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[RCP] Hibernate in a plugin - HELP [message #264206]

Wed, 28 July 2004 08:14

Eclipse User

Originally posted by: djb.dolbyX.co.uk

I am struggling to use hibernate in a plugin. I have all the jars for
hibernate in one plugin. All my model classes for a database are in
another plugin and the user interface (views etc) are in another plugin.

These all get wrapped into an RCP app.

The problem is that hibernate cannot find the model classes at runtime.
I know this is to do with class loaders, but how can i make hibernate
find the classes.

Any help on this would be appreciative.

Thanks
Darren.

Re: [RCP] Hibernate in a plugin - HELP [message #264229 is a reply to message #264206]

Wed, 28 July 2004 10:23

Eclipse User

you can't if you arrange the layout you described you will not be able to do
it.

Hibernate injects stuff (collections) with its own versions of it so in
effect your model classes depend on hibernate and hibernate depends on your
model classes and this creates circular dependency between the plugins. As
far as of M8 it was not allowed, I am not sure of now, as I have not played
with eclipse for a while.

My suggestion is to merge hibernate and your model plugins to avoid endless
headaches and make separation of the modules on the source level only.

HTH,
Alex.

"Darren Bell" <djb@dolbyX.co.uk> wrote in message
news:ce857d$jb2$1@eclipse.org...
> I am struggling to use hibernate in a plugin. I have all the jars for
> hibernate in one plugin. All my model classes for a database are in
> another plugin and the user interface (views etc) are in another plugin.
>
> These all get wrapped into an RCP app.
>
> The problem is that hibernate cannot find the model classes at runtime.
> I know this is to do with class loaders, but how can i make hibernate
> find the classes.
>
> Any help on this would be appreciative.
>
> Thanks
> Darren.
>

Re: [RCP] Hibernate in a plugin - HELP [message #264242 is a reply to message #264229]

Wed, 28 July 2004 10:55

Eclipse User

Originally posted by: djb.dolbyX.co.uk

Alex Shneyderman wrote:
> you can't if you arrange the layout you described you will not be able to do
> it.
>
> Hibernate injects stuff (collections) with its own versions of it so in
> effect your model classes depend on hibernate and hibernate depends on your
> model classes and this creates circular dependency between the plugins. As
> far as of M8 it was not allowed, I am not sure of now, as I have not played
> with eclipse for a while.
>
> My suggestion is to merge hibernate and your model plugins to avoid endless
> headaches and make separation of the modules on the source level only.
>
> HTH,
> Alex.
>
> "Darren Bell" <djb@dolbyX.co.uk> wrote in message
> news:ce857d$jb2$1@eclipse.org...
>
>>I am struggling to use hibernate in a plugin. I have all the jars for
>>hibernate in one plugin. All my model classes for a database are in
>>another plugin and the user interface (views etc) are in another plugin.
>>
>>These all get wrapped into an RCP app.
>>
>>The problem is that hibernate cannot find the model classes at runtime.
>> I know this is to do with class loaders, but how can i make hibernate
>>find the classes.
>>
>>Any help on this would be appreciative.
>>
>>Thanks
>>Darren.
>>
>
>
>
Thanks Alex.

There must be a way to do this. My java model is not tied to Hibernate
as we may decide to use JDO. Is there some fudging that i can do with
classloaders?

Daz

Re: [RCP] Hibernate in a plugin - HELP [message #264328 is a reply to message #264206]

Wed, 28 July 2004 16:42

Eclipse User

Declare your model plugin as a dependency in your hibernate plugin's
plugin.xml file and it will be able to see those classes at runtime.
Your view plugin will declare both the model and hibernate plugins as
dependencies.

Hope that helps,
David

Darren Bell wrote:

> I am struggling to use hibernate in a plugin. I have all the jars for
> hibernate in one plugin. All my model classes for a database are in
> another plugin and the user interface (views etc) are in another plugin.
>
> These all get wrapped into an RCP app.
>
> The problem is that hibernate cannot find the model classes at runtime.
> I know this is to do with class loaders, but how can i make hibernate
> find the classes.
>
> Any help on this would be appreciative.
>
> Thanks
> Darren.
>

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