Hi,
Glassfish JPA is avaible for separate download from
https://glassfish.dev.java.net/downloads/persistence/JavaPersistence.html
I wonder Is there any tutorial for using glassfish jpa with Spring
2.0. BEA has a tutorial but It's for KODO and WebSphere.
Thanks in advance,
Regards,
Onur
On 4/17/06, Gordon Yorke <gordon.yorke_at_oracle.com> wrote:
> Hello,
> Currently only the javaee.jar file is available from glassfish. There are plans, however, to generate a separate bundle specifically for the persistence module which will contain the required java.persistence classes. I expect there to be an announcement on the Glassfish project pages when this is completed.
> The toplink-essentials-agent.jar is used to provide transparent lazy 1-1, m-1 support at runtime. Without using the javaagent option all 1-1 and m-1 will be eagerly loaded.
> Given the restrictions on the usage of the EMF defined in the specification (an application server is only allowed to create a single EMF for any PU, EMF.close closes allocated EMs) an application server would be required to maintain a reference to the EMF and use it on subsequent calls.
> --Gordon
>
> -----Original Message-----
> From: Marcel Overdijk [mailto:marceloverdijk_at_hotmail.com]
> Sent: Monday, April 17, 2006 6:52 AM
> To: persistence_at_glassfish.dev.java.net
> Subject: Some question regarding JPA
>
>
> Hi,
>
> I'm adding JPA support to a framework and have some questions.
> Currently I'm using the Toplink Essentials and javaee.jar from GlassFish M6.
>
> 1. The javaee.jar contains more then only the persistence related classes
> and therefor is 1mb big. Is there a official Sun jar downloadable containing
> only persistence classes. In Spring 2.0 distribution a persistence.jar
> (58kb) is included. I can use this but I don't know the origin of it.
>
> 2. In the persistence example on the GlassFish page the
> toplinks-essentials-agent.jar is used in combination with -javaagent (SE
> example). What does the toplink-essentials-agent do? If I just put
> toplink-essentials and javaee.jar on the classpath everything seems to work
> fine. Is there any drawback?
>
> 3. When I want to get an EntityManager based on an persistence unit Name I
> don't know at compile time. The only option (I believe) is to create an emf
> first:
> String pu = "some dynamic pu name";
> Persistence.createEntityManagerFactory(pu);
> However to create a emf each time is expensive. I could keep a reference to
> a pu once created.
> But what I'm wondering is how JEE 5 containers handle this. Do they create
> subsequent emf's or are they smart that they know it was already created in
> a previous call?
>
> Hope you can hekp me on this.
>
> Regards,
> Marcel Overdijk
>
>