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From: Michael Simons <Michael.Simons@Optitool.DE>
To: "user@geronimo.apache.org" <user@geronimo.apache.org>
Date: Tue, 1 Mar 2011 09:54:23 +0100
Subject: AW: I need to pick your brains....
Thread-Topic: I need to pick your brains....
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Hi Neil,

We faced a similar situation like you a little time ago. We used a JDO-Impl=
ementation but there's no AppSrv supporting it. So we had to port to JPA. A=
fter some evaluation (and some severe problems with OpenJPA) we decided to =
use Geronimo with EclipseLink. So far it works quite well. So IMHO you don'=
t need to port code from EL to OpenJPA but just use EL within Geronimo.=20
You say, that you need "to reduce the load on the MySQL servers". We also u=
sed a lot of time to reduce the load on the database server as well as on t=
he AppSrv. IMHO you should still take plain old SQL/JDBC into account, as s=
ometimes this might be the best choice to reduce load and improve performan=
ce.

Kind Regards, Michael


-----Urspr=FCngliche Nachricht-----
Von: David Jencks [mailto:david_jencks@yahoo.com]=20
Gesendet: Dienstag, 1. M=E4rz 2011 09:32
An: user@geronimo.apache.org
Betreff: Re: I need to pick your brains....

Hi Neil,

As far as I know openJPA and EclipseLink are both really good JPA implement=
ations.  I wasn't aware that either one provided data caching without add o=
n products, but I'm not an expert in either product.  In geronimo you are p=
robably more likely to be able to find help using openjpa because the geron=
imo developers know it better and openjpa is another apache project.  Other=
 than that guess I don't have much advice on a choice.

thanks
david jencks

On Feb 28, 2011, at 10:53 PM, Neil Franken wrote:

> Hi All
>=20
> I need some help to make up my mind about what technologies to use in my
> project. Now there is going to be some rather newbie questions in here
> but I need some input from people that work with the technology.
>=20
> Here is my problem. We are doing a project that requires us to use JPA.
> Now I need the JPA to be able to cache data to reduce the load on the
> MySQL servers. So over the last couple of days I have been doing a lot
> of porting of code from a Glassfish v3 and eclipselink project to
> Geronimo.=20
>=20
> However going through the documentation I had a look a OpenJPA as well.
> It seems that openJPA is also a very good product.... so my main
> question is.
>=20
> Which one is better to use in Geronimo.I know OpenJPA is allready
> available in Geronimo and from what I can find on the internet it seems
> to be a viable alternative to EclipseLink.
>=20
> So can anyone here shed some light on the choice I have to make? Seems
> like Java programmers in South Africa just use JDBC so finding someone
> to have a decent discussion about JPA/ORM Frameworks leads nowhere fast.
>=20
> Regards
> Neil
>=20