GeeCON Prague 2014*
The moose likes Object Relational Mapping and the fly likes JPA + Glassfish + Netbeans+enity class + generate tables =( Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


JavaRanch » Java Forums » Databases » Object Relational Mapping
Bookmark "JPA + Glassfish + Netbeans+enity class + generate tables =(" Watch "JPA + Glassfish + Netbeans+enity class + generate tables =(" New topic
Author

JPA + Glassfish + Netbeans+enity class + generate tables =(

elizabeth Kent
Greenhorn

Joined: Jun 21, 2008
Posts: 1
I'm trying to generate database tables from annotated @entity classes for starters I'm just trying to generate anything:
1) I created a Derby database called DBtest.
2) I right clicked on the project and clicked 'new persistence unit'
3) under 'Data source' I clicked 'New Datasource'
4) jndi name : jdbc/testDB
Database Connection url: jdbc erby://localhost:1527/DBtest
persistence.xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">
<persistence-unit name="my_persistence_ctx">
<jta-data-source>jdbc/testDB</jta-data-source>
<properties>
<!--Use the java2db feature -->
<property name="toplink.ddl-generation" value="drop-and-create-tables"/>
<!-- Generate the sql specific to Derby database -->
<property name="toplink.platform.class.name"
value="oracle.toplink.essentials.platform.database.DerbyPlatform"/>
<property name="toplink.jdbc.user" value="test"/>
<property name="toplink.jdbc.password" value="test"/>
</properties>
</persistence-unit>
</persistence>

----------------------------------------------------------------------------

I have one entity class Person
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package com.entity;

import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

/**
*
* @author Administrator
*/
@Entity
public class Person implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;

public Long getId() {
return id;
}

public void setId(Long id) {
this.id = id;
}

@Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.hashCode() : 0);
return hash;
}

@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof Person)) {
return false;
}
Person other = (Person) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}

@Override
public String toString() {
return "com.entity.Person[id=" + id + "]";
}

}

---------------------------------------------------------------------------
I build and clean it, then deploy it to glassfish...and according to my understanding the table Person should be created...but nada . It deploys fine without an exception, but no table is created. In fact, if i change the name inside <jta-data-source> to garbage there are still no exceptions, and it deploys fine...this leads me to believe the JNDI name is not registered properly in Glassfish. I'm not sure, but it is driving me nuts.
Any help would be GREATLY appreciated. Thanks!
James Sutherland
Ranch Hand

Joined: Oct 01, 2007
Posts: 553
Odd that when you replace the datasource name with something invalid that you get no errors. Do you have logging on, and are you checking the correct log file?

In terms of creating the tables you may need to set the persistence property,
"toplink.ddl-generation.output-mode"="database"

To turn on logging you can set,
"toplink.logging.level"="finest"
"toplink.logging.logger"="DefaultLogger"


TopLink : EclipseLink : Book:Java Persistence : Blog:Java Persistence Performance
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: JPA + Glassfish + Netbeans+enity class + generate tables =(