Defining EJB 3 Persistence Configuration

Chapter 9 Generating Persistent Objects for Java and JSF Pages

Defining EJB 3 Persistence Configuration

There are some persistence properties which are used for database connection. You need to set them before run the generated application.

To define EJB 3 persistence configuration parameters:

Open EJB 3 Persistence Configuration form from the model's property sheet.

Select persistence provider you use. You should refer to compliance issues for some constraints with these persistence providers.

3. Define JDBC driver class, connection URL, JDBC driver jar file path, user name and password.

Option	Description
Persistence provider	Specifies the persistence provider to be used.
Transaction type	Specifies the transaction type to be used.
Data source	Specifies the data source name (if data source is used).
Add Dali support	Specifies that the generated project can be authored in Dali. A special Eclipse project builder and nature will be generated.
JDBC driver class	Specifies the JDBC driver class.
Connection URL	Specifies the JDBC connection URL string.
JDBC driver jar	Specifies the JDBC driver jar file path.
User name	Specifies the database user name.
Password	Specifies the database user password.
Cascade persist	Specifies whether to set the cascade style to PERSIST for all relationships in the persistent unit.

You can verify the configuration parameters in the Preview tab. The generated persistence configuration file looks like:

<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="EJB3_0Model" transaction-type="RESOURCE_LOCAL">
      <description>
      This is auto generated configuration for persistent unit EJB3_0Model    
      </description>
<provider>org.hibernate.ejb.HibernatePersistence</provider>
      <!-- mapped files -->
      <!--jar-file/-->
      <!-- mapped classes -->      
      <class>com.company.orders.Customer</class>
      <class>com.company.orders.Order</class>
      <properties>
         <property name="hibernate.dialect">org.hibernate.dialect.SybaseDialect</property>
         <property name="hibernate.connection.driver_class">com.sybase.jdbc2.jdbc.SybDriver</property>
         <property name="hibernate.connection.url">jdbc:sybase:Tds:localhost:5000/Production</property>
         <property name="hibernate.connection.username">sa</property>
         <property name="hibernate.connection.password"></property>
      </properties>
   </persistence-unit>
</persistence>