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From Raymond Auge <raymond.a...@liferay.com>
Subject Re: OSGi and Persistence
Date Mon, 25 Nov 2013 13:47:52 GMT
Peter, you can look at http://github.com/liferay/liferay-portal for a
complete picture of how we use hibernate, with some jpa configs as well.

Later today I can explicitly point out each case you outlined above to
clarify from our massive codebase. cache, tx, etc

We also have plugins which participate dynamically in the same persistence
"context" if you will.

Ray
On Nov 25, 2013 7:41 AM, "Peter Kriens" <peter.kriens@aqute.biz> wrote:

> I am doing some research on OSGi and persistence and I find the whole Java
> persistence story quite confusing and complex. Part of my problem is that I
> see lots of frameworks but it is quite hard to see code that really uses
> those frameworks. Virtually all tutorials and examples look highly
> contrived and seem to totally ignore issues like caching, security and seem
> to be rather lax concerning transactions.
>
> I wonder if people in this forum could share with me a typical production
> source file showing:
>
>         How entities are defined
>         The persistent use of the entity, i.e. the part where the SQL will
> be generated. I.e. places where the PersistenceManager, EntityManager, SQL
> generation is used
>         How results are cached
>
> A single source or class file per issue is best. Adding a small
> description how you use persistence (Aries, JPA, JDO, JDBC, etc), the
> primary issues you face, and describe your environment is highly
> appreciated.
>
> I know from my own experience that there is often a feeling that your own
> code is not up for showing to others but please send me the raw
> unadulterated code; I need to see how it is today, not how you think it
> should be. Obviously I am not interested in what the code does or where it
> is used so feel free to remove comments (if any!) and change names. I am
> just looking for a couple of hundred of real world samples to extract the
> patterns that are actually popular in our industry.
>
> Obviously I will not share that code with anyone and treat it fully
> confidential. Also would appreciate a little description how you use
> persistence in OSGi.
>
> So in this case, do not ask what the OSGi can do for you, but for once,
> ask what you can do for the OSGi! ;-)
>
> Please? Come on, it only takes 3 minutes. Send your 4 files to:
> Peter.Kriens@aQute.biz
>
> Kind regards,
>
>         Peter Kriens
>
>
>
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