Hi Tom,
How I can create multiple versions of my persistence unit? with physical
files? I can't do that because I must connect with a lot of data base.
Daniel Benítez.
--------------------------------------------------
From: "Tom Ware" <tom.ware_at_oracle.com>
Sent: Friday, July 04, 2008 3:28 PM
To: <persistence_at_glassfish.dev.java.net>
Subject: Re: two connections with a persistence unity
> Hi Daniel,
>
> At the moment, TopLink Essentials does not support using connections
> that are defined differently within the same EntityManagerFactory. Here
> is the Issue Tracker issue that tracks this feature request:
>
> https://glassfish.dev.java.net/issues/show_bug.cgi?id=1575
>
> The workaround is to create multiple versions of your persistence unit
> and use different login information for each.
>
> -Tom
>
> Daniel Benítez wrote:
>> Hey everybody, We need help!!!
>>
>> For a connection with a Derby data base we are using a glassfish
>> persistence unit. For that, we have created that persistence unit through
>> Netbeans and with:
>>
>> protected EntityManager em;
>> private static EntityManagerFactory emf;
>>
>> Properties databaseProperties = new Properties();
>>
>> databaseProperties.setProperty(oracle.toplink.essentials.config.TopLinkProperties.JDBC_URL,
>> jdbcUrl);
>>
>> databaseProperties.setProperty(oracle.toplink.essentials.config.TopLinkProperties.JDBC_DRIVER,
>> "org.apache.derby.jdbc.ClientDriver");
>>
>> databaseProperties.setProperty(oracle.toplink.essentials.config.TopLinkProperties.JDBC_USER,
>> Usuario);
>>
>> databaseProperties.setProperty(oracle.toplink.essentials.config.TopLinkProperties.JDBC_PASSWORD,
>> Contrasenya);
>>
>> emf = Persistence.createEntityManagerFactory(Manejador,
>> databaseProperties);
>> em = emf.createEntityManager( );
>>
>> as a code.
>>
>> The problem is that when we want to change the initial data base (using
>> for that, destroy funtion (
>>
>> public void destruir(){
>> em.clear();
>> em.close();
>> em = null;
>> emf.close();
>> //emf = null;
>> }
>>
>> ) eliminating the class and establishing a new
>> connection for this new data base ¡we always obtain a connection with
>> the
>> initial data base!!!
>>
>> What are we doing wrongly ?
>>
>> Is it possible to connect an unique persistence unit to different data
>> base? How?
>>
>> Thanks very much for the help
>