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Hibernate migration [message #523152]

Thu, 25 March 2010 11:18

No real name

Messages: 3
Registered: March 2010

Junior Member

Hi All,
We are currently using Hibernate.
We are migrating to EclipseLink
But due to resource/time constraints we cannot migrate the entire application to EclipseLink in one shot.

Can we use for 2 different set of tables Hibernate and EclipseLink simultaneouly in one application? Both Persistence technologies will connect to the same DB at the same time.
Will it have any negative consequences?
Will the performance be affected?
What precautionary measures should we take to prevent conflict between the 2 technologies?
Will it overload the application memory?

Thank you.

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Re: Hibernate migration [message #523155 is a reply to message #523152]

Thu, 25 March 2010 06:48

Tom Eugelink

Messages: 817
Registered: July 2009

Senior Member

> Will it have any negative consequences?

I figure two persistence engines will try to push bytecode into the class to handle a.o. lazy loading. That can't be good.

Tom

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Re: Hibernate migration [message #523289 is a reply to message #523152]

Thu, 25 March 2010 19:01

James Sutherland

Messages: 1939
Registered: July 2009
Location: Ottawa, Canada

Senior Member

I would try it and see. I have run both products on the same object model at the same time before and it did work.

James : Wiki : Book : Blog : Twitter

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Re: Hibernate migration [message #523582 is a reply to message #523155]

Fri, 26 March 2010 23:01

No real name

Messages: 3
Registered: March 2010

Junior Member

Thanks for your comments. We plan that all objects and child objects read and written to by Hibernate are not touched by EclipseLink and vice versa. So i do not understand how lazy loading could be harmful. Could you please elaborate what you meant?

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Re: Hibernate migration [message #523608 is a reply to message #523582]

Sat, 27 March 2010 07:22

Tom Eugelink

Messages: 817
Registered: July 2009

Senior Member

On 2010-03-27 0:01, subansuba@yahoo.co.in wrote:
> Thanks for your comments. We plan that all objects and child objects
> read and written to by Hibernate are not touched by EclipseLink and vice
> versa. So i do not understand how lazy loading could be harmful. Could
> you please elaborate what you meant?

Than it should be no problem.

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Re: Hibernate migration [message #911620 is a reply to message #523152]

Wed, 12 September 2012 01:36

Nisa Akeel

Messages: 1
Registered: September 2012

Junior Member

Hi I am almost doing the same Hibernate to Eclipselink migration , as I am new to this technology please provide your inputs on your implementaion & best practise that you follwed.

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