On Dec 17, 2007, at 7:19 AM, Alexander Saint Croix wrote:
Thanks for the help, David.
I broke up the component library to make it modular, as there are
presently
between 70-100 entities total.
Ok, just to be clear though, you cannot have managed relationships to
entities outside your unit. Forgetting all things packaging, a unit
is one cache of data managed by the Provider. The provider cannot see
or manage data (including relationships) outside the unit (i.e. its
cache). It's fine to break your units up just as long as you're doing
it consciously and deliberately with that in mind.
Do my component JARs need to have persistence.xml files at all?
None of
them are the root of the persistence unit--that seems to be the WAR.
Shouldn't I define the persistence.xml file in the web app and
reference the
JARs from there? It would certainly simplify matters.
If you put your persistence.xml in the webapp and listed your 70-100
persistent classes in it, you could spread the classes into as many
WEB-INF/lib jars as you like. Doing this is essentially feeding the
provider all the class names it should make persistent and not relying
on the jar searching for the @Entity annotation. There might be a
better option, but that is one approach I know should work.
Also, in which file do I configure my DataSource in embedded OpenEJB?
In your openejb.xml via:
<Resource id="myJtaDatasource" type="DataSource">
JdbcDriver = com.mysql.jdbc.Driver
JdbcUrl = jdbc:mysql://localhost/corm
UserName = root
Password = n00p455wyrd
</Resource>
<Resource id="myNonJtaDatasource" type="DataSource">
JdbcDriver = com.mysql.jdbc.Driver
JdbcUrl = jdbc:mysql://localhost/corm
UserName = root
Password = n00p455wyrd
JtaManaged = false
</Resource>
Note that JtaManaged only works in trunk, so if you're using beta 1
you'll need to declare myNonJtaDatasource as follows:
<Resource id="myNonJtaDatasource" type="DataSource"
provider="Default Unmanaged JDBC Database">
JdbcDriver = com.mysql.jdbc.Driver
JdbcUrl = jdbc:mysql://localhost/corm
UserName = root
Password = n00p455wyrd
</Resource>
-David
