Hi Geert, two last questions :)
Does RIFE´s persistencelayer support declarative Trannactions using Annotations (like @Transactional from the Spring Framework) ? Is RIFE already plugable into the Springframework´s Transactionmanagement ? cheers, Andreas On 2/6/07, Geert Bevin <[EMAIL PROTECTED]> wrote:
Hi Andreas, no, RIFE doesn't detect constraints from other frameworks. Though it should be technically possible since RIFE's MetaData classes can be populated dynamically at runtime. It is outside the scope of the core framework though, so if it would be added it would be through external contributions. Best regards, Geert On 06 Feb 2007, at 09:11, Andreas Andreakis wrote: > Hi Geert, > > thank you for your quick response. > > Is it possible to plugin Constraints into RIFE from other frameworks ? > > Lets assume Im using Hibernate as my primary persistence solution > and I define Hibernate mappings, which contain constraints (like > not null, length for varchars, etc..). Can RIFE reuse this > constraints ? > Or is it required to create a RIFE MetaData class as well > (containing the same or more constraints) ? > > kidn regards, > Andreas > > > > > > On 2/5/07, Geert Bevin <[EMAIL PROTECTED]> wrote:Hi Andreas, > > > I have some questions regarding RIFE´s persistence features. > > > > 1) Is the auto DatabaeSchema generation configurable ? For example: > > Consider > > a hierarchie, is it possible to say "save every class into its own > > table" or > > "save the complete hierarchie into one table" > > No, it's not configurable, either you use CreateTable yourself, > either you rely on the automated rules that map beans to table. I'm > planning on adding the possibility to configure the properties > mappings and table names through constraints though. > > > 2) How does RIFE cooperate with Hibernate ? > > You can use both at the same time. The same datasource can be used, > the only problem that can arise is when instances in the OR manager > linger in cache and aren't found when RIFE is accessing the database > directly. > > > If I let RIFE create the Database-schema (auto-generated over a > > MetaData > > class), is it required to create a Hibernate Mapping file as well ? > > No, you have to create nothing, it's all done by convention. However, > as said above the name mapping will become configurable. > > > 3) is Lazy Fetching supported ? for instance fetching lazily > > elements of a > > list (instead of loading the complete list into the memory) > > Yes, in the SVN repository we have lazy fetching for many-to-many > mappings. I'm still working on lazy fetching for single bean > instances as properties for one-to-one or many-to-one mappings. > > > 4) what about cascading ? > > You can use callbacks if you need to do cascading in Java, however > many database support this natively and you can just rely on that. > > > 5) is there support for Second Level caching ? > > Not natively, this is also something that can be added through > callbacks and / or GQM listeners. I do think that at one time > something better integrated should be developed. > > > 6) is there anything missing (compared to Hibernate, or other > > Persistence > > frameworks) ? > > A lot, since they are different beasts and if you need the power of > JPA or Hibernate, by all means, use those. RIFE doesn't provide an > ORM solution with an entity manager and such. It doesn't provide > table hierarchies, not composite keys. The GQM is currently also > limited to integers as identifiers, ... and so on. However, the > approach is a wrapping approach that basically put layers on top of > what you would normally do in plain JDBC and SQL. The APIs give you a > much higher level approach to achieve the same functionalities while > still being able to drill down when needed. > > Hope this helps, > > Geert > > -- > Geert Bevin > Uwyn "Use what you need" - http://uwyn.com > RIFE Java application framework - http://rifers.org > Music and words - http://gbevin.com > > > _______________________________________________ > Rife-users mailing list > Rife-users@uwyn.com > http://lists.uwyn.com/mailman/listinfo/rife-users > > _______________________________________________ > Rife-users mailing list > Rife-users@uwyn.com > http://lists.uwyn.com/mailman/listinfo/rife-users -- Geert Bevin Uwyn "Use what you need" - http://uwyn.com RIFE Java application framework - http://rifers.org Music and words - http://gbevin.com _______________________________________________ Rife-users mailing list Rife-users@uwyn.com http://lists.uwyn.com/mailman/listinfo/rife-users
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