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From MiƂosz Tylenda <mtyle...@o2.pl>
Subject Re: Regd. OpenJPA feature
Date Wed, 25 Feb 2009 08:57:29 GMT
Ram,

Have you considered using fetch groups? They can be activated and deactivated at runtime.
For details see

http://openjpa.apache.org/builds/latest/docs/manual/manual.html#ref_guide_fetch

Also, there were some discussions on fetch groups on OpenJPA Users or Dev mailing lists in
the recent months.

Cheers,
Milosz


> In our application we have a requirement of changing the relationships
> between tables i.e. entities dynamically based on transactions. The
> scenario is described below:
> 
>  
> 
> There are 3 entities A, B and C available in the system. A is related to
> B and C in the database with foreign key. In transaction 1 the entities
> A and B are related and have to be fetched together for these 2 entities
> only. In transaction 2 A and C are only required but not B. Currently we
> are using Hibernate as the data access framework. Since the
> relationships have to be provided on static XMLs and cannot be changed
> later the system is retrieving the records of C also. Hence we are
> looking for the right Data Access framework to enable this functionality
> of changing relationships between entities at runtime. Please let us
> know whether OpenJPA supports this feature since I am not able to obtain
> much information from the documentation regarding this.
> 
>  
> 
>  
> 
> Regards,
> 
> Ram
> 
> 
> 
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