();
+}+
+public void getEntityManager (){+
+if (this.emf == null){+
this.emf = Persistence.createEntityManagerFactory("MovieDBv2.0PU");
+}+
+if(this.em == null){+
this.em = emf.createEntityManager();
+}+
+}+
+protected void createDatabaseEntry(DatabaseEntry entry){+
em.getTransaction().begin();
em.persist(entry);
em.getTransaction().commit();
+}+
+protected void editDatabaseEntry(DatabaseEntry entry) {+
em.merge(entry);
+}+
+protected void removeDatabaseEntry(DatabaseEntry entry){+
em.remove(em.merge(entry));
+}+
+protected DatabaseEntry findDatabaseEntry(Object id) {+
return em.find(DatabaseEntry.class, id);
+}+
+protected List<DatabaseEntry> findAllDatabaseEntries() {+
return em.createQuery("select object(o) from DatabaseEntry as o").getResultList();
+}+
+}+

Answer 1

Hi,
I tried with below persistence.xml using toplink essentials but with oracle database and seems everything working as expected.
<?xml version="1.0" encoding="Cp1252" ?>
<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="Project1">
<provider>oracle.toplink.essentials.PersistenceProvider</provider>
<jta-data-source>java:/app/jdbc/jdbc/Connection1DS</jta-data-source>
<class>project1.Dept</class>
<class>project1.Emp</class>
<properties>
<property name="toplink.target-server"
value="project1.WebLogicTransactionController"/>
<property name="toplink.logging.level" value="OFF"/>
<property name="toplink.logging.file" value="c:\jpatoplink.log"/>
<property name="toplink.target-database" value="Oracle"/>
<property name="toplink.ddl-generation" value="none"/>
</properties>
</persistence-unit>
</persistence>
As Eclipselink persistence provider is being the latest and preferred ,it is recommended to shift to eclipselink persistence provider from toplink essentials.
Regards,
Vinay