import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;

@Entity
@Table(name = "\"cluster_node\"")
@NamedQueries(value = {@NamedQuery(name = "clusternodesnames", query = "select o from ClusterNode o where o.cluster_name=:u")})
public class ClusterNode implements Serializable 
{
    @Column(name="cluster_name", nullable = false)
    private String cluster_name;
    
    @Id
    @GeneratedValue
    @Column(name="idd", nullable = false)    
    private int idd; 
        
    @Column(name="nnode", nullable = false)
    private String nnode;

    public ClusterNode()
    {
    }

    public ClusterNode(String cluster_name, String nnode)
    {
        this.cluster_name = cluster_name;
        this.nnode = nnode;
    }

    public int getIdd()
    {
        return idd;
    }
    
    public void setIdd(int idd) 
    {
        this.idd = idd;
    }
    
    public String getCluster_name()
    {
        return cluster_name;
    }

    public void setCluster_name(String cluster_name) 
    {
        this.cluster_name = cluster_name;
    }

    public String getNnode() 
    {
        return nnode;
    }

    public void setNnode(String nnode) 
    {
        this.nnode = nnode;
    }
}

<?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="ForumUniut" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <jta-data-source>java:/app/jdbc/jdbc/mysqlDS</jta-data-source>
    <class>com.zixi.model.entity.Person</class>
    <class>com.zixi.model.entity.Cluster</class>
    <class>com.zixi.model.entity.ClusterNode</class>
    <properties>
      <property name="eclipselink.target-server" value="WebLogic_10"/>
      <property name="javax.persistence.jdbc.driver"
                value="com.mysql.jdbc.Driver"/>
      <property name="javax.persistence.jdbc.password"
                value="174E85C27BF7E1BC242BA3A4195B44E8"/>
      <property name="javax.persistence.jdbc.url"
                value="jdbc:mysql://10.7.0.175:3306/br"/>
      <property name="javax.persistence.jdbc.user" value="weblogic"/>
      <property name="javax.persistence.jtaDataSource"
                value="java:/app/jdbc/jdbc/mysqlDS"/>
      <property name="eclipselink.logging.level" value="FINE"/>
      <property name="eclipselink.logging.logger"
                value="org.eclipse.persistence.logging.DefaultSessionLog"/>
      <property name="eclipselink.session.include.descriptor.queries"
                value="true"/>
      <property name="eclipselink.temporal.mutable" value="true"/>
      <property name="eclipselink.validate-existence" value="true"/>
      <property name="eclipselink.allow-zero-id" value="true"/>
      <property name="eclipselink.transaction.join-existing" value="true"/>
      <property name="eclipselink.persistence-context.close-on-commit"
                value="true"/>
      <property name="eclipselink.persistence-context.persist-on-commit"
                value="true"/>
    </properties>
  </persistence-unit>
</persistence>

    public ClusterNode persistClusterNode(ClusterNode clusterNode) 
    {
        System.out.println("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^");   
        em.persist(clusterNode);
        System.out.println(clusterNode.getCluster_name() + "  " + clusterNode.getNnode() + " test");
        System.out.println("******************************************************************************");
        return clusterNode;
    }