Quick Question

[twoencore]

i have a very large ApplicationContext.xml, for our entire app.
i want to break it up like

applicationContext-dao.xml , has my hibernat DAO stuff with JNDI


which is imported into the main applicationContext.xml


how would the syntax of the applicationContext.xml look if i want to use this at a pace in the xml file..

[Alarmnummer]

3.18. Importing Bean Definitions from One File Into Another
and check 3.19.

[roman]

You should also consider to break your xml file in vertical slices.

So you could have:
dataSource.xml -> Database connection, Hibernate, etc
globalConfig.xml -> messages, PropertyPlaceholders, etc
-servlet.xml -> DispatcherServlet

and for every slice a *Context.xml file with all of the beans that are relevant to the slice. For example:
userContext.xml
orderContext.xml
newsContext.xml
...
Each of these xml files should contain the daos, service layer, web stuff, etc. I think it´s a good idea to break an application into these "application components".

[twoencore]

the break up to

dataSource.xml -> Database connection, Hibernate, etc
globalConfig.xml -> messages, PropertyPlaceholders, etc

pattern is good..

however breaking up each DAO mapping into a seperate file might not be a good pattern, even in J2ee DD they have one file for all the DAO config info.

thanks all for the answer & info.

[roman]

even in J2ee DD they have one file for all the DAO config info

J2EE is one thing, OO and the application layout another. IMHO, J2EE and other technologies shouldn´t dictate your DESIGN. Even in an middle sized app with 50 DAOs in one xml file, this file quickly becomes unmanageable.

For me, it makes a lot of sense to group the DAOs that a part of an "application component" (perhaps module is a better name) besides the service layer, etc.

The component idea can be applied at several levels. Fine grained components such as DAOs, validators, etc and coarse grained components such as a user management, order management, etc.
Each coarse grained component has it´s own service layer AND configuration.

Best regards,

Roman